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Service Manual

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1. Procedure 1 Press the CHECK button twice lt CHECK lights and refrigerant address Refrigerant 00 blinks rs 5 a mi display lt Check that the remote controller s CHECK display has stopped before continuing display 2 Press the temperature Select the refrigerant address of the Temperature buttons indoor unit for the self diagnosis ON OFF KTEMP Note Set refrigerant address using the 0 0 outdoor units DIP switch SW1 OEE For more information see the button VY outdoor unit installation manual GO FAN AUTO STOP HO O O I MODE VANE AVTOSTAR 3 Point the remote controller at If an air conditioner error occurs the lt O l HOUR the sensor on the indoor unit indoor unit s sensor emits an intermittent CHECK JILOUVER 2 and press the HOUR button buzzer sound the operation lamp blinks CHECK Iran and the error code is output button 4 It takes 3 seconds at most for error ST RT clock og code to appear 4 Point the remote controller at The check mode is cancelled the sensor on the indoor unit and press the ON OFF button OCH512 25 e Refer to the following tables for details on the check codes Output pattern A Beepersounds Beep Beep Beep Beep Beep Beep Beep OPERATION _ fs 26 ae ne ia Jana Repeated INDICATOR MES s 4 gt lamp blink Off On On O On Off On On pattern Self ch
2. OCH512 Outdoor heatsink temperature TH8 on error occurring 40 327 69 40 327 40 164 C When the temperature is 0 F or less and temperature are displayed by turns When the temperature is 100 F or more hundreds digit tens digit and ones digit are displayed by turns SW2 setting Display detail The black square m indicates a switch position Explanation for display Discharge superheat on error occurring SHd 32 360 Cooling TH32 TH6 Heating TH32 TH5 32 360 0 182 C When the temperature is 100 F or more hundreds digit tens digit and ones digit are displayed by turns Example When 150 F 0 5 secs 0 5 secs 2 secs 1 50 gt Sub cool on error occurring SC 32 266 Cooling TH6 TH3 Heating TH5 TH2 32 266 0 130 C When the temperature is 100 F or more hundreds digit tens digit and ones digit are displayed by turns Example When 115 F 0 5 secs 0 5 secs 1 gt 15 gt 2 secs Thermostat on time until error stops 0 999 0 999 When it is 100 minutes or more hundreds digit tens digit and ones digit are displayed by turns Example When 415 minutes 0 5 secs 0 5 secs 4 gt 15 gt 2 secs Minute U9 Err
3. ata MITSUBISHI ELECTRIC 4 Example Request code 004 Discharge temperature 156 F iii Hii is 5 Refrigerant address 00 x Ta DON OFF 7 ii TOD TARSO OMENU OON OFF Gal Si FILTER 2 A Mode display gt 4 gt an 5 O 1 B Refrigerant address PAR 21MAA 7 A OEN C Data display area 4 2 6 D Request code display area 1 Press the TEST button for 3 seconds so that Maintenance mode appears on the screen at 2 Press the CHECK button for 3 seconds to switch to Maintenance monitor Note It is not possible to switch to Maintenance monitor during data request in maintenance mode i e while is blinking since no buttons are operative Operating the service inspection monitor appears on the screen at when Maintenance monitor is activated The display at now allows you to set a request code No 3 Press the TEMP buttons C gt and CA 5 to select the desired refrigerant address Screen nn gt m 4 gt gt 5 4 Press the CLOCK buttons C gt and CA 5 to set the desired request code No 5 Press the FILTER button to perform data request The requested data will be displayed at in the same way as in maintenance mode Data collected during operation of the remote controller will be displayed The collected data such as temperature data will not be updated automatically eve
4. Connectors power supplies only Sw8 Indoor unit power supplied from outdoor unit Initial setting 4 Demo There are three types of labels labels A B and C Affix the appropriate labels to wA Indoor unit the units according to the wiring method control board S3 C Separate indoor unit outdoor unit power supplies LA A42 Indoor unit model POA NAS PEAD A42 Indoor unit power supply Single 208 230 V 60 Hz Single 208 230 V 60 Hz Minimum circuit ampacity 2A 3 50A Maximum rating of overcurrent protective device 15A 15A Indoor unit power supply 2 x Min AWG 16 _ Indoor unit power supply earth 1 x Min AWG 16 ga Indoor unit Outdoor unit 2 x AWG 22 polar 3 x 1 5 polar Indoor unit earth 1 x Min 1 5 Remote controller Indoor uni 2 x AWG 22 Non polar 2 x 0 3 Non polar Indoor unit L1 L2 AC 208 230 V AC 208 230 V Indoor unit Outdoor unit S1 S2 Indoor unit Outdoor unit S2 S3 DC 24 V DC 24 V Remote controller Indoor uni DC 12 V DC 12 V 1 Max 120 m 393 ft 2 The 10 m 30 ft wire is attached in the remote controller accessory Max 500 m 1500 ft 3 The figures are NOT always against the ground N D x Ss Zz rating Notes 1 Wiring size must comply with the applicable local and national code 2 Use copper supply wires 3 Use wires rated 300V or more for the power supply cables 4 Install a
5. Display Model setting state Display Model setting state 00 20 01 21 02 22 03 23 04 24 05 25 PLA A BA 06 26 07 27 08 28 09 29 OA 2A Ob 2b oC 2C Od 2d 0E 2E OF 2F 10 30 11 31 PCA A KA 12 32 13 33 14 34 15 35 16 36 17 37 18 38 19 39 1A 3A 1b 3b 1C 3C 1d 3d 1E 3E 1F 3F Display Capacity setting state Display Capacity setting state 00 10 42 01 11 02 12 03 13 04 14 05 15 06 12 16 07 17 08 18 09 18 19 OA 1A Ob 24 1b OC 1C 0d 30 1d 0E 1E OF 36 1F Wireless pair No indoor control board side setting Request code 165 Data display 0 0 OCH512 See the table on the right Display Pair No setting state 00 No 0 01 No 1 J41 disconnected 02 No 2 J42 disconnected 03 No 3 J41 J42 disconnected 92 14 DISASSEMBLY PROCEDURE PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS OPERATING PROCEDURE PHOTOS amp ILLUSTRATION 1 Removing the service panel and top panel 1 Remove 3 service panel fixing screws 5 x 12 and slide the hook on the right downward to remove the service Top panel fixing screws Top panel Figure 1 Een cay a lt Service panel I panel 7 ji 2 Remove screws 3 for front 3 for rear 5 x 12 of the top Grille fixing panel and remove it scre
6. Error postponement code history 2 of outdoor unit Postponement code display Blinking During postponement Lighting Cancellation of postponement 00 is displayed in case of no postponement Code display Error postponement code history 3 of outdoor unit Postponement code display Blinking During postponement Lighting Cancellation of postponement 00 is displayed in case of no postponement Code display Error code history 3 Oldest Alternate display of abnormal unit number and code When no error history 0 and are displayed by turns Code display Error thermistor display When there is no error thermistor is displayed 3 Outdoor pipe temperature Liquid TH3 6 Outdoor pipe temperature 2 phase TH6 7 Outdoor outside temperature TH7 8 Outdoor heatsink TH8 Code display Operation frequency on error occurring 0 255 0 255 When it is 100Hz or more hundreds digit tens digit and ones digit are displayed by turns Example When 125Hz 0 5 secs 0 5 secs 2 secs 1 gt 25 gt 4 Fan step on error occurring 0 10 OCH512 68 SW2 setting Display detail The black square m indicates a switch position Explanation for display LEV A opening pulse on error occurring 0 480 0 480
7. Inspection Is 000 displayed stably in Display on the remote controller Stable Unstable g Temperature Discharge temperature Outdoor F O difference heat exchanger temperature Indoor intake air temperature F Indoor heat exchanger temperature Inspection Is 000 displayed stably in Display on the remote controller Stable Unstable 8 Temperature Discharge temperature Indoor F difference heat exchanger temperature Indoor heat exchanger temperature F Indoor intake air temperature Fixed Hz operation may not be possible under the following tempera ture ranges A ln cool mode outdoor intake air temperature is 104 For higher or indoor intake air temperature is 73 F or lower B In heat mode outdoor intake air temperature is 68 F or higher or indoor intake air temperature is 77 F or lower If the air conditioner is operated at a temperature range other than the ones above but operation is not stabilized after 30 minutes or more have elapsed carry out inspection In heat mode the operation state may vary due to frost forming on the outdoor heat exchanger Heat mode Cool mode oF oF 81 kr 1 Inspection CG Filter inspection wj N 72 A 63 a a Filter inspection nn SANE DER DERI on N YV NO N AD O O Inspection B o o
8. v Is the voltage normal gt Yes gt C Replace the fan motor J No Yes OK Check the operation of fan END Replace outdoor controller board y NG C Replace outdoor controller board gt v OK Check the operation END 4 NG Replace the fan motor gt OCH512 48 10 7 HOW TO CHECK THE COMPONENTS lt Thermistor feature chart gt Low temperature thermistors e Thermistor lt Outdoor pipe gt TH3 e Thermistor lt Outdoor 2 phase pipe gt TH6 e Thermistor lt Outdoor gt TH7 Thermistor RO 15kQ 3 B constant 3480 2 his t C Rt 15exp 3480 273 273 1 YA TCF RT 15exp 3480 273 T 32 1 8 273 OC 32 F 15kQ 30C 86 F 4 3ko 10 C 50 F 9 6kQ 40 C 104 F 3 0kQ 20 C 68 F 6 3kQ 25 C 77 F 5 2kQ Medium temperature thermistor e Thermistor lt Heatsink gt TH8 Thermistor R50 17kKQ 2 B constant 4170 3 I LA t C Rt 17exp 4170 57934 373 1 1 T F Rt 17exp 4170 273 T 32 1 8 323 OC 32 F 180kQ 25 C 77 F 50kQ 50 C 122 F 17kQ 70 C 158 F 8kQ 90 C 194 F AkQ High temperature thermistor e Thermistor lt Shell gt TH32 Thermistor R120 7 465kQ 2 B constant 4057 2 la t C Rt 7 465exp 4057 273 t 393 1 1 TCF RT 7 465exp 4057 273 T 32 1 8 393 20C 68 F 250kQ 30C 86 F 160kQ 40C 04F 104kQ 5O
9. 5 1 REFILLING REFRIGERANT CHARGE R410A oz kg Piping Length orle way F Service Ref 100ft 110ft 120ft GINA 30m 33m 37m PUZ A42NHA5 160 oz 166 oz PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS 3 I i 4 5kg 4 7kg Longer pipe than 70 or 100 ft additional charge is required 5 2 COMPRESSOR TECHNICAL DATA at 20 C 68 F PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS Service Ref Compressor model ANB33FCTMT 0 302 Winding Registance Q 5 0 302 0 302 PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 toe PUY A42NHA5 BS HEATING 55 e e _ 90 i T r e y m 60 MICROPHONE 4 O W 50 3 3ft 7 UNIT 0 c 40 KA 2 3 30 5ft Q 20 APPROXIMATE z wes i 8 p poi GROUND iad F r 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz OCH512 8 5 3 STANDARD OPERATION DATA 5 3 1 Heat pump Representative matching PLA A42BA4 Mode COOLING HEATING Total Capacity 42 000 45 000 Input 4 600 4 450 Electrical circuit Indoor unit model PLA A42BA4 Phase Single Cycle 60Hz Voltage 230V Current 0 94A Outdoor unit model PUZ A
10. If the filter is clogged indoor pipe tem perature rises and discharging pressure increases Check if heat exchanger is clogged by inspecting discharging pres sure Clean the heat exchanger Remove the blockage Check refrigerant system during operation 8 OFor 3 minutes after temperature adjuster turns off the compressor will not start operating even if temperature adjuster is turned on For 3 minutes after temperature adjuster turns on the compressor will not stop operating even if temperature adjuster is turned off Compressor stops operating immediately when turning off by the remote controller OCH512 Normal operation For protection of compressor 38 Normal operation Symptoms PLEASE WAIT is kept being displayed on the remote controller Inspection method and Diagnosis flow troubleshooting Check the display time of PLEASE WAIT after turning on the main power 6 minutes 2 minutes or more ow long is PLEASE WAIT or less e kept being displayed on the PLEASE WAIT emote controller e Normal will be displayed The start up diagnosis will during the start up be over in around 2 minutes 2 to 6 diagnosis after turning minutes on the main power Are any error codes displayed on the emote controller Check the LED display of the outdoor controller circuit board YES Are any error codes lt Miswiring of indoo
11. Press the O ON OFF button gt Self diagnosis will be cancelled and the indoor unit will stop 10 3 3 Remote Controller Diagnosis If the air conditioner cannot be operated from the remote controller diagnose the remote controller as explained below First check that the power on indicator is lit O amen If the correct voltage DC12 V is not supplied to the remote controller the SELF CHECK indicator will not light If this occurs check the remote controller s wiring and the indoor unit el en Power on indicator Switch to the remote controller self diagnosis mode Press the FILTER button to start self diagnosis Pressthe CHECK button for 5 seconds or more The display content will change as shown below SELF CHECK St K mp hee PL AL t Remote controller self diagnosis result When the remote controller is functioning correctly When the remote controller malfunctions Error display 1 NG blinks gt The remote controller s transmitting receiv ing circuit is defective r ik r NG PL A Pr aR Check for other possible causes as there is no problem with the remote The remote controller must be replaced with a new one controller I I I I I I ZELF CHECK I ZELF CHECK I I I I I I I Where the remote controller is not defective but cannot be operated Error display 2 E3 6
12. TH5 1 When the temperature is OF or less Indoor 1 temperature are displayed by turns 38 190 Indoor pipe temperature Liquid TH2 2 38 190 39 88C Indoor 2 When the temperature is 0 F or less 38 190 temperature are displayed by turns Indoor pipe temperature Cond Eva 38 190 39 88 C TH5 2 When the temperature is OF or less Indoor 2 temperature are displayed by turns 38 190 Indoor room temperature TH1 46 102 8 39 C 46 102 OCH512 66 SW2 setting Display detail The black square m indicates a switch position Explanation for display ON Indoor setting temperature 62 86 62 86 17 30C Outdoor pipe temperature 2 phase pipe TH6 38 190 38 190 39 88C When the temperature is 0 F or less and temperature are displayed by turns Outdoor outside temperature TH7 38 190 38 190 39 88 C When the temperature is 0 F or less and temperature are displayed by turns Outdoor heatsink temperature TH8 40 327 40 327 40 164C When the temperature is 0 F or less and temperature are displayed by turns When the thermistor detects 100 F or more hundreds digit tens digit and ones digit are displayed by turns Discharge superheat SHd 32 360 Cooling TH32 TH6 Heating TH32 TH
13. Appearance Good Cleaning required 8 g Heat exchanger Good Cleaning required Sound vibration None Present e Air intake air temperature COOL HEAT oF 8 Air discharge temperature COOL HEAT F 2 3 Refrigerant heat exchanger temperature COOL HEAT PE 5 Filter operating time Time S Decorative panel Good Cleaning reguired g 2 Filter Good Cleaning required 5 Fan Good Cleaning required o Heat exchanger Good Cleaning required Sound vibration None Present The filter operating time is the time that has elapsed since the filter was reset Check item Normal Normal operation state KENEN Filter inspection Filter may be clogged 1 clogged Inspection A Performance has dropped Detailed in spection is necessary Inspection B Refrigerant amount is dropping Inspection C Filter or indoor heat exchanger may be The above judgement is just guide based on Japanese standard conditions 1 It may be changed depending on the indoor and outdoor temperature It may be judged as filter inspection due to the outdoor and indoor temperature even though it is not clogged OCH512 Check Points Enter the temperature differences between and into the graph given below Operation state is determined according to the plotted areas on the graph For data measurements set the fan speed to Hi before activat ing maintenance mode Classification
14. M NET type outdoor unit M NET type outdoor unit ye x M NET transmission wire O Good example 2 Single spot grounding of shield wire Central remote controller Power supply appliance M NET type outdoor unit M NET type outdoor unit M NET type outdoor unit N ZI M NET transmission wire If there are more than 2 grounding spots on the shield wire noise may enter into the shield wire because the ground wire and shield wire form one circuit and the electric potential difference occurs due to the impedance difference among ground ing spots In case of single spot grounding noise does not enter into the shield wire because the ground wire and shield wire do not form one circuit To avoid communication errors caused by noise make sure to observe the single spot grounding method described in the installation manual OCH512 16 M NET wiring 1 Use 2 core lt 1 25mm AWG16 shield wire for electric wires M NET LG Excluding the case connecting to system controller nel Ground 2 Connect the wire to the M NET terminal block Connect one core of the Q le wire transmission wire non polar to A terminal and the other to B Peel the shield wire twist the shield part to a string and connect it to S terminal AL Bl s 9 3 In the system which several outdoor units are being connected th
15. OCH512 Operation mode of when operation stops due to error is displayed by setting SW2 as below SW2 64 Code display SW2 setting Display detail The black square m indicates a switch position Explanation for display Pipe temperature Liquid TH3 on error occurring 40 194 40 194 40 90 C When the coil thermistor detects 0 F or below and temperature are displayed by turns Example When 15 F 0 5 secs 0 5secs 2 secs 15 gt z Shell temperature TH32 on error occurring 37 327 37 327 3 164C When the temperature is 100 F or more the hundreds digit tens digit and ones digit are displayed by turns Example When 130 F 0 5 secs 0 5secs 2 secs 1 gt 30 Compressor operating current on error occurring 0 50 Error code history 1 latest Alternate display of abnormal unit number and code When no error history 0 and are displayed by turns Code display Error code history 2 Alternate display of error unit number and code When no error history 0 and are displayed by turns Code display Thermostat ON time 0 999 0 999 When it is 100 minutes or more the hundreds digit tens digit and ones digit are displayed by turns Examp
16. 2 Remove the top panel See Figure 1 Removing the 4 way valve coil 3 Remove 4 way valve coil fixing screw M4 x 6 4 Remove the 4 way valve coil by sliding the coil toward you 5 Disconnect the connector 21S4 green on the controller circuit board in the electrical parts box Removing the linear expansion valve coil 3 Remove the linear expansion valve coil by sliding the coil upward 4 Disconnect the connectors LEV A white on the controller circuit board in the electrical parts box Removing the 4 way valve 1 Remove the service panel See Figure 1 2 Remove the top panel See Figure 1 3 Remove 3 valve bed fixing screws 4 x 10 4 ball valve and stop valve fixing screws 5 x 16 then remove the valve bed 4 Remove 4 right side panel fixing screw 5 x 12 in the rear of the unit and then remove the right side panel 5 Remove the 4 way valve coil See Photo 7 6 Recover refrigerant 7 Remove the welded part of 4 way valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remov ing the right side panel Note 3 When installing the 4 way valve cover it with a wet cloth to prevent it from heating 250 F or more then braze the pipes so that the inside of pipes are not oxidized Removing linear expansion valve 1 Remove the service panel See Figure 1 2 Remove the top panel See Figure 1 3 Remove 3
17. End Detailed setting 4 1 CHANGE LANGUAGE setting The language that appears on the dot display can be selected Press the MENU button to change the language Japanese JP English GB German D Spanish E Russian RU ltalian I Chinese CH French F 4 2 Function limit 1 Operation function limit setting operation lock To switch the setting press the OON OFF button not All operation buttons except ON OFF button are locked no2 All operation buttons are locked OFF Initial setting value Operation lock setting is not made To make the operation lock setting valid on the normal screen it is necessary to press buttons Press and hold down the FILTER and ON OFF buttons at the same time for 2 seconds on the normal screen after the above setting is made 2 Use of automatic mode setting OFF When the remote controller is connected to the unit that has auto matic operation mode the following settings can be made To switch the setting press the ON OFF button ON Initial setting value The automatic mode is displayed when the operation mode is selected The automatic mode is not displayed when the operation mode is selected 3 Temperature range limit setting After this setting is made the temperature can be changed within the set range To switch the setting press the ON OFF button LIMIT TEMP C
18. Filter clogging Heat exchanger clogging Air duct short cycle O If refrigerant leaks discharging tempera ture rises and LEV opening increases Inspect leakage by checking the tempera ture and opening Check pipe connections for gas leakage Open intake grille and check the filter Clean the filter by removing dirt or dust on it If the filter is clogged indoor pipe tem perature rises and discharging pressure increases Check if heat exchanger is clogged by inspecting discharging pres sure Clean the heat exchanger Remove the blockage 7 Remote controller display works normally and the unit performs heat ing operation however the capacity cannot be fully obtained Linear expansion valve fault Opening cannot be adjusted well due to linear expan sion valve fault Refrigerant shortage Lack of insulation for refrigerant piping Filter clogging Heat exchanger clogging Air duct short cycle Bypass circuit of outdoor unit fault Discharging temperature and indoor heat exchanger temperature does not rise Inspect the failure by checking discharging pressure Replace linear expansion valve If refrigerant leaks discharging tempera ture rises and LEV opening increases Inspect leakage by checking the tempera ture and opening Check pipe connections for gas leakage Check the insulation Open intake grill and check the filter Clean the filter by removing dirt or dust on it
19. When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns Example When 130 pulse 0 5 secs 0 5 secs 2 secs 1 gt 30 gt 1 Indoor room temperature TH1 on error occurring 46 102 46 102 8 39 C Indoor pipe temperature Liquid TH2 on error occurring 38 190 38 190 39 88 C When the temperature is OF or less and temperature are displayed by turns Example When 15 F 0 5 secs 0 5 secs 2 secs gt 15 gt Indoor pipe temperature Cond Eva TH5 on error occurring 38 190 38 190 39 88 C When the temperature is OF or less and temperature are displayed by turns Example When 15 F 0 5 secs 0 5 secs 2 secs gt 15 gt Outdoor pipe temperature 2 phase TH6 on error occurring 38 190 38 190 39 88 C When the temperature is OF or less and temperature are displayed by turns Example When 15 F 0 5 secs 0 5 secs 2 secs 2 gt 15 gt Outdoor outside temperature TH7 on error occurring 38 190 38 190 39 88 C When the temperature is OF or less and temperature are displayed by turns Example When 15 F 0 5 secs 0 5 secs 2 secs gt 15 gt
20. green once and red twice blink alternately lt F5 gt e Outdoor units protection device connector is open No display appears even when remote controller operation switch is turned on Operation lamp does not light up After startup is displayed green twice and red once blink alternately lt EA Eb EC gt Incorrect wiring between the indoor and outdoor unit Polarity is wrong for S1 S2 S3 Remote controller transmission wire is short After startup is displayed only green lights up lt 00 gt e There is no outdoor unit of address 0 Address is other than 0 e Remote controller transmission wire is open Display appears but soon disappears even when remote controller is operated After startup is displayed only green lights up lt 00 gt After canceling function selection operation is not possible for about 30 seconds Normal x Press the remote controller s CHECK button twice to perform self diagnosis See the table below for the contents of LCD display Contents of inferior phenomena LCD Contents of inferior phenomena P1 Abnormality of room temperature thermistor U1 UP Malfunction outdoor unit P2 Abnormality of pipe temperature thermistor Liquid F3 F9 Malfunction outdoor unit P4 Abnormality of drain sensor Float switch connector open E0 E5 Remote controller transmitting error P5 Drain over
21. gt Check the looseness or disconnection of the indoor outdoor connecting wire Are there looseness or disconnection of the indoor qutdoor connecting wire Check the refrigerant address of the outdoor unit SW1 3 to 1 6 Is the refrigeran address 0 YES Check the LED display of the outdoor unit after turning on the main power again Not displayed Is anything displayed Displayed Is EA or Eb NO displayed Check the voltage between S2 and S3 on the terminal block of the outdoor unit NO Is E8 displayed NO Can the unit be restarted an all the indoor unit be operated DC 17V to DC 28V YES OCH512 41 e Breaking or poor contact of the indoor outdoor connecting wire e Normal Only the unit which has the refrigerant address 0 supplies power to the remote controller lt Defective outdoor controller circuit board lt Defective outdoor controller circuit board Defective indoor controller board Influence of electromagnetic noise lt Defective outdoor power circuit board lt Defective indoor power board e Fix the breaking or poor contact of the indoor outdoor connecting wire e Set the refrigerant address to 0 In case of the multiple grouping system recheck the refrigerant address again e Replace the o
22. ntake air temperature DB Indoor side ntake air temperature WB Discharge air temperature DB Outdoor Intake air temperature DB side ntake air temperature WB ntake air temperature DB Indoor side ntake air temperature WB Discharge air temperature DB Outdoor ntake air temperature DB side ntake air temperature WB OCH512 10 OUTLINES AND DIMENSIONS 6 mm lt inch gt Uni PUZ A42NHA5 BS PUY A42NHA5 BS PUZ A42NHA5 PUY A42NHA5 AA SS apes S lt a Kene Fee goes lt ze le e gt APA noxoouy lt 91 6 2 gt 99 A eet RB amp jame lou ueq Spl Syt SbF Oee lou Buidid 1294 gt lt g g gt z6 BA Te ei NES IS lt 8 6 gt z6
23. will blink on the display section of the room temperature and lamp green of the remote controller will blink As to INDOOR BOARD LED LED1 will be lit LED2 will either be lit in case the address is 0 or turned off in case the address is not 0 LED3 will blink As to OUTDOOR BOARD LED LED1 green and LED2 red will be lit After the startup mode of the system finishes LED2 red will be turned off In case OUTDOOR BOARD LED is digital display D and will be displayed alternately every second lt If one of the above operations does not function correctly the causes written below should be considered Find causes from the symptoms The below symptoms are under test run mode startup in the table means the display status of 1 written above Symptoms in test run mode Remote Controller Display OUTDOOR BOARD LED Display Cause lt gt indicates digital display Remote controller displays PLEASE WAIT and cannot be operated After startup is displayed only green lights up lt 00 gt After power is turned on PLEASE WAIT is displayed for 2 minutes during system startup Normal After power is turned on PLEASE WAIT is displayed for 3 minutes then error code is displayed After startup is displayed green once and red once blink alternately lt F1 gt Incorrect connection of outdoor terminal block L1 L2 and 1 S2 3 After startup is displayed
24. 1 2 beeps 0 4 seconds each 2 2 beeps 0 4 seconds each repeated twice 3 2 beeps 0 4 seconds each repeated 3 times If a setting number that cannot be recognized by the unit is entered the setting will turn back to the original setting If the signal was not received by the sensor you will not hear a beep or a double ping sound may be heard Reenter the setting number Repeat steps and to make an additional setting without changing unit number Repeat steps to to change unit number and make function settings on it Complete the function settings Press button Do not use the IR wireless remote controller for 30 seconds after completing the function setting OCH512 79 12 2 FUNCTION SELECTION OF REMOTE CONTROLLER The setting of the following remote controller functions can be changed using the remote controller function selection mode Change the setting when needed Item 1 Item 2 Item 3 Setting content 1 Change language Language setting to display e Display in multiple languages is possible CHANGE LANGUAGE 2 Function limit 1 Operation function limit setting operation lock LOCKING FUNCTION lt Setting the range of operation limit operation lock FUNCTION SELECTION Use of automatic mode setting SELECT AUTO MODE Setting the use or non use of automatic operation mode e Setting the temperature adjustable range maxi
25. Eva pipe temperature Unit No 1 38 190 op 0 is displayed if the target unit is not present 43 Indoor unit Cond Eva pipe temperature Unit No 2 38 190 F t 44 Indoor unit Cond Eva pipe temperature Unit No 3 38 190 oF t 45 Indoor unit Cond Eva pipe temperature Unit No 4 38 190 SE t 46 47 48 Thermo ON operating time 0 999 Minutes 49 Test run elapsed time 0 120 Minutes lt Not possible to activate maintenance mode during the test run OCH512 84 Request code Description Request content Unit Remarks Display range 50 Indoor unit Control state Refer to 13 2 1 Detail Contents in Request Code 51 Outdoor unit Control state Refer to 13 2 1 Detail Contents in Request Code 52 Compressor Frequency control state Refer to 13 2 1 Detail Contentsin Request Code 53 Outdoor unit Fan control state Refer to 13 2 1 Detail Contentsin Request Code 54 Actuator output state Refer to 13 2 1 Detail Contents in Request Code 55 Error content U9 Refer to 13 2 1 Detail Contents in Request Code 56 57 58 59 60 Signal transmission demand capacity 0 255 61 Contact demand capacity Refer to 13 2 1 Detail Contents in Request Code _ 62 External input state si
26. Simultaneous twin system N A NG Outdoor unit power supply Wiring circuit breaker or isolating switch Outdoor unit Indoor unit outdoor unit connecting cords Remote controller Indoor unit Indoor unit earth Indoor unit model Indoor unit power supply PLA A42 PCA A42 PEAD A42 Minimum circuit ampacity Maximum rating of overcurrent protective device Outdoor unit model A42 Outdoor unit power supply Single 208 230V 60 Hz Breaker size 30A Minimum circuit ampacity 26A Maximum rating of overcurrent protective device 40A Outdoor unit power supply 2 x Min AWG 10 Outdoor unit power supply earth 1 x Min AWG 10 Indoor unit Outdoor unit 3 x AWG 16 polar Indoor unit earth 1 x Min AWG 16 Remote controller Indoor unit 2 x AWG 22 Non polar Outdoor unit L1 L2 AC 208 230 V Indoor unit Outdoor unit S1 S2 AC 208 230 V Indoor unit Outdoor unit S2 S3 Remote controller Indoor unit 1 Use earth leakage breaker NV 2 Max 45 m 147 ft If AWG13 used Max 50 m 164 ft DC 24 V DC 12 V If AWG13 used and S3 separated Max 80m 262ft 3 The 10 m 30 ft wire is attached in the remote controller accessory Max 1500 ft IA s AO st ss WO 4 The figures are NOT always against the ground S3 terminal has DC 24 V against S2 terminal However between S3 and S1 thes
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28. install a filter drier simultaneously Be sure to use a filter drier for new refrigerant 2 Additional refrigerant charge When charging directly from cylinder Check that cylinder for R410A on the market is syphon type Charging should be performed with the cylinder of syphon stood vertically Refrigerant is charged from liquid phase 9 Service tools Use the below service tools as exclusive tools for R410A refrigerant Tool name Specifications Gauge manifold Only for R410A Use the existing fitting specifications Use high tension side pressure of 5 3MPa G or over Charge hose Only for R410A Use pressure performance of 5 09MPa G or over Electronic scale Gas leak detector Use the detector for R134a R407C or R410A Adaptor for reverse flow check Attach on vacuum pump Refrigerant charge base Refrigerant cylinder Only for R410A Top of cylinder Pink Cylinder with syphon Refrigerant recovery equipment OCH512 4 2 3 CAUTIONS FOR REFRIGERANT PIPING WORK New refrigerant R410A is adopted for replacement inverter series Although the refrigerant piping work for R410A is same as for R22 exclusive tools are necessary so as not to mix with different kind of refrigerant Furthermore as the working pressure of R410A is 1 6 times higher than that of R22 their sizes of flared sections and flare nuts are different Thickness of pipes Because the worki
29. x2 SW2 setting Code 20 display OFF 1 6 OCH512 57 10 10 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS 1 Function of switches The black square m indicates a switch position Action by the switch operation Switch No Function y P Effective timing ON OFF When compressor is operatin Forced defrost lt 1 Start Normal in heating Operation Me 9 Abnormal history clear Clear Normal Off or operating ON Refrigerant address When power supply ON setting ON 123456 14 Test run Operating OFF Under suspension Test run mode setting Heating Cooling No function weer No function Separate indoor outdoor unit power supplies Not used When power supply ON Pump down Normal Under suspension x1 Forced defrost should be done as follows Change the DIP SW1 1 on the outdoor controller board from OFF to ON Forced defrost will start by the above operation 1 if all these conditions written below are satisfied Heat mode setting 10 minutes have passed since compressor started operating or previous forced defrost finished Pipe temperature is less than or equal to 8 C 46 F Forced defrost will finish if certain conditions are satisfied Forced defrost can be done if above conditions are satisfied when DIP SW1 1 is chan
30. 01 1 1 41 0 1 0 00 17 o 1 0 00 02 ofololi 1 lo 00 18 11710 00 03 10 0110 00 19 0 01 1 00 04 0 1 0 1 1 lo 00 1A 1 0 1 00 05 1 1 o0 1 1 0 00 1B ojiji 00 06 olo ilili lo 00 1C 111 00 07 1 0 1 1 1 0 00 1D 0 1 1 1 1 0 00 1E 1 1 1 1 1 0 00 1F 0 Switch OFF 1 Switch ON 01010 0 0 1 00 20 SW4 SW9 SW10 Data display 1 00 0 0 1 00 21 1 2 0 1 01 1010 1 00 22 0 0 00 00 1 1 0 0 0 1 00 23 1 0 00 01 0 0 1 0 0 1 00 24 0 1 00 02 1 0 1 0 0 1 00 25 1 1 00 03 0 1 1 0 0 1 00 26 1 1 1 0 0 1 00 27 00 0 1 0 1 00 28 1 00 1 0 1 00 29 0 1 0 1 0 1 00 2A 1 1 0 1 0 1 00 2B 0 0 1 1 0 1 00 2C 1 0 1 1 0 1 00 2D 0 1 1 1 0 1 00 2E 1 1 1 1 0 1 00 2F 00 0 0 1 1 00 30 1 00 0 1 1 00 31 0 1 0 0 1 1 00 32 1 1 0 0 1 1 00 33 0 0 1 0 1 1 00 34 1 0 1 0 1 1 00 35 0 1 1 0 1 1 00 36 1 1 1 0 1 1 00 37 00 0 1 1 1 00 38 1 00 1 1 1 00 39 0 1 0 1 1 1 00 3A 1 1 0 1 1 1 00 3B 0 0 1 1 1 1 00 3C 1 0 1 1 1 1 00 3D 0 1 1 1 1 1 00 3E 1 1 1 1 1 1 00 3F OCH512 91 Indoor unit Model setting information Request code 162 Data display 0 0 See the table on the right Indoor unit Capacity setting information Request code 163 Data display 0 0 See the table on the right
31. 1 Make the circuit as shown above with Adaptor for external signal input PAC SC36NA 2 Turn SW1 to on for Low level sound priority mode Turn SW1 to off to release Low level sound priority mode and normal operation b Demand control Local wiring Demand control is available by external input In this mode power consumption is decreased within the range of usual 0 100 How to wire Basically the wiring is the same as a Connect an SW1 which is procured at field to the between Orange and Red 1 and 3 of the Adaptor for external signal input PAC SC36NA and insulate the tip of the brown lead wire It is possible to set it to the following power consumption compared with ratings by setting the SW7 1 2 SW7 1 SW7 2 WG Rion OFF OFF 0 Operation stop ON OFF 50 OFF ON 75 OCH512 60 lt Display function of inspection for outdoor unit gt The blinking patterns of both LED1 green and LED2 red indicate the types of abnormality when it occurs Types of abnormality can be indicated in details by connecting an optional part A Control Service Tool PAC SK52ST to connector CNM on outdoor controller board Display 1 Normal condition Outdoor controller board A Control Service Tool LED1 Green LED2 Red Error code Indication of the display Unit condition When the power is turned on Lighted Lighted Alternately blinking display When unit stops Lighted Not lighted Operation mode
32. 10 hours 110 Compressor Number of operation times at time of error 0 9999 100 times 111 Discharge temperature at time of error 37 327 F 112 Outdoor unit Liquid pipe 1 temperature TH3 at time of error 40 194 F 113 Outdoor unit Liquid pipe 2 temperature at time of error 40 194 F 114 Outdoor unit 2 phase pipe temperature TH6 attime oferror 38 190 F 115 116 Outdoor unit Outside air temperature TH7 at time of error 38 190 F 117 Outdoor unit Heatsink temperature TH8 at time of error 40 327 F 118 Discharge super heat SHd at time of error 0 327 F 119 Sub cool SC at time of error 0 234 F 120 Compressor Operating frequency at time of error 0 255 Hz 124 Outdoor unit at time of error 0 10 Step Fan output step 122 Outdoor unit at time of error T 0 _9999 tel lt Fan 1 speed Only for air conditioners with DC fan 123 Outdoor unit at time of eror E 0 _ 9999 om O is displayed if the air conditioner is a single Fan 2 speed Only for air conditioners with DC fan fan type 124 125 LEV A opening at time of error 0 500 Pulses 126 LEV B opening at time of error 0 500 Pulses 127 128 129 130 Thermo ON time until operation stops due to error 0 999 Minutes 131 132 Indoor Liquid pipe temperature at time of error 38 190 oF Average value of all indoor units is displayed if the air condi tioner consists of two or more indoor units twin triple quad 133 Indo
33. 14 Others Other errors 1 If the beeper does not sound again after the initial 2 beeps to confirm the self check start signal was received and the OPERATION INDICATOR lamp does not come on there are no error records 2 If the beeper sounds 3 times continuously beep beep beep 0 4 0 4 0 4 sec after the initial 2 beeps to confirm the self check start signal was received the specified refrigerant address is incorrect OCH512 26 10 4 SELF DIAGNOSIS ACTION TABLE lt Abnormalities detected when the power is turned on gt Note 1 Refer to indoor unit section for code P and code E Error Code Abnormal point and detection method Case Judgment and action No voltage is supplied to termi nal block TB1 of outdoor unit a Power supply breaker is turned off b Contact failure or disconnec tion of power supply terminal c Open phase L1 or L2 phase Electric power is not charged to power supply terminal of out door power circuit board a Contact failure of power sup ply terminal b Open phase on the outdoor power circuit board Disconnection of connector TABT or TABS Electric power is not supplied to outdoor controller circuit board a Disconnection of connector CNDC Disconnection of reactor DCL Disconnection of outdoor noise filter circuit board or parts fail ure in outdoor noise filter circuit board It is especially needed to check the resistance RS1 on the noise
34. 64 9 0 1 4 17 0 43 64 13 2 1 2 33 64 13 0 3 8 22 0 7 8 16 6 41 64 21 32 16 2 1 2 26 0 1 3 64 19 7 49 64 25 32 19 4 5 8 29 0 1 9 64 23 3 3 4 Tools for R410A The following table shows whether conventional tools can be used or not Tools and materials R410A tools Can R22 tools be used Gauge manifold Air purge refrigerant charge Tool exclusive for R410A Charge hose and operation check Tool exclusive for R410A Gas leak detector Gas leak check Tool for HFC refrigerant Refrigerant recovery equipment Collection of refrigerant Tool exclusive for R410A Refrigerant cylinder Refrigerant charge Tool exclusive for R410A Applied oil Apply to flared section Ester oil ether oil and alkylbenzene oil minimum amount Safety charger Prevent compressor malfunction Tool exclusive for R410A when charging refrigerant by spraying liquid refrigerant Charge valve Prevent gas from blowing out Tool exclusive for R410A x when detaching charge hose Vacuum pump Vacuum drying and air Tools for other refrigerants can A Usable if equipped purge be used if equipped with adop with adopter for rever ter for reverse flow check se flow Flare tool Flaring work of piping Tools for other refrigerants A Usable by adjusting can be used by adjusting flaring dimension flaring dimension Bender Bend the pipes Tools can be used for other refrigerants O Pipe cutter Cu
35. A42NHA5 BS i Connect to the outdoor power circuit board TABP2 NE gt 7 L1 L2 eee Gj Yi PLL LI Connect to the OANE DCL Reactor N1 Non connect Upper side Lower side N2 Non connect Connect to the outdoor power circuit board TABP1 Connect to the outdoor power circuit board CNAF 1 GND lo Connect to the outdoor power z 3 Earl cena Connect to the outdoor power circuit board TABN1 4 5 Not used circuit board TABN2 6 1 Control signal Connection and internal circuit diagram Tester check points of Active filter module Error condition Normal value reference Symptom when the unit is in trouble and lo open less than 1Q The unit does not operate can not be switched ON short 100kQ 1MQ The breaker operates anes open x1 The unit does not operate can not be switched ON U9 Abnormal stop 2 short 100kQ 1MQ O The breaker operates pan open x1 The unit does not operate can not be switched ON U9 Abnormal stop 2 short 100kQ 1MQ The breaker operates P and lo open KA The unit does not operate can not be switched ON U9 Abnormal stop 2 short 100kQ 1MQ The breaker operates L2 and lo open x1 The unit does not operate can not be switched ON U9 Abnormal stop 2 x1 The symptom when the uni a in open error condition is described to determine open error by tester check
36. D Request code display area Operation state Request code 0 Relay output state Power currently Displ Four l Solenoid val Data display isplay Sicsiiad t compressor Compressor our way valve Solenoid valve C 4 0 L Relay output state 1 ON Operation mode 2 ON Operation mode 3 ON ON pe 4 ON Display Operation mode 5 ON ON 0 STOP FAN 6 ON ON C COOL DRY 7 ON ON ON H HEAT 8 ON d DEFROST A ON ON Indoor unit Control state Request code 50 Data display Display State kl kl klk 0 Normal 1 Preparing for heat operation L Unit No 4 state 2 _ Unit No 3 state 3 _ Unit No 2 state 4 HeaterisON 5 ji 5 Anti freeze protection is ON Unit No 1 state 6 Overheat protection is ON 7 Requesting compressor to turn OFF F There are no corresponding units Outdoor unit Control state Request code 51 Data display State 0 0 O O Normal O O O 1 Preparing for heat operation O O O 2 Defrost Compressor Frequency control state Request code 52 Frequency control state Data display gt i Displa Discharge temperature Condensation temperature Anti freeze Heatsink temperature 0 0 pay overheat prevention overheat prevention protection control overheat prevention TL Frequency control state 0 Frequency control state D 1 Controlled 2 Controlled Frequency control state 3 Controlled Controlled 4 Controlled Display Current limit control 5 Controlled Controlled 0
37. Multi refrigerant system group control In the case of single refrigerant system the refrigerant address Up to 16 refrigerant systems 16 outdoor units can be con is 00 and no operation is required nected as a group by one remote controller To check or set the Simultaneous twin units belong to this category refrigerant addresses single refrigerant system 1 1 Twin Refrigerant Refrigerant Refrigerant Refrigerant Refrigerant Refrigerant address address address address address 00 address 00 Outdoor unit Indoor unit 01 Remote controller Outdoor unit 15 Outdoor unit Indoor unit 01 02 Outdoor unit Indoor unit 01 01 Outdoor unit Indoor unit 01 00 Outdoor unit Indoor unit 01 Remote controller Indoor unit 02 Indoor unit 01 Remote controller OCH512 73 11 2 GUIDE FOR OPERATION CONDITION Inspection item gt 5 Breaker Good Retightened 8 8 Terminal block Outdoor Unit Good Retightened 5 se Indoor Unit Good Retightened 3 Insulation resistance MQ a Voltage V Cam Accumulated operating time Time Number of ON OFF times Times pressor Current A e Refrigerantheat exchanger temperature COOL HEAT op Ja 8 Relrigerant discharge temperature COOL HEAT F 5 Air outside air temperature COOL HEAT F S e Air discharge temperature COOL HEAT F
38. No currentlimit I 6 Controlled Controlled 1 Primary current limit control is ON 7 Controlled Controlled Controlled 2 Secondary current limit control is ON 8 Controlled 9 Controlled Controlled A Controlled Controlled b Controlled Controlled Controlled C Controlled Controlled d Controlled Controlled Controlled E Controlled Controlled Controlled F Controlled Controlled Controlled Controlled OCH512 88 Fan control state Request code 53 Data display g o x Fan step correction value by heatsink temperature overheat prevention control Fan step correction value by cool condensation temperature overheat prevention control Display Correction value minus 1 0 0 1 1 2 2 Actuator output state Request code 54 Data display o ol sk L Actuator output state Actuator output state Actuator output state D Actuator output state Display SV1 Four way valve Compressor Compressor Display 52C Sv2 ss warming up 0 0 1 ON 1 ON 2 ON 2 ON 3 ON ON 3 ON ON 4 ON 4 ON 5 ON ON 5 ON ON 6 ON ON 6 ON ON 7 ON ON ON 7 ON ON ON 8 ON 9 ON ON A ON ON b ON ON ON C ON ON d ON ON ON E ON ON ON F ON ON ON ON Error content U9 Request code 55 Data disp
39. When compressor is warming up Lighted Not lighted 08 etc When unit operates Lighted Lighted C5 H7 etc 2 Abnormal condition Indication Outdoor controller board Detailed Contents Inspection method LED1 Green LED2 Red 1 blinking 2 blinking Check if connector 63H on the outdoor controller board Connector 63H is open is not disconnected Check continuity of pressure switch 63H by tester 2 blinking 1 blinking Miswiring of indoor outdoor unit it i PE b gji b g connecting wire excessive number of Check if indoor outdoor connecting wire is connected correctly indoor units 4 units or more Check if 4 or more indoor units are connected to outdoor unit Miswiring of WA unit Check if noise entered into indoor outdoor connecting wire connecting wire converse wiring or disconnection or power supply Re check error by turning off power and on again Startup time over 2 blinking een Check if indoor outdoor connecting wire is connected correctly detected by indoor unit Check if noise entered into indoor outdoor connecting wire or Indoor outdoor unit communication power supply s ak is Check if noise entered into indoor outdoor controller board Indoor outdoor unit communication Re check error by turning off power and on again error signal receiving error is detected by outdoor unit Indoor outdoor unit communication error transmitting error is detec
40. can be set up Set the operation mode cooling heating using SW4 2 Turn on SW4 1 to start test run with the operation mode set by SW4 2 oN Turn off SW4 1 to finish the test run OFF m a lt There may be a faint knocking sound around the machine room after power is supplied but this is not a problem with the product because the linear expansion valve is just moving to adjust opening pulse Stop Operation lt There may be a knocking sound around the machine room for several seconds after compressor Cooling Heating starts operating But this is not a problem with product because the check valve itself generates PUZ only the sound because pressure difference is small in the refrigerant circuit Note The operation mode cannot be changed by SW4 2 during test run To change test run mode stop the unit by SW4 1 change the operation mode and restart the test run by SW4 1 OCH512 19 10 TROUBLESHOOTING 10 1 TROUBLESHOOTING lt Error code display by self diagnosis and actions to be taken for service summary gt Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit Actions to be taken for service which depends on whether or not the trouble is reoccurring at service are summarized in the table below Check the contents below before investigating details Unit conditions at service Error code Actions
41. changes to 00 01 02 03 04 and AL each time a button is pressed When the refrigerant address and unit number are confirmed by pressing the MODE button the corresponding indoor unit will start fan operation This helps you find the location of the indoor unit for which you want to perform function selection However if 00 or AL is selected as the unit number all the indoor units corresponding to the specified refrigerant address will start fan operation Z m u NEI 7 Example When the refrigerant address is set to 00 and the unit number is 02 00 refrigerant address Outdoor unit Indoor unit Unit number 01 Unit number 02 N Designate operation Remote controller Fan draft When grouping different refrigerant systems if an indoor unit other than the one to which the refrigerant address has been set to perform fan operation there may be another refrigerant address that is the same as the specified one In this case check the DIP switch of the outdoor unit to see whether such a refrigerant address exists number may be incorrect so repeat steps and to set the correct ones Select the mode number Press the TEMP buttons v D and CA to set the desired mode number Only the selectable mode numbers can be selected Select the setting content for the selected mode Press the MEN
42. exchanger becomes cold so the blower is stopped The up down vane will be automatically set to horizontal blow in order to prevent cold air from directly blowing out to human body The display will turn into STANDBY when DEFROST operation ends 43 Phone Calls From Customers How to Respond The room cannot be cooled or heated sufficiently Check the set temperature of remote controller The outdoor unit cannot be operated if the set temperature is not appropriate The outdoor unit operates in the following modes COOL When the set temperature is lower than the room temperature HEAT When the set temperature is higher than the room temperature Check if filters are not dirty and clogged If filters are clogged the airflow amount will be reduced and the unit capacity will be lowered See the instruction manual that came with the product for how to clean the filters Check there is enough space around the air conditioner If there are any obstacles in the air intake or air outlet of indoor outdoor units they block the airflow direction so that the unit capacity will be lowered Sound comes out from the air conditioner A gas escaping sound is heard sometimes This is not a malfunction This is the sound which is heard when the flow of refrigerant in the air conditioner is switched Acracking sound is heard sometimes This is not a malfunction This is the sound whic
43. filter circuit board Defective outdoor power circuit board Defective outdoor controller cir cuit board Check following items a Power supply breaker b Connection of power supply terminal block TB1 c Connection of power supply terminal block TB1 Check following items a Connection of power supply terminal block TB1 b Connection of terminal on outdoor power circuit board Disconnection of connector TABT or TABS Refer to 10 9 Check connection of the connector CNDC on the outdoor controller circuit board Refer to 10 9 Check connection of L1 and L2 on the active filter module ACTM Refer to 10 9 a Check connection of outdoor noise filter circuit board b Replace outdoor noise filter circuit board Refer to 10 9 Replace outdoor power circuit board Replace controller board When items above are checked but the units cannot be repaired 63H connector open Abnormal if 63H connector circuit is open for 3 minutes continuously after power supply 63H High pressure switch OCH512 Disconnection or contact failure of 63H connector on outdoor controller circuit board Disconnection or contact failure of 63H 63H is operating due to defective parts Defective outdoor controller circuit board Check connection of 63H connector on outdoor controller circuit board Refer to 10 9 Check the 63H side of connecting wire Check contin
44. filters Clean the air filters Press the FILTER button on the remote controller twice to clear FILTER from the display See the operation manual that came with the product for how to clean the filters Display time of FILTER depends on the model Long life filter 2500 hrs Standard filter 100 hrs STANDBY is displayed on the screen This is displayed when the unit starts HEAT operation when the thermostat puts the compressor in operation mode or when the outdoor unit ends DEFROST operation and returns to HEAT operation The display will automatically disappear around 10 minutes later While STANDBY is displayed on the remote controller the airflow amount will be restricted because the indoor unit s heat exchanger is not fully heated up In addition to that the up down vane will be automatically set to horizontal blow in order to prevent cold air from directly blowing out to human body The up down vane will return to the setting specified by the remote controller when STANDBY is released DEFROST is displayed on the screen No air comes out of the unit OCH512 The outdoor unit gets frosted when the outside temperature is low and the humidity is high DEFROST indicates the DEFROST operation is being performed to melt this frost The DEFROST operation ends in around 10 minutes at most 15 minutes During the DEFROST operation the indoor unit s heat
45. housing gt Fan motor CNF1 CNF2 Valve bed e Linear expansion valve LEV A e Thermistor lt Outdoor pipe gt TH3 e Thermistor lt Shell gt TH32 e Thermistor lt Outdoor 2 phase pipe Outdoor gt TH6 7 Compressor e High pressure switch 63H Br A MO 4 way valve coil 2184 5 Remove the terminal cover and disconnect the compressor lead wire 6 Remove an electrical parts box fixing screw 4 x 10 and detach the electrical parts box by pulling it upward The electrical parts box is fixed with 2 hooks on the left and 1 lan hook on the right Terminal cover lt Cover panel Front Cover panel fixing screws OCH512 93 OPERATING PROCEDURE PHOTOS 4 s he thermistor MELS men pipe gt TH6 Photo 4 fe Salt ove the service panel See Figure 1 i 2 Remove the top panel See Figure 1 Controller EE a phase pipes 3 Disconnect the connectors TH6 and TH7 red on the circuit board controller circuit board in the electrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box 5 Pull out the thermistor lt Outdoor 2 phase pipe gt TH6 from the sensor holder Note In case of replacing thermistor lt Outdoor 2 phase pipe gt TH6 replace it together with thermistor lt Outdoor gt TH7 since they are combined together Refer to No 5 below to remove thermistor lt Outdoor gt C B 5 Removing the thermistor lt Outdoo
46. lt Function Setup gt MF1 MF2 Fan Motor TABN1 N2 N Connection Terminal lt DC Voltage gt Sw9 Switch 21S4 Solenoid Valve Four Way Valve DS2 DS3 Diode Bridge SWP Switch lt Pump Down gt 63H High Pressure Switch IPM Power Module CN31 Connector lt Emergency Operation gt TH3 Thermistor lt Outdoor Pipe gt N F Noise Filter Circuit Board LED1 LED2 LED lt Operation Inspection Indicators gt TH6 Thermistor lt Outdoor 2 Phase Pipe gt LI LO Connection Lead lt L1 Phase gt SS Connector lt Connection for Option gt TH7 Thermistor lt Outdoor gt NI NO Connection Lead lt L2 Phase gt CNM Connector lt A Control Service Inspection Kit gt TH8 Thermistor lt Heatsink gt El E2 Connection Terminal lt Ground gt CNMNT Connector lt Connected to Optional M NET Adapter Board gt TH32 Thermistor lt Shell gt 52C 52C Relay CNVMNT Connector lt Connected to Optional M NET Adapter Board gt LEV A Electronic Expansion Valve C B Controller Circuit Board CNDM Connector lt Connected for Option Contact Input gt DCL Reactor F1 F4 Fuse lt T6 3AL250V gt CN3S Connector lt Connected for Option gt CY1 CY2 Capacitor SW1 Switch lt Forced Defrost Defect History Record CN51 Connector lt Connected for Option Signal output gt ACTM Active Filter Module Reset Refrigerant Address gt X51X52 Relay CB Main Smoothing Capacitor SW4 Switch lt Test Operation gt P B Power Circuit Board SW5 Switch lt Function Switch gt TABU V W Connection Terminal lt U V W Phase gt SW6 Switch lt M
47. on the outdoor power circuit board Disconnection or loose connection of CN2 on the outdoor power circuit board Check the facility of power supply Correct the wiring U V W phase to compressor Refer to 10 9 Outdoor power circuit board Check CN52C wiring Replace ACT module Replace outdoor power circuit board Check CNAF wiring Replace outdoor noise filter circuit board Check CN5 wiring on the outdoor power circuit board Refer to 10 9 Check CN2 wiring on the outdoor power circuit board Refer to 10 9 Compressor overcurrent interruption When compressor locked Abnormal if overcurrent of DC bus or compressor is detected within 30 seconds after compressor starts operating Stop valve is closed Decrease of power supply voltage Looseness disconnection or converse of compressor wiring connection Defective compressor Defective outdoor power board Dip Switch setting for selecting model is incorrect on the outdoor power circuit board Open stop valve Check facility of power supply Correct the wiring U V W phase to compressor Refer to 10 9 Outdoor power circuit board Check compressor Refer to 10 6 Replace outdoor power circuit board Check that the Dip Switch setting is correct on the outdoor power circuit board by referring to Model Select in 1 Function of switches in 10 10 Current sensor error e Abnormal if curre
48. opened detected as abnormal when condenser completely evaporator pipe temperature is not in A Control Service Tool SW2 setting heating range within 20 minutes OFF Check converse connection of extension Note 3 It takes at least 27 minutes to pipe or converse wiring of indoor outdoor detect abnormality unit connecting wire Note 4 It excludes the period of defrosting Detection restarts when defrosting mode is over Heating range 3 deg 5 4 F Condenser Evaporator temperature TH5 intake temperature TH1 lt M NET communication error gt Note Indoor unit in the text indicates M NET board in outdoor unit Error Code Abnormal point and detection method Case Judgment and action Address duplicate definition There are 2 or more same Search the unit with same address as abnormali This error is displayed when transmission address of controller of out ty occurred If the same address is found turn off from the units of same address is detected door unit indoor unit FRESH the power supply of outdoor unit and indoor unit Note The address and attribute displayed MASTER or LOSSNAY and FRESH MASTER or LOSSNAY at the same at remote controller indicate the con Noise has entered into trans time for 2 minutes or more after the address is troller that detected abnormality mission signal and signal was Corrected and turn the power on again transformed Chec
49. operating at the time designated if ON timer has been set before Check if any operations are ordered by distant control system or the central remote controller While CENTRALLY CONTROLLED INDICATOR is displayed on the remote controller the air conditioner is under the control of external directive There might be a case that CENTRALLY CONTROLLED INDICATOR will not be displayed Check if power is recovered from power failure black out The units will automatically start operating when power is recovered after power failure black out occurs This function is called auto recovery feature from power The air conditioner stops even though any buttons on the remote controller are not pressed OCH512 Check if you set ON OFF timer The air conditioner stops operating at the time designated if OFF timer has been set before Check if any operations are ordered by distant control system or the central remote controller While CENTRALLY CONTROLLED INDICATOR is displayed on the remote controller the air conditioner is under the control of external directive 45 There might be a case that CENTRALLY CONTROLLED INDICATOR will not be displayed Phone Calls From Customers How to Respond A white mist is expelled from the indoor unit This is not a malfunction This may occur when the operation gets started in the room of high humidity Water or moisture is e
50. pins 1 2 Cooling OFF Turning the main power supply on will start the emergency operation 4 Releasing emergency operation Turn the main power supply off SW4 Set the emergency operation switch SWE on indoor controller board to OFF ON Heating Set the shorting pins of emergency operation connector CN31 on outdoor controller PUZ only board to OFF Set SW4 2 on outdoor controller board as shown in the right 1 2 Cooling kif shorting pins are not set on emergency operation connector CN31 the setting remains OFF OCH512 52 5 Operation data during emergency operation During emergency operation no communication is performed with the indoor unit so the data items needed for operation are set to the following values Operation mode Operation data Remarks COOL HEAT Intake temperature TH1 27C 81 F 20 5 69 F Indoor fluid pipe temperature TH2 5C 41 F 45C 113 F Indoor 2 phase pipe temperature TH5 5C 41 F 50 C 122 F Set temperature 25C 77 22 C 72 F Outdoor fluid pipe temperature TH3 45 C 113 F 5C 41 F Outdoor 2 phase pipe temperature TH6 50 C 122 F 5C 41 F Outdoor air temperature TH7 35C 95 F 7C 45 F Temperature difference code 5 5 intake temperature set temperature ATj Discharge super heat SHd Sub cool SC x1 If the thermistor temperature data i
51. pressing the remote controller After cancelling to select function from the remote Normal operation operation switch the OPERATION controller the remote controller operation switch will display is appeared but it will be not be accepted for approx 30 seconds turned off soon OCH512 37 Phenomena Factor Countermeasure 4 Even controlling by the IR wireless remote controller no beep is heard and the unit does not start operat ing Operation display is indicated on IR wireless remote controller The pair number settings of the IR wireless remote controller and indoor controller board are mismatched Check the pair number settings When operating by the IR wireless remote controller beep sound is heard however unit does not start operating No operation for 2 minutes at most after the power supply ON Hand held remote controller operation is prohibited lt Remote controlling adaptor is connected to CN32 on the indoor controller board e Hand held remote controller operation is prohibited by centralised controller etc since it is connected to MELANS Refer to factor of phenomena No 2 on previous page Normal operation Normal operation Check the details of phenomena No 2 on previous page Remote controller display works normally and the unit performs cool ing operation however the capacity cannot be fully obtained The air does not cool well ORefrigerant shortage
52. quality and reliability of the work done It also helps to speed up the installation time OCH512 6 4 SPECIFICATIONS Service Ref PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS Power supply Single 60Hz 208 230V MCA MOCP Breaker size External finish Munsell 3Y 7 8 1 1 Heat exchanger Plate fin coil Defrost method Reverse cycle Crankcase heater Compressor Hermetic Model ANB33FCTMT Motor output 2 5 R L A 20 L R A 27 5 Starter type Inverter Fan drive x No Propeller fan x 2 Fan motor output 0 086 0 086 Fan motor 0 40 0 40 Airflow 100 3530 Sound level Cooling 51 Heating Protection devices HP switch Comp shell thermo Dimension 950 330 30 1350 37 12 32 13 1 3 16 w D H w D H 53 5 32 Weight Refrigerant Charged Control Linear expansion valve Oil Ether FV50S Charged 1 4 45 Refrigerant Pipe size OD 9 52 piping Liquid 3 8 Pipe size OD 15 88 Gas 5 8 Connection method Indoor Flared Connection method Outdoor Flared Height difference m Max 30 IU OU ft Max 100 Piping length m Max 50 ft OCH512 Max 165 5 DATA
53. set to AL all the indoor units in same refrigerant system start performing fan operation simultaneously If a unit number that cannot be recognized by the unit is entered 3 beeps of 0 4 seconds will be heard Reenter the unit number setting If the signal was not received by the sensor you will not hear a beep or a double ping sound may be heard Reenter the unit number setting Select a mode Press the temp button to set a mode Press 24 to turn on the function that raises the set temperature by 4 degree during heat operation Direct the IR wireless remote controller toward the sensor of the indoor unit and press the button The sensor operation indicator will blink and beeps will be heard to indicate the current setting number Current setting number 1 1 beep one second 2 2 beeps one second each 3 3 beeps one second each If a mode number that cannot be recognized by the unit is entered 3 beeps of 0 4 seconds will be heard Reenter the mode number If the signal was not received by the sensor you will not hear a beep or a double ping sound may be heard Reenter the mode number Select the setting number Press the temp button to select the setting number 02 Not available Direct the IR wireless remote controller toward the receiver of the indoor unit and press the mm button The sensor operation indicator will blink and beeps will be heard to indicate the setting number Setting number
54. the number of indoor units that are connected to one outdoor unit If EA is detected lt Turn the power off once and on again to check Replace outdoor controller circuit board indoor controller board or indoor power board if abnormality occurs again Check if refrigerant addresses SW1 3 to SW1 6 on outdoor controller circuit board arel overlapping in case of group control system Check transmission path and remove the cause x The descriptions above M are for EA Eb and EC lt Abnormalities detected while unit is operating gt Error Code Abnormal point and detection method Case Judgment and action High pressure High pressure switch 63H operated Abnormal if high pressure switch 63H oper ated during compressor operation 4 15 MPa 602PSIG 63H High pressure switch Short cycle of indoor unit Clogged filter of indoor unit Decreased airflow caused by dirt of indoor fan Dirt of indoor heat exchanger Locked indoor fan motor Malfunction of indoor fan motor Defective operation of stop valve Not full open Clogged or broken pipe Locked outdoor fan motor Malfunction of outdoor fan motor D Short cycle of outdoor unit Dirt of outdoor heat exchanger Decreased airflow caused by defective inspection of outside temperature thermistor It detects lower temperature than actual temperature Disconnection or contact failure of connector 63H
55. unit No room temperature detection position Select setting No 03 remote controller fixed Use and Example Selecting room temperature detection position Enter the setting Press End function display x Press and at the same time The above procedure must be carried out only if changes are necessary OCH512 77 Operating Procedure Check the setting items provided by function selection If settings for a mode are changed by function selection the functions of that mode will be changed accordingly Check all the current settings according to steps to D fill in the Check column in Table 1 then change them as necessary For initial settings refer to the indoor unit s installation manual Switch off the remote controller lt Hold down the FILTER C_D mode is 15 to 28 and TEST buttons simultaneously for at least 2 seconds SUNCTION Will start to blink then the remote controller s display content will change as shown below Refrigerant address display section Set the outdoor unit s refrigerant address Press the GX CLOCK buttons C Jand A D to select the desired refrigerant address The refrigerant address changes from 00 to 15 This operation is not possible for single refrigerant systems If the unit stops after 2 cenon blinked for 2 seconds or 88 blinks in the room temperature display ar
56. valve bed fixing screws 4 x 10 4 ball valve and stop valve fixing screws 5 x 16 then remove the valve bed 4 Remove 4 right side panel fixing screw 5 x 12 in the rear of the unit and then remove the right side panel 5 Remove the linear expansion valve See Photo 7 6 Recover refrigerant 7 Remove the welded part of linear expansion valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remov ing the right side panel Note 3 When installing the linear expansion valve cover it with a wet cloth to prevent it from heating 250 F or more then braze the pipes so that the inside of pipes are not oxidized Photo 7 Linear expansion valve coil LEV A 4 way valve coil fixing screw 4 way way 4 way valve Linear expansion valve coil valve OCH512 95 OPERATING PROCEDURE PHOTOS 10 Removing the high pressure switch 63H 1 Remove the service panel See Figure 1 2 Remove the top panel See Figure 1 3 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit and remove the right side panel 4 Pull out the lead wire of high pressure switch 5 Recover refrigerant 6 Remove the welded part of high pressure switch Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remov ing the right side panel Note 3 When installing the high press
57. 1 For high humidity OCH512 Single 3 phase Heat pump cooling only Single phase Heat pump Cooling only 3 phase Peal pump Cooling only 90 Outdoor unit switch setting display SW1 to SW10 except SW3 Request codes 73 to 82 0 Switch OFF 1 Switch ON 0 Switch OFF 1 Switch ON at T e a Data display 1 a 4 Data display 00 0 0 0 0 00 00 01010 0 00 00 1 OJo 0 0 0 00 01 1 0 0 0 00 01 0 1 0 0 0 0 00 02 0 1 0 0 00 02 1 1 0 0 0 0 00 03 1 1 0 0 00 03 0 0 1 0 0 0 00 04 0 0 1 0 00 04 1 0 1 0 0 0 00 05 1 0 1 0 00 05 0 1 1 0 0 0 00 06 0 1 1 0 00 06 1 1 1 0 0 0 00 07 1 1 1 0 00 07 00 0 1 0 0 00 08 01010 1 00 08 1 00 1 0 0 00 09 1 0 0 1 00 09 0 1 0 1 0 0 00 OA 0 1 0 1 00 OA 1 1 0 1 0 0 00 Ob 1 1 0 1 00 Ob 0 0 1 1 0 0 00 OC 0 0 1 1 00 OC 1 0 1 1 0 0 00 Od 1 0 1 1 00 Od 0 1 1 1 0 0 00 OE 0 1 1 1 00 OE 1 1 1 1 0 0 00 OF 1 1 1 1 00 OF 00 0 0 1 0 00 10 1 ofofojfi1fo 00 11 A I 0 7 o lo 1 0 00 12 0 Switch OFF 1 Switch ON WENKEN 00 13 Data display 07 0 1 0 1 0 00 14 1 o0 1 0 1 0 00 15 ojojo 00 00 o lililol lilo 00 16 1 0 0 00
58. 1 to ON if the unit is stopped However even if the unit is stopped and SW1 1 is set to ON less than three minutes after the compressor stops the refrigerant collecting operation cannot be performed Wait until compressor has been stopped for three minutes and then set SW1 1 to ON again Because the unit automatically stops in about two to three minutes when the refrigerant collecting operation is completed LED1 off LED2 lit be sure to quickly close the gas stop valve If LED1 is lit and LED2 is off and the outdoor unit is stopped refrigerant collection is not properly performed Open the liquid stop valve completely and then repeat step after three minutes have passed If the refrigerant collecting operation has been completed normally LED1 off LED2 lit the unit will remain stopped until the power supply is turned off Turn off the power supply circuit breaker Note that when the extension piping is very long with large refrigerant amount it may not be possible to perform a pump down operation N Warning When pumping down the refrigerant stop the compressor before disconnecting the refrigerant pipes The compressor may burst if air etc get into it 2 Refrigerant pipe airtight testing method 1 Connect the testing tools e Make sure the stop valves are closed and do not open them Add pressure to the refrigerant lines through the service port of the liquid stop valve 2 Do not add pressure to the speci
59. 10 EAO 9ExZ L Z w c rey s q ny x gutho gt KAA lt 8 S 2 gt 99 care do aen mmm NI 5 NA V ASZ oeds MOS gt lc wi NJAA Ne Se ee ae ae zak ie JS Nollwanno 3 WE WOLU WUL UIN ee L IN m _ i S Ios a See Z oye av opis a E 1 Brey Hog uonepuno s1yblay Hog uonepunoj gt w le Ose 8 lt 8 L 9 gt SL1 lt 8 S E2 gt 009 lt Q 9 gt S 33 lt 8 M gt 0 LIN 10g uonepuno3 lou payojou p deus N Z y lul Ay Joy WO Q pue Jee UBL Juoi Suono uIp p WO1 epew aqueo Suolno uuo2o uum pue Buidid Aileoo p seuoind ag snw sJoysem pue sijog slloq lt 8 EM gt 0 LIN uollepunoj UHA w pun ay omnes aseald oja syenuew uolj lie su ou u UA ese sjrejop enoed yo uoneuerdx3 eydwexe diseq e smoys mojag weJbeip ou wesBelp mojaq ay u UMOUS are S8399 BOIAIAS JO p p u eoeds jo suoisuawiq 512 SNOILOFHIG ONIHIM ONIdId P S1108 NOILVONNOJ AOVdS 39IAd3S pun our puna 39VdS 33811 5 O 7 WIRING DIAGRAM PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS LEGEND SYMBOL NAME SYMBOL NAME SYMBOL NAME TB1 Terminal Block lt Power Supply Indoor Outdoor gt TABS T Connection Terminal lt L1 L2 Phase gt SW7 Switch lt Function Setup gt MG Motor for Compressor TABP1 P2 P Connection Terminal lt DC Voltage gt SW8 Switch
60. 132 Open short circuit of comp shell thermistor TH32 Abnormal if open 3 C 37 F or less or short 217 C 422 F or more is detected during compressor operation Detection is inoperative for 10 minutes of compressor starting process and for 10 minutes after and during defrosting OCH512 Disconnection or contact failure of connector TH32 on the outdoor controller circuit board Defective thermistor Defective outdoor controller circuit board 29 Check connection of connector TH32 on the outdoor controller circuit board Check breaking of the lead wire for thermistor TH32 Refer to 10 9 Check resistance value of thermistor TH32 or temperature by microprocessor Thermistor TH32 Refer to 10 6 SW2 on A Control Service Tool Refer to 10 10 Replace outdoor controller board Error Code Abnormal point and detection method Case Judgment and action U4 TH3 5105 TH6 5107 TH7 5106 TH8 5110 Open short of outdoor unit thermistors TH3 TH6 TH7 and TH8 Abnormal if open or short is detected during compressor operation Open detection of thermistors TH3 and TH6 is inoperative for 10 seconds to 10 minutes after compressor starting and 10 minutes after and during defrosting Check which unit has abnormality in its thermistor by switching the mode of SW2 PAC SK52ST Refer to 10 10 Thermistors Disconnection or contact failure of connector
61. 3 TH6 TH7 and TH32 on outdoor controller board and conn ector CN3 on outdoor power board are not disconnected Measure resistance value of outdoor thermistors 6 blinking Abnormality of heatsink temperature Check if indoor outdoor units have a short cycle on their air ducts Measure resistance value of outdoor heatsink thermistor TH8 7 blinking Abnormality of voltage Check looseness disconnection and converse connection of compressor wiring Measure resistance value among terminals on compressor using a tester Check the continuity of contactor 52C Check if power supply voltage decreases Check the wiring of CN52C Check the wiring of CNAF 1 blinking Abnormality of room temperature thermistor TH1 Abnormality of pipe temperature thermistor Liquid TH2 Abnormality of pipe temperature thermistor Condenser Evaporator TH5 Check if connectors CN20 CN21 CN29 and CN44 on indoor controller board are not disconnected Measure resistance value of indoor thermistors 2 blinking Abnormality of drain sensor DS Float switch connector open FS Indoor drain overflow protection Check if connector CN31 CN4F on indoor controller board is not disconnected Measure resistance value of indoor thermistors Measure resistance value among terminals on drain pump using a tester Check if drain pump works Check drain function 3 blinking Freezing cooling over
62. 42NHA5 Phase Single Cycle 60Hz Voltage 230V Current o 2 0 s 2 tx Discharge pressure Suction pressure Discharge temperature Condensing temperature Suction temperature Ref Pipe length Discharge pressure Suction pressure Discharge temperature Condensing temperature Suction temperature Ref Pipe length Intake air temperature DB Intake air temperature WB Discharge air temperature DB Intake air temperature DB Intake air temperature WB Intake air temperature DB Intake air temperature WB Discharge air temperature DB Intake air temperature DB Intake air temperature WB OCH512 5 3 2 Cooling only Representative matching PLA A42BA4 COOLING Capacity 42 000 Input 4 600 Indoor unit model PLA A42BA4 Phase Single Cycle 60Hz Voltage 230V Current 1 00A Outdoor unit model PUY A42NHA5 Electrical circuit Phase Single Cycle 60Hz Voltage 230V Current 20 4A Discharge pressure Suction pressure Discharge temperature Condensing temperature Suction temperature Ref Pipe length Discharge pressure gt 2 S lt S 2 a Suction pressure Discharge temperature Condensing temperature Suction temperature Ref Pipe length
63. 5 32 360 0 182 C When the temperature is 100 F or more hundreds digit tens digit and ones digit are displayed by turns Number of defrost cycles 0 FFFE 0 FFFE in hexadecimal notation When more than FF in hex 255 in decimal the number is displayed in order of 16 s and 167s and 16 s and 16s places Example When 5000 cycles 0 5 secs 0 5 secs 9 04 gt 2 secs 2 cycles Input current of outdoor unit 0 500 When it is 100 or more hundreds digit tens digit and ones digit are displayed by turns Targeted operation frequency 0 255 0 255 When it is 100Hz or more hundreds digit tens digit and ones digit are displayed by turns OCH512 DC bus voltage 180 370 180 370 When it is 100V or more hundreds digit tens digit and ones digit are displayed by turns SW2 setting Display detail The black square m indicates a switch position Explanation for display Capacity save 0 100 When air conditioner is connected to M NET and capacity save mode is demanded 0 100 is displayed When there is no setting of capacity save 100 is displayed 0 100 When the capacity is 100 hundreds digit tens digit and ones digit are displayed by turns Example When 100 0 5secs 0 5secs 2 secs 00 gt
64. 5 Wireless pair No indoor control board side setting Referto 13 2 1 Detail Contentsin Request Code _ 166 Indoor unit SW5 information Undefined _ 167 189 190 Indoor unit Microprocessor version information Examples Ver 5 01 0501 Ver 191 Indoor unit Microprocessor version information sub No Auxiliary information displayed after version information 6 Examples Ver 5 01 A000 A000 192 764 765 Stable operation Heat mode This request code is not provided to collect data It is used to fix the operation state 766 Stable operation Cool mode This request code is not provided to collect data It is used to fix the operation state This request code is not provided to collect data It is used to cancel the operation state that has been 767 Stable operation cancellation fixed by request codes 765 and 766 OCH512 87 13 2 1 Detail Contents in Request Code Example Request code 004 MENTERNE Discharge temperature 156 F MHI EN HL i i 5 Refrigerant address 00 mm Hit A Mode display B Refrigerant address C Data display area
65. 5 Unit mm inch PUY A42NHA5 BS Ball valve de Service port Outdoor heat exchanger Strainer check i f I Strainer 100 Thermistor Refrigerant GAS pipe LO J gt TH6 15 88mm 5 8 Ly l I 4 f Thermistor Service port lt 4 r i lt High pressure II TH3 check 1 protect switch a En i Ba Accumulator TH32 or Distributor Compressor Refrigerant LIQUID pipe T 9 52mm 3 8 a Strainer Strainer 100 100 Stop valve with service port OCH512 Linear expansion valve Refrigerant flow in cooling 18 1 Refrigerant collecting pump down Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit Supply power circuit breaker When power is supplied make sure that CENTRALLY CONTROLLED is not displayed on the remote controller If CENTRALLY CONTROLLED is displayed the refrigerant collecting pump down cannot be completed normally Start up of the indoor outdoor communication takes about 3 minutes after the power circuit breaker is turned on Start the pump down operation 3 to 4 minutes after the power circuit breaker is turned ON After the liquid stop valve is closed set SW1 1 on the control board of the outdoor unit to ON The compressor outdoor unit and ventilators indoor and outdoor units start operating and refrigerant collecting operation begins LED1 and LED2 on the control board of the outdoor unit are lit Only set SW1
66. 833 or 6832 blinks Transmission is not possible Error display 3 ERC and the number of data errors are displayed Data error has occurred RL ERC ERROR CODE There might be noise or interference on the transmission path or the indoor unit The number of data errors is the difference between the number of bits sent from or other remote controllers are defective Check the transmission path and other the remote controller and the number actually transmitted through the transmis controllers sion path If such a problem is occurring the transmitted data is affected by noise etc Check the transmission path I SELF CHECK 5 I ZELF CHECK I ai i mg I I c When the number of data errors is 02 Transmission data from remote controller nin rin Transmission data on transmission path ni rin To cancel remote controller diagnosis Press the CHECK button for 5 seconds or more Remote controller diagnosis will be cancelled PLEASE WAIT and operation lamp will blink After approximately 30 seconds the state in effect before the diagnosis will be restored OCH512 24 10 3 4 Malfunction diagnosis method by IR wireless remote controller lt ln case of trouble during operation gt When a malfunction occurs to air conditioner both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop lt Malfunction diagnosis method at maintenance service gt
67. B482 PCA A42KA5 PCA A42KA5 TH OCH501 OCB501 PEAD A42AA4 PEAD A42AA4 HWEO905A 2 1 ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal all supply circuits must be disconnected 2 SAFETY PRECAUTION Preparation before the repair service e Prepare the proper tools Prepare the proper protectors e Provide adequate ventilation After stopping the operation of the air conditioner turn off the power supply beaker Discharge the condenser before the work involving the electric parts Precautions during the repair service Do not perform the work involving the electric parts with wet hands Do not pour water into the electric parts Do not touch the refrigerant Do not touch the hot or cold areas in the refrigerating cycle e When the repair or the inspection of the circuit needs to be done without turning off the power exercise great caution not to touch the live parts OCH512 2 2 2 CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use new refrigerant pipes In case of using the existing pipes for R22 be careful with the followings Be sure to clean the pipes and make sure that the insides of the pipes are clean Change flare nut to the one provided with this product Use a newly flared pipe Avoid using thin pipes Use a vacuum pump with a reverse flow check valve Vacu
68. C 122 F 70kQ 60C 140 F 48kQ 70C 158 F 34kQ 80C 176 F 24kQ 90C 194 F 17 kQ 100 C 212 F 13 0kQ 110 C 230 F 9 8kQ OCH512 49 50 Q 30 D O ka s D 220 10 20 10 0 10 20 30 40 50 C 4 14 32 50 68 86 104122 F Temperature 200 150 D O 100 wn en 50 25 50 75 100110125 C 77 122 167 212 230 257 F Temperature 500 400 J 300 8 8 2 200 100 25 50 75 100 120 C 77 122 167 212 248 Temperature Linear expansion valve 1 Operation summary ot the linear expansion valve Linear expansion valve opens closes through stepping motor after receiving the pulse signal from the outdoor controller board e Valve position can be changed in proportion to the number of pulse signal lt Connection between the outdoor controller board and the linear expansion valve gt Outdoor controller board LEV 4 Orange 3 lt ram SH lt gt 6 000 F 00041 4 De ai i 2 ae ES aci ial lt Connector LEV A te lt Output pulse signal and the valve operation gt 9 Output Phase Opening a valve 8 gt 7 gt 6 gt 5 gt 4 gt 3 gt 2 gt 1 gt 8 Closing a valve 1 gt 2 gt 3 gt 4 gt 5 gt 6 gt 7 gt 8 gt 1 pi The output pulse shifts in above order 22 lt When linear expansion valve oper
69. C E3 or ERC 00 66 is displayed noise may be causing abnormality Error Code Abnormal point and detection method Judgment and action Indoor outdoor unit communication error Signal receiving error Abnormal if indoor controller board could not receive any signal normally for 6 minutes after turning the power on Abnormal if indoor controller board could not receive any signal normally for 3 minutes Consider the unit as abnormal under the following condition When 2 or more indoor units are connected to an outdoor unit indoor controller board could not receive a signal for 3 minutes from outdoor controller circuit board a signal which allows outdoor controller circuit board to transmit signals Contact failure short circuit or miswiring converse wiring of indoor outdoor unit connecting wire Defective transmitting receiving circuit of outdoor controller circuit board Defective transmitting receiving circuit of indoor controller board Noise has entered into indoor outdoor unit connecting wire Defective fan motor Defective rush current resistor x Check LED display on outdoor controller circuit board Connect A Control service tool PAC SG50ST Refer to EA EC item if LED displays EA AC Check disconnecting or looseness of indoor outdoor unit connecting wire of indoor unit or outdoor unit Check all the units in case of twin indoor unit system Turn the power o
70. Changes for the Better MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS SPLIT TYPE AIR CONDITIONERS April 2012 No OCH512 Outdoor unit SERVICE MANUAL R410A Model names Service Ref PUZ A42NHA5 PUZ A42NHA5 Noe This manual describes iaus PUZ A42NHA5 BS e RoHS compliant products have lt G gt mark on the spec name plate pur anas PUY A42NHA5 pur aanwas PUY A42NHA5 BS CONTENTS 1 REFERENCE MANUAL 2 2 SAFETY PRECAUTION 2 SPEEA TURE Gite teen ie aerate tase 6 ASSPEGIEIGATIONS ieee uta 7 S DATAS a naam ele 8 6 OUTLINES AND DIMENSIONS 11 7 WIRING DIAGRAM 12 pe 8 WIRING SPECIFICATIONS 13 8 9 REFRIGERANT SYSTEM DIAGRAN 18 10 TROUBLESHOOTING v e s1s ecescesseseeseeeeesees 20 11 EASY MAINTENANCE FUNCTION 72 12 FUNCTION SETTING 75 13 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 83 ong 14 DISASSEMBLY PROCEDURE 93 PARTS CATALOG OCB512 PUZ A42NHA5 o DSUN 1 REFERENCE MANUAL INDOOR UNIT Model name Service Ref Service manual No PLA A42BA4 PLA A42BA4 OCH482 OC
71. D 1 When LED2 is lit DC12 15V is supplied to remote controller however Check the remote controller wiring for no display is indicated breaking or contact failure e PLEASE WAIT is not displayed 2 When LED2 is blinking PLEASE WAIT is displayed Check short circuit of remote controller wiring 3 When LED2 is not lit Refer to phenomena No 3 below Check the following lt Failure of remote controller if PLEASE WAIT is not displayed lt Refer to phenomena No 2 below if PLEASE WAIT is displayed 2 PLEASE WAIT display is remained DAt longest 2 minutes after the power supply PLEASE ONormal operation on the remote controller WAIT is displayed to start up Self diagnosis of remote controller Communication error between the remote controller PLEASE WAIT is displayed for 6 min and indoor unit utes at most in case of indoor outdoor unit Communication error between the indoor and outdoor communication error Check LED3 on unit indoor controller board Outdoor unit protection device connector is open 1 When LEDS is not blinking Check indoor outdoor connecting wire for miswiring Converse wiring of S1 and S2 or break of S3 wiring 2 When LEDS is blinking Indoor outdoor connecting wire is nor mal Check LED display on outdoor controller circuit board Refer to 10 10 Check protection device connector 63L and 63H for contact failure Refer to 10 9 3 When
72. D an 3 ons WHT 12 gE 2 TRANS 1 WHT 7 we ee z le 1 CT ze CNDC 2 F 2 A PNK 23 8 7 Zop F2 F3 a z BE CNS t W x 2 65 WHT sh ah ya Fi F4 2184 ss 3 4 GRN Sl WHT x2 PUZ only ps3 TABT WAT afo Et a z 1 CN3 he F 5 I a alls HE V YA DCL 4 4 M NET ADAPTER E T SYMBOL NAME oy op ER TB7 Terminal Block lt M net connection gt RED p RED CN5 Connector lt Transmission gt r Nio 4 CND Connector lt Power Supply gt BLK O T 29 war Kr ES 1 MODEL SELECT w CN2M Connector lt M NET communication gt LH N A 8 INDOOR The black square m indicates a switch position SWL Switeh lt Status of sommaria ACTM i UNIT MODEL SW6 SW5 5 6 2 witch lt Acgress setting Tst digit gt POWER SUPPLY oN mam Gam ON SW12 Switch lt Address setting 2nd digit gt 208 230V 60Hz PUZ A42NHAS OFF LIL oF IDI a LED1 LED lt Power Supply DC5V gt xUse copper supply wires LED2 LED lt Connection to Outdoor Unit gt mun an issi i PUY A42NHAS5 OW oN LED3 LED lt Transmission Sending gt OFFI a mimin E oF LED4 LED lt Transmission Receiving gt LED5 LED lt Power Supply DC12V gt 3 2 SW5 1 to 4 Function switch OCH512 12 8 WIRING SPECIFICATIONS 8 1 INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT A control application The following connection patterns are available The outdoor unit power supply patterns vary on models 1 1 System
73. FF The clock function cannot be used 3 Timer function setting To switch the setting press the ON OFF button Choose one of the followings WEEKLY TIMER initial setting The weekly timer can be used AUTO OFF TIMER The auto off timer can be used SIMPLE TIMER The simple timer can be used TIMER MODE OFF The timer mode cannot be used When the use of clock setting is OFF the WEEKLY TIMER cannot be used 4 Contact number setting for error situation To switch the setting press the ON OFF button CALL OFF The set contact numbers are not displayed in case of error CALL The set contact numbers are displayed in case of error The contact number can be set when the display is as shown on the left Setting the contact numbers To set the contact numbers follow the following procedures Move the flashing cursor to set numbers Press the TEMP V and A button to move the cursor to the right left Press the CLOCK S and A button to set the numbers 4 4 Display change setting 1 Temperature display C F setting To switch the setting press the ON OFF button DC The temperature unit C is used F The temperature unit F is used 2 Room air temperature display setting To switch the setting press the ON OFF button ON The room air temperature is displayed OFF The room air temperature is not displayed 3 Automatic cooling heati
74. Indoor heat exchanger temperature D Indoor intake air temperature 18 36 54 72 90 108 126 144 F Indoor intake air temperature Indoor heat exchanger temperature 0 18 36 54 72 90 108 126 144 F Discharge temperature Indoor heat exchanger temperature Discharge temperature Outdoor heat exchanger temperature 74 12 FUNCTION SETTING 12 1 UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set according to necessity using the remote controller The setting of function for each unit can only be done by the remote controller Select function available from the table 1 1 Functions available when setting the unit number to 00 Select 00 referring to setting the indoor unit number lt Table 1 gt Function selections 6 Initial setting when sent from the factory Remarks Function Settings Wired remote controller Setting No RF thermistor Power failure Not available 1 automatic recovery Available 101 Indoor temperature Average data from each indoor unit detecting Data from the indoor unit with remote controllers Data from main remote controller LOSSNAY Not supported e The setting is e applied to all the units in the same refrigerant system connectivity Supported indoor unit dose not intake outdoor air through LOSSNAY Supported indoor unit intakes outdoor air through LOSSNAY Power suppl
75. LOW The airflow direction is changed during HEAT operation The airflow direction cannot be set by remote controller In HEAT operation the up down vane is automatically controlled according to the temperature of the indoor unit s heat exchanger In the following cases written below the up down vane will be set to horizontal blow and the setting cannot be changed by remote controller 1 At the beginning of the HEAT operation 2 While the outdoor unit is being stopped by thermostat or when the outdoor unit gets started to operate 3 During DEFROST operation The airflow direction will be back to the setting of remote controller when the above situations are released STANDBY will be displayed on the remote controller in case of 1 and 2 DEFROST will be displayed on the screen in case of 3 The airflow direction does not change Up down vane left right louver 1 Check if the vane is set to a fixed position Check if the vane motor connector is removed 2 Check if the air conditioner has a function for switching the air direction 3 If the air conditioner doesn t have that function NOT AVAILABLE will be displayed on the remote controller when AIR DIRECTION or LOUVER button is pressed The air conditioner starts operating even though any buttons on the remote controller are not pressed Check if you set ON OFF timer The air conditioner starts
76. OOL MODE The temperature range can be changed on cooling dry mode LIMIT TEMP HEAT MODE The temperature range can be changed on heating mode LIMIT TEMP AUTO MODE The temperature range can be changed on automatic mode OFF initial setting The temperature range limit is not active When the setting other than OFF is made the temperature range limit setting on cooling heating and automatic mode is made at the same time However the range cannot be limited when the set temperature range has not changed To increase or decrease the temperature press the TEMP 7 or A button To switch the upper limit setting and the lower limit setting press the a1 button The selected setting will flash and the temperature can be set Settable range Cooling Dry mode Lower limit 19 C 30 C 67 F 87 F Upper limit 30 C 19 C 87 F 67 F Lower limit 17 C 28 C 63 F 83 F Upper limit 28 C 17 C 83 F 63 F Lower limit 19 C 28 C 67 F 83 F Upper limit 28 C 19 C 83 F 67 F Heating mode Automatic mode OCH512 4 3 Mode selection setting 1 Remote controller main sub setting To switch the setting press the ON OFF button Main The controller will be the main controller Sub The controller will be the sub controller 2 Use of clock setting To switch the setting press the ON OFF button ON The clock function can be used O
77. Please refer to the indoor unit installation manual x3 SW7 1 2 are used for demand control SW7 1 2 are effective only at the demand control Refer to next page Special function b 3 4 Please do not use SW7 3 6 usually Trouble might be caused by the usage condition 2 Function of connector f Action by open short operation DERSTE Types Connector Function Effective timing Short Open Connector CN31 Emergency operation Start Normal When power supply ON OCH512 59 Special function a Low level sound priority mode Local wiring Unit enters into Low level sound priority mode by external signal input setting Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual Adding a commercial timer or on off switch contactor setting to the CNDM connector which is optional contactor for demand input located on the outdoor controller board enables to control compressor operation frequency x The performance depends on the load of conditioned outdoor temperature How to wire lt Low level sound priority mode circuit gt Insulate this point securely as Adaptor for external this is not used p signal input Outdoor unit Purchased locally N PAC SC36NA controller board pe ete ee IA 1 aa ri 1 l Red 3 I Relay 1 supply sw CNDM SWI Switch 1 X Relay Contact spec DC1mA Max 10 m 33ft including local wiring
78. Settings 4 Way cassette Ceiling suspended Wired remote controller RF thermistor PLA BA PCA KA Filter sign 100h 2500h Clean the filter indicator is not displayed Air flow Fan speed No of air outlets Optional high efficiency Not supported filter Supported Vane setting No vanes Vane No 3 setting PLA only Vane No 1 setting Vane No 2 setting Optional humidifier Not supported PLA only Supported Vane differential setting No 1 setting TH5 75 82 F 24 28 C in heating mode No 2 setting Standard TH5 82 90 F 28 32 C cold wind prevention No 3 setting TH5 90 100 F 32 38 C Swing Not available i Swing PLA BA Available Wave air flow Set temperature in heating Available mode 4 deg up 1 Not available Fan speed when the Extra low heating thermostat is OFF Stop Keeping fan speed set by remote controller Fan speed when the Keeping fan speed set by remote controller cooling thermostat is OFF Stop Detection of abnormality of Detect the pipe temperature P8 Neglect PDO W PO J PO HP DO KA IN PO WIND PO 100 PO Oo IN J gt Nn e e Mode No 11 Settings PLA BA PCA KA Vane No 3 setting Less smudging No Vanes Downward position than the standard Vane No 1 setting Standard Standard No vane function Less draft Less d
79. U button The currently selected setting number will blink so check the currently set content Mode number display section Mode number 02 Indoor temperature detection Press the ft TEMP buttons v D and CA to select the desired setting number Ge iI Setting number display section Setting number 1 Indoor unit operating average Setting number 3 Remote controller built in sensor The mode number and setting number will stop blinking and remain lit indicating the Register the settings you have made in steps to Press the MODE button The mode number and setting number will start to blink and registration starts end of registration Ca Ca co Ca Dei If is displayed for both the mode number and setting number and 88 blinks in the room temperature display area a transmission error may have occurred Check to see if there are any sources of noise or interference near the transmission path If you wish to continue to select other functions repeat steps to Complete function selection WS Hold down the FILTER C__ mode is 15 to 28 and TEST buttons simultaneously for at least 2 seconds After a while the function selection screen will disappear and the air conditioner OFF screen will reappear Do not operate the remote controller for at least 30 seconds after c
80. ant address a ng 236 FAN AUTOSTOP F unit No o C e o Select mode No 24 function that raises set temperature by 4 degrees during HEAT operation NO fone VANE omt Set address 24 while still in troubleshooting mode then press the HOUR button C Ol CHECK LOUVER Select setting No 02 OFF Set address 02 while still in troubleshooting mode then press the HOUR button TEST RUN s sdm on Finished gt NO YES End function selection mode Note When you switch to function selection mode End troubleshooting mode on the IR wireless remote controller s operation area the unit ends function selection mode automatically if nothing is input for 10 minutes or longer Operating instructions Check the function settings Press the button twice continuously gt is lit and 00 blinks Press the temp button once to set 50 Direct the IR wireless remote controller toward the receiver of the indoor unit and press the button Set the unit number Press the temp 090 button to set the unit number Press 01 to specify the indoor unit whose unit number is 01 Direct the IR wireless remote controller toward the receiver of the indoor unit and press the button By setting unit number with the E button specified indoor unit starts performing fan operation Detect which unit is assigned to which number using this function If unit number is
81. ation stops all output phase become OFF p3 p4 e When the switch is turned on 700 pulse closing valve signal will be sent till it goes to point in order to define the valve position The pulse signal is being sent for about 20 seconds 2 Linear expansion valve operation When the valve moves smoothly there is no sound or vibration occurring from the linear expansion valve however when the pulse number moves from to or when the valve is locked 5 a sound can be heard than normal situation 2 No sound is heard when the pulse number moves from to in 2 case coil is burn out or motor is locked by open phase gt 9 5 i Sound can be detected by placing the ear against the screw driv a i er handle while putting the screw driver to the linear expansion 8 i valve gt Close Open I 1 1 1 j i 500 pulse Opening a valve allthe way 1 1 A Pulse number Extra tightening about 32 pulse OCH512 50 4 How to attach and detach the coil of linear expansion valve lt Composition gt Linear expansion valve is separable into the main body and the coil as shown in the diagram below Stopper Main body Coil za Lead wire lt How to detach the coil gt Hold the lower part of the main body shown as A firmly so that the main body does not move and detach the coil by pulling it upward Be sure to detach the coil holding main body firmly Otherwise pip
82. ator leg fixing screws OCH512 97 Mir SUNAN MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2012 MITSUBISHI ELECTRIC CORPORATION rd Distributed in Apr 2012 No OCH512 New publication effective Apr 2012 Made in Japan Specifications are subject to change without notice
83. blows and water is drained A MITSUHSHI ELECTRIC Press BLOPERATION SWITCH Heating mode Check if warm air blows It takes a little TEST BUH a IER button while until warm air blows ge 58 Salle J oe 4 Press AIR DIRECTION Jbutton Check for correct motion of auto vanes cine eae st 5 Check the outdoor unit fan for The outdoor unit features automatic capacity control to Oi TED S 5 ED De n correct running provide optimum fan speeds Therefore the fan keeps K lt C 79 I running at a low speed to meet the current outside air condition unless it exceeds its available maximum power Then in actuality the fan may stop or run in the reverse direction depending on the outside air but this does not mean malfunction Press the ON OFF Jbutton to reset the test run in progress Register the contact number TEST button Pipe liquid temperature lt In case of test run the OFF timer will be activated and the test run will automatically stop after 2 hours lt The room temperature display section shows the pipe temperature of indoor units during the test run lt Check that all the indoor units are running properly in case of simultaneous twin operation Malfunctions may not be dis played regardless of incorrect wiring x1 After turning on the power supply the system will go into startup mode PLEASE WAIT
84. ch as noise or lightning surge Address forwarding from unit processor is not transmitted normally because of defective transmission processor hard ware Turn off the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more and turn the power on again System returns to normal if abnormality was accidental malfunc tion If the same abnormality generates again abnormality generated controller may be defec tive NO ACK signal 1 Transmitting side controller detects abnormal if a massage was transmitted but there is no reply ACK that a mes sage was received Transmitting side detects abnormality every 30 seconds 6 times continuously Note The address and attribute displayed at remote controller is indicate the controller that did not reply ACK Common factor that has no rela tion with abnormality source The unit of former address does not exist as address switch has changed while the unit was energized Extinction of transmission wire voltage and signal is caused by over range transmission wire Maximum distance 200m 656ft e Remote controller line 12m 39ft Extinction of transmission wire voltage and signal is caused by type unmatched transmission wire With shield wire CVVS CPEVS With normal wire no shield VCTF VCTFK CVV CVS VVR VVF VCT Diameter 1 25mm2 AWG16 or more Extinction of transmission wire voltage a
85. clear the error code press the ON OFF button wa MITSUBISHI ELECTRIC Alternating Display CHECK CHECK ch en Wd nn SIK nn Sits LILI LILI Error Y 2 or 4 digits Address 3 digits or unit number 2 digits When using remote local controller combined operation cancel the error code after turning off remote operation During central control by a MELANS controller cancel the error code by pressing the MD ON OFF button 10 3 2 Self Diagnosis During Maintenance or Service Since each unit has a function that stores error codes the latest check code can be recalled even if it is cancelled by the remote controller or power is shut off Check the error code history for each unit using the remote controller Set the unit number or refrigerant address you want to diagnose Switch to self diagnosis mode Press the TEMP buttons V and CA D to select the desired Press the CHECK button twice within 3 seconds number or address The number address changes between 01 and 50 The display content will change as shown below or 00 and 15 SELF CHECK nr ZELF CHECK Kh mm A LILI gu The refrigerant address will begin to blink Unit number or refrigerant address approximately 3 seconds after being to be diagnosed selected and the self diagnosis pr
86. controller could not find blank of transmission path for 6 sec onds and could not transmit Error code E3 Remote controller receives transmitted data at the same time compares the data and when detecting it judges different data to be abnormal 30 continuous times Error code E3 Abnormal if indoor controller board could not find blank of transmission path Error code E5 Indoor controller board receives trans mitted data at the same time compares the data and when detecting it judges different data to be abnormal 30 continuous times Error code E5 OCH512 2 remote controller are set as main In case of 2 remote con trollers Remote controller is connected with 2 indoor units or more Repetition of refrigerant address Defective transmitting receiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board Noise has entered into trans mission wire of remote control ler 32 Set a remote controller to main and the other to sub Remote controller is connected with only one indoor unit The address changes to a separate setting Diagnose remote controller a When RC OK is displayed remote con trollers have no problem Turn the power off and on again to check When becoming abnormal again replace indoor controller board b When RC NG is displayed replace remote controller c When R
87. correct polarity lt Measure impedance between the ground and the power supply terminal block L1 L2 on the outdoor unit by 500V Megger and check that it is 1 0MQ or over x Do not use 500V Megger to indoor outdoor connecting wire terminal block S1 S2 S3 and remote controller terminal block 1 2 This may cause malfunction lt Make sure that test run switch SW4 is set to OFF before turning on power supply Turn on power supply 12 hours before test run in order to protect compressor For specific models which requires higher ceiling settings or auto recovery feature from power failure make proper changes of settings referring to the description of 12 FUNCTION SETTING Make sure to read operation manual before test run Especially items to secure safety OCH512 20 While the room temperature display on the remote controller is PLEASE WAIT the remote controller is disabled Wait until PLEASE WAIT disappears before using remote controller PLEASE WAIT appears for about 2 minutes after power supply is turned on 1 Operating procedures Turn on the main power supply TEST RUN and the currently selected operation mode are displayed alternately Displays the remaining test run time Press D TEST button twice The TEST RUN appears on the screen Cooling mode Check if cool air
88. d temperature display on remote temperature is not in the cooling range or condenser evaporator gt controller and outdoor controller circuit 3 minutes after compressor start and temperature thermistor board 6 minutes after the liquid or condenser e Shortage of refrigerant Pipe lt liquid or condenser evaporator gt evaporator pipe is out of cooling range Disconnected holder of temperature display is indicated by Note 1 It takes at least 9 min to detect pipe lt liquid or condenser setting SW2 of outdoor controller circuit Note 2 Abnormality P8 is not detected in evaporator gt thermistor board as follows _ drying mode Defective refrigerant circuit Conduct temperature check with outdoor ie seo cirouit beard ater connecting TH1 3 deg 5 4 F connection A Control Service Tool PAC SK52ST TH Lower temperature between liquid pipe Converse wiring of indoor Temperature display of indoor liquid pipe Maa siene e anan temperature and condenser evaporator outdoor unit connecting wire 1 2 3 4 5 6 temperature on plural units connection ON Defective detection of indoor OFF lt Heating mode gt room temperature and pipe Temperature display of indoor liquid pipe Temperature display of indoor con When 10 seconds have passed after the lt condenser evaporator gt Indoor 2 evaporator pipe Indoor 2 compressor starts operation and the hot temperature thermistor ss adjustment mode has finished the unitis Stop valve is not
89. e defective repeater circuit Replace multi controller board one by one to check if the unit returns to normal Continued to the next page From the previous page Error Code Abnormal point and detection method Case Judgment and action 4 If displayed address or attribute is remote controller Indoor unit detects abnormality when indoor unit transmitted to remote control ler and there was no reply ACK During group operation with indoor unit of multi refrigerant system if indoor unit transmit to remote controller while out door unit power supply of one refrigerant system is turned off or within 2 minutes of restart abnormality is detected Contact failure of transmission wire of remote controller or indoor unit Disconnection of transmission connector CN2M of indoor unit Defective transmitting receiving circuit of indoor unit or remote controller 5 If displayed address or attribute is FRESH MASTER Indoor unit detects abnormality when indoor unit transmitted to FRESH MASTER and there was no reply ACK During sequential operation of indoor unit and FRESH MASTER of other refrigerant system if indoor unit transmits to FRESH MASTER while outdoor unit power supply of same refrigerant system with FRESH MASTER is turned off or within 2 minutes of restart abnormality is detected Contact failure of transmission wire of indoor unit or FRESH MASTER Disconnection of transmiss
90. e terminal Tanssin I A B S on M NET terminal block should be individually wired to the other outdoor unit s terminal i e Ato A B to B and S to S In this case choose one of those outdoor units and drive a screw to fix an ground wire on the plate as shown on the right figure 8 4 1 M NET address setting In A control models M NET address and refrigerant address should be set only for the outdoor unit Similar to CITY MULTI series there is no need to set the address of outdoor unit and remote controller To construct a central control system the setting of M NET address should be conducted only upon the outdoor unit The setting range should be 1 to 50 the same as that of the indoor unit in CITY MULTI system and the address number should be consecutively set in a same group Address number can be set by using rotary switches lt Setting example gt M NET Address No 1 2 50 SW11 for ones digit and SW12 for tens digit which Swi KWA is located on the M NET board of outdoor unit Switching digit 271 22 a S 15 Initial setting all addresses are set to 0 setting sw12 gt res gt ine 8 4 2 Refrigerant address setting In case of multiple grouping system multiple refrigerant circuits in one group indoor units should be connected by remote controller wiring TB5 and the refrigerant address needs to be set Leave the refrigerant addres
91. e terminals are NOT electrically insulated by the transformer or other device N Caution Be sure to install N Line Without N Line it could cause damage to the unit Notes 1 Wiring size must comply with the applicable local and national code 2 Use copper supply wires 3 Use wires rated 600V or more for the power supply cables and the indoor outdoor unit connecting cables 4 Install an earth longer than other cables 230V Single phase Isolator 3 poles isolator S1 S1 A Control ga i s2 A Control Outdoor Unit Indoor Unit s3 S3 In case of A control wiring there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line Therefore please turn off the main power supply when servicing And do not touch the S1 S2 S3 terminals when the power is energized If isolator should be used between indoor unit and outdoor unit please use 3 pole type OCH512 13 8 2 SEPARATE INDOOR UNIT OUTDOOR UNIT POWER SUPPLIES The following connection patterns are available The outdoor unit power supply patterns vary on models 1 1 System The optional indoor power supply terminal kit is required Outdoor unit power supply Wiring circuit breaker or isolating switch Outdoor unit Indoor unit outdoor unit connecting cords Remote controller Indoor unit Indoor unit powe
92. ea for 2 seconds a transmission error may have occurred Check to see if there are any sources of noise or interference near the transmission path Note If you have made operational mistakes during this procedure exit function selection see step then restart from step Set the indoor unit number Pressthe ON OFF button so that blinks in the unit number display area Unit number display section To set modes 01 to 06 or 15 to 22 select unit number 00 To set modes 07 to 14 or 23 to 28 carry out as follows To set each indoor unit individually select 01 to 04 To set all the indoor units collectively select AL Confirm the refrigerant address and unit number Press the button to confirm the refrigerant address and unit number After a while will start to blink in the mode number display area Mode number display section 88 will blink in the room temperature display area if the selected refrigerant address does not exist in the system Furthermore if F appears and blinks in the unit number display area and the refrigerant address display area also blinks there are no units that corre spond to the selected unit number In this case the refrigerant address and unit Press the CLOCK buttons C and CA D to select the unit number of the indoor unit for which you want to perform function selection The unit number
93. eck Approx 2 5 sec 0 5 sec 0 5 sec 0 5 sec 0 5 sec Approx 2 5 sec 0 5 sec 0 5 sec NS Z Number of blinks beeps in pattern indicates the check code in the following table i e n 5 for P5 starts Start signal received Number of blinks beeps in pattern indicates the check code in the following table Output pattern B Beeper sounds OPERATION INDICATOR lamp blink pattern Beep san e Beep Beep Beep Self check Approx 2 5 sec starts gt lt Off On Approx 3 sec On On On 0 5 sec 0 5 sec 0 5 sec NG Beep rel e lady e Beep Beep lt On 0 5 sec Approx 2 5 sec Off On Approx 3 sec On WA On _ tel 2nd Repeated gt 0 5 sec 0 5 sec i ede Number of blinks beeps in pattern indicates the check code in the following table i e n 5 for U2 Sy Number of blinks beeps in pattern indicates the check code in the following table Output pattern A Errors detected by indoor unit IR wireless remote controller Wired remote controller Beeper sounds OPERATION Symptom Remark INDICATOR lamp blinks Check code Number of times 1 P1 Intake sensor error 2 P2 Pipe TH2 sensor error P9 Pipe TH5 sensor error 3 E6 E7 Indoor outdoor unit communication error 4 P4 Drain sensor error Float switch connector open P5 Drain pump error PA Fo
94. efective e Check if the remote controller wire is short circuited e Replace the indoor controller board lt Before repair Frequent calling from customers Phone Calls From Customers How to Respond Unit does not operate at all The operating display of remote controller does not come on Check if power is supplied to air conditioner Nothing appears on the display unless power is supplied Unit cannot be restarted for a while after it s stopped Wait around 3 minutes to restart unit The air conditioner is in a state of being protected by the microprocessor s directive Once the compressor is stopped the unit cannot be restarted for 3 minutes This control is also applied when the unit is turned on and off by remote controller or thermostat Error code appears and blinks on the display of remote controller Error code will be displayed if any protection devices of the air conditioner are actuated What is error code Refer to SELF DIAGNOSIS ACTION TABLE jJ Check if servicing is required for the error Remote controller PLEASE WAIT is displayed on the screen Wait around 2 minutes An automatic startup test will be conducted for 2 minutes when power is supplied to the air conditioner PLEASE WAIT will be kept being displayed while that time FILTER is displayed on the screen This indicates that it is time to clean the air
95. eing short circuited if they are broken Measure the resistance in the following points connectors etc If they are short circuited it means that they are broken TABP1 TABS TABN1 TABS TABP1 TABT TABN1 TABT CNDC 280 380V DC Connect to the outdoor 18V DC DIP IPM controller circuit board 16V DC 16V DC x ReoboNs49 A Ta no Sl TABS TABT iik ee ey Connect to the bant 7 tdoor noise fil CNAF oo eee Connect to ACTM e 555 ter circuit board f ARG 2 Voltage among Pad ae 555 1 phases JAH Ji lk ed 208 230V AC 2 ra ABV A lt wHT s lt n sete CN3 j 83 s Sl S 323 Thermistor TH8 SE lt Heatsink gt has te G P u v vy v H a F 33 wn 5 CNS rit x aran goco MTABPI Detection of primary R bis oro Connect to 52C current 2 gle PC R70 ol E q Connect to the g P 56 outdoor noise filter 8 bls i Sa circuit board CN5 P EP e me panes o CN4 iL UP Bsa En ACTM Connect to the are vx v v outdoor controller ies circuit board CN4 or TABP2 SC P2 Connect to ACTM Ny lt DIP asas ere TABP TABU V W Connect to the Connect to the compressor MC Connect to ACTM smoothing capacitor CBO A42N only smoothing capacitor CB A42N only OCH512 Voltage among phases 10V 180V AC 56 Active filter module PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY
96. emote controller display FA and current operation mode are displayed Press the FS mada button to activate cos mode then check whether cool air is blown out from the unit Press the ME sox button to activate kero mode then check whether warm air is blown out from the unit Press the button and check whether strong air is blown out from the unit Press the button and check whether the auto vane operates properly Press the ON OFF button to stop the test run Note lt Point the remote controller towards the indoor unit receiver while following steps to Q lt It is not possible to run in FAN DRY or AUTO mode 22 10 3 HOW TO PROCEED SELF DIAGNOSIS 10 3 1 When a Problem Occurs During Operation Ifa problem occurs in the air conditioner the indoor and outdoor units will stop and the problem is shown in the remote controller display CHECK and the refrigerant address are displayed on the temperature display and the error code and unit number are displayed alternately as shown below If the outdoor unit is malfunctioning the unit number will be 00 In the case of group control for which remote controller controls gt Monorr multiple refrigerant systems the refrigerant address and error code of the gt unit that first experienced trouble i e the unit that transmitted the error tun code will be displayed To
97. erating frequency 0 255 Hz 18 Outdoor unit Fan output step 0 10 Step 19 Outdoor unit Fana speed f 0 _9999 ken Only for air conditioners with DC fan motor 20 Outdoor unitpane speed f 0 9999 rom 0 is displayed if the air conditioner is a single fan Only for air conditioners with DC fan motor type 21 22 LEV A opening 0 500 Pulses 23 LEV B opening 0 500 Pulses 24 25 Primary current 0 50 A 26 DC bus voltage 180 370 V 27 28 29 Number of connected indoor units 0 4 Units 30 Indoor unit Setting temperature 62 86 SE 31 Indoor unit Intake air temperature lt Measured by thermostat gt 46 102 F 32 Indoor unit Intake air temperature Unit No 1 46 102 oF O is displayed if the target unit is not present lt Heat mode 4 deg correction gt 33 Indoor unit Intake air temperature Unit No 2 46 102 oF t lt Heat mode 4 deg correction gt 34 Indoor unit Intake air temperature Unit No 3 46 102 oF t lt Heat mode 4 deg correction gt 35 Indoor unit Intake air temperature Unit No 4 46 102 oF t lt Heat mode 4 deg correction gt 36 37 Indoor unit Liquid pipe temperature Unit No 1 38 190 S 0 is displayed if the target unit is not present 38 Indoor unit Liquid pipe temperature Unit No 2 38 190 F t 39 Indoor unit Liquid pipe temperature Unit No 3 38 190 oF t 40 Indoor unit Liquid pipe temperature Unit No 4 38 190 F t 41 42 Indoor unit Cond
98. es can bend due to pressure lt How to attach the coil gt Hold the lower part of the main body shown as A firmly so that the main body does not move and attach the coil by inserting it downward into the main body Then securely attach the coil stop per to main body At this time be careful that stress is not added to lead wire and main body is not wound by lead wire If the stopper is not firmly attached to main body coil may be detached from the main body and that can cause defective operation of lin ear expansion valve To prevent piping stress be sure to attach the coil holding the main body of linear expansion valve firmly Otherwise pipe may break OCH512 51 10 8 EMERGENCY OPERATION 1 When the error codes shown below are displayed on outdoor unit or microprocessor for wired remote controller or indoor unit has a failure but no other problems are found emergency operation will be available by setting the emergency opera tion switch SWE to ON and short circuiting the connector CN31 on outdoor controller board When following abnormalities occur emergency operation will be available Error code Inspected content U4 Open short of pipe thermistor TH3 TH6 E8 Indoor outdoor unit communication error Signal receiving error Outdoor unit E9 Indoor outdoor unit communication error Transmitting error Indoor unit Communication error other than outdoor unit Ed Communicaiton error be
99. es of com pressor 0 9999 0 9999 When the number of times is 100 or more hundreds digit tens digit and ones digit are displayed by turns Example When 42500 times 425 x 100 times 0 5 secs 0 5secs 2 secs Compressor integrating operation times 0 9999 0 9999 When it is 100 hours or more hundreds digit tens digit and ones digit are displayed by turns Example When 2450 hours 245 x 10 hours 0 5 secs 0 5secs 2 gt 45 gt 2 secs Compressor operating current 0 50 0 50 Omit the figures after the decimal fractions Compressor operating frequency 0 255 0 255 When it is 100Hz or more hundreds digit tens digit and ones digit are displayed by turns Example When 125Hz 0 5 secs 0 5secs Ji gt 25 gt 2 secs LEV A opening pulse 0 480 0 480 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns Example When 150 pulse 0 5 secs 0 5secs Ji gt 50 gt 2 secs Error postponement code history 1 of outdoor unit Postponement code display Blinking During postponement Lighting Cancellation of postponement 00 is displayed in case of no postponement Code display Operation mode on error occurring
100. expansion valve TH3 Thermistor B TH7 6 a Thermistor gt L lt Outdoor 2 phase pipe gt TH32 y Thermistor lt Shell gt lt 63H __ _ High pressure switch VFG TEST POINT Voltage between right pins of PC5C and PC5D pin 3 and pin 4 Same as Vsp TEST POINT Voltage between pins Qo Connect to M NET adapter CN5 1 CNVMNT B oo o o ojo eo oof o zv T ac o HP io eio 710 CN51 External signal output e Compressor operat ing signal e Abnormal signal m CNDM D to Input of low level sound priority mode O to Input of external con tact point CN52C Connect to the noise filter circuit board CN52C 90200000 CNioo Soom of C5A C5B DC OV when stopped DC 1 6 5V CNF1 CNF2 when operated Connect to the fan motor 280V DC 15V DC 0 6 5V DC 15V DC When stopped OCH512 7 5V DC When operated OV 15V pulse CNDC 280V DC Outdoor power circuit board 54 Js Communication power D71 Voltage 24V DC lt CNS CN4 Transmission to out door power circuit board CN4 SV2 Bypass valve lt A24 30 36 only gt Four way valve lt PUZ only gt CN2 Connect to the outdoor power circuit board CN2 T O Reception from power circuit board Zero cross signal 0 5V DO 18V DC 16V DC 16V DC lt CNAC t
101. ff and on again to check If abnormality generates again replace indoor controller board or outdoor controller circuit board Turn the power off and detach fan motor from connector CNF1 2 Then turn the power on again If abnormality is not displayed replace fan motor If abnormality is displayed replace outdoor controller circuit board Check RS1 on outdoor noise filter board with tester If open is detected replace the board x Other indoor controller board may have defect in case of twin indoor unit system Indoor outdoor unit communication error Signal receiving error Outdoor unit 1 Abnormal if outdoor controller circuit board could not receive anything normally for 3 minutes Contact failure of indoor outdoor unit connecting wire Defective communication circuit of outdoor controller circuit board Defective communication circuit of indoor controller board Noise has entered into indoor outdoor unit connecting wire Check disconnection or looseness of indoor outdoor unit connecting wire of indoor or outdoor units Turn the power off and on again to check Replace indoor controller board or outdoor controller circuit board if abnormality is displayed again Indoor outdoor unit communication error Transmitting error Outdoor unit 1 Abnormal if 0 receiving is detected 30 times continuously though outdoor controller circuit board has transmitted 1 2 Abnorma
102. fied pressure all at once add pressure little by little Pressurize to 0 5 MPa 5 kgf cm G wait 5 minutes and make sure the pressure does not decrease Pressurize to 1 5 MPa 15 kgf cm G wait 5 minutes and make sure the pressure does not decrease Pressurize to 4 15 MPa 41 5 kgf cm2G and measure the surrounding temperature and refrigerant pressure 3 If the specified pressure holds for about one day and does not decrease the pipes have passed the test and there are no leaks If the surrounding temperature changes by 1 C the pressure will change by about 0 03 MPa 0 3 kgf cm G Make the necessary corrections 4 If the pressure decreases in steps 2 or 3 there is a gas leak Look for the source of the gas leak OO 2 Cy OM El a O gt gt oN o Z Local pipe Sealed same way for gas side Stop valve lt Liquid side gt Pipe cover Stop valve lt Gas side gt Do not use a wrench here Service port Refrigerant leakage may result Open Close section Use 2 wrenches here 3 Start and finish of test run lt Operation from the indoor unit Execute the test run using the installation manual for the indoor unit lt Operation from the outdoor unit By using the DIP switch SW4 on the control board of outdoor unit test run can be started and finished and its operation lt SW4 gt mode cooling heating
103. flow protection is working E6 EF Indoor outdoor unit communication error P6 Freezing overheating protection is working __ No error history P8 Abnormality of pipe temperature FFFF No applied unit Abnormality of pipe temperature thermistor Cond Eva PA Forced compressor stop due to water leakage abnormality Abnormality of indoor controller board See the table below for details of the LED display LED 1 2 3 on the indoor controller board LED1 microprocessor power supply Lights when power is supplied Lights when power is supplied for wired remote controller The indoor unit should be connected to the outdoor unit with address 0 setting Flashes when indoor and outdoor unit are communicating LED2 remote controller LED3 indoor outdoor communication OCH512 21 a4 MITSUBISHI ELECTRIC ON OFF B TEMP 660 26 FAN AUTOSTOP pO JH O MODE VANE AUTO STAR amp mei CHECK LOUVER S waa TEST RU a SET RESET CLOCK OCH512 Test run for IR wireless remote controller Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1 0MQ Turn on the main power to the unit Press the button twice continuously Start this operation from the turned off status of r
104. fter power on because of miswiring converse wiring or disconnection of indoor outdoor unit connecting wire Contact failure or miswiring of indoor outdoor unit connecting wire Diameter or length of indoor outdoor unit connecting wire is out of specified capacity Defective transmitting receiving circuit of outdoor controller circuit board Defective transmitting receiving circuit of indoor controller board Defective indoor power board 2 or more outdoor units have refrigerant address 0 In case of group control Noise has entered into power supply or indoor outdoor unit connecting wire Start up time over The unit cannot finish start up process within 4 minutes after power on OCH512 Contact failure of indoor outdoor unit connecting wire Diameter or length of indoor outdoor unit connecting wire is out of specified capacity 2 or more outdoor units have refrigerant address 0 In case of group control Noise has entered into power supply or indoor outdoor unit connecting wire 28 Check disconnection or looseness or polarity of indoor outdoor unit connecting wire of indoor and outdoor units Check diameter and length of indoor outdoor unit connecting wire Total wiring length 80m 262ft including wiring connecting each indoor unit and between indoor and outdoor unit Also check if the connection order of flat cable is S1 S2 S3 Check
105. ged from OFF to ON After DIP SW1 1 is changed from OFF to ON there is no problem if DIP SW1 1 is left ON or changed to OFF again This depends on the service conditions OCH512 58 A Action by the switch operation 3 Lose Function ON y P OFF Effective timing No function Power failure automatic recovery 2 Auto recovery No auto recovery When power supply ON No function Model select Following SW5 6 reference Sw7 1 SW7 2 Danae on Setting of demand OFF OFE 0 Operation stop conte ON OFF Sao j OFF ON 75 Max Hz setting cooling Max Hz cooling x 0 8 Normal Max Hz setting heating Max Hz heating x 0 8 Normal No function Dip switch Defrost setting For high humidity Normal No function Function switch Valid Normal No function MODEL PUZ A42NHA5 on Model select MODEL puv aanHas NEM 12 nn The black square ms indicates a switch position AO Ni OA GOO N 2 Power failure automatic recovery can be set by either remote controller or this DIP SW If one of them is set to ON Auto recovery activates Please set Auto recovery basically by remote controller because not all units have DIP SW
106. gerant i i ji Refrigera 7 Refrigerant controller address 00 address 01 address 1 address 02 M NET M NET MI M NET Power address 01 address 02 Wess address 05 supply unit for transmission wire ae E controller LJ x In group B M NET address of the outdoor unit whose refrigerant address is 00 is not set to the minimum in the group As 03 is right for this situation the setting is wrong Taking group A as a good sample set the minimum M NET address in the group for the outdoor unit whose refrigerant address is 00 OCH512 17 9 REFRIGERANT SYSTEM DIAGRAM PUZ A42NHA5 Unit mm inch PUZ A42NHA5 BS Service port check High pressure protect switch Ball valve 4 way valve Outdoor heat exchanger 50 a s R Thermistor Refrigerant GAS pipe WA KS TH6 15 88mm 5 8 3 3 Sa ie nae y KI f Thermistor Service port 44 L Muffler JI TES check i Strainer Wa 100 cor Distributor Accumulator Compressor 7 Refrigerant LIQUID pipe H 9 52mm 3 8 ZZ Stra ner Strainer 100 100 Stop valve with service port Linear expansion valve gt Refrigerant flow in cooling REE gt Refrigerant flow in heating PUY A42NHA
107. h is heard when internal parts of units expand or contract when the temperature changes A buzzing sound is heard sometimes This is not a malfunction This is the sound which is heard when the outdoor unit starts operating Aticking sound is heard from the outdoor unit sometimes This is not a malfunction This is the sound which is heard when the fan of the outdoor unit is controlling the airflow amount in order to keep the optimum operating condition A sound similar to water flowing is heard from the unit This is not a malfunction This is the sound which is heard when the refrigerant is flowing inside the indoor unit Something is wrong with the The fan speed does not match the setting of the remote controller during DRY operation No air comes out sometimes during DRY operation This is not a malfunction During the DRY operation the blower s ON OFF is controlled by the microprocessor to prevent overcooling and to ensure efficient dehumidification The fan speed cannot be set by the remote controller during DRY operation The fan speed does not match the setting of the remote controller in HEAT operation OCH512 This is not a malfunction 1 When the HEAT operation starts to prevent the unit from blowing cold air the fan speed is gradually increased from 0 to the set speed in proportion to the temperature rise of the discharged air 2 When the ro
108. he fuses on the outdoor controller board CN2D controller circuit controller circuit board will board are blown be blown when the indoor outdoor connecting wire short circuits e Bad wiring of the e Check if miswiring breaking outdoor controller or poor contact is causing this DC 12V to DC 16V board problem Indoor outdoor e The fuses on the connecting wire is polarized outdoor 3 core type Connect the controller circuit indoor unit and the outdoor board are blown unit by wiring each pair of S1 S2 and S3 on the both side of indoor outdoor terminal blocks Check the voltage of the unit after removing the indoor power board CN2S e Defective indoor e Replace the indoor controller board controller board YES DC 12V to DC 16V e Miswiring breaking Check if there is miswiring or poor connection of or breaking of wire indoor outdoor connecting wire NO e Defective indoor e Replace the indoor power board power board OCH512 40 Symptoms Nothing is displayed on the remote controller Diagnosis flow LED display of the indoor controller board LED1 LED2 LED3 or 9 Inspection method and troubleshooting of the indoor unit Check the voltage between S1 and S2 on the terminal block TB4 NO AC 187V to AC 253V Check the status Not lighting of the indoor controller board LED3 display Blinking
109. he outdoor controller circuit board and the outdoor power circuit board Breaking of wire or contact failure of connector CN4 between the outdoor controller circuit board and the outdoor power circuit board Defective communication circuit of outdoor power circuit board Defective communication circuit of outdoor controller circuit board for outdoor power circuit board Breaking of wire or contact failure of connector between outdoor controller circuit board and M NET board Contact failure of M NET board power supply line Noise has entered into M NET transmission wire 33 ME Check connection of each connector CN2 and CN4 between the outdoor controller circuit board and the outdoor power circuit board Replace outdoor power circuit board Replace outdoor controller circuit board Check disconnection looseness or breaking of connection wire between outdoor controller circuit board CNMNT and M NET board CN5 Check disconnection looseness or breaking of connection wire between outdoor controller circuit board CNMNT and M NET board CND Check M NET transmission wiring method Error Code Abnormal point and detection method Case Judgment and action Pipe temperature Slight temperature difference Check pipe lt liquid or condenser lt Cooling mode gt between indoor room evaporator gt temperature with room Detected as abnormal when the pipe temperature and pipe lt liqui
110. heating heating protection Check if indoor unit has a short cycle on its air duct Check if heat exchanger and filter is not dirty Measure resistance value on indoor and outdoor fan motors Check if the inside of refrigerant piping is not clogged 4 blinking Abnormality of pipe temperature Check if indoor thermistors TH2 and TH5 are not disconnected from holder Check if stop valve is open Check converse connection of extension pipe on plural units connection Check if indoor outdoor connecting wire is connected correctly on plural units connection 5 blinking Abnormality of indoor controller board Replace indoor controller board Abnormality of remote controller board x1 Error code displayed on remote controller 2 Refer to service manual for indoor unit OCH512 Replace remote controller 62 lt Outdoor unit operation monitor function gt When option part A Control Service Tool PAC SK52ST is connected to outdoor controller board CNM Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by controlling DIP SW2 on A Control Service Tool Operation indicator SW2 Indicator change of self diagnosis The black square m indicates a switch position SW2 setting Display detail Explanation for display ON 123456 lt Digital indicator LED1 working details gt Be sure that 1 t
111. igerant oil applied to flare and flange connections must be ester oil ether oil or alkylbenzene oil in a small amount If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Ventilate the room if refrigerant leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released Charge refrigerant from liquid phase of gas cylinder Use the specified refrigerant only If the refrigerant is charged from gas phase composition change may occur in refrigerant and the efficiency will be lowered Do not use refrigerant other than R410A Never use any refrigerant other than that specified Doing so may cause a burst an explosion or fire when the unit is being used serviced or disposed of Correct refrigerant is specified in the manuals and on the spec labels provided with our products We will not be held responsible for mechanical failure system malfunction unit breakdown or accidents caused by failure to follow the instructions If other refrigerant R22 etc is used chlorine in refrige rant can cause deterioration of refrigerant oil etc OCH512 3 1 Cautions for service 1 Perform service after recovering the refrigerant left in unit completely 2 Do not release refrigerant in the air 9 After completing service charge the cycle with specified amount of refrigerant 4 When performing service
112. imary current control e Preventive control for excessive temper ature rise of condensing temperature e Preventive control for excessive temper ature rise of heatsink Code display OCH512 71 11 EASY MAINTENANCE FUNCTION Reduces maintenance work drastically Enables you to check operation data of the indoor and outdoor units by remote controller Furthermore use of maintenance stable operation control that fixes the operating frequency allows smooth inspection even for inverter models Smooth Mainte nance Function Discharge temperature 147 I Conventional inspection work Outdoor unit indoor unit Measure the intake air temperature gt Easy maintenance information unit Accumulated operating Heat exchanger Intake air time lt 10 hours temperature F temperature F Number of ON OFF Discharge Heat exchanger TIN nangu times 10 times temperature F temperature F IIIII Operating Outside air Filter operating II current A temperature F time Hours HW The filter operating time is the time that has elapsed since the filter was reset 11 1 MAINTENANCE MODE OPERATION METHOD Ifyou are going to use the 11 2 GUIDE FOR OPERATION CONDITION set the airflow to High before activating maintenance mode Switchi
113. inals with a tester MC U Winding temperature 20 C 68 F Normal Abnormal A42 0 3020 Open or short Linear expansion valve Disconnect the connector then measure the resistance with a tester LEV A Winding temperature 20 C 68 F Normal Abnormal Gray Black Gray Red Gray Yellow Gray Orange 46 3Q Open or short OCH512 47 Check method of DC fan motor fan motor outdoor controller circuit board Notes High voltage is applied to the connecter CNF1 2 for the fan motor Pay attention to the service Do not pull out the connector CNF1 2 for the motor with the power supply on It causes trouble of the outdoor controller circuit board and fan motor Self check Symptom The outdoor fan cannot turn around Fuse check Check the fuse F5 on outdoor controller board Replace outdoor controller board C B i lt Did the fuse blow gt Yes gt a i u METS 4 No Wiring contact check Contact of fan motor connector CNF1 2 v 4 Is there contact failure gt Yes gt 4 No Power supply check Remove the connector CNF1 2 Measure the voltage in the outdoor controller circuit board TEST POINT Voc between 1 and 4 of the fan connector Voc DC250 330V TEST POINT Vcc between 5 and 4 of the fan connector Vec DC15V
114. ion connector CN2M of indoor unit or FRESH MASTER Defective transmitting receiving circuit of indoor unit or FRESH MASTER 6 If displayed address or attribute is LOSSNAY Indoor unit detects abnormality when indoor unit transmitted to LOSSNAY and there was no reply ACK If the power supply of LOSSNAY is turned off indoor unit detects abnormality when it transmits to LOSSNAY During sequential operation of indoor unit and LOSSNAY of other refrigerant system if indoor unit transmits to LOSSNAY while outdoor unit power supply of same refrig erant system with LOSSNAY is turned off or within 2 min utes of restart abnormality is detected Contact failure of transmis sion wire of indoor unit of LOSSNAY Disconnection of transmission connector CN2M of indoor unit Defective transmitting receiv ing circuit of indoor unit or LOSSNAY 7 If displayed address or attribute is non existent OCH512 The unit of former address does not exist as address switch has changed while the unit was energized Abnormality is detected when indoor unit transmit ted because the address of FRESH MASTER and LOSSNAY are changed after sequential operation of FRESH MASTER and LOSSNAY by remote controller 36 Same as mentioned in A7 of the previous page Error Code Abnormal point and detection method Case Judgment and action M NET NO RESPONSE Transmitting condition is Check t
115. ion wire Transmission signals may not be sent or received normally if different types of transmission wires are put together in the same multi conductor cable Never do this because this may cause a malfunction Grou remote controller Power supply unit for transmission wire Refrigerant address 00 M NET N address 01 A control remote controller address 02 E A control remote controller x WA Wa ijn tn Ng a I Refrigerant Refrigerant address 00 address 00 M NET M NET address 03 at A control remote controller It would be ok if M NET wire non polar 2 cores is arranged in addition to the wiring for A control 4 Ground only one of any appliances through M NET transmission wire shield wire Communication error may occur due to the influence of electromagnetic noise Ed error will appear on the LED display of outdoor unit 0403 error will appear on the central control remote controller X Bad example Multi spot grounding of shield wire Central remote controller Power supply M NET type outdoor unit M NET type outdoor unit M NET type outdoor unit appliance N A M NET transmission wire IN OGood example 1 Single spot grounding of shield wire Central remote controller Power supply appliance M NET type outdoor unit
116. is displayed when the operation mode is selected Initial setting value The automatic mode is not displayed when the operation mode is selected The temperature range limit is not active Initial setting value The temperature range can be changed on cooling dry mode The temperature range can be changed on heating mode The temperature range can be changed on automatic mode Automatic filter elevation panel up down operation mode Not necessary to set this mode Refer to OPERATION MANUAL of Optional Parts Panel for details on operation SET a Fixed air flow direction mode Not necessary to set this mode Refer to OPERATION MANUAL of indoor unit for details on operation Mode ODE CONTROLLER t PATROL The remote controller will be the main controller Initial setting value selection ELECTION mal D I COHTROLLER The remote controller will be the sub controller La 4 116 CLOCK The clock function can be used Initial setting value The clock function cannot be used IMER FET H EEKLY Weekly timer can be used Initial setting value MH EM TER i MEK y One of the ha m 3 description Iz PAGI TIFF Auto off timer can be used marked i i 6 onthe right 1 i i will be NGELE Simple timer can be used displayed current ri TIMER MODE Timer mode cannot be used setting La OFF ii The set contact numbers are not displayed in case of error I TO Initial setting value Vv The set contact nu
117. k transmission waveform or noise on transmission wire Hardware error of transmission Error is detected if waveform is If the works of transmission wire is done processor transformed when wiring works of with the power on turn off the power supply Transmission processor intended to trans transmission wire of outdoor unit of outdoor unit and indoor unit and FRESH mit 0 but 1 appeared on transmission indoor unit FRESH MASTER or MASTER or LOSSNAY at the same time for wire LOSSNAY are done or polarity is 2 minutes or more and turn the power on Note The address and attribute display at changed with the power on and again remote controller indicate the con transmission data collide each other oe troller that detected abnormality Defective transmitting receiving Check transmission waveform or noise on circuit of transmission processor transmission wire Transmission data is changed by the noise on transmission BUS BUSY Transmission processor could Check if transmission wire of indoor unit 1 Overtime error by collision damage not transmit signal because short FRESH MASTER LOSSNAY or remote con Abnormal if transmitting signal is not cycle voltage of noise and the troller is not connected to terminal block for possible for 8 10 minutes continuously like have entered into transmis central control TB7 of outdoor unit because of collision of transmission sion wire continuously Check if transmi
118. l if outdoor controller circuit board could not find blank of transmission path for 3 minutes Indoor outdoor unit connecting wire has contact failure Defective communication circuit of outdoor controller circuit board Noise has entered power supply Noise has entered indoor outdoor unit connecting wire Check disconnection or looseness of indoor outdoor unit connecting wire Turn the power off and on again to check Replace outdoor controller circuit board if abnormality is displayed again Non defined error code This code is displayed when non defined error code is received Noise has entered transmission wire of remote controller Noise has entered indoor outdoor unit connecting wire Outdoor unit is not a power inverter models Model name of remote controller is PAR S25A DE Turn the power off and on again to check Replace indoor controller board or outdoor controller circuit board if abnormality is displayed again Replace outdoor unit with power inverter type outdoor unit Replace remote controller with MA remote controller Serial communication error 1 Abnormal if serial communication between outdoor controller circuit board and outdoor power circuit board is defective 2 Abnormal if communication between outdoor controller circuit board and M NET board is not available OCH512 Breaking of wire or contact failure of connector CN2 between t
119. lay olo L Error content Error content Error content Detected Error content 6 Detected Display Overvoltage Undervoltage Li phase Power synchronizing Display Converter Fo PAM error error error open error signal error error 0 0 1 e 1 2 e 2 e 3 e e 3 e e 4 5 e e 6 e e 7 e e e 8 e 9 e A e e b e e e G e e d e e E e e F e e e OCH512 89 Contact demand capacity Request code 61 Setting content Data display o 0 0 x A Settin ka Setting content Display Setting value SW7 1 9 Sw72 0 0 1 50 ON 2 75 ON 3 100 ON ON External input state Request code 62 Input state 6 Input present Data display o 0 0 Dispi Contact demand Silent mode Spare 1 Spare 2 LT Input state SE input input input input 0 1 e 2 e 3 e e 4 e 5 e e 6 e e 7 e e e 8 e 9 e e A e e b e e e G e e d e e E e e e F e e e eo Outdoor unit Capacity setting display Request code 70 Data display Capacity 9 12 10 18 11 24 14 30 20 36 25 42 Outdoor unit Setting information Request code 71 Data display 9 9 x Setting information Displa Setting information D 5 4 Defrost mode Standard Setting information
120. le When 245 minutes 0 5 secs 0 5secs 2 secs 2 gt 45 gt Minute OCH512 Test run elapsed time 0 120 65 0 120 When it is 100 minutes or more the hundreds digit tens digit and ones digit are displayed by turns Example When 105 minutes 0 5secs 0 5secs 2 secs 1 gt 05 gt The black square m indicates a switch position SW2 setting Display detail Explanation for display The number of connected indoor units 0 3 The number of connected indoor units are displayed Capacity setting display Displayed as an outdoor capacity code Capacity Code Code A42N 25 display Outdoor unit setting information e The tens digit Total display for applied setting Setting details Display details H P Cooling only 0 H P 1 Cooling only Single phase 3 phase O Single phase 2 3 phase Code lt The ones digit display Setting details Display details Defrosting switch JO Normal 1 For high humidity Example When heat pump 3 phase and defrosting normal are set up 20 is displayed Indoor pipe temperature Liquid TH2 1 38 190 39 88C Indoor 1 When the temperature is 0 F or less and 38 190 temperature are displayed by turns Indoor pipe temperature Cond Eva 38 190 39 88C
121. lent mode etc Refer to 13 2 1 Detail Contentsin Request Code 63 64 65 66 67 68 69 70 Outdoor unit Capacity setting display Refer to 13 2 1 Detail Contentsin Request Code _ 71 Outdoor unit Setting information Refer to 13 2 1 Detail Contentsin Request Code _ 72 73 Outdoor unit SW1 setting information Refer to 13 2 1 Detail Contentsin Request Code _ 74 Outdoor unit SW2 setting information Refer to 13 2 1 Detail Contentsin Request Code _ 75 76 Outdoor unit SW4 setting information Refer to 13 2 1 Detail Contents in Request Code 77 Outdoor unit SW5 setting information Refer to 13 2 1 Detail Contents in Request Code 78 Outdoor unit SW6 setting information Refer to 13 2 1 Detail Contents in Request Code _ 79 Outdoor unit SW7 setting information Refer to 13 2 1 Detail Contentsin Request Code _ 80 Outdoor unit SW8 setting information Refer to 13 2 1 Detail Contentsin Request Code _ 81 Outdoor unit SW9 setting information Refer to 13 2 1 Detail Contentsin Request Code _ 82 Outdoor unit SW10 setting information Refer to 13 2 1 Detail Contentsin Request Code 83 84 M NET adapter connection presence absence kaka ababe _ 85 86 87 88 89 Display of execution of replace wash operation son ee _ 90 Outdoor unit Microprocessor version information Examples Ver 5 01 0501 Ver Auxiliary information displayed after 91 Outdoorunit Microprocessor version information sub No versio
122. mbers are displayed in case of error Display The temperature unit F is used Initial setting value mode setting The temperature unit C is used Room air temperature is displayed Initial setting value Room air temperature is not displayed NITA MADE One of Automatic cooling and Automatic heating is displayed LO under the automatic mode is running Initial setting value Only Automatic is displayed under the automatic mode OCH512 81 12 3 Function selection of IR wireless remote controller TEMPERATURE DISPLAY C F SETTING Change of temp mode from F to C D Press the set button with something sharp at the end MODEL SELECT blinks AUTOSTART Press the gt 1 button F blinks Press the button C blinks Press the set button with something sharp at the end MODEL SELECT is lighted for 3 seconds then turned off AN MITSUBISHI ELECTRIC CHECK STOP AMPM Neen SWING t START AMPM N aa mi NOT AVAILABLE O ON OFF TEMP ED AI FAN AUTO STOP RO 0O MODE AUTO START CHECK h res RU DO SET OCH512 82 13 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 13 1 HOW TO MONITOR THE OPERATION DATA Turn on the Monitoring the operation data
123. mum minimum 3 Mode selection MODE SELECTION 1 2 3 Temperature range limit setting LIMIT TEMP FUNCTION 1 Remote controller main sub setting CONTROLLER MAIN SUB Selecting main or sub remote controller When two remote controllers are connected to one group one controller must be set to sub 2 Use of clock setting CLOCK e Setting the use or non use of clock function 3 Timer function setting WEEKLY TIMER e Setting the timer type 4 Contact number setting for error situation CALL Contact number display in case of error e Setting the telephone number 4 Display change DISP MODE SETTING 1 Temperature display C F setting TEMP MODE C F Setting the temperature unit C or F to display 2 Room air temperature display setting ROOM TEMP DISP SELECT Setting the use or non use of the display of indoor room air temperature 3 Automatic cooling heating display setting AUTO MODE DISP C H Setting the use or non use of the display of Cooling or Heating display during operation with automatic mode Function selection flowchart Refer to next page 1 Stop the air conditioner to start remote controller function selection mode 2 Select from item1 gt 3 Select from item2 gt 4 Make the setting Details are specified in item3 5 Setting completed 6 Change the display to the normal one
124. n If mal function was accidental the unit returns to normal Check address switch of abnormality gener ated address Check disconnection or looseness of abnor mality generated or abnormality detected transmission wire terminal block and con nector Check if tolerance range of transmission wire is not exceeded Check if type of transmission wire is correct or not If there were some troubles of D above repair the defective then turn off the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more and turn the power on again lt If there was no trouble with above in single refrigerant system one outdoor unit controller of displayed address or attribute is defective lt If there was no trouble with above in dif ferent refrigerant system 2 or more outdoor units judge with If address of abnormality source is the address that should not exist there is the unit that memorizes nonexistent address information Delete useless address informa tion with manual setting function of remote controller Only the system FRESH MASTER or LOSSNAY are connected to or the system that is equipped with group setting of differ ent refrigerant system If there was no trouble with D above replace the controller board of displayed address or attribute If the unit does not return to normal multi con troller board of outdoor unit may b
125. n earth longer than other cables OCH512 14 8 3 INDOOR OUTDOOR CONNECTING CABLE Wire No x Size Outdoor power supply Max 45m 147ft Max 50m 164ft Max 80m 262ft Indoor unit Outdoor unit 3 x AWG16 polar 3 x AWG13 polar 3 x AWG13 polar and S3 separated x The max cable length may vary depending on the condition of installation humidity or materials etc Indoor Outdoor separate Wire No x Size power supply Max 120m 393ft Indoor unit Outdoor unit 2 x Min AWG22 x The optional indoor power supply terminal kit is necessary Be sure to connect the indoor outdoor connecting cables directly to the units no intermediate connections Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the intermediate connection point OCH512 15 8 4 M NET WIRING METHOD Points to note 1 Outside the unit transmission wires should stay away from electric wires in order to prevent electromagnetic noise from making an influence on the signal communication Place them at intervals of more than 5 cm Do not put them in the same conduit tube 2 Terminal block TB7 for transmission wires should never be connected to 208 230V power supply If it is connected electronic parts on M NET P C board may burn out 3 Use 2 core x 1 25mm2 AWG16 shield wire CVVS CPEVS for the transmiss
126. n if the data changes To display the updated data carry out step 4 again Canceling the Monitoring the operation data 6 While Maintenance monitor is displayed press the CHECK button for 3 seconds to return to maintenance mode 7 To return to normal mode press the _D ON OFF button OCH512 83 13 2 REQUEST CODE LIST Certain indoor outdoor combinations do not have the request code function therefore no request codes are displayed S 8 ae 5 Request content Deseriplisn Unit Remarks Display range a 0 Operation state Referto 13 2 1 Detail Contents in Request Code _ 1 Compressor Operating current rms 0 50 A 2 Compressor Accumulated operating time 0 9999 10 hours 3 Compressor Number of operation times 0 9999 100 times 4 Shell temperature TH32 37 327 E 5 Outdoor unit Liquid pipe 1 temperature TH3 40 194 F 6 Outdoor unit Liquid pipe 2 temperature 40 194 F 7 Outdoor unit 2 phase pipe temperature TH6 38 190 oF 8 9 Outdoor unit Outside air temperature TH7 38 190 F 10 Outdoor unit Heatsink temperature TH8 40 327 SE 11 12 Discharge super heat SHd 0 327 F 13 Sub cool SC 0 234 F 14 15 16 Compressor Operating frequency 0 255 Hz 17 Compressor Target op
127. n information gt Examples Ver 5 01 A000 A000 92 93 94 95 96 97 98 99 A Displays postponement code is 100 Outdoor unit Error postponement history 1 latest Y N Code displayed if no postponement code is present 101 Outdoor unit Error postponement history 2 previous Pepak postponement ae tl I i Code displayed if no postponement code is present A Displays postponement code is 102 Outdoor unit Error postponement history 3 last but one Code displayed if no postponement code is present OCH512 85 T 8 Je Request content Description Unit Remarks Display range aa 103 Error history 1 latest Displays error history is displayed if no history is present Code 104 Error history 2 second to last Displays error history is displayed ifno history is present Code 105 Error history 3 third to last Displays error history is displayed if no history is present Code 3 TH3 He Abnormal thermistor display l djs Sensor TH3 TH6 TH7 TH8 8 THE number 0 No thermistor error 107 Operation mode at time of error Displayedin the same way as request code 0 108 Compressor Operating current at time of error 0 50 A 109 Compressor Accumulated operating time at time of error 0 9999
128. nd signal is caused by over numbered units Accidental malfunction of abnormality detected controller noise lightning surge Defective of abnormality gen erated controller If displayed address or attribute is out door unit Indoor unit detects abnormality when indoor unit transmitted to outdoor unit and there was no reply ACK Contact failure of transmission wire of outdoor unit or indoor unit Disconnection of transmission connector CN2M of outdoor unit Defective transmitting receiving circuit of outdoor unit or indoor unit If displayed address or attribute is indoor unit remote controller detects abnormal ity when remote controller transmitted to indoor unit and there was no reply ACK OCH512 During group operation with indoor unit of multi refrigerant system if remote controller transmit to indoor unit while outdoor unit power supply of one refrigerant system is turned off or within 2 min utes of restart abnormality is detected Contact failure of transmission wire of remote controller or indoor unit Disconnection of transmission connector CN2M of indoor unit Defective transmitting receiving circuit of indoor unit or remote controller 35 Always try the followings when the error A7 occurs Turn off the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more and turn the power on agai
129. ng display setting To switch the setting press the ON OFF button ON One of Automatic cooling and Automatic heating is displayed under the automatic mode is running OFF Only Automatic is displayed under the automatic mode CALL_ 80 Function selection flowchart Normal display Setting language English Display when the air conditioner is not running Hold down the button and press the button for 2 seconds Hold down the button and press the button for 2 seconds 6 Press the operation mode button Press theTIMER MENU button e g tea OMONG po Sr function Selection mode Press theTIMER ON OFF button Change English h Language Dot display Geman A MITSUBISHI ELECTRIC Linea Spanish Russian O AD Italian 6 YA NGUAGE EE ee EE Chinese a a BAG French Japanese Function Operation lock setting is not used selection Initial setting value All operation buttons except On Off button are locked All operation buttons are locked The automatic mode
130. ng pressure of R410A is higher compared to R22 be sure to use refrigerant piping with thickness shown below Never use pipes of 0 7 mm 7 256 inch or below Diagram below Piping diameter and thickness Nominal Outside Thickness mm inch dimensions inch diameter mm R410A R22 1 4 6 35 0 8 1 32 0 8 1 32 3 8 9 52 0 8 1 32 0 8 1 32 1 2 12 70 0 8 1 32 0 8 1 32 5 8 15 88 1 0 5 128 Dimensions of flare cutting and flare nut The component molecules in HFC refrigerant are smaller compared to conventional refrigerants In addition to that R410A is a refrigerant which has higher risk of leakage because of its working pressure is higher than that of other refrigerants Therefore to enhance air tightness and intensity flare cutting dimension of copper pipe for R410A has been specified separately from the dimensions for other refrigerants as shown below The dimension B of flare nut for R410A also has partly been changed to increase intensity as shown below Set copper pipe correctly referring to cop per pipe flaring dimensions for R410A below For 1 2 and 5 8 inch the dimension B changes Use torque wrench corresponding to each dimension Dimension A N 2 Dimension B Flare cutting dimensions Unit mm inch Flare nut dimensions Unit mm inch Nominal Outside Dimension A 94 Nominal Outside Dimension B dimensions inch diameter R410A R22 dimensions inch diameter R410A 9 1 11 32 23
131. ng to maintenance mode Maintenance mode can be activated either when the air conditioner is operated or stopped It cannot be activated during test run Maintenance information can be viewed even if the air conditioner is stopped E Remote controller button information afa MITSUBISHI ELECTRIC gt Operation mode Compressor information Outdoor unit information Indoor unit information Canin Tift GO38 OMENU OON OFF Gal is FILTER G G G Gs s a 39Ca CHECK TEST a gt GB GDB PAR 21MAA CLEAR Activate cancel maintenance mode 1 Press the TEST button for 3 seconds to switch to maintenance mode Display MAINTENANCE If stable operation is unnecessary or if you want to check the data with the air conditioner stopped skip to step 4 Fixed Hz operation The operating frequency can be fixed to stabilize operation of inverter model If the air conditioner is currently stopped start it by this operation 2 Press the MODE button to select the desired operation mode Stable cooling Stable heating Stable operation Display operation gt operation gt cancellation COOL HEAT STABLE MODE STABLE MODE STABLE MODE CANCEL 3 Press the FILTER button to check the setting Display Waiting for stabilization o gt s ago CM gt Stabilized ooo After 10 to 20 minutes OCH512 72 Data measurement When the operation is stabilized measu
132. nt sensor detects 1 5A to 1 5A during compressor operation This error is ignored in case of test run mode x This error is ignored in case of test run mode lt It s abnormal for 38A the input current or 10 seconds continuous 34A or more OCH512 Disconnection of compressor wiring Defective circuit of current sensor on outdoor power circuit board Decrease of power supply voltage 31 Correct the wiring U V W phase to compressor Refer to 10 9 Outdoor power circuit board Replace outdoor power circuit board Check the facility of power supply Error Code Abnormal point and detection method Case Judgment and action Compressor overcurrent interruption Abnormal if overcurrent DC bus or com pressor is detected after compressor starts operating for 30 seconds Stop valve of outdoor unit is closed Decrease of power supply volt age Looseness disconnection or converse of compressor wiring connection Defective fan of indoor outdoor units Short cycle of indoor outdoor units Defective input circuit of out door controller board Defective compressor Open stop valve Check facility of power supply Correct the wiring U V W phase to compressor Refer to 10 9 Outdoor power circuit board Check indoor outdoor fan Solve short cycle Replace outdoor controller circuit board Check compressor Refer to 10 6 x Before the re
133. o Power supply for out door controller circuit board 208V 230V AC Oto Power supply for indoor and outdoor unit con nection wire 208 230V AC S1 S2 A208 230V AC supply Outdoor noise filter circuit board PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS sanggan O O oO Oo CE o a aj O RS1 Ja oS jo Fo ooo Stos Sho ss bil dod am 9090 Bodo eee 8 CNAC1 CNAC2 208 230V AC Connect to the outdoor control ler circuit board CNAC El Connect to the earth Heslo Een a boo bai I oro C LI NI F lt CN52C 52C driving signal Connect to the outdoor controller circuit board CN52C LO NO Voltage of 208 230V AC is output Connect to the outdoor power circuit board TABS TABT E2 Connect to the earth ONG Primary current Connect to the outdoor power circuit board CN5 O 7 Voltage of 208 230V AC is input Connect to the terminal block TB1 OCH512 55 Outdoor power circuit board PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS CN2 Connect to the outdoor controller circuit board CN2 Transmitting signal to the outdoor controller circuit board 0 5V DC Zero cross signal 0 5V DC Brief check of POWER MODULE 1 Check of diode bridge 2 Check of DIP IPM P U P V P W N U N V N W x Usually they are in a state of b
134. o 6 in the SW2 are set to OFF 1 Display when the power supply ON 1 second When the power supply ON blinking displays by turns interval Wait for 4 minutes at the longest 2 When the display lights Normal operation Operation mode display Lighting LED1 Dt wa Initial setting PA gt The tens digit Operation mode The ones digit Relay output Display Operation Model Warming up Compressor OFF FAN COOLING DRY HEATING DEFROSTING Display during error postponement Postponement code is displayed when compressor stops due to the work of protection device Postponement code is displayed while error is being postponed Display Compressor 4 way valve Solenoid valve ON ON ON ON ON gt O ODE WIN JO 3 When the display blinks Inspection code is displayed when compressor stops due to the work of protection devices Contents to be inspected During operation Abnormal high pressure 63H operated Abnormal high discharging temperature shortage of refrigerant Open short circuit of shell thermistor TH32 Open short of outdoor unit thermistors TH3 TH6 TH7 and TH8 Abnormal temperature of heatsink Abnormality of power module Abnormality in outdoor fan motor Compressor overcurrent interruption When Comp locked Current sensor error Compressor overcurrent interruption Indoor uni
135. ocess will begin Display self diagnosis results lt When there is error code history gt For the definition of each error code refer to the indoor unit s installation manual or service handbook Alternating Display SELF CHECK ee ZELF CHECK Dr en Pat zi INN n f ZIET min Sie N LILI o Error code 2 or 4 TEN Address 3 digits or unit number 2 digits lt When there is no error code history gt lt When there is no corresponding unit gt EELFCHECK gt 4 A SELF CHECK gt ERROR GORE as nn i nn wu wu Reset the error history Display the error history in the diagnosis result display screen see step I _ ZELF CHECK ennan Gope lt gt emangebe nn Sits on pi LILI LILI OCH512 23 ahi When the error history is reset the display will look like the one shown below h I f P ss the ON OFF SEON nen Second However if you fail to reset the error history the error content will be displayed again The self diagnosis address or refrigerant address will blink SELE CHECK am SELFCHECK D gt ERROR GORE nn EP nn _ LILI o LILI Cancel self diagnosis Self diagnosis can be cancelled by the following 2 methods Press the CHECK button twice within 3 seconds gt Self diagnosis will be cancelled and the screen will return to the previous state in effect before the start of self diagnosis
136. odel Select gt When M NET adapter is connected 63H LEV A TH32 TH7TH6 TH3 LE M t A C B 5 fto tj t i Kal meri 1 CIT A seek es 606666 eee pees vl Se 1 7 21 1 6 s z MS ii TH32 TH7 6 TH3 LEV A CNVMNTCNMNT 5 MNETADAE TER BLK RED WHT WHT WHT WHT e lor i 323E PR oes 5E MEE ee Hien ma L001 aaa rai Some Beb YA 5e 63H WHT B CN31 2 eee YLW CN52C a i CN4 RE
137. of outdoor power circuit board Failure of outdoor fan drive circuit ME Check outdoor fan Check airflow path for cooling Check if there is something which causes temperature rise around outdoor unit Upper limit of ambient temperature is 46 C 114 F Turn off power and on again to check if U5 is displayed within 30 minutes If U4 is displayed instead of U5 follow the action to be taken for U4 Check resistance value of thermistor TH8 or temperature by microprocessor Thermistor TH8 Refer to 10 6 SW2 on A Control Service Tool Refer to 10 10 Replace outdoor power circuit board Replace outdoor controller circuit board Power module Check abnormality by driving power module in case overcurrent is detected UF or UP error condition OCH512 Outdoor stop valve is closed Decrease of power supply voltage Looseness disconnection or converse of compressor wiring connection Defective compressor Defective outdoor power circuit board 30 Open stop valve Check facility of power supply Correct the wiring U V W phase to compressor Refer to 10 9 Outdoor power circuit board Check compressor referring to 10 6 Replace outdoor power circuit board Error Code Abnormal point and detection method Case Judgment and action Outdoor fan motor Abnormal if the rotational frequency of fan motor is not detected during DC fan motor operati
138. om temperature reaches the set temperature and the outdoor unit stops the unit starts the LOW AIR operation 3 During the HEAT operation the DEFROST operation is performed to defrost the outdoor unit During the DEFROST operation the fan is stopped to prevent cold air coming out of the indoor unit 44 The up down vane will be automatically set to horizontal blow in these cases listed up on the left 1 3 After a while the up down vane will be automatically moved according to the setting of the remote controller Phone Calls From Customers How to Respond Note Air blows out for a while after HEAT operation is stopped Something is wrong with the blower This is not a malfunction The blower is operating just for cooling down the heated up air conditioner This will be done within 1 minute This control is conducted only when the HEAT operation is stopped with the electric heater ON However this control is also applied to the models which has no electric heater Something is wrong with the airflow direction The airflow direction is changed during COOL operation If the up down vane is set to downward in COOL operation it will be automatically set to horizontal blow by the microprocessor in order to prevent water from dropping down 1 Hr will be displayed on the remote controller if the up down vane is set to downward with the fan speed set to be less than
139. ompleting function selection No operations will be accepted even if they are made Note If a function of an indoor unit is changed by function selection after installation is complete make sure that a O mark etc is given in the Check column of Table 1 to indicate the change OCH512 78 12 1 2 Selecting functions using the IR wireless remote controller Type C Functions can be selected with the IR wireless remote controller Function selection using IR wireless remote controller is available only for refrigerant system with wireless function Refrigerant address cannot be specified by the IR wireless remote controller Flow of function selection procedure The flow of the function selection procedure is shown below This example shows how to turn off the function that raises the set temperature by 4 degrees during HEAT operation F The procedure is given after the flow chart MITSUBISHI ELECTRIC Li Check the function selection setting A Switch to function selection mode Troubleshooting mode is the mode entered when Enter address 50 in troubleshooting you press the CHECK button twice to display mode then press the HOUR button CHECK ON OFF amp TEMP Specify unit No 01 since the function applies to unit 01 Set address 01 while still in troubleshooting mode then press the MINUTE button A j YES Note You can t specify the refriger
140. on Fan motor rotational frequency is abnormal if e 100 rpm or below detected continuously for 15 seconds at 20 C 68 F or more outside air temperature 50 rpm or below or 1500 rpm or more detected continuously for 1 minute O Failure in the operation of the DC fan motor Failure in the outdoor circuit controller board Check or replace the DC fan motor Check the voltage of the outdoor circuit controller board during operation Replace the outdoor circuit controller board when the failure is still indicated even after performing the action above Overvoltage or voltage shortage and synchronous signal to main circuit Abnormal if any of followings are detected during compressor operation e Decrease of DC bus voltage to 310V Instantaneous decrease of DC bus voltage to 200V e Increase of DC bus voltage to 400V e Decrease of input current of outdoor unit to 0 5A only if operation frequency is more than or equal to 40Hz or compressor current is more than or equal to 5A e Abnormal power synchronous zero cross signal Decrease of power supply voltage Disconnection of compressor wiring Disconnection or loose connection of CN52C Defective ACT module Defective ACT module drive circuit of outdoor power circuit board Disconnection or loose connection of CNAF Defective 52C drive circuit of outdoor noise filter circuit board Disconnection or loose connection of CN5
141. on outdoor controller board Disconnection or contact failure of 63H connection 9 Defective outdoor controller board Defective action of linear expansion valve Malfunction of fan driving circuit Check indoor unit and repair the defect Check if stop valve is fully open Check piping and repair the defect Check outdoor unit and repair the defect Check the inspected temperature of outside temperature thermistor on LED display SW2 on A Control Service Tool Refer to 10 10 Turn the power off and check F5 is displayed when the power is on again When F5 is displayed refer to Judgment and action for F5 Check linear expansion valve Refer to 10 6 7 Replace outdoor controller board U2 TH32 1132 High comp shell temperature Abnormal if comp shell temperature thermistor TH32 exceeds 125 C 257 F Overheated compressor opera tion caused by shortage of refrigerant Defective operation of stop valve Defective thermistor Defective outdoor controller board Defective action of linear expansion valve Check intake superheat Check leakage of refrigerant Charge additional refrigerant Check if stop valve is fully open DO Turn the power off and check if U3 is dis played when the power is on again When U3 is displayed refer to Judgement and action for U3 Check linear expansion valve Refer to 10 6 7 U3 TH32 5
142. ontents Inspection method Detailed reference page 3 blinking 1 blinking Abnormality of shell thermistor TH32 Check if stop valves are open Check if connectors TH32 LEV A on outdoor controller board are not disconnected Check if unit is filled with specified amount of refrigerant Measure resistance values among terminals on indoor valve and outdoor linear expansion valve using a tester P 29 2 blinking Abnormal high pressure High pressure switch 63H operated Check if indoor outdoor units have a short cycle on their air ducts Check if connector 63H on outdoor controller board is not disconnected Check if heat exchanger and filter is not dirty Measure resistance values among terminals on linear expansion valve using a tester 3 blinking Abnormality of outdoor fan motor rotational speed Check the outdoor fan motor 4 blinking Compressor overcurrent breaking Start up locked Compressor overcurrent breaking Abnormality of current sensor P B Abnormality of power module Check if stop valves are open Check looseness disconnection and converse connection of compressor wiring Measure resistance values among terminals on compressor using a tester Check if outdoor unit has a short cycle on its air duct 5 blinking Open short of shell thermistor TH32 Open short of outdoor thermistors TH3 TH6 TH7 and TH8 Check if connectors TH
143. or Cond Eva pipe temperature at time of error 38 190 F Average value of all indoor units is displayed if the air condi tioner consists of two or more indoor units twin triple quad 134 Indoor at ime of error 38 190 F Intake air temperature lt Thermostat judge temperature gt 135 136 137 138 139 140 146 147 148 149 150 Indoor Actual intake air temperature 38 190 F 151 Indoor Liquid pipe temperature 38 190 F 152 Indoor Cond Eva pipe temperature 38 190 F OCH512 86 D D Q Oo ET pa Description B Request content Unit Remarks Display range o 153 F Te 154 poor an operating time 0 _ 9999 T HA After filter is reset Total ing ti 155 ndoor Total operating time 0 _ 9999 TO hours Fan motor ON time 156 157 Indoor fan output value Sj value 0 255 Fan control data _ For indoor fan phase control ndoor fan output value 158 j PES Kan 00 indicates fan control data _ For indoor fan pulsation control Pulsation ON OFF 159 Indoor fan output value duty value 00 indicates fan control data _ For indoor DC brushless motor control 160 161 162 Indoor unit Model setting information Referto 13 2 1 Detail Contentsin Request Code 163 Indoor unit Capacity setting information Referto 13 2 1 Detail Contentsin Request Code 164 Indoor unit SW3 information Undefined _ 16
144. or status during the Error postponement period OCH512 Description Detection point Display Normal 00 Overvoltage error Power circuit board 01 Undervoltage error Controller circuit board 02 Input current sensor error Controller circuit board 04 L1 or L2 phase open error Abnormal power synchronous signal Power circuit board 08 Check CNAF wiring Defective ACTM P B PFC ACTM error 20 Undervoltage Display examples for multiple errors Overvoltage 01 Undervoltage 02 03 Undervoltage 02 Power sync signal error 08 0 L phase open error 04 PFC error 10 14 70 Code display The black square m indicates a switch position SW2 setting Display detail Explanation for display Controlling status of compressor The following code will be a help to know the operating frequency operating status of unit The tens digit Compressor operating freguency control Primary current control Secondary current control The ones digit In this digit the total number of activated control is displayed Compressor operating freguency control Preventive control for excessive temperature rise of discharge temperature Preventive control for excessive temperature rise of condensing temperature Frosting preventing control Preventive control for excessive temperature rise of heatsink Example The following controls are activated e Pr
145. placement of the outdoor controller circuit board disconnect the wiring to compressor from the outdoor power circuit board and check the output voltage among phases U V W during test run No defect on board if voltage among phases U V V W and W U is same Make sure to perform the voltage check with same performing frequency Remote controller transmission error E0 signal receiving error E4 Abnormal if main or sub remote control ler cannot receive normally any trans mission from indoor unit of refrigerant address 0 for 3 minutes Error code EO Abnormal if sub remote controller could not receive for any signal for 2 minutes Error code EO Abnormal if indoor controller board can not receive any data normally from remote controller board or from other indoor controller board for 3 minutes Error code E4 Indoor controller board cannot receive any signal from remote controller for 2 minutes Error code E4 Contact failure at transmission wire of remote controller All remote controllers are set as sub remote controller In this case EO is displayed on remote controller and E4 is displayed at LED LED1 LED2 on the outdoor controller circuit board Miswiring of remote controller Defective transmitting receiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board of refrigerant address 0 Noise has entered into
146. r lt Refer to Self diagnosis i displayed on the LED outdoor connecting action table in order to wire solve the trouble NO e Breaking of indoor outdoor connecting In case of communication wire S3 errors the display of e Defective indoor remote controller may not controller board match the LED display of e Defective outdoor the outdoor unit controller circuit board lt Defective indoor controller board Defective remote controller OCH512 39 LED display of the indoor controller board LED1 LED2 o LED3 Symptoms Nothing is displayed on the remote controller D Inspection method and Diagnosis flow troubleshooting Check the voltage between S1 and S2 on the terminal block TB4 of the indoor unit AC 187V to AC 253V NG Check the voltage among L1 and L2 on the terminal block TB1 of the YES outdoor power circuit board AC 187V to AC 253V e Troubles concerning Check the power wiring power supply to the outdoor unit e Check the breaker Check the voltage between S1 and S2 on the terminal block TB1 of the outdoor unit which is used to connect the indoor unit and the outdoor unit AC 187V to AC 253V NO Bad wiring of the e Check the wiring of the outdoor controller outdoor unit board e Check if the wiring is bad YES The fuses on the Check if the fuses are blown Check the voltage of indoor outdoor T
147. r gt TH7 1 Remove the service panel See Figure 1 2 Remove the top panel See Figure 1 3 Disconnect the connector TH7 red on the controller circuit board in the electrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 4 5 Pull out the thermistor lt Outdoor gt TH7 from the sensor holder Note In case of replacing thermistor lt Outdoor gt TH7 replace it together with thermistor lt Outdoor 2 phase pipe gt TH6 since they are combined together Refer to No 4 above to remove thermistor lt Outdoor 2 phase pipe gt Photo 5 Lead wire of thermistor lt Outdoor gt TH7 Sensor holder 6 Removing the thermistor lt Outdoor pipe gt TH3 and thermistor lt Shell gt TH32 1 Remove the service panel See Figure 1 2 Disconnect the connectors TH3 white and TH32 black on the controller circuit board in the electrical parts box 3 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 4 4 Pull out the thermistor lt Outdoor pipe gt TH3 and thermistor lt Shell gt TH32 from the sensor holder Photo 6 Thermistor lt Shell gt TH32 Thermistor lt Outdoor pipe gt TH3 Compressor MC OCH512 94 OPERATING PROCEDURE PHOTOS 7 Removing the 4 way valve coil 21S4 and linear expansion valve coil LEV A 1 Remove the service panel See Figure 1
148. r supply Option Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units Simultaneous twin system Outdoor unit power supply Wiring circuit breaker or isolating switch iz e 551 Outdoor unit of HI Indoor unit outdoor unit connecting cords 5 Hm Remote controller aa 5 y O Indoor unit KA Indoor unit power supply Option Indoor unit earth Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units If the indoor and outdoor units have separate power supplies refer to the table below Change the indoor unit electrical box wiring refering to the figure in the right and If the indoor and the DIP switch settings of the outdoor unit control board Connectors connections when outdoor units have shipped from the factory are or indoor unit power supplied separate power Indoor unit specifications rom outdoor unit supplies change the connections of the connectors as shown Indoor unit electrical box connector con h B Required nection change in the following Label affixed near each wiring diagram Required ewo figure for the indoor and outdoor units Indoor unit St Outdoor unit DIP switch settings when 5 control board using separate indoor unit outdoor unit MOTA ama MOTA ana S3 C
149. raft Upward position than the standard Upward position than the standard Vane No 2 setting Be careful of the smudge on ceiling OCH512 76 12 1 1 Selecting functions using the wired remote controller First try to familiarize yourself with the flow of the function selection procedure In this section an example of setting the room temperature detection position is given For actual operations refer to steps D to 0 Setting number Refrigerant address Unit number Mode number gt he MITSUBISHI ELECTRIC OD ES ot 888 88 ab Ra Joe DN ne YENG ka all Si os Ce GE Ea 2 za Modes 01 to 14 can be activated Gv CA by pressing buttons and PAR 21MAA CLOCK an CLEAR simultaneously and modes 15 to 1 28 by pressing buttons and Q sid C D Selecting functions using the wired remote controller Check the function selection setting Switch to function setting mode gt lt X For modes 15 and higher Press and at the same time with stop the remote controller press and at the same time Specify refrigerant address 00 outdoor unit Specify unit No 00 indoor unit Use and Specified indoor unit Enter the setting FAN operation Press Change refrigerant Select mode No 02 address or
150. ransmission waveform or noise on Abnormal if a message was transmitted repeated fault because of transmission wire and there were reply ACK that message noise and the like Turn off the power supply of outdoor unit was received but response command Extension of transmission wire and indoor unit and FRESH MASTER or does not return Transmitting side detects voltage and signal is caused LOSSNAY at the same time for 2 minutes or abnormality every 30 seconds 6 times by over range transmission more and turn the power on again If mal continuously WIS function was accidental the unit returns to Note The address and attribute displayed ere distance 200m normal If the same abnormality generates at remote controller indicate the con lt Remote controller line 12m again controller of displayed address and troller that did not reply ACK 39ft attribute may be defective Extension of transmission wire voltage and signal is caused by type unmatched transmis sion wire With shield wire CVVS CPEVS With normal wire no shield VCTF VCTFK CVV CVS VVR VVF VCT Diameter 1 25mm2 AWG16 or more Accidental malfunction of abnormality generated controller 10 5 TROUBLESHOOTING BY INFERIOR PHENOMENA Phenomena Factor Countermeasure 1 Remote controller display does not DC12V is not supplied to remote controller Check LED2 on indoor controller board work Power supply display is not indicated on LC
151. rced compressor stop due to water leakage abnormality As for indoor 6 P6 Freezing Overheating protection operation unit reler to 7 EE Communication error between indoor and outdoor units manor umts 8 P8 Pipe temperature error service manual 9 E4 E5 Remote controller signal receiving error 10 11 12 Fb Indoor unit control system error memory error etc _ EO E3 Remote controller transmission error E1 E2 Remote controller control board error Output pattern B Errors detected by unit other than indoor unit outdoor unit etc IR wireless remote controller Wired remote controller Beeper sounds OPERATION Symptom Remark INDICATOR lamp blinks Check code Number of times 1 E9 Indoor outdoor unit communication error Transmitting error Outdoor unit 2 UP Compressor overcurrent interruption 3 U3 U4 Open short of outdoor unit thermistors 4 UF Compressor overcurrent interruption When compressor locked 5 U2 Abnormal high discharging temperature insufficient refrigerant Abnormal high pressure 63H operated Overheating es eal eek 8 U1 Ud protection operation stare JAA 7 U5 Abnormal temperature of heatsink Kak saa 8 U8 Outdoor unit fan protection stop 9 U6 Compressor overcurrent interruption Abnormal of power module 1 U9 UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit Current sensor error 12 13
152. re operation data as explained below 4 Press the TEMP buttons Cv and CA to seleci the desired refrigerant address Screen i og lt gt gt lt gt 5 5 Select ihe type of data to be displayed After selecting go to step 6 Compressor information MENU button D Cumulative _ gt ON OFF Number gt Operating current Display operation time COMP ON COMP ON COMP ON x10 HOURS x100 TIMES CURRENT A Outdoor unit information ON OFF button Heat exchanger gt Comp discharge y Outdoor ambient Display temperature temperature temperature OUTDOOR UNIT OUTDOOR UNIT OUTDOOR UNIT H EXC TEMP OUTLET TEMP OUTDOOR TEMP Indoor unit information button Indoor room Heat exchanger Filter operatin OD ger gt perang A temperature temperature time Display INDOOR UNIT INDOOR UNIT INDOOR UNIT INLET TEMP H EKC TEMP FILTER USE H 6 Press the FILTER a button to check the setting Display example for accumulated operating time vila Display ZS Flashing ws After approx 12 340 hours 10 seconds Waiting for response 7 Data is displayed on the display at To check the data for each item repeat steps 5 to 7 8 To cancel maintenance mode press the TEST button for 3 seconds or press the O ON OFF button E Refrigerant address Single refrigerant system
153. s Outdoor controller circuit board TH3 TH6 TH7 Outdoor power circuit board CN3 Defective thermistor Defective outdoor controller circuit board Name Open detection Check connection of connector TH3 TH6 TH7 on the outdoor controller circuit board Check connection of connector CN3 on the outdoor power circuit board Check breaking of the lead wire for thermistor TH3 TH6 TH7 TH8 Refer to 10 9 Check resistance value of thermistor TH3 TH6 TH7 TH8 or check temperature by microprocessor Thermistor TH3 TH6 TH7 TH8 Refer to 10 6 SW2 on A Control Service Tool Refer to 10 10 Replace outdoor controller circuit board Emergency operation is available in case of abnormalities of TH3 TH6 and TH7 Refer to 10 8 Short detection Thermistor lt Outdoor pipe gt 40 C 40F or below 90 C 194 F or above Thermistor lt Outdoor 2 phase pipe gt 40 C 40F or below 90 C 194 F or above Thermistor lt Outdoor gt 40 C 40F or below 90 C 194 F or above Thermistor lt Heatsink gt 27C 17 F or below 102C 216 F or above Temperature of heatsink Abnormal if heatsink thermistor TH8 detects temperature indicated below 84 C 183 F The outdoor fan motor is locked Failure of outdoor fan motor Air flow path is clogged Rise of ambient temperature Defective thermistor Defective input circuit
154. s normal not open short that data is loaded into the control as valid data When the unit enters emergency operation and TH values are mismatched set the thermistors to open short And the unit runs emergency operation with the values listed above 2 If one thermistor is set to open short the values of SHd SC will be different from the list above Example When liquid temperature thermistor TH3 has an open or short circuit Thermistor COOL HEAT TH3 45 C 113 F 5C 41 F Ta Tb TH6 Regard normal figure as effective data Tc Td Regard normal figure as effective data 5C 41 F 50 C 122 F 5C 41 F 45 C 113 F Discharge superheat SHd Cooling TH32 TH6 Tc Ta Heating TH32 TH5 Td 50 C or 122 F Degree of subcooling SC Cooling TH6 TH3 Ta 45 C or 113 F Heating TH5 TH2 50 C 45 C 5 C or 122 F 113 F 9 F OCH512 53 10 9 TEST POINT DIAGRAM Outdoor controller circuit board PUZ A42NHA5 BS PUY A42NHA5 BS PUZ A42NHA5 PUY A42NHA5 SW7 Demand control setting SW1 lt CAUTION gt TEST POINTO is high voltage Forced defrost detect history record reset refrigerant address SW6 Model select SW4 Test operation SWP Pump down SW5 Function switch SW8 Wiring replace CNM W Connect to A control service tool CNMNT Connect to if M NET adapter CND Linear
155. ses to 00 if the group set ting is not conducted Set the refrigerant address by using DIP SW1 3 to 6 on the outdoor controller board Initial setting all switches are OFF All refrigerant addresses are 00 NOOOOO0 OOBOO0 OOO8OO NOOR BOO OO0O8O ov J Im mi our imami o mam OFF Pee or BEONE Jo EERE o BEONE EEEN or OO or C C N EEDE T23 456 123456 123456 123456 123456 123456 123456 123456 Refrigerant 0 1 2 3 4 5 6 7 address ox Il Im NOOmOOmN JODOmON NOOmBOR maa Aaa jmi awa AA am E E OFF MENEM jor LAS UASI OO ore OO ore OO oF OO jor OO orl BOOD 123456 123456 123456 123456 123456 T23456 123456 123456 8 9 10 11 12 13 14 15 8 4 3 Regulations in address settings In case of multiple grouping system M NET and refrigerant address settings should be done as explained in the above sec tion Set the lowest number in the group for the outdoor unit whose refrigerant address is 00 as its M NET address Group A Group B Group G B N Ni i ma Refrigerant mmi Refrigerant I Refrigerant System J address 00 address 01 address 00 gonuorer hay M NET M NET M NET Power address 02 address 03 address 04 supply unit for transmission wire m A control m A control A control remote remote remote controller J controller JJ controller j Refrigerant 7 Refri
156. ssion wire of indoor unit 2 Data could not reach transmission wire Transmission quantity has _ FRESH MASTER or LOSSNAY is not con for 8 10 minutes continuously because increased and transmission is nected to terminal block for transmission wire not possible because there was wiring mistake of terminal block for transmission wire TB3 and terminal block for central control TB7 in outdoor unit Transmission are mixed with Check if terminal block for transmission wire others and occupation rate on TB3 and terminal block for central control transmission wire rose because TB7 are not connected of defective repeater a function Check transmission waveform or noise on to connector or disconnect trans transmission wire mission of control and central control system of outdoor unit then abnormality is detected OCH512 34 of noise or etc Note The address and attribute displayed at remote controller indicate the con troller that detected abnormality of outdoor unit Error Code Abnormal point and detection method Case Judgment and action Communication error with communica tion processor Defective communication between unit processor and transmission processor Note The address and attribute display at remote controller indicate the con troller that detected abnormality Data of transmission proces sor or unit processor is not transmitted normally because of accidental trouble su
157. t 1 Abnormality of indoor units Indoor unit 2 Communication error of M NET system Inspection unit Outdoor unit Contents to be inspected When power is turned on 63H connector yellow is open Indoor outdoor communication error Signal receiving error Outdoor unit Indoor outdoor communication error Transmitting error Outdoor unit Miswiring of indoor outdoor unit connecting wire excessive number of indoor units 4 units or more Miswiring of indoor outdoor unit connecting wire converse wiring or disconnection Startup time over Communication error except for outdoor unit OCH512 63 SW2 setting Display detail The black square m indicates a switch position Explanation for display Pipe temperature Liquid TH3 40 194 40 194 40 90C When the coil thermistor detects 0 F or below and temperature are displayed by turns Example When 10 F 0 5 secs 0 5secs 10 gt 2 secs Shell temperature TH32 37 327 37 327 3 164C When the discharge thermistor detects 100 F or more hundreds digit tens digit and ones digit are displayed by turns Example When 105 F 0 5 secs 0 5secs 1 gt 05 gt t J 2 secs Output step of outdoor FAN 0 10 The number of ON OFF tim
158. t and then remove the right side panel 8 Remove 3 separator fixing screws 4 x 10 and remove the separator 9 Recover refrigerant 10 Remove the 3 points of the motor for compressor fixing nut using spanner or adjustable wrench 11 Remove the welded pipe of motor for compressor inlet and outlet and then remove the compressor Note Recover refrigerant without spreading it in the air Photo 10 Valve bed Valve bed fixing screws Accumulator Separator ENE NENENG E Bali Compressor MC Separator fixing screw Compressor fixing nut 13 Removing the accumulator 1 Remove the service panel See Figure 1 2 Remove the top panel See Figure 1 3 Remove 2 front cover panel fixing screws 5 x 12 and remove the front cover panel See Photo 3 4 Remove 2 back cover panel fixing screws 5 x 12 and remove the back cover panel 5 Remove the electrical parts box See Photo 3 6 Remove 3 valve bed fixing screws 4 x 10 4 ball valve and stop valve fixing screws 5 x 16 then remove the valve bed 7 Remove 3 right side panel fixing screw 5 x 12 in the rear of the unit and then remove the right side panel 8 Recover refrigerant 9 Remove 2 welded pipes of accumulator inlet and outlet 10 Remove 2 accumulator leg fixing screws 4 x 10 Note Recover refrigerant without spreading it in the air Photo 11 Accumulator Accumulator Compressor MC Accumul
159. t the pipes Tools can be used for other refrigerants O Welder and nitrogen gas cylinder Weld the pipes Tools can be used for other refrigerants O Refrigerant charging scale Refrigerant charge Tools can be used for other refrigerants O Vacuum gauge or thermis Check the degree of vacuum Vacuum Tools can be used for other Q tor vacuum gauge and valve prevents back flow of oil and refri refrigerants vacuum valve gerant to thermistor vacuum gauge Charging cylinder Refrigerant charge Tool exclusive for R410A x Prepare a new tool Use the new tool as the tool exclusive for R410A A Tools for other refrigerants can be used under certain conditions Tools for other refrigerants can be used OCH512 5 3 FEATURES PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS x we a a YA Ooo End CHARGELESS SYSTEM PRE CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT Max 100ft 30m The refrigerant circuit with LEV Linear Expansion Valve and accumulator always control the optimal refrigerant level regardless of the length 100ft 30m max and 16ft 5m min of piping The additional refrigerant charging work during installation often causes problems It is completely eliminated by chargeless system This unique system improves the
160. ted by outdoor unit 3 blinking Remote controller signal receiving Check if connecting wire of indoor unit or remote controller error is detected by remote controller is connected correctly Remote controller transmitting error Check if noise entered into transmission wire of remote is detected by remote controller controller Re check error by turning off power and on again Remote controller signal receiving error is detected by indoor unit Remote controller transmitting error is detected by indoor unit 4 blinking Error code is not defined Check if remote controller is MA remote controller PAR 21MAA Check if noise entered into transmission wire of remote controller Check if noise entered into indoor outdoor connecting wire Re check error by turning off power and on again 5 blinking Serial communication error Check if connector CN4 on outdoor controller board and lt Communication between outdoor I controller board and outdoor power outdoor power board is not disconnected board gt Check if there is poor connection of connector on outdoor Samun aton between gutdoor z controller board CNMNT and CNVMNT Communication error of M NET Check M NET communication signal system K1 Error code displayed on remote controller 2 Refer to service manual for indoor unit OCH512 61 Indication Outdoor controller board LED1 Green LED2 Red C
161. the transmission wire of remote controller Check disconnection or looseness of indoor unit or transmission wire of remote controller Set one of the remote controllers main If there is no problem with the action above Check wiring of remote controller Total wiring length max 500m 1640ft Do not use cable x 3 or more The number of connecting indoor units max 16 units The number of connecting remote control ler max 2 units When the above mentioned problem of O are not applied Diagnose remote controllers a When RC OK is displayed remote controllers have no problem Turn the power off and on again to check If abnormality generates again replace indoor controller board b When RC NG is displayed replace remote controller c When RC E3 or ERC 00 66 is dis played noise may be causing abnormality If the unit is not normal after replacing indoor controller board in group control indoor con troller board of address 0 may be abnormal Remote controller control board Abnormal if data cannot be normally read from the nonvolatile memory of the remote controller control board Error code E1 Abnormal if the clock function of remote controller cannot be normally operated Error code E2 Defective remote controller Replace remote controller Remote controller transmission error E3 signal receiving error E5 Abnormal if remote
162. to be taken for service Summary Judge what is wrong and take a corrective action according Displayed to 10 4 Self diagnosis action table The trouble is reoccurring Conduct trouble shooting and ascertain the cause of the Mol displayed trouble according to 10 5 Troubleshooting of problems Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor poor connection of wiring noise and etc Re check the symptom and check the installation environment refrigerant amount weather when the trouble occurred matters related to wiring and etc Reset error code logs and restart the unit after finishing service There is no abnormality concerning of parts such as electrical component controller board remote controller and etc The trouble is not reoccurring DRe check the abnormal symptom Conduct trouble shooting and ascertain the cause of the trouble according to 10 5 Troubleshooting of problems Continue to operate unit for the time being if the cause is not ascertained There is no abnormality concerning of parts such as electrical component controller board remote controller and etc Not logged 10 2 CHECK POINT UNDER TEST RUN 1 Before test run lt After installation of indoor and outdoor units piping work and electric wiring work re check that there is no refrigerant leak age loosened connections and in
163. tween outdoor controller board and M NET board Serial communication error 2 Check the following items and cautions for emergency operation O Make sure that there is no abnormality in outdoor unit other than the above abnormalities Emergency operation will not be available when error codes other than the above are indicated For emergency operation it is necessary to set the emergency operation switch SWE on indoor controller board Refer to the electrical wiring diagram of indoor unit for how to set the indoor unit During emergency operation the air conditioner will continuously be operated by supplying power and stopping it It can not be turned on or off by remote control and temperature control is not possible Do not perform emergency heating operation for an extended period of time If the outdoor unit starts defrosting during this period cold air will blow out from the indoor unit Do not perform emergency cooling operation for more than 10 hours Neglecting this could result in freezing the heat exchanger in indoor unit 3 Emergency operation procedure Turn the main power supply off Turn on the emergency operation switch SWE on indoor controller board Set the shorting pins of emergency operation connector CN31 on outdoor controller board to ON Use SW4 2 on outdoor controller board to set the operation mode cooling or heating SW4 1 is not used SW4 CN31 ON Heating ON B O Shorting
164. uity by tester Replace the parts if the parts are defective Replace outdoor controller circuit board 27 Error Code Abnormal point and detection method Case Judgment and action Indoor outdoor unit connector miswiring excessive number of units 1 Outdoor controller circuit board can automatically check the number of connected indoor units Abnormal if the number cannot be checked automatically due to miswiring of indoor outdoor unit connecting wire and etc after power is turned on for 4 minutes Abnormal if outdoor controller circuit board recognizes excessive number of indoor units Contact failure or miswiring of indoor outdoor unit connecting wire Diameter or length of indoor outdoor unit connecting wire is out of specified capacity 4 or more indoor units are connected to 1 outdoor unit Defective transmitting receiving circuit of outdoor controller circuit board Defective transmitting receiving circuit of indoor controller board Defective indoor power board 2 or more outdoor units have refrigerant address 0 In case of group control Noise has entered into power supply or indoor outdoor unit connecting wire Miswiring of indoor outdoor unit connecting wire converse wiring or disconnection Outdoor controller circuit board can automatically set the unit number of indoor units Abnormal if the indoor unit number cannot be set within 4 minutes a
165. um pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc Use the following tools specifically designed for use with R410A refrigerant Make sure that the inside and outside of refrige rant piping is clean and it has no contaminants such as sulfur oxides dirt shaving particles etc which are hazard to refrigerant cycle In addition use pipes with specified thickness The following tools are necessary to use R410A refrigerant Tools for R410A Flare tool Size adjustment gauge Vacuum pump adaptor Electronic refrigerant charging scale Gauge manifold Charge hose Gas leak detector Torque wrench Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc Handle tools with care Store the piping to be used indoors during installation and both ends of the piping sealed until just before brazing Leave elbow joints etc in their packaging If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor Do not use a charging cylinder If a charging cylinder is used the composition of refrigera nt will change and the efficiency will be lowered The refr
166. ure switch cover it with a wet cloth to prevent it from heating 210 F or more then braze the pipes so that the inside of pipes are not oxidized Photo 8 High pressure switch 63H 11 Removing the reactor DCL and capacitor CE 1 Remove the service panel See Figure 1 2 Remove the top panel See Figure 1 3 Remove the electrical parts box See Photo 3 lt Removing the reactor gt 4 Remove 4 reactor fixing screws 4 x 10 and remove the reactor lt Removing the capacitor gt 4 Remove 2 capacitor band fixing screws 4 x 10 and remove the capacitor x The reactor and capacitor is attached to the rear of the electri cal parts box Photo 9 Reactor fixing screws Reactor DCL Capacitor CE Electrical parts box Reactor fixing screws Capacitor band fixing screws OCH512 96 OPERATING PROCEDURE PHOTOS 12 Removing the compressor MC 1 Remove the service panel See Figure 1 2 Remove the top panel See Figure 1 3 Remove 2 front cover panel fixing screws 5 x 12 and remove the front cover panel See Photo 3 4 Remove 2 back cover panel fixing screws 5 x 12 and remove the back cover panel 5 Remove the electrical parts box See Photo 3 6 Remove 3 valve bed fixing screws 4 x 10 4 ball valve and stop valve fixing screws 5 x 16 then remove the valve bed 7 Remove 3 right side panel fixing screw 5 x 12 in the rear of the uni
167. utdoor controller circuit board e Replace the outdoor controller circuit board e Replace the indoor controller board of the indoor unit which does not operate e Not abnormal There may be the influence of electromagnetic noise Check the transmission wire and get rid of the causes e Replace the outdoor power circuit board e Replace the indoor power board Symptoms Nothing is displayed on the remote controller Diagnosis flow LED display of the indoor controller board LED1 LED2 or e LED3 Inspection method and troubleshooting Check the voltage of the terminal block TB6 of the remote controller DC 10V to DC 16V HES NO Check the status Lighting of the LED2 Blinking Check the status of the LED2 after disconnecting the remote controller wire from the terminal block TB5 of the indoor unit Check the status Lighting of the LED2 Blinking OCH512 Defective remote controller e Breaking or poor contact of the remote controller wire lt The remote controller wire short circuits Defective indoor controller board e Replace the remote controller e Check if there is breaking or poor contact of the remote controller wire Check the voltage of the terminal block TB5 connecting the remote controller wire If it is not between DC 10V and DC16V the indoor controller board must be d
168. ws T Fan grille Grille fixing screws Service panel fixing screws ul i OO 2 Removing the fan motor MF1 MF2 Photo 1 Front panel Photo 2 1 Remove the service panel See Figure 1 2 Remove the top panel See Figure 1 3 Remove 5 fan grille fixing screws 5 x 12 to detach the fan grille See Figure 1 4 Remove a nut for right handed screw of M6 to detach the propeller See Photo 1 5 Disconnect the connectors CNF1 CNF2 on controller circuit board in electrical parts box 6 Remove 4 fan motor fixing screws 5 x 20 to detach the fan motor See Photo 2 Propeller Fan motor fixing screws Fan Fan motor fixing screws 3 Removing the electrical parts box Photo 3 1 Remove the service panel See Figure 1 Controller circuit 2 Remove the top panel See Figure 1 5271 board C B 3 Disconnect the indoor outdoor connecting wire from 4 Electrical terminal block parts box 4 Remove all the following connectors from controller circuit board fan motor linear expansion valve thermistor lt Outdoor pipe gt thermistor lt Shell gt thermistor lt Outdoor 2 phase pipe gt thermistor lt Outdoor gt high pressure switch 4 way valve coil Pull out the disconnected wire from the electrical parts Electrical parts box fixing screw Terminal block TB1 box lt Diagram symbol in the connector
169. xpelled from the outdoor unt Cooling when pipes or piping joints are cooled they get sweated and water drips down Heating water drips down from the heat exchanger Use optional parts Drain Socket and Drain pan if these water needs to be collected and drained out for once The display of IR wireless remote controller gets dim or does not come on The indoor unit does not receive a signal from remote controller at a long distance OCH512 Batteries are being exhausted Replace them and press the reset button of remote controller 46 10 6 HOW TO CHECK THE PARTS PUZ A42NHA5 PUZ A42NHA5 BS PUY A42NHA5 PUY A42NHA5 BS Parts name Check points Thermistor TH3 Disconnect the connector then measure the resistance with a tester lt Outdoor pipe gt At the ambient temperature 10 C 30C 50 F 86 F Thermistor TH6 lt Outdoor 2 phase pipe gt Normal Abnormal Thermistor TH7 TUS 160kQ 410kQ lt Outdoor gt TH3 Thermistor TH8 TH6 4 3kQ 9 6kQ Open or short lt Heatsink gt TH7 Thermistor TH32 lt Shell gt TH8 39kQ 105kQ Fan motor MF1 MF2 Refer to next page Solenoid valve coil Measure the resistance between the terminals with a tester lt Four way valve gt At the ambient temperature 20 C 68 F 2154 Normal Abnormal A42 2350 1709 Open or short Motor for compressor Measure the resistance between the term
170. y 230V voltage 208V Frost prevention 2 36 F Normal temperature 3C 37 F Humidifier control When the compressor operates the humidifier also operates When the fan operates the humidifier also operates Change of Standard defrosting control _ For high humidit De kandh ENEN o D kandh ID sp kan Meaning of Function setting Mode02 indoor temperature detecting Indoor temperature ta REMOTE MAN Average data of the sensor on all the indoor units Data of the sensor on the indoor unit that connected with remote controller Data of the sensor on main remote controller OCH512 75 2 Functions available when setting the unit number to 01 03 or AL 07 in case of IR wireless remote controller lt When setting functions for an indoor unit in an independent system set the unit number to 01 referring to setting the indoor unit number e When setting functions for a simultaneous twin indoor unit system set the unit number to 01 to 03 for each indoor unit in case of selecting different functions for each unit referring to setting the indoor unit number e When setting the same functions for an entire simultaneous Twin indoor unit system set refrigerant address to AL 07 in case of IR wireless remote controller referring to setting the indoor unit number Initial setting Factory setting Mode No Not available Function

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