Home

Service Manual - GoDuctless.com

1. Indoor outdoor unit communication Defective transmitting receiving O Turn the power off and on again to check error Transmitting error circuit of indoor controller board If abnormality generates again replace Abnormal if 1 receiving is detected 30 Noise has entered into power indoor controller board times continuously though indoor controller supply board has transmitted O Noise has entered into outdoor control wire Indoor controller board D Defective indoor controller Replace indoor controller board Abnormal if data cannot be read normally board from the nonvolatile memory of the indoor controller board Remote controller control board Defective remote controller O Replace remote controller Abnormal if data cannot be read normal ly from the nonvolatile memory of the E1 remote controller control board Error code E1 or E2 Abnormal if the clock function of remote controller cannot be operated normally Error code E2 Water leakage Mis piping of extension pipes OCheck the extension pipes for mis piping This detection is performed during the When connected with multiple operation stop heating fan or error stop units mode etc other than cooling and dry When a and b are found water leakage Mis wiring of indoor outdoor Check the Indoor outdoor unit connecting occurs unit connecting wire When wire for mis wiring a Pipe lt liquid gt temperature inlet tem connected with mu
2. Indoor outdoor unit communication D Contact failure short circuit or Check LED display on the outdoor control cir error Signal receiving error mis wiring converse wiring of cuit board Connect A control service tool D Abnormal if indoor controller board indoor outdoor unit connecting PAC SK52ST cannot receive any signal normally for wire Refer to EA EC item if LED displays EA EC six minutes after turning the power on D Check disconnection or looseness of indoor Abnormal if indoor controller board Defective transmitting receiving outdoor unit connecting wire of indoor unit or cannot receive any signal normally for circuit of indoor controller board outdoor unit three minutes Defective transmitting receiving Check all the units in case of twin triple E6 Consider the unit as abnormal under the circuit of indoor controller board indoor unit system following condition When two or more Noise has entered into indoor Turn the power off and on again to check indoor units are connected to an outdoor unit connecting wire If abnormality generates again replace outdoor unit indoor controller board indoor controller board or outdoor cannot receive a signal for three minutes controller circuit board from outdoor controller circuit board a Other indoor controller board may have signal which allows outdoor controller defect in case of twin triple indoor unit circuit board to transmit signals system
3. 2 Removing the fan casing bottom half 1 Squeeze the tabs on the fan casing to remove it in the direction of arrow 2 3 Removing the motor cable 1 Remove the motor cable threw the rubber bush 4 Removing the fan motor and the Sirocco fan 1 Remove the two motor fixing screws to remove the motor and the Sirocco fan in the direction of arrow 3 2 Remove the four fan case fixing screws to take the top half of the fan casing off Exercise caution when removing heavy parts C Hg PI Y a PE HH p Fig 9 ee Exercise caution when removing heavy parts 6 Bearing PEA A18AA4 model only 1 Removing the bearing 1 Remove the two fixing screws on the bearing cover K to remove it Fig 13 2 Remove the two bearing retainer screws to remove the bearing Fig 14 7 Heat exchanger 1 Remove the drain pan according to the proce dure in section 3 2 Remove the heat exchanger cover according to the procedure in section 4 2 3 Removing the cover 1 Remove the two fixing screws on the cover L to remove it Fig 15 4 Removing the Heat exchanger 1 Remove the fixing screws on the heat exchanger M to remove it Fig 16 29 Mir SLIM a MITSUBISHI ELECTRIC CORPORATION id os ublication effe as _ Specificatio pue ect to Pd ange HWE0807B Firs edition publishe in pn Hess
4. After LED 1 2 are lighted LED 2 is turned e For about 2 minutes after power on operation of the For about 2 minutes PLEASE WAIT off then only LED 1 is lighted Correct remote controller is not possible due to system start up following power on operation Correct operation e Connector for the outdoor unit s protection device is not connected VEERDENUA tS Atter sibeut amin Only LED 1 is lighted gt LED 1 2 blink Reverse or open phase wiring for the outdoor unit s power terminal block L1 L2 L3 DES 3 utes has expired isplay messages do not appear por 9 APP following power on Incorrect wiring between indoor and outdoor units even when operation switch is Only LED 1 is lighted LED 1 2 blinks incorrect polarity of S1 S2 S3 s sueta ag ain ease twice LED 2 blinks once e Remote controller wire short not light up On the IR wireless remote controller with conditions above following phenomena takes place e No signals from the remote controller are accepted e OPE lamp is blinking The buzzer makes a short ping sound Note Operation is not possible for about 30 seconds after cancellation of function selection Correct operation 15 For description of each LED LED1 2 3 provided on the indoor controller refer to the following table LED 1 power for microcomputer Indicates whether control power is supplied Make sure that this LED is always lit LED 2 power for remote controll
5. Airflow rate m min CFM PEA A18AA4 External static pressure 0 060 in WG 15Pa 208 230V 60Hz 47 I 30 20 N External static pressure in WG Pa 9 10 11 12 13 14 15 16 17 18 19 318 353 388 424 459 494 530 565 600 636 671 Airflow rate m min CFM PEA A18AA4 External static pressure 0 200 in WG 50Pa 208 230V 60Hz 80 0 32 70 60 v Hoye HESS 50 0 20 REET Sal Low External static pressure in WG Pa 9 10 11 12 13 14 15 16 17 18 19 318 353 388 424 459 494 530 565 600 636 671 Airflow rate m min CFM 3 OUTLINES AND DIMENSIONS PEA A12AA4 Unit mm in PEA A18AA4 Drain 0 032 1 1 4 Emergency draining 37 1 15 32 100 3 15 16 Suspension bolt hole 20 13 16 157 5 6 7 32 4 14X30 9 16X1 3 16 Slot 12 1 2 J 37 1 15 32 2XE 02 9 1 8 ar L 02 9 1 8 lt 2 lt Air z inlet Eee PSS T 1 m 10 13 32 49 625 Suspension bolt pitch N 1 15 16 24 5 8 159 6 9 32 88 3 15 32 NM lt KX X 40 92949194929 d lt lt lt X 22 Air outlet D Duct YVR 00406 OSS LLR 5 KKK B Suspension bolt pitch 5 59 88 3 15 32 T 9 25 2s 5 SOS QQ 2 KOS ESS writer 20 13 16 N imd N 2
6. Preparations in the field Maximum cable length is 10 m 32ft 12 Oo For relay X use the specifications given below Operation coil Rated voltage 12VDC Power consumption 0 9W or less Use the diode that is recommended by the relay manufacturer at both ends of the relay coil The length of the electrical wiring for the PAC YU25HT is 2 meters 6 1 2 ft To extend this length use sheathed 2 core cable Control cable type CVV CVS CPEV or equivalent Cable size 0 5 mm 1 25 mm 16 to 22 AWG Don t extend the cable more than 10 meters 32ft Recommended circuit R Q 1 phase s se Uu power supply 88H FS2 208V 230V 60Hz R D Fst Wiring diagram S 0 NK al FS1 2 Thermal fuse 88H FS2 H1 H2 Heater ud 26H Overheat m protection thermostat Control board D D 88H Electromagnetic contactor CN24 4 Wiring restrictions Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters 32ft Longer than 10 meters 32ft could cause improper operation Use a transit relay when extending wiring such as remote wiring 13 7 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the followings Check the power supply voltage 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care the followings during servicing D Before servicing the air conditione
7. 1 1 Pull out the thermistor holder B and thermis tor C on the control box Fig 3 25 Ooo O Exercise caution when removing heavy parts 3 Drainpan 1 Removing the filter and the bottom plate 1 Push up the tab on the filter and pull out the filter in the direction of the arrow 1 2 Remove the fixing screws on the bottom plate D E to remove it 2 Removing the drainpan 1 Pull out the drain pan in the direction of the arrow 1 Note e Drain the water out of the drain pan before removing it e To avoid dew condensation use insulated screws in the places marked with circles in Figure 6 Insulation material Fig 6 26 ee Exercise caution when removing heavy parts 4 Thermistor Condenser evaporator Liquid pipe 1 Remove the drain pan according to the proce dure in section 3 2 Removing the Heat exchanger cover 1 Remove the four fixing screws on the heat exchanger cover F to remove it Fig 7 3 Removing the thermistor 1 Remove the thermistor G from the thermistor holder on the copper tube A Thermistor size Liquid pipe e3 8inch o8mm Condenser evaporator 2 1 4 Fig 8 27 O 5 Fan and fan motor 1 Removing the filter and the bottom plate 1 Push down the tab on the filter and pull out the filter in the direction of the arrow 1 2 Remove the fixing screws on the bottom plate J to remove it
8. FREQUENCIES Hz ede a hd Md fle cou or AMEE S WAC e o o r cO LO E 125 250 ERESHOLD OF 63 APPROXIMAT T HEARING FOR CONTINUOUS NOISE e N 90 10 eqr Z000 0 gp gp 13A31 SYNSS3Yd ANNOS 3AVIOO MUTET MOARA NASAAN AA el eer de eel boot delle 1000 2000 4000 8000 500 IM oot smi dh d lc e e e ee iz E ERESHOLD OF HEARING FOR CONTINUOUS 63 APPROXIMAT T NOISE it e eo N 90 10 o o o r LO eqr Z000 0 gp gp 13A31 3un SS3Hd ANNOS 3AVIOO BAND CENTER FREQUENCIES Hz NOTE The sound level is measured in an anechoic room where echoes are few when compressor stops The sound may be bigger than displayed level under actual installation condition by surrounding echoes The sound level can be higher by about 2 dB than the displayed level during cooling and heating operation TUNES 60Hz D Ea 5 lt cr lt 2 FE oS c lt s lt co LLI x O atc 2 o D T tlg Q foe 550 2 5 Sc o q oa eee we oe e WIWEREPREEPREFEPZZ NI eel bed dell ell fe ye 1000 2000 4000 8000 500 ehe a MUA cole MM i o o o o r LO N 250 ine E APPROXIMAT TERESHOLD OF HEARING FOR CONTINUOUS NOISE 63 90 0 eqr 200070 gp gp 13A31 SYNSS3Yd
9. be higher by about 2 dB than the displayed level during cooling and heating operation INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW PEA A12AA4 External static pressure 0 020 in WG 5Pa 208 230V 60Hz External static pressure in WG Pa 6 7 8 9 10 11 212 247 282 318 353 388 Airflow rate m min CFM PEA A12AA4 External static pressure 0 140 in WG 35Pa 208 230V 60Hz External static pressure in WG Pa 11 6 7 8 9 10 212 247 282 318 353 388 Airflow rate m min CFM 12 424 PEA A12AA4 External static pressure 0 060 in WG 15Pa 208 230V 60Hz External static pressure in WG Pa 6 7 8 9 10 11 12 212 247 282 318 353 388 424 Airflow rate m min CFM PEA A12AA4 External static pressure 0 200 in WG 50Pa 208 230V 60Hz External static pressure in WG Pa 6 7 10 12 212 247 282 91 8 353 388 424 Airflow rate m min CFM PEA A18AA4 External static pressure 0 020 in WG 5Pa 208 230V 60Hz External static pressure in WG Pa 9 10 11 12 13 14 15 16 17 18 19 318 853 888 424 459 494 530 565 600 636 671 Airflow rate m min CFM PEA A18AA4 External static pressure 0 140 in WG 35Pa 208 230V 60Hz 80 0 32 70 0 28 E bs 0 50 P HERE 5 pA 40 o 918 Middle s Rated mE 2 30 PAL 20 5S 10 318 353 388 424 14891 14941 530 565 660 636 71
10. error E3 signal receiving error E5 D Two remote controller are set D Set a remote controller to main and the Abnormal if remote controller could not as main other to sub find blank of transmission path for six In case of 2 remote con seconds and could not transmit Error code E3 trolara I Remote controller receives transmitted Remote controller is connected Remote controller is connected with only one data at the same time compares the with two indoor units or more indoor unit data and when detecting it judges Repetition of refrigerant The address changes to a separate setting different data to be abnormal 30 address continuous times Error code E3 Defective transmitting receiving Diagnose remote controller TT circuit of remote controller a When RC OK is displayed remote con Abnormal if indoor controller board could M not find blank of transmission path Defective transmitting receiving trollers have no problem E3 Error code E5 circuit of indoor controller a du power on to Sade Or Indoor controller board receives trans board in bal E cea usu Pepe E5 mitted data at the same time compares Noise has entered into trans b When RC NG is displayed replace the data and when detecting it judges mission wire of remote con remote controller different data to be abnormal 30 troller dani PW continuous times Error code E5 S E cai tie 19
11. the condition above is detected during suspensive abnormality Constantly detected during drain pump operation Malfunction of drain pump 2 Defective drain Clogged drain pump Clogged drain pipe Defective drain float switch Catch of drain float switch or malfunction of moving parts cause drain float switch to be detected under water Switch On Defective indoor controller board 17 0 9 Check resistance value of thermistor 0 C 92 F 15 0kQ 10 C 50 F 9 6kQ 20C 68 F 6 3kQ 30 C 86 F 4 3kO 40 C 104 F 3 0kO If you put force on draw or bend the lead wire with measuring resistance value of thermistor breaking of wire or contact failure can be detected 2 Check contact failure of connector CN20 on the indoor controller board Refer to 7 5 Turn the power on again and check restart after inserting connector again Check room temperature display on remote controller Replace indoor controller board if there is abnormal difference with actual room temperature Turn the power off and on again to operate after check 0 9 Check resistance value of thermistor For characteristics refer to P1 above 2 Check contact failure of connector CN44 on the indoor controller board Refer to 7 5 Turn the power on again and check restart after inserting connector again Check pipe liquid temperature with remote controller in test run mode If pipe lt liquid gt te
12. 0 13 16 90 3 9 16 a q 1 e LO 23 29 32 Drain pipe O D o32 1 1 4 Knockout hole 27 1 3 32 Indoor outdoor connecting line Knockout hole 27 1 3 32 Remote controller transmission line 700 27 9 16 677 26 21 32 Control box 23 29 32 10 13 32 23 29 32 102 4 1 32 170 6 23 32 200 7 7 8 7 I p i nu fo a J Mae s L Terminal block Indoor outdoor connecting line Terminal block Remote controller transmission line Drain 0 032 1 1 4 Spontaneous draining 150 Duct 5 29 32 100 250 3 15 16 2 2 02 9 1 8 D Refrigerant piping Refrigerant piping flare connection gas flare connection liquid Less than 300 A oD 175 5 6 29 32 7 32 2 T S Actual length oS Access door Dx els e Ceiling surface Access door o c9 a C amp e S Make the access door at the appointed position properly for service maintenance Drain hose 1 D 032 1 1 4 accessory mm in N_ Gas pipe _ Liquid pipe PEA A12AA4 20 52 39 35 7 16 87 12 zd 9 9e12 7 1 2 26 35 1 4 10 0 12 PEA A18AA4 cen 4552 ure I U 12552 1699 Note1 Use M10 screw for the suspension bolt field supply 2 Keep the service space for the maintenance at the bottom 3 This chart indicates for PEA
13. A12AA4 model which has 2 fans PEA A18AA4 models have 4 fans 4 In case an inlet duct is used remove the air filter supply with the unit then install the filter field supply at suction side 4 WIRING DIAGRAM PEA A12AA4 PEA A18AA4 INSIDE SECTION OF CONTROL BOX Sar eu CN24 CN32 YELLOW CN51 CN41 DC294 340V RED RECTIFY CIRCUIT 2 ON OFE CN22 BLUE m SWE GLED3 LED2 WHITE RED WHITE WHITE RED LED1 WHITE CN90 CN105 CN4F CN44 CN20 CN30 GREEN CNMF MI TO OUTDOOR UNIT TN no e D DRAINPUMP __ LED x IE ull FS TH2 TH5 TH1 2x zb cic zd l FAN MOTOR RB _ Sw sia WB __ PARTS LOCATION SYMBOL EXPLANATION SYMBOL NAME SYMBOL NAME SYMBOL NAME INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD FUSE FUSE AC250V 6 34 SWITCH FOR MODE SELECTION IR WIRELESS REMOTE CONTROLLER BOARD AUX RELAY SWITCH FOR CAPACITY CODE RECEIVING UNIT CONNECTOR LOSSNAY SWITCH FOR MODEL SELECTION BUZZER CONNECTOR EMERGENCY OPERATION INTAKE AIR TEMP THERMISTOR TH2 FLOAT SWITCH TERMINAL BLOCK TB6 REMOTE CONTROLLER TRANSMISSION LINE CN90 CONNECTOR WIRELESS TBA TERMINAL BLOCK CN105 CONNECTOR RADIO FREQUENCY INTERFACE INDOOR OUTDOOR CONNECTING LINE CN105 LED1 POWER SUPPLY B BE TERMINAL BLOCK POWER SUPPLY I B REMOTE CONTROLLER TRANSMISSION LINE LED3 TRANSMISSION INDOOR OUTDOOR RADIO FREQU
14. ANNOS SAVLOO fede fea eel were ede 1000 2000 4000 8000 500 eel ho et d 250 P E HEARING FOR 63 APPROXIMAT ES OF NOISE 90 0 o o o o o r cO LO N eqr Z000 0 gp gp 13A31 SYNSS3Yd ANNOS SAVLOO BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz TNE lt 60Hz gt D N T 55 Q 122 39 oS dc Tee lt 00 x N ate D gt 2 on 9 c o st T ui c PEA A18AA4 eee nfo feel e ee reefer ee ee yf fed eel ol dd ye 1000 2000 4000 8000 500 BAND CENTER FREQUENCIES Hz A gt lt NV g 125 250 63 lt SS S NSN NSN ES FOR CONTINUOUS NOISE 90 0 o o o o r LO N eqr 000 0 gp gp 13A31 SYNSS3Yd ANNOS 3AVIOO PPI nln A el weer eee AL NI el by fed deel 2000 4000 8000 BAND CENTER FREQUENCIES Hz 1000 500 bi fof i 250 ee SEP SSS NSS NSS ES aN HEARING FOR 63 NOISE APPROXIMAT ES OF eqr Z000 0 gp gp 13A31 SYNSS3Yd ANNOS GNVd 3AVIOO NOTE The sound level is measured in an anechoic room where echoes are few when compressor stops The sound may be bigger than displayed level under actual installation condition by surrounding echoes The sound level can
15. Changes for the Better MITSUBISHI ES ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS December 2010 No HWE0807B TECHNICAL amp SERVICE MANUAL Series PEA Ceiling Concealed R410A Indoor unit Model names PEA A12AA4 PEA A18AA4 CONTENTS 1 PART NAMES AND FUNCTIONS 2 2 SPECIFICATIONS 3 3 OUTLINES AND DIMENSIONS 8 A WIRING DIAGRAM 9 ETE 5 REFRIGERANT SYSTEM DIAGRAM 10 6 HEATER CONTROL 11 7 TROUBLESHOOTING 14 INDOOR UNIT 8 DISASSEMBLY PROCEDURE 25 fiir SLIM 1 PART NAMES AND FUNCTIONS Indoor Unit PEA A12AA4 PEA A18AA4 Air outlet Air outlet duct flange Air inlet 2 SPECIFICATIONS Model Name PEA A12AA4 PEA A18AA4 Heating Heating 18000 19000 208 230V 60Hz 208 230V 60Hz Cooling 12000 Capacity gt Power source Power input Current 0 63 Temperature set range Remote controller 67 to 86 19 to 30 63 to 83 17 to 28 Airflow direction Fan Type x Quantit Sirocco fan 2 External static press in WG Pa 0 02 0 06 0 14 0 20 5 15 35 50 0 02 0 06 0 14 0 20 5 15 35 50 0 07 0 57 67 to 86 19 to 30 0 07 o C T gt 2 00 3 4 20 5 15 35 50 Motor type DC brushless motor 0 096 Direct driven mamin 7090 110 CFM 247 317 388 L S 116 150 183 Ex
16. ENCY INTERFACE FOR RF THERMOSTAT Note1 Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing 2 Indoor and outdoor connecting wires are made with polarities make wiring matchingterminal numbers 51 52 53 3 Symbols used in wiring diagram above are as follows CONNECTOR TT TERMINAL HEAVY DOTTED LINE FIELD WIRING THIN DOTTED LINE OPTIONAL PARTS 4 Use copper supply wire 5 REFRIGERANT SYSTEM DIAGRAM PEA A12AA4 PEA A18AA4 Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection Condenser evaporator temperature thermistor TH5 L o Flare A Pipe temperature Room temperature thermistor liquid thermistor TH1 TH2 Strai TP rainer Distributor 450 10 6 HEATER CONTROL 6 1 Control specifications and Function setting Table 1 shows how the field installed heater is controlled Select the desired pattern in the table below and set the Function on the indoor units as shown in Table 1 Table 1 Function table Select unit numbers 01 to or all units AL wired remote controller O7 IR wireless remote controller wm Om core Seti Heater control Heater OFF Inlet air temp gt set temp Heater ON Inlet air temp lt set temp 4 5 F 2 5 C The fan will stop and the hea
17. WG 15Pa external static pressure 3 Cooling capacity value at 1 1system Heating capacity value at 1 1system Power outlet Standard attachment Protection devices Fuse 250V 6 3A Fuse 250V 6 3A Remark SOUND CRITERION CURVES TUNES 60Hz De On 4 5 SER _ 2 lt lt 9 amp 5 Q 2 o D T F A Q 122 SEE _ oS Cc 4 5 lt oq e atc een een tele ee I eee ele edel 1000 2000 4000 8000 500 BAND CENTER FREQUENCIES Hz ede oN hE A MILF PS r LO E gt 125 ERESHOLD OF 63 APPROXIMAT T HEARING FOR CONTINUOUS NOISE kus N 90 10 eqr Z000 0 gp 13A31 SYNSS3Yd ANNOS SAVLOO me i e eel oe eee we fof ne nf N et edt 1000 2000 4000 8000 500 BAND CENTER FREQUENCIES Hz eel lp a a Al co mah hh G rr dd PPS WAZ MA E 125 250 ERESHOLD OF 63 APPROXIMAT T HEARING FOR CONTINUOUS NOISE um N 90 10 o o r LO eqr Z000 0 gp gp 13A31 3un SS3Hd ANNOS 3AVIOO UNES 60Hz T 2 QW 55 foo SER _ oS r ES lt s uid e 2 Q T 4 8 5 55 _ oS c tis lt o x T ul c eel ele H eel wee ell elie e UL PA 1000 2000 4000 8000 500 BAND CENTER
18. arted Abnormal if it stays under 15 C 5 F for three minutes again within 16 minutes after six minute resume prevention mode 2 Overheating protection Heating mode The units is in six minute resume prevention mode if pipe Liquid or con denser evaporator temperature is detected as over 70 C 158 F after the compressor started Abnormal if the temperature of over 70 158 is detected again within 10 minutes after six minute resume prevention mode Pipe temperature Cooling mode Detected as abnormal when the pipe tem perature is not in the cooling range 3 min utes after compressor start and 6 minutes after the liquid or condenser evaporator pipe is out of cooling range Note 1 It takes at least 9 minutes to detect Note 2 Abnormality P8 is not detected in drying mode Cooling range 3 deg C 5 4deg F TH TH1 TH Lower temperature between liquid pipe temperature TH2 and con denser evaporator temperature TH5 TH1 Intake temperature Heating mode When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished the unit is detected as abnormal when condenser evaporator pipe temperature is not in heating range within 20 minutes Note 3 It takes at least 27 minutes to detect abnormality Note 4 It excludes the period of defrosting Detection restarts when defrost ing mode is over Heating range deg C 5 4deg F TH5 TH1 Cooling
19. as normally reset Constantly detected during cooling drying and heating operation Short 90 C 194 F or more Open 40 C 40 F or less Defective thermistor characteristics Contact failure of connector CN44 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Defective refrigerant circuit is causing thermistor temperature of 90 C 194 F or more or 40 C 40 F or less 5 Defective indoor controller board Pipe temperature thermistor Liquid TH2 D The unit is in three minute resume prevention mode if short open of thermistor is detected Abnormal if the unit does not reset normally after three minutes The unit returns to normal operation if it has normally reset Constantly detected during cooling drying and heating except defrosting operation Short 90 C 194 F or more Open 40 C 40 F or less Contact failure of drain float switch CN4F D Contact failure of connector D Extract when the connector of drain float Insert failure switch is disconnected and of connector CN4F is not short circuited 2 Constantly detected during operation Defective indoor controller board Drain overflow protection operation D Suspensive abnormality if drain float switch is detected to be underwater for 1 minute and 30 seconds continuously with drain pump on Turn off compressor and indoor fan 2 Drain pump is abnormal if
20. con nection 10 13 VDC Between 1 and 3 Centralized control JAMA standard HA terminal A Thermistor liquid condenser evaporator temperature Float thermistor Thermistor Inlet temperature Indoor outdoor transmission 0 24VDC Fan motor output 1 4 310 340 VDC 5 4 15 VDC 6 4 0 6 5 VDC 7 4 StopO or 15 VDC Run 7 5 VDC 0 15 pulse Drain up mechanism output 200VAC LOSSNAY For Fan control Wireless remote controller Voltage on the side of PC672 and C955 Same with the voltage between 7 and 4 of CNMF Voltage between the C955 pins 15 VDC Same with the voltage between 5 and 4 of CNMF Voltage between the C626 pins OVDC with the fan stopped 1 6 5VDC with the fan in operation Same with the voltage between 6 and 4 of CNMF ee 7 6 TROUBLE CRITERION OF MAIN PARTS PEA A12AA4 PEA A18AA4 Check method and criterion Room temperature Measure the resistance with a tester a Part temperature 10 C 50 F 30 C 86 F Pipe temperature m thermistor liquid 8kQ 20kQ Opened or short circuited TH2 Condenser evaporator temperature thermistor TH5 Wiring diagram 23 Ooo O 7 7 DC FAN MOTOR FAN MOTOR INDOOR CONTROLLER BOARD Check method of DC fan motor fan motor indoor controller circuit board Notes High voltage is applied to the connecter CNMF for the fan motor Give attention to the service Do not pull out the connec
21. er Indicates whether power is supplied to the remote controller This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant address O LED 3 communication between indoor and outdoor units Indicates state of communication between the indoor and outdoor units Make sure that this LED is always blinking AUTO RESTART FUNCTION Indoor controller board This model is equipped with the AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode set temperature and the fan speed are memorized by the indoor controller board The auto restart function sets to work the moment the power has restored after power failure then the unit will restart automatically Set the AUTO RESTART FUNCTION using the wireless remote controller Mode no 1 16 a C O Note Refer to the manual of outdoor unit for the details of display 7 3 SELF DIAGNOSIS ACTION TABLE such as F U and other E Defective thermistor characteristics Contact failure of connector CN20 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Defective indoor controller board Room temperature thermistor TH1 D The unit is in three minute resume prevention mode if short open of thermistor is detected Abnormal if the unit does not reset normally after three minutes The unit returns to normal operation if it h
22. g of refrigerant address Under grouping control system there are some units in case of grouping control system whose refrigerant address is O If there are some units whose refrigerant addresses are 0 in one group set one of the units to O using SW1 3 6 on outdoor Short cut of remote controller wires controller circuit board Defective remote controller 3 Remove remote controller wires and check LED2 on indoor controller board e When LED is blinking check the short cut of remote controller wires e When LED is lit connect remote controller wires again and if LED2 is blinking remote controller is defective if LED2 is lit connection failure of remote controller terminal block etc has returned to normal 21 O 7 5 TEST POINT DIAGRAM 7 5 1 Indoor controller board PEA A12AA4 PEA A18AA4 Fuse 6 3A 250V C626 paani 314 p PC672 C955 rex sai CN3C J LED S LED2 CN32 pow CN20 CN24 am CN22 un E CN4F ER jn ips uS SWE CN2L CN41 izu mou SW2 w ii 5 ees CN4Y ape LED3 i 5 22 CNO1 SWE SW1 SW2 Power supply voltage 208 230VAC Emergency operation Model selection Capacity setting CN105 Radio frequency interface CN32 CN24 CN22 CN51 CN41 CN44 CN4F CN20 CN3C CNMF Vsp Remote start stop adapter Heater control 12VDC For MA remote controller cable
23. hen compressor locked Abnormal high discharging temperature 49C worked insufficient refrigerant U1 Ud Abnormal high pressure 63H worked Overheating safeguard operation P F 2 Abnormal temperature of heat sink For details check the LED Outdoor unit fan protection stop display of the outdoor controller Compressor overcurrent interruption Abnormal of power module board U Abnormality of super heat due to low discharge temperature U9 UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit Current sensor error Other errors Refer to the technical manual for the outdoor unit 1 If the beeper does not sound again after the initial two 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 three times continuously beep beep beep 0 4 0 4 0 4 sec after the initial two beeps to confirm the self check start signal was received the specified refrigerant address is incorrect On IR wireless remote controller The continuous buzzer sounds from receiving section of indoor unit Blink of operation lamp On wired remote controller Check code displayed on the LCD f the unit cannot be operated properly after the above test run has been performed refer to the following table to remove the cause Symptom T Wired remote controller LED 1 2 PCB in outdoor unit
24. lectric heater with the air conditioner 1 Parts list Check that the following parts are included in the package 1 External output cable with a yellow connector 2 in total Two types of cables with different connectors are included 2 Panel heater connector 3 in total White 1 Green 2 2 types 2 Connection to the indoor unit Use the cables that fit the connectors on the indoor unit control board 1 External output cable with a yellow connector This cable is used to connect a relay circuit for an interlocked operation with either an electric or a panel heater Connect the cable to CN24 on the indoor unit control board 2 Panel heater connector with a white connector This connector is used to perform an interlocked operation with a panel heater Depending on the indoor unit control board specification connect the cable to CN4Y as appropriate Image CN4Y for FAN control b sS PAC YU25HT 2 3 Locally procured wiring A basic connection method is shown below Indoor unit Remote control board Relay circuit Adapter control board AL 7 ee 1 i I I White 2 Electric Heater power source X P Y il White 1 Electric Heater l ET or panel E i 3 S heater I applicable only when a panel R c c s l i neateriscconnected _ _
25. ltiple units perature lt 10 C 14 F for 30 minutes b When drain float switch is detected to Detection failure of the indoor Check room temperature display on remote be soaked in the water for 15 minutes unit inlet pipe lt liquid gt ther controller and indoor pipe lt liquid gt tempera or more mistor ture Refer to the countermeasure on P2 When drain float switch is detected to be NOT soaked in the water each Drain pump failure Check if drain up machine works counting of a and b is cleared amp Drainage failure When this error is detected the error Clogged drain pump Check drain function will not be reset until the main power is Clogged drain pipe PA reset 2500 Drain float switch failure Check drain float switch Refer to the coun Drain float switch is detected termeasure on P4 and P5 to be soaked in the water ON status due to the operation failure of the moving parts Contact failure of drain float switch connector Loose connector 20 le 7 4 TROUBLESHOOTING BY INFERIOR PHENOMENA Note Refer to the manual of outdoor unit for the detail of remote controller 1 LED2 on indoor controller board e When LED1 on indoor controller board is also off is off Power supply of rated voltage is not supplied to out Check the voltage of outdoor power door unit supply terminal block L N or Ls N e When AC 208 230V is not detected Check the power wiring to outdoor unit and
26. mperature is extremely low in cooling mode or high in heating mode refrigerant circuit may have defective Check pipe lt liquid gt temperature with remote controller in test run mode If there is extreme difference with actual pipe lt liquid gt temperature replace indoor controller board Turn the power off and on again to operate after check D Check contact failure of float switch connec tor Turn the power on again and check after inserting connector again Operate with connector CN4F short circuited Replace indoor controller board if abnormali ty reappears Check if drain up machine works 2 Check drain function Remove drain float switch connector CNAF and check if it is short Switch On with the moving part of float switch UP or OPEN with the moving part of float switch down Replace float switch if it is short with the moving part of float switch down Replace indoor controller board if it is short circuited between of the drain float switch connector CNAF and abnormality reappears It is not abnormal if there is no problem about the above mentioned O Turn the power off and on again to operate after check Ooo O Freezing overheating protection is working Freezing protection Cooling mode The unit is in six minute resume prevention mode if pipe lt liquid or condenser evap orator gt temperature stays under 15 C 5 F for three minutes after the compressor st
27. or temperature with room temperature display on remote controller and outdoor controller circuit board Pipe liquid or condenser evaporator temperature display is indicated by liquid or condenser setting SW2 of outdoor controller circuit evaporator thermistor board as follows Defective refrigerant circuit Conduct temperature check with outdoor Converse connection of controller circuit board after connecting extension pipe on plural units A Control Service Tool PAC SK52ST connection Converse wiring of indoor outdoor unit connecting wire on plural units connection Defective detection of indoor room temperature and pipe condenser evaporator temperature thermistor Stop valve is not opened completely G Check converse connection of extension pipe or converse wiring of indoor outdoor unit connecting wire 18 Abnormality of pipe temperature ther Defective thermistor 0 9 Check resistance value of thermistor mistor Condenser Evaporator TH5 characteristics For characteristics refer to P1 above D The unit is in three minute resume pro Contact failure of connector Check contact failure of connector CN44 tection mode if short open of thermistor CN44 on the indoor controller on the indoor controller board is detected Abnormal if the unit does board Insert failure Refer to 7 5 not get back to normal within three min Breaking of wire or contact Turn the powe
28. or drying mode Clogged filter reduced airflow 2 Short cycle of air path Low load low temperature operation beyond the tolerance range Defective indoor fan motor e Fan motor is defective e Indoor controller board is defective Cooling or drying mode Check clogging of the filter 2 Remove shields Refer to 7 7 DC Fan motor FAN MOTOR INDOOR CONTROLLER BOARD Check outdoor fan motor Check operating condition of refrigerant circuit Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit clogs Heating mode D Clogged filter reduced airflow 2 Short cycle of air path Over load high temperature operation beyond the tolerance range Defective indoor fan motor e Fan motor is defective Indoor controller board is defective Heating mode D Check clogs of the filter Remove shields Refer to 7 7 DC Fan motor FAN MOTOR INDOOR CONTROLLER BOARD Check outdoor fan motor 6 Check operating condition of refrigerant circuit Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit clogs Bypass circuit of outdoor unit is defective Slight temperature difference between indoor room temperature and pipe liquid or condenser evaporator temperature thermistor e Shortage of refrigerant e Disconnected holder of pipe Check pipe liquid or condenser evaporat
29. r be sure to turn off the remote controller first to stop the main unit and then turn off the breaker When removing the indoor controller board hold the edge of the board with care NOT to apply stress on the components When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires x Q re Lead wires Housing point 14 7 2 SELF CHECK FUNCTION e Refer to the installation manual that comes with each remote controller for details e RF thermostat is not established Output pattern A Errors detected by indoor unit Wired remote controller IR wireless remote controller RF thermostat Beeper sounds OPERATION Symptom INDICATOR lamp flashes Check code Number of times Pipe Liquid or 2 phase pipe sensor error Pe FreezmgOverea ngsafeguardoperaion EE Communication error between indoor and outdoor unts Ppetempeaueemr OC 10 11 12 Indoor unit control system error memory error etc No sound No corresponding Output pattern B Errors detected by unit other than indoor unit outdoor unit etc Wired remote controller Beeper sounds OPERATION Symptom INDICATOR lamp flashes Check code Number of times E9 Indoor outdoor unit communication error Transmitting error Outdoor unit Compressor overcurrent interruption U3 U4 Open short of outdoor unit thermistors Compressor overcurrent interruption W
30. r on and check restart after utes The unit returns to normal opera failure of thermistor wiring o Conector dq Operate in test run mode and check pipe tion if it has normally reset Temperature of thermistor is evaporator gt Constantly detected during cooling dry 90 C 194 F or more or If pipe condenser evaporator tempera ing and heating operation except 40 C 40 F or less caused by is extremely low in cooling mode or defrosting defective refrigerant circuit high in heating mode refrigerant circuit Short 90 C 194 F or more Defective indoor controller may have defect Open 40 C 40 F or less board amp When no problems are found in above replace the indoor unit control board Remote controller transmission Contact failure at transmission Check disconnection or looseness of indoor error EO signal receiving error E4 wire of remote controller unit or transmission wire of remote controller D Abnormal if main or sub remote con All remote controllers are set Set one of the remote controllers main troller can not receive normally any as sub remote controller In If there is no problem with the action above transmission from indoor unit of refriger this case EO is displayed on 9 Check wiring of remote controller ant address 0 for three minutes remote controller and E4 is Eu t ou displayed at E EN LED2 e The n
31. ter will turn off when DEFROST or ERROR is displayed Set temp Set temp 1 8 F 1 C Set temp 4 5 F 2 5 C Heater output x Heater OFF Inlet air temp gt settemp Heater ON Inlet air temp lt set temp 1 8 F 2 5 C The fan will drive and the heater will turn on when DEFROST or ERROR is displayed Set temp Set temp 1 8 F 2 5 C Heater output Refer to the Installation Manual for function settings 6 2 Fan control By setting the Mode No 23 in the Function Table in section 6 1 to 2 and using CN4Y on the optional parts PAC YU25HT the following patterns of fan control will become possible when DEFROST or ERROR is displayed Fan control patterns when DEFROST or ERROR is displayed insted inthe uct No heater is insted inthe dut A If a heater is installed the duct do not use CN4Y By doing so the fan will turn off when the heater is on which may result in fire 1 Fan speed setting Mode no Setting Initial setting Heating Thermo OFF DEFROST or ERROR Veybw a 1 O Remote controller setting Remote controller setting 5 3 Refer to the Installation Manual for function settings 11 O 6 3 PAC YU25HT Optional Parts installation The following section describes installation of the External Heater Adapter that connects to PEA A AA4 series indoor unit This products is the special wiring parts to drive an e
32. ternal finish Galvanized External dimension mm 200 x 990 x 700 HxWxD 7 718 x 39 x 27 9116 Wiring in 1 8 1 6 Refrigerant Liquid R410A 91 4 96 35 Flare 91 4 06 35 Flare piping diameter mm 01 2 012 7 Flare Drainpiping diameter i O D 1 1 4 32 Sound level Low Mid High dB lt A gt l il x N 5 3 3 3 3 5 5 3 3 Insulation material Polystyrene foam Polyethylene foam Urethane foam Polystyrene foam Polyethylene foam Urethane foam Air filter PP Honeycomb fabric washable PP Honeycomb fabric washable Refrigerant control device ae 7 777 A ol LI measured in anechoic room 23 28 33 30 34 38 i Heat exchanger Cross fin Aluminum fin and copper tube Cross fin Aluminum fin and copper tube Varistor ERZV10D471 ERZV10D471 Terminal block To outdoor unit 3P To wired remote controller 2P To outdoor unit 3P To wired remote controller 2P Document Installation Manual Instruction Book Installation Manual Instruction Book Accessory Drain hose flexible joint LM ae x C Note 1 Cooling Heating capacity indicates the maximum value at operation under the following condition Cooling Indoor 80 FD B 67 FW B 26 7 CD B 19 4 CW B Outdoor 95 FD B 35 CD B Heating Indoor 70 FD B 21 1 CD B Outdoor 47 FD B 43 FW B 8 3 CD B 6 1 CW B Pipe length 24 9 16ft 7 5m Height difference Oft Om 2 Power consumption Run current at 0 060 in
33. the breaker e When AC 208 230V is detected Check below Defective outdoor controller circuit board Check the voltage between outdoor terminal block S1 and S2 e When AC 208 230V is not detected Check the fuse on outdoor controller circuit board Check the wiring connection e When AC 208 230V is detected Check below Power supply of 208 230V is not supplied to indoor Check the voltage between indoor terminal unit block S1 and S2 e When AC 208 230V is not detected Check indoor outdoor unit connecting wire for mis wiring e When AC 208 230V is detected Check below Defective indoor controller board Check the fuse on indoor controller board Check the wiring connection If no problem are found indoor controller board is defective 2 LED2 on indoor controller board When LED1 on indoor controller board is also blinking Check indoor outdoor unit connecting wire is blinking Connection failure of indoor outdoor unit connecting for connection failure wire e When LED1 is lit D Mis wiring of remote controller wires D Check the connection of remote con Under twin triple indoor unit system 2 or more indoor troller wires in case of twin triple indoor units are wired together unit system When 2 or more indoor units are wired in one refrigerant system connect remote controller wires to one of 2 Refrigerant address for outdoor unit is wrong or not those units set 2 Check the settin
34. tor CNMF for the motor with the power supply on It causes trouble of the indoor controller circuit board and fan motor Self check Symptom The indoor fan cannot turn around Check the fuse FUSE on indoor controller board Check the drain pump DP Is the resistance between terminals normal Replace indoor controller board I B Replace fan motor MF Did the fuse blow gt Yes gt JV No Y Wiring contact check No Contact of fan motor connector CNMF v Replace drain pump DP Is there no contact failure No gt Yes Power supply check Remove the connector CNMF Measure the voltage in the indoor controller circuit board TEST POINT Voc between 1 and 4 of the fan connector Voc DC310 340V TEST POINT Vcc between 5 and 4 of the fan connector Vcc DC15V v Is the voltage normal Yes gt Replace the fan motor J No v Yes OK Check the operation of fan gt Replace indoor controller board Y NG Replace indoor controller board Check the operation gt END V NG Replace the fan motor M 24 DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts PEA A12AA4 PEA A18AA4 1 Control box 1 Removing the control box cover 1 Remove the two fixing screws on the cover A to remove it Fig 2 2 Thermistor Intake air 1 Remove the control box cover according to the procedure in section
35. umber of connecting indoor units Abnormal if sub remote controller could on the outdoor controller circuit max 16units not receive for any signal for two min board The number of connecting remote con utes Error code EO 9 Mis wiring of remote controller troller max 2units Defective transmitting receiving Abnormal if indoor controller board can circuit of remote controller When it is not the above mentioned problem of not receive normally any data from Defective transmitting receiving D G EO remote controller board or from other circuit of indoor controller board 0 Diagnose remote controllers or indoor controller board for three minutes of refrigerant address 0 a When RC OK is displayed E4 Error code E4 Noise has entered into the Remote controllers have no problem Turn the power off and on again to check Indoor controller r nnot receive transmission wire of remote 2 Indoor O cnt E If abnormality generates again replace any signal from remote controller for two controller ndoorcontrolior board minutes Error code E4 b When RC NG is displayed Replace remote controller c When RC is displayed d When ERC 00 06 is displayed c d Noise may be causing abnormality If the unit is not normal after replacing indoor controller board in group control indoor controller board of address 0 may be abnormal Remote controller transmission

Service Manual - GoDuctless.com

Contents

Download Pdf Manuals

Related Search

Related Contents