Indoor Horizontal Ducted Unit Service Guide
Contents
1. O eR si Ni AS 4 a UN 5 1 Jl i we 7 G H Fig 8 27 ee Exercise caution when removing heavy parts 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 SEXES Se Fig 9 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 B Exercise caution when removing heavy parts 6 Bearing PEA A18AA 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 Fig2. lt s Ue 77 220 lt G ZZ CREE 2 fr o r T rIOZ o rOZ 4c lt lt 2 LE 00 8 amp q oo 8 s q uc uc o aeqri 200070 gp 0 gp SYNSSAYd ANNOS 3AV19O Q Een aeqri z00070 gp 0 gp 134371 SYNSSAYd ANNOS ANYA 3AVL9O i S o i S co eed ded dede eel eed de te pn PPI seme lf el eed fa fh 4000 4000 2000 TE 1000 500 BAND CENTER FREQUENCIES Hz 500 BAND CENTER FREQUENCIES Hz b ae B 0 aA x G tO e h t O LO s9 t O gt t E22 t S522 mur m ur ofS E 65 6oh S 6660 S G c w 4 5 PH lt LA S 2 lt Q Q LI eqr z00070 gp gp 13431 AYNSSAYd ANNOS 3AV19O A im eqr z00070 gp 0 gp 13437 I4NSSIYd ANNOS ANYA 3AVLOO may be bigger than displayed level under actual installation condition by surrounding echoes The sound level NOTE The sound level is measured in an anechoic room where echoes are few when compressor stops The sound can be higher by about 2 dB than the displayed level during cooling and heating operation INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW PEA A12AA External static pressure 0 020 in WG 5Pa 208 230V 60Hz External
3. ESE 80 SPL 0 0002 ubar N 2 Q o z z O Q e o 5 e WA MAP AA AAAA A Mooiee D 5 e N e FAA a eee ete WI 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz 60Hz SPL LB LINE PEA A12AA External static pressure 0 200 in WG bOPa i HHB 90 80 ESE 70 0 0002 ubar wm IM taa z Q d o 60 50 Fa 2 e 40 30 20 pus TERESHOLD OF HEARING FOR CONTINUOUS NOISE ia ae 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz z Q A 2 C e Li EN p AE A E 1 A E EE P 7 et OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB m m 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 el fo oe il TMM ee eed del dl pn lt 60Hz gt 8000 lt 60Hz gt 8000 4000 4000 2000 2000 1000 TE ET 500 500 BAND CENTER FREQUENCIES Hz 250 BAND CENTER FREQUENCIES Hz ji bo t Y 226 AV Qo M 9 A s 5 G tO ao HS dot 2359 lt m I
4. Llc _ EE Ec A St WM J t t t n FS TH2 TH5 TH1 Drainpump SYMBOL EXPLANATION CONNECTOR LOSSNAY H2 H5 CONNECTOR REMOTE SWITCH COND EVA TEMP THERMISTOR CONNECTOR HA TERMINAL A iF FLOAT SWITCH Eee Ips INDOORIOUTDO R CONNECTING LINE EARE LOCATON CN90 CONNECTOR WIRELESS T POWER SUPPLY I B REMOTE CONTROLLER TRANSMISSION LINE 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 matching terminal numbers S1 S2 S3 3 Symbols used in wiring diagram above are Q Connector 9 Terminal 4 Use copper supply wire CONNECTOR BACK UP HEATING PIPE TEMP THERMISTOR LIQUID FS 10 5 REFRIGERANT SYSTEM DIAGRAM PEA A12AA PEA A18AA 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 r Flare A Pipe temperature Room temperature thermistor liquid thermistor TH1 TH2 Distributor d 11 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
5. 0 57 67 to 86 19 to 30 DIA x B x LI 5 3 3 1 8 1 6 5 3 3 piping diameter Gas R410A i Drain piping diameter in 2 3 3 5 3 3 i Remark SOUND CRITERION CURVES lt 60Hz gt PEA A12AA SPL dB External static pressure Midde 28 0 020 in WG 5Pa Low 23 90 s s W W s u 80 0 0002 ubar sama 77 f we Le 70 e 60 gt o e 50 40 30 N A 20 PPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS E 10 F 1 63 12 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz gt e oe e OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB AB o e e OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB o o bel deo dle Ae TUNES PEA A12AA LINE External static pressure 0 140 in WG 35Pa SPL i HE 90 80 ESE 70 0 0002 ubar J e 60 50 e CUA 40 30 20 TERESHOLD OF HEARING FOR ours eff eee z Q A e OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB i z E N TL ak SS SSS TED mue i A 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz lt 60Hz gt LINE PEA A12AA External static pressure 0 060 in WG 15Pa
6. 15 4 Removing the Heat exchanger 1 Remove the fixing screws on the heat exchanger M to remove it Fig 16 29 Mir SLIM s MITSUBISHI ELECTRIC CORPORATION Mis ublication effectiv e Specific a uU ect to withou HWE0807A Firs edition published in Oc Eus
7. tempera ture is extremely low in cooling mode or high in heating mode refrigerant circuit may have defect amp When no problems are found in above replace the indoor unit control board D Check disconnection or looseness of indoor unit or transmission wire of remote controller 2 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 Do not use cable X 3 or more e The number of connecting indoor units max 16units e The number of connecting remote con troller max 2units When it is not the above mentioned problem of O Diagnose remote controllers a When RC 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 is displayed Replace remote controller c When RC is displayed d When ERC 00 06 is displayed c d 5Noise 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 Set a remote controller to main and the other to sub 2 Remote controller is connected with only one indoor unit 8 The address changes to a separate setting Diagnose remote controller a When RC OK is displayed remote con trollers h
8. 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 1 1 Pull out the thermistor holder B and thermis tor C on the control box Fig 3 20 k 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 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 H on the copper tube Liquid pipe e3 8inch o8mm Condenser evaporator 2 1 4 Thermistor size P
9. 1 button return sign button Test Run button Service button Clear button Airflow Up Down button Louver button V Operation button CV To preceding operation number Ventilation button A Operation button CA To next operation number Display Sensor indication Displayed when the remote controller Day of Week sensor is used ne Shows the current day of the week all parts of the display are shown as lit During actual operation only the relevant items will be lit Time Timer Display Vue Locked indicator Indicates that remote controller but tons have been locked Shows the current time The 12 hour clock or The 24 hour clock unless the simple or Auto Off timer is set If the simple or Auto Off timer is set shows the time remaining Identifies the current operation Shows the operating mode etc Multilanguage display is sup Clean The Filter indicator ported TIME SUN MON TUE WED THU FRI SAT TIMER I1 1 l Hr oN AFTER LULL AFTER OFF ERROR CODE IILI EC Centrally Controlled indicator FC Sul I E A i ONLY1Hr Indicates that operation of the re mote controller has been prohib ited by a master controller Up Down Air Direction indica Room Temperature display Ventilation indicator Timer Is Off indicator ANONSE fOO EMPe ratia Appears when the unit is running in The indicato
10. 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 14 7 TROUBLESHOOTING 7 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the followings D Check the power supply voltage 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care the followings during servicing Before servicing the air conditioner 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 Lead wires Housing point 7 2 SELF CHECK FUNCTION Wired remote controller 1 Turn on the power 2 Press the CHECK button twice 3 Set refrigerant address with TEMP button if system control is used 4 Press the ON OFF button to stop the self check CHECK button Indoor Unit s Refrigerant address TEMP button IC Indoor unit OC Outdoor unit Check code Indoor Unit No For description of each check code refer to the following table D Check code P 1 P2 x 7 Compressor overcurr
11. 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 setting 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 300 Remove remote controller wires and check LED2 on indoor controller board e When LED2 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 b 7 5 TEST POINT DIAGRAM 7 5 1 Indoor controller board PEA A12AA PEA A18AA Fuse 6 3A 250V CNO1 SWE SW1 SW2 CN32 CN24 CN22 CN51 CN41 CN44 CN4F CN20 CN3C CNMF CNP CN2L CN4Y CN90 4 e t VEG de sii 3E lt gt 3 NE NE PLI wt oW yo y te 0207 r Vsp 217 22 Power supply voltage 208 230VAC Emergency operation Model selection Capacity se
12. static pressure in WG Pa 6 7 8 9 10 11 212 247 282 318 353 388 Airflow rate m min CFM PEA A12AA External static pressure 0 140 in WG 35Pa 208 230V 60Hz External static pressure in WG Pa 6 7 8 9 10 212 247 282 318 353 388 Airflow rate m min CFM PEA A12AA 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 A12AA External static pressure 0 200 in WG 50Pa 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 A18AA External static pressure 0 020 in WG 5Pa 208 230V 60Hz External static pressure in WG Pa Rated point 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 A18AA External static pressure 0 140 in WG 35Pa 208 230V 60Hz 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 A18AA External static pressure 0 060 in WG 15Pa 208 230V 60Hz 20 T External static pressure in WG P 9 10 11 12 13 14 15 16 17 18 19 818 353 388 424 459 494 530 565 600 636 671 Airflow rate m min CFM PE
13. the indoor units as shown in Table 1 Table 1 Function table Select unit numbers 01 to 03 or all units AL wired remote controller O7 wireless remote controller Wem Sethe Ss ista Heater control Heater OFF Inlet air temp 2 set temp Heater ON Inlet air temp lt set temp 4 5 F 2 5 C The fan will stop and the heater will turn off when DEFROST or ERROR is displayed 1 Set temp i 2 Set temp 1 8 F 1 C 4 5 2 5 Heater output OFF n Heater OFF Inlet air temp 2 set temp 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 No heater is installed in the duct AN If a heater is installed in 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 2 Mode no Setting Initial setting Heating Thermo OFF DEFROST or ERROR Fan con
14. 0 20 5 15 35 50 Motor type DC brushless molor am Directrven TT 7 090170 CEM EEE L S 116 150 183 External finish Galvanized External dimension mm 200 x 990 x 700 Exe 7 7 8 x 39 x 27 9 16 Wiring in Refrigerant Liquid R410A 01 4 06 35 Flare 01 2 012 7 Flare 00 1 9 82 32 Sound level Low Mid High measured in anechoic room ee 23 28 33 30 34 38 Insulation material Polystyrene foam Polyethylene foam Urethane foam Air filter PP Honeycomb fabric washable Refrigerant control device ee C C Protection devices Fuss 2507 63 Heat exchanger Cross fin Aluminum fin and copper tube Varistor ERZVIOD47 Terminal block To outdoor unit To wired remote controller 2P Power outlet Standard Document Installation Manual Instruction Book attachment Accessory Drain hose flexible joint Wired Remote Controller Drain hose flexible joint Wired Remote Controller k G N n o O 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 WG 15Pa external static pressure 3 Cooling capacity value at 1 1system Heating capacity value at 1 1system Power source Power input Current 0 07
15. A A18AA static pressure 0 200 in WG 50Pa 208 230V 60Hz 0 32 70 Z T 60 0 24 50 0 20 5 Rated point UN D o 40 amp 0 16 s 30 5 Q 20 1 318 353 388 424 459 494 530 565 600 636 671 Airflow rate m min CFM 3 OUTLINES AND DIMENSIONS PEA A12AA Unit mm in PEA A18AA 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 Z 37 1 15 32 i L 02 9 1 8 88 3 15 32 Air z inlet Air outlet D Duct S 1 x X DO OKO ROR ee XA 55 SS AKA OX 255 000004 lt 1929 0 B Suspension bolt pitch x x x 88 3 15 32 A e T 24 P Le TT TT po TI u Si A i i ES Xx Q Air filter S x 10 13 32 e Tyo T SIg s 49 625 Suspension bolt pitch oF S 1 15 16 24 5 8 o amp _ Drain 0 0 032 1 1 4 SIS Knockout hole 227 1 3 32 q 700 27 9 16 s ER 69 Indoor outdoor connecting line m e 22699 Arras US MEL TITO r cz 1013 32 Control box SIEIS 2 a Remote controller transmission line an aye ane UU i l r lt AG 81 ji E
16. Changes for the Better MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS March 2009 No HWE0807A TECHNICAL amp SERVICE MANUAL Series PEA Ceiling Concealed R410A Indoor unit Model names PEA A12AA PEA A18AA CONTENTS 1 PART NAMES AND FUNCTIONS 2 2 SPECIFICATIONS 4 3 OUTLINES AND DIMENSIONS 9 A WIRING DIAGRAM 10 5 REFRIGERANT SYSTEM DIAGRAM 11 6 HEATER CONTROL 12 7 TROUBLESHOOTING eee 15 8 DISASSEMBLY PROCEDURE 25 1 PART NAMES AND FUNCTIONS Indoor Unit PEA A12AA PEA A18AA Air outlet Air outlet duct flange Air inlet Wired remote controller Once the controls are set the same operation mode can be repeated by simply pressing the ON OFF button e Operation buttons Set Temperature buttons Down Cv CA Up Timer Menu button Monitor Set button Mode button Return button Set Time buttons Back CA Ahead Timer On Off button Set Day button Opening the J IR EA MITSUBISHI ELECTRIC D ON OFF MMOG63se OMENU ONOFF Sal S FILTER El S que mL 25 BACK MONITOR SET DAY A 38f a 21MAA 1 PREMO a C PAR CLOCK VOPERATONA L1 B c zr m c x j D aT 1 I C 1 Start Stop button Fan Speed button Filter
17. ONTROLLER BOARD Check method of DC fan motor fan motor indoor controller circuit board D Notes High voltage is applied to the connecter CNMF for the fan motor Give attention to the service Do not pull out the connector 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 Replace fan motor MF Did the fuse blow Yes gt V No v Wiring contact check No Contact of fan motor connector CNMF v Replace drain pump DP Is there no contact failure No gt Jy Yes Power supply check Remove the connector 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 Y V No Y Yes OK Check the operation of fan gt Replace indoor controller board Y NG V Replace indoor controller board OK Check the operation gt V NG Replace the fan motor 8 DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts PEA A12AA PEA A18AA
18. S ul L 4 Ke thee L L L NX I E e Terminal block Indoor outdoor connecting line 4 19 32 V Terminal block Remote controller transmission line Drain 0 032 1 1 4 Spontaneous draining 2 2 02 9 1 8 Refrigerant piping Refrigerant piping flare connection gas flare connection liquid Less than 300 PM N w ge Lola c S N 5 P m 8 Make the access door at the appointed position properly for service maintenance Drain hose 1 D 32 1 1 4 lt accessory gt mm in Model A B C D E F G H J K L M N OGaspipe Liquid pipe 900 952 998 860 0 700 10 990 PEA A12AA 1 2 27 9 40 2 012 7 1 2 o6 35 1 4 1100 1152 1198 1060 PEA ATBAA E 38 EET ES 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 A12AA model which has 2 fans PEA A18AA 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 A12AA PEA A18AA INSIDE SECTION OF CONTROL BOX ECC NNNM TB15 TO MA REMOTE 95 CONTROLLER SS L LB x x x x x LED3 CN90 000000000 L Te4 l S2 MEN c 53 o 1 OUTDOOR x
19. after three Breaking of wire or contact inserting connector again minutes The unit returns to normal failure of thermistor wiring Check pipe liquid temperature with remote operation if it has normally reset Defective refrigerant circuit is controller in test run mode If pipe liquid 2 Constantly detected during cooling causing thermistor temperature temperature is extremely low in cooling P2 drying and heating except defrosting of 90 C 194 F or more or mode or high in heating mode refrigerant operation 40 C 40 F or less circuit may have defective Short 90 C 194 F or more Defective indoor controller board Check pipe liquid temperature with remote Open 40 C 40 F or less controller in test run mode If there is extreme difference with actual pipe liquid temperature replace indoor controller board Turn the power off and on again to operate after check Contact failure of drain float switch CN4F Contact failure of connector D Check contact failure of float switch connec D Extract when the connector of drain float Insert failure tor switch is disconnected Turn the power on again and check after P4 and of connector CN4F is not inserting connector again 5701 short circuited Defective indoor controller 9 Operate with connector CNAF short circuited Constantly detected during operation board Replace indoor controller board if abnormali ty reappears Constantl
20. ave 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 RC E3 or ERC 00 66 is displayed noise may be causing abnormality 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 T D Check disconnection 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 s
21. ed wiring A basic connection method is shown below oe Indoor unit Remote control board Relay circuit Adapter control board ee i LL s S dE ERE T Ir LB am FE id q s I EE I i T X il White 1 o Electric Heater T E T 3 heater applicable only when a panel Se U s _ _ theHerisconneded _ _ e Preparations in the field Maximum cable length is 10 m 32ft 13 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 FS1 H1 R UU 1 phase s I power supply 88H FS2 in 208V 230 60 2 R G s i Wiring diagram s Se 88H FS2 26H 88H D Pu Control board D CN24 4 Wiring restrictions FS1 2 Thermal fuse H1 H2 Heater 26H Overheat protection thermostat 88H Electromagnetic contactor Keep the length of the cable
22. ent interruption For details check the LED display Abnormal temperature of heat sink As for outdoor unit refer to D see U7 U9 UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit Current sensor error Others Other errors Refer to the technical manual for the outdoor unit On wired remote controller Check code displayed in the LCD 15 ee e If the unit cannot be operated properly after the test run has been performed refer to the following table to remove the cause Symptom Cause Wired remote controller LED 1 2 PCB in outdoor unit For about 2 After LED 1 2 are lighted LED 2 is For about 2 minutes after power on op PLEASE WAIT minutes after turned then only LED 1 is eration of the remote controller is not possible power on lighted Correct operation due to system start up Correct operation eConnector for the outdoor unit s protection Only LED 1 is lighted device is not connected PLEASE WAIT Error code After about 2 LED 1 2 blink Reverse or open phase wiring for the outdoor minutes has unit s power terminal block L1 L2 L3 Only LED 1 is lighted e Incorrect wiring between indoor and outdoor LED 1 blinks twice Units incorrect polarity of S1 S2 S3 LED 2 blinks eRemote controller wire short Display messages do not appear even when operation switch is turned ON operation lamp does not light u
23. erature of thermistor is 90 C 194 F or more or 40 C 40 F or less caused by defective refrigerant circuit Defective indoor controller board 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 9 Mis wiring of remote controller Defective transmitting receiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board of refrigerant address 0 8 Noise has entered into the transmission wire of remote controller Two remote controller are set as main In case of 2 remote con trollers Remote controller is connected with two indoor units or more Repetition of refrigerant address Defective transmitting receiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board 8 Noise has entered into trans mission wire of remote con troller 19 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 and check restart after inserting connector again Operate in test run mode and check pipe condenser evaporator temperature If pipe condenser evaporator
24. ignal 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 Indoor outdoor unit communication Defective transmitting receiving 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 9 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 Defective indoor controller D 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 D Defective remote controller D 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 C Check 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 o
25. l if the board Insert failure 30 C 86 F 4 3kQ unit does not reset normally after three Breaking of wire or contact 40 C 104 F 3 0kQ minutes The unit returns to normal failure of thermistor wiring If you put force on draw or bend the lead wire operation if it has normally reset Defective indoor controller with measuring resistance value of thermistor Constantly detected during cooling board breaking of wire or contact failure can be drying and heating operation detected Bi Short 90 C 194 F or more Check contact failure of connector CN20 on Open 40 C 40 F or less 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 Pipe temperature Defective thermistor 0 9 Check resistance value of thermistor thermistor Liquid TH2 characteristics For characteristics refer to P1 above The unit is in three minute resume Contact failure of connector Check contact failure of connector CN44 on prevention mode if short open of CN44 on the indoor controller the indoor controller board Refer to 7 5 Turn thermistor is detected Abnormal if the board Insert failure the power on again and check restart after unit does not reset normally
26. lds Refer to 7 7 DC Fan motor FAN MOTOR INDOOR CONTROLLER BOARD Check outdoor fan motor Check operating condition of refrigerant circuit 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 5 Check operating condition of refrigerant circuit D Check pipe liquid or condenser evaporator temperature with room temperature display on remote controller and outdoor controller circuit board Pipe liquid or condenser evaporator temperature display is indicated by setting SW2 of outdoor controller circuit board as follows Conduct temperature check with outdoor controller circuit board after connecting A Control Service Tool PAC SK52ST Check converse connection of extension pipe or converse wiring of indoor outdoor unit connecting wire EO or E4 E3 or E5 Abnormality of pipe temperature ther mistor Condenser Evaporator TH5 The unit is in three minute resume pro tection mode if short open of thermistor is detected Abnormal if the unit does not get back to normal within three min utes The unit returns to normal opera tion if it has normally reset 2 Constantly detected during cooling dry ing and heating operation except defrosting Short 90 C 194 F or more Open 40 C 40 F or less Remote controller transmission error EO signal receiving erro
27. n 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 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
28. or drying mode D 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 Defective outdoor fan control amp 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 e Indoor controller board is defective Defective outdoor fan control amp 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 liquid or condenser evaporator thermistor Defective refrigerant circuit 2 Converse connection of extension pipe on plural units 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 18 l Cooling or drying mode Check clogging of the filter 2 Remove shie
29. p On the wireless remote controller with condition above following phenomena take place No signals from the remote controller are accepted Operation lamp is blinking The buzzer makes a short piping sound Note Operation is not possible for about 30 seconds after cancellation of function selection Correct operation For description of each LED LED1 2 3 provided on the indoor controller refer to the following table LED1 power for microcomputer Indicates whether control power is supplied Make sure that this LED is always lit LED2 power for remote controller 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 0 LED3 communication between indoor and Indicates state of communication between the indoor and outdoor units outdoor units Make sure that this LED is always blinking 16 J 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 Room temperature Defective thermistor 0 9 Check resistance value of thermistor thermistor TH1 characteristics 32 F 15 0kQ The unit is in three minute resume Contact failure of connector 10 C 50 F 9 6kQ prevention mode if short open of CN20 on the indoor controller 20 C 68 F 6 3kQ thermistor is detected Abnorma
30. r E4 Abnormal if main or sub remote con troller can not receive normally any transmission from indoor unit of refriger ant address 0 for three minutes Error code EO 2 Abnormal if sub remote controller could not receive for any signal for two min utes Error code EO 0 Abnormal if indoor controller board can not receive normally any data from remote controller board or from other indoor controller board for three minutes Error code E4 Indoor controller board cannot receive any signal from remote controller for two minutes Error code E4 Remote controller transmission error E3 signal receiving error E5 D Abnormal if remote controller could not find blank of transmission path for six seconds and could not transmit Error code E3 2 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 2 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 Defective thermistor characteristics Contact failure of connector CN44 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Temp
31. r N shows the direc Ventilation mode Indicates that the timer is off tion of the outcoming airflow Louver display Indicates the action of the swing One Hour Only indicator Displayed if the airflow is set to Low and downward during COOL Temperature Setting or DRY mode Operation varies Power On indicator Shows the target temperature according to model Indicates that the power is on The indicator goes off after one louver Does not appear if the louver is stationary hour at which time the airflow di rection also changes Caution Only the Power on indicator lights when the unit is stopped and power supplied to the unit f you press a button for a feature that is not installed in the indoor unit the remote controller will display the Not Available message If you are using the remote controller to operate multiple indoor units this message will appear only if the feature is not present at the parent unit When power is turned ON for the first time it is normal that PLEASE WAIT is displayed on the room temperature indication For max 2minutes Please wait until this PLEASE WAIT indication disappears then start the operation 2 SPECIFICATIONS Capacity Cooling Heating Heating 12000 pO 17200 20100 208 230V 60Hz 009 O 0 07 0 63 Temperature set range Remote controller FCC 63 to 83 17 to 28 Airflow direction SEMEN Fan Sirocco fan x in WG Pa 0 02 0 06 0 14
32. r started 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 C 158 F 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 3 deg C 5 4deg F TH5 TH1 Cooling
33. ther 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 multiple 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 liquid ther controller and indoor pipe liquid 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 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 When LED1 o
34. trol o2 1 O Remote controller setting Remote controller setting o Refer to the Installation Manual for function settings 12 119951111114 1 15 5555 3X 6 3 PAC YU25HT Optional Parts installation The following section describes installation of the External Heater Adapter that connects to PEA A AA series indoor unit This products is the special wiring parts to drive an electric 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 PAC YU25HT Z 3 Locally procur
35. tting Remote start stop adapter Heater control 12VDC For MA remote controller cable 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 24V DC Fan motor output 1 4 310 340 VDC 5 4 15VDC 6 4 0 6 5 VDC 7 4 Stop 0 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 7 6 TROUBLE CRITERION OF MAIN PARTS PEA A12AA PEA A18AA Check method and criterion Hoom temperature Measure the resistance with a tester a Part temperature 10 C 50 F 30 C 86 F Pipe temperature TD thermistor liquid 8kQ 20kQ Opened or short circuited TH2 Condenser evaporator temperature thermistor TH5 Wiring diagram Vcc Power supply for control Vsp Speed command voltage PG Pulse output for rotation 23 l j 7 7 DC FAN MOTOR FAN MOTOR INDOOR C
36. y detected during drain pump On moving part of float switch down operation Defective indoor controller Replace indoor controller board if it is short board circuited between of the drain float switch connector CN4F 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 Drain overflow protection operation Malfunction of drain pump D Check if drain up machine works D Suspensive abnormality if drain float Defective drain Check drain function switch is detected to be underwater for 1 Clogged drain pump minute and 30 seconds continuously Clogged drain pipe with drain pump on 3 Defective drain float switch Remove drain float switch connector CNAF Turn off compressor and indoor fan Catch of drain float switch or and check if it is short Switch On with the Drain pump is abnormal if the condition malfunction of moving parts moving part of float switch UP or OPEN with above is detected during suspensive cause drain float switch to be the moving part of float switch down abnormality detected under water Switch Replace float switch if it is short with the P5 17 Freezing overheating protection is working Freezing protection Cooling mode The unit is in six minute resume prevention mode if pipe liquid or condenser evap orator temperature stays under 15 C 5 F for three minutes after the compresso
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