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Mitsubishi Electronics MUY-GE12NA Air Conditioner User Manual

Contents

1. lt 4 VAC Fuse F801 MUZ AC 208 230 V 250 V 3 15 A o odeoooccfes fF e220 ofo Ow i AME BH m OR JN i 2 ae 2 o o o o m Bir es is NOI ire ee Soe 4 901 ERIT ml plc 3e T315AL250V B mi i j E Meel Bom i X EE yup ES moi gs Output to m z er Ob a Oy o drive d T H a 89 4 O0 ES compressor m men E ER gr AC 208 LDU Eo jl oot FINS Od 230 V IUDAS is gore of o LDV BEL 3 i ae 3 D gt ME m LDW 4 HE oy Os ia ie wae tne e fe as 4 RE E De 6 2 gt Oii y ej iq REL 3 HU De usc ope alow x ze ES UST Nees Re ee gt ek dix N A Wl d o o e E EUN Ey mE EN zi NSU c 2 OU mem 3 Wi NX s S n o SS m Eo 0 120 mm wc un dT OG E ae PS 2 2 Ru 2 oe c g2 8 X de mx o O5 SE 209 DX BN 88 8 6 0 lt ao
2. Airoutlet Drain outlet SPECIFICATION Outdoor unit model MUZ GEO9NA MUY GEO9NA MUZ GE12NA MUY GE12NA Capacity Rated Minimum Maximum Cooling 1 9 000 3 800 12 200 9 000 3 800 12 200 12 000 3 800 13 600 12 000 3 800 13 600 Heating 47 1 10 900 4 500 14 100 14 400 5 500 18 100 Capacity Heating 17 2 8 700 11 200 Power consumption Rated Minimum Maximum Cooling 1 660 205 1 200 660 205 1 200 960 205 1 300 960 205 1 300 Heating 47 1 760 255 1 200 1 170 340 1 660 Power consumption Heating 17 2 950 1 200 EER 1 SEER 43 Cooling 13 6 21 0 136 210 12 5 20 5 HSPF IV 4 Heating 10 0 10 0 1252051 Heating 441 4 20 3 61 Power supply V phase Hz 208 230 1 60 Max fuse size time delay A 15 Min circuit ampacity A 12 12 12 12 Fan motor F L A 0 50 Compressor KNBO73FQDHC KNB092FQAHC R L A 6 6 4 9 6 6 4 9 L R A 8 2 6 1 8 2 6 1 Refrigeration oil cc Model 320 NEO22 Refrigerant control Linear expansion valve Sound level 1 Cooling dB A 46 49 Heating dB A 51 Defrost method Reverse cycle Dimensions W
3. Check of coil MUZ First of all measure the resistance of R V coil to check if the coil is defective Refer to 10 4 x In case CN721 is disconnected or coil is open voltage is generated between the terminal pins of the connector although no signal is being transmitted to R V coil Check if CN721 is connected Unit operates COOL mode even if it is set to HEAT mode Disconnect connector CN61 between the compressor and the Is there 208 230 VAC between CN721 intelligent power module and on the inverter P C board 3 Replace the inverter Turn ON the power supply and minutes after the power supply is turned No board press EMERGENCY OPERATION ON Switch twice HEAT mode Yes Replace the 4 way valve Unit operates HEAT mode even if it is set to COOL mode Disconnect connector CN61 between the compressor and the Is there 208 230 VAC between CN721 intelligent power module OD and on the inverter P C board 3 Replace the inverter Turn ON the power supply and minutes after the power supply is turned Yes P C board press EMERGENCY OPERATION ON switch once COOL mode No Replace the 4 way valve 31 D Check of outdoor fan motor MUZ GE09 12 15NA MUY GE09 12 15NA and measure the resistance of the outdoor fan motor CN932 from the inverter P C board Y Is the resistanc
4. OFF motor Heating EE PIECE ERAN ES ON Cooling 5 raf s Aad OFF earn NOTE The 4 valve reverses for 5 seconds right before start up of the compressor COOL HEAT 5 seconds 5 seconds ON EE Compressor _ 8 3 RELATION BETWEEN MAIN SENSOR AND ACTUATOR Actuator Outdoor fan Indoor fan motor motor Sensor Purpose Compressor Discharge temperature thermistor Protection Q Cooling Coil frost prevention Indoor coil temperature thermistor Heating High pressure protec tion Defrost thermistor MUZ Heating Defrosting Fin temperature thermistor Protection Ambient temperature Cooling Low ambient tempera thermistor ture operation Cooling Low ambient tempera Outdoor heat exchanger tem ture operation perature thermistor Cooling High pressure protec tion 22 9 SERVICE FUNCTIONS MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUY GEO9NA MUY GE12NA MUY GE15NA MUY GE18NA 9 1 CHANGE IN DEFROST SETTING MUZ Changing defrost finish temperature JS To change the defrost finish temperature cut solder the JS wire of the outdoor inverter P C board Refer to 10 6 1 Defrost finish temperature dumper 02 09 1215 MUZ GE18 Soldered PEDEM Initial setting 47 F C 48 F 9 C Cut 50 F 10 C 64 F 18 C 9 2 PRE HEAT CONTROL SETTING
5. PRE HEAT CONTROL When moisture gets into the refrigerant cycle it may interfere the start up of the compressor at low outside tempera ture The pre heat control prevents this interference The pre heat control turns ON when outside temperature is 68 F 20 C or below When pre heat control is turned ON compressor is energized About 50 W lt JK gt To activate the pre heat control cut the JK wire of the inverter P C board Refer to 10 6 1 NOTE When the inverter P C board is replaced check the Jumper wires and cut solder them if necessary 10 TROUBLESHOOTING MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUY GEO9NA MUY GE12NA MUY GE15NA MUY GE18NA 10 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for miswiring 2 Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller then after con firming the horizontal vane is closed turn off the breaker and or disconnect the power plug 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and the electronic control P C board 3 When removing the electrical parts be careful of the residual voltage of smoothing capacitor 4 When removing the electronic control P C board hold the edge of the board with care NOT to appl
6. 2 Liquid 1 4 flared Gas 1 2 8 11 32 WIRING DIAGRAM MUZ GEO9NA MUZ GE12NA 9 WI 101 Oem MC U 1 1 LDU U P CNEL IPM paw x INVERTER P C BOARD qn 133219 Q 160 1 60 93 1 5 I o o o o o OFF NOTES Sep Se OD a al ZH 1 About the indoor side electric wiring refer to the indoor 5 d A A A 6 unit electric wiring diagram T64 RT68 165 G1 RT62 for servicing MF 2 Use copper conductors only For field wiring LEV SYMBOL NAME SYMBOL NAME SYMBOL NAME CT CURRENT TRANSFORMER 152 CMC COIL OUTDOOR HEAT EXCHANGER C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR 0861 0865 DIODE MODULE Ww COMPRESSOR TB2 TERMINAL BLOCK DSA SURGE ABSORBER MF FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F701 F801 F901 FUSE T3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION 1801 TRANSFORMER H DEFROST HEATER OPTION PARTSIJ _RT61 DEFROST THERMISTOR X63 X64 X66 RELAY 1800 INTELLIGENT POWER DEVICE RT62 DISCHARGE TEMP THERMISTOR 2154 REVERSING VALVE COIL IPM 1932 INTE
7. e 4 E TTA aen He 3 Serm as Ee mt mm a f m QC d m Hm mi En digi DON pee Ree td X o g d 5 5 T z LED LEV Jumper wire for Jumper wire E amp Y 2 S connector changing defrost for pre heat om 95 5 EN CN724 setting JS MUZ control setting Front side of unit 22 EBV Er JK 59 SES oo 2 coe 089 95 SZ OF 28 FEO 34 529 LO PBS c Eo oc CLI ZE 05 252 Lo SEO 2 SE 9 z 35 Bee LES Be 296 Og 8 ox Oss Defrost thermistor RT61 MUZ Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Fin temperature thermistor RT64 200 Discharge temperature thermistor RT62 0 Resistance kQ 0 4 14 32 50 68 86 104 322250 BO Bb 104122 140 158 178 194 212 230 248 32 50 68 86 104 122 140 158 176 Temperature F Temperature F Temperature F 38 22222222 MUZ GE18NA MUY GE18NA Bus bar voltage Smoothing Smoothing Smoothing R Vcoil 2 capacitor capacitor capacitor Fuse F701 CN721 Back side of unit DB61 C63 C62 C61 DC 260 325 V T3 15 AL 250 V 208 230
8. Refrigerant circuit Condensing pressure 400 431 376 458 Suction pressure 139 99 117 102 Discharge temperature 164 179 177 184 Condensing temperature 117 122 112 127 Suction temperature 57 31 59 33 Comp shell bottom temp 148 165 164 170 Ref pipe length Refrigerant charge R410A 2 lb 9 oz 3 Ib 7 oz Indoor unit Intake air temperature 80 80 67 67 Discharge air temperature 60 56 57 54 Fan speed High 1 280 1 280 Airflow High 498 Wet 498 Wet Outdoor unit Intake air temperature 95 95 Fan speed Airflow 20 7 5 CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ GEO9NA MUY GEO9NA Correction of Cooling capacity a o o e o o a Input correction factors Capacity correction factors 150 Hz The operational frequency of compressor MUZ GE12NA MUY GE12NA Correction of Cooling capacity 1 5 u 5 8 9 10 8 2 M 5 FEN o 2 oO 150 Hz The operational frequency i of compressor MUZ GE15NA MUY GE15NA Correction of Cooling capacity 2 0 e 8 p 815 2 S 5 510 v o o 2 8 905 5 F 8 8 00 150 Hz The operational of compressor MUZ GE18NA MUY GE18NA Correction of Cooling
9. 103 115 116 Suction temperature 59 39 56 35 Comp shell bottom temp 151 149 158 158 Ref pipe length Refrigerant charge R410A 1 Ib 12 oz 2 lb 9 oz Indoor unit Intake air temperature 80 80 67 67 Discharge air temperature 60 56 58 55 Fan speed High 1 020 1 020 Airflow High 367 Wet 367 Wet Outdoor unit Intake air temperature 95 95 Fan speed Airflow 19 MSZ GE15NA MSY GE15NA MSZ GE15NA MSZ GE18NA MSY GE18NA MSZ GE18NA Cooling Heating Cooling Heating Capacity 14 000 18 000 17 200 21 600 SHF 0 80 0 71 Input 1 080 1 600 1 640 1 900 Rated frequency 55 5 74 0 83 0 84 0 Electrical circuit Indoor unit MSZ GE15NA MSY GE15NA MSZ GE18NA MSY GE18NA Power supply V Phase Hz 208 230 1 60 Input 0 045 0 031 0 043 0 037 Fan motor current 0 50 0 45 0 35 0 32 0 43 0 39 0 40 0 36 Outdoor unit MUZ GE15NA MUY GE15NA MUZ GE15NA MUZ GE18NA MUY GE18NA MUZ GE18NA Power supply V phase Hz 208 230 1 60 Input 1 035 1 569 1 595 1 860 Comp current 4 86 4 40 7 38 6 67 6 97 6 29 8 36 7 55 Fan motor current 0 33 0 30 0 34 0 31 0 80 0 72 0 64 0 59
10. 37 10 6 TEST POINT DIAGRAM AND VOLTAGE 1 Inverter P C board MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUY GEO9NA MUY GE12NA MUY GE15NA Bus bar voltage Smoothing Smoothing Smoothing DB61 capacitor capacitor capacitor Fuse F701 Back side of unit C63 C62 C61 DC 260 325 V T3 15 AL 250 V C AC 208 230 V Fuse F801 250 V 3 15 A R V coil CN721 stoeit SPECT 208 230 s B bu BRIT UO Lem VAC Ey AN B pee Bos MUZ E EH 25 2 ES ef oo T3 15AL250V 3 4 Fuse F901 Ks Eee T3 15 AL 250 V c TUE a JO Be Output to Helen drive Js SESS compressor 552 5 0 208 LDU ES LDU T 230 V LDV 24 11 B LDW TS 4 0 am 12 2 of Ji 2 0 oso SO EO B dr S il O 2 x X s HE Uc Mm d 8 e oel 0 Cf an 0 i EE Erg E BU te DR qi is qs 3 pp E Na E p i
11. 60 5 15 25 35 45 55 65 75 Outdoor ambient temperature PSIG Suction pressure 210 185 160 135 110 85 60 18 5 15 25 35 45 55 65 75 Outdoor ambient temperature 22 27 7 4 STANDARD OPERATION DATA MSZ GEO9NA MSY GEO9NA MSZ GEO9NA MSZ GE12NA MSY GE12NA MSZ GE12NA Cooling Heating Cooling Heating Capacity 9 000 10 900 12 000 14 400 SHF 0 82 0 74 Input 0 660 0 760 0 960 1 170 Rated frequency 59 5 77 5 69 0 77 0 Electrical circuit Indoor unit MSZ GEO9NA MSY GEO9NA MSZ GE12NA MSY GE12NA Power supply V Phase Hz 208 230 1 60 Input 0 022 0 023 0 022 0 023 Fan motor current 0 24 0 22 0 25 0 23 0 24 0 22 0 25 0 23 Outdoor unit MUZ GEO9NA MUY GEO9NA MUZ GEO9NA MUZ GE12NA MUY GE12NA MUZ GE12NA Power supply phase Hz 208 230 1 60 Input 0 638 0 737 0 938 1 147 Comp current 3 32 3 00 3 66 3 31 4 39 3 97 5 41 4 89 Fan motor current 0 27 0 24 0 30 0 27 0 34 0 31 0 31 0 28 Refrigerant circuit Condensing pressure 389 331 389 397 Suction pressure 151 103 133 104 Discharge temperature 154 152 163 162 Condensing temperature 115
12. o Input correction factors a 0 50 100 150 Hz The operational frequency of compressor Correction of Heating total input 1 5 o o 5 5 1 0 52 5 205 4 8 i 0 50 100 150 Hz The operational frequency of compressor 7 6 HOW TO OPERATE FIXED FREQUENCY OPERATION Test run operation ies O RON remote controller 21 Press EMERGENCY OPERATION switch to start COOL or HEAT mode COOL Press once HEAT Press twice Test run operation starts and continues to operate for 30 minutes Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode Indoor fan operates at High speed After 30 minutes test run operation finishes and EMERGENCY OPERATION starts operation frequency of compressor var To cancel test run operation EMERGENCY OPERATION press EMERGENCY OPERATION switch or any button on 8 ACTUATOR CONTROL MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUY GEO9NA MUY GE12NA MUY GE15NA MUY GE18NA 8 1 OUTDOOR FAN MOTOR CONTROL The fan motor turns ON OFF interlocking with the compressor ON The fan motor turns ON 5 seconds before the compressor starts up OFF The fan motor turns OFF 15 seconds after the compressor has stopped running 5 seconds 15 seconds ON 4 05 Compressor OFF ON Outdoor fan motor OFF 8 2 R V COIL CONTROL MUZ OFF R V coil ds ORF me Outdoor fan ON me s
13. 60 FWB Outdoor 47 FDB 43 FWB Heating Indoor 70 FDB 60 FWB Outdoor 17 FDB 15 FWB 3 Ib 7 oz Rated frequency Rated frequency Maximum frequency Test condition 3 4 Indoor air condition F Outdoor air condition F Test i Dry bulb Wet bulb Dry bulb Wet bulb A 2 Cooling Steady State at rated compressor Speed B 2 Cooling Steady State at rated compressor Speed 80 67 95 75 80 67 82 65 SEER 1 Cooling Steady State Cooling at minimum compressor Speed 80 67 82 65 F 1 Cooling Steady State at minimum compressor Speed E V Cooling Steady State at Intermediate compressor Speed 5 H1 2 Heating Steady State at rated compressor Speed H3 2 Heating at rated compressor Speed 0 1 Heating Steady State at minimum compressor Speed H1 1 Heating Steady State at minimum compressor Speed H2 V Heating at Intermediate compressor Speed 5 80 67 67 53 5 80 67 87 69 70 60 47 43 70 60 17 15 HSPF Heating MUZ 70 60 62 70 60 47 70 60 35 3 amp 5 At Intermediate compressor Speed Cooling rated compressor speed minimum compressor speed 3 minimum compressor speed 3 1 OPERATING RANGE 1 POWER SUPPLY Rated voltage Guaranteed voltage V 208 230 V Min 187 208 230 Max 253 Outdoor unit 1 phase 60 Hz 2 OPERATION Intake air temperature F
14. 95 100 105 F 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature Heating MUZ Data is based on the condition of outdoor humidity 7596 Air flow should be set to High speed Data is for heating operation without any frost MUZ GEO9NA PSIG PSIG 370 210 345 185 320 160 295 135 Condensing pressure Suction pressure 270 110 245 85 60 2 205 15 25 35 45 55 65 75 5 15 25 35 45 55 65 75 Outdoor ambient temperature Outdoor ambient temperature MUZ GE12NA PSIG PSIG 460 210 420 185 o 160 e ped 8 380 2 5 135 5 340 5 8 B 110 300 85 260 5 15 25 35 45 55 65 75 eo 15 25 35 45 55 65 75 Outdoor ambient temperature Outdoor ambient temperature 17 MUZ GE15NA PSIG Condensing pressure 440 404 368 332 296 260 75 70 65 3 gom er 54Hz 5 15 25 35 45 55 65 75 F Outdoor ambient temperature MUZ GE18NA PSIG Condensing pressure 500 475 450 425 400 375 350 325 3007 15 25 35 45 55 65 75 Outdoor ambient temperature PSIG Suction pressure 210 185 160 135 110 85
15. Condition Indoor Outdoor WB DB Standard temperature 67 95 Maximum temperature 73 Minimum temperature 57 14 Maximum humidity Standard temperature 60 47 Muz Maximum temperature 67 75 Minimum temperature 60 4 Cooling 4 OUTLINES AND DIMENSIONS MUZ GEO9NA MUZ GE12NA MUZ GE15NA Unit inch MUY GEO9NA MUY GE12NA MUY GE15NA REQUIRED SPACE Basically open 4 inch or more without any obstruction in front 15 3 4 Drain hole 1 5 8 and on both sides of the unit Air in T ele Air in c X Air out 2 3 8 x13 16 Oval hole 7 8 29 32 handle right or rear side Liquid pipe 1 4 flared Gas pipe 3 8 flared GE09 12 1 2 flared GE15 SY z Y LE 11 29 32 6 23 32 L51518 19 11 16 J 31 1 2 2 23 32 N e L e MUZ GE18NA MUY GE18NA Open as a rule 20 inch or more if the front and both sides are open REQUIRED SPACE 20 9 32 11 25 82 4 inch or more 8 inch or more if there are obstacles to both sides Drain 3 holes 21 5 16 Fin Or Dors m 4 3 8 x 13 16 slot 19 11 16 i Open as a rule 33 1 16 3 3 16 gt 20 inch or more if the back 4 25 32 both sides and top are open 33 76 S NS
16. Measure the resistance between the lead wires at 3 points WHT RED lt lt Judgement gt gt Refer to 10 4 o O ern Abnormal short Infinite Abnormal open NOTE Be sure to zero the ohmmeter before measurement Check of compressor operation time lt lt Judgement gt gt eConnect the compressor and activate the inverter Then measure 0 second the time until the inverter stops due to over current lt lt Operation method gt gt 1 second Abnormal Start heating or cooling operation by pressing EMERGENCY Eon failure diseno OPERATION switch on the indoor unit 2 seconds prnpreseorwinding sH n TEST RUN OPERATION Refer to 7 6 Abnormal lt lt Measurement gt gt Stating dete lock out Measure the time from the start of compressor to the stop of Starting defect compressor due to overcurrent Abnormal Poor contact 10 seconds Outdoor P C board defect Disconnected connector Abnormal Refrigerant circuit defect Closed valve 10 minutes F Check of compressor start failure Confirm that 1 4 is normal Electrical circuit check 1 Contact of the compressor connector including CN61 2 Output voltage of inverter P C board and balance of them See 10 5 3 Direct current voltage between DB61 and on the inverter P C board V 4 Voltage between outdoor terminal block 51 52 Does the compressor run for 10 seconds or Check the refrigerant
17. ates 1 time flash 2 5 seconds OFF Frequency drop by current protection Current from power outlet is nearing Max fuse size 3 time flash 2 5 seconds OFF Frequency drop by high pressure protec tion Temperature of indoor coil thermistor exceeds 131 55 C in HEAT mode compressor frequency lowers Frequency drop by defrosting in COOL mode Indoor coil thermistor reads 46 F 8 C or less COOL mode compressor frequency lowers The unit is normal but check the follow ing Check if indoor filters are clogged Check if refrigerant is short Check if indoor outdoor unit air circula tion is short cycled 4 time flash 2 5 seconds OFF Frequency drop by discharge tempera ture protection Temperature of discharge temperature thermistor exceeds 232 F 111 C compressor frequency lowers Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV Refer to 10 5 Check of outdoor thermistors Outdoor unit oper ates 7 time flash 2 5 seconds OFF Low discharge tem perature protection Temperature of discharge temperature thermistor has been 122 F 50 or less for 20 minutes Refer to 10 5 Check of LEV Check refrigerant circuit and refrigerant amount 8 time flash 2 5 seconds OFF PAM protection PAM Pulse Amplitude Modulation The overcurrent flows into IGBT Insulated Gate Bipolar transis tor TR821 or the bu
18. circuit more after it starts Yes Check the stop valve After the compressor is heated with drier does the compressor start x1 No Replace the compressor Yes Heat the compressor with drier for about 20 minutes Do not recover refrigerant gas while heating Compressor start failure Activate pre heat control Refer to 9 2 PRE HEAT CONTROL SETTING Heating part 227 Check of outdoor thermistors Disconnect the connector of thermistor in the outdoor P C board see below table and measure the resistance of thermistor Y Is the resistance of thermistor normal Replace the thermistor except RT64 When RT64 is Refer to 10 6 1 No abnormal replace the inverter P C board Yes Y Reconnect the connector of thermistor Turn ON the power supply and press EMERGENCY OPERATION switch y Does the unit operate for 10 minutes or more showing thermistor abnormality Replace the inverter P C board Yes Y OK Cause is poor contact Thermistor Connector Pin No Defrost MUZ Between CN641 1 and pin2 Discharge temperature Between 641 pin3 and pin4 Fin temperature Between CN642 pin1 and pin2 Inverter P C board Ambient temperature Between CN643 pin1 and pin2 Outdoor heat exchanger temperature Between CN644 pin1 and pin3
19. compressor Check of open phase e With the connector between the compressor and the intelligent power module disconnected activate the inverter and check if the inverter is normal by measuring the voltage balance between the terminals Output voltage is 50 130 V The voltage may differ according to the tester lt lt Operation method Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the indoor unit TEST RUN OPERA TION Refer to 7 6 Measurement point at 3 points BLK U WHT V BLK U RED W WHT V RED W Measure AC voltage between the lead wires at 3 points NOTE 1 Output voltage varies according to power supply voltage 2 Measure the voltage by analog type tester 3 During this check LED of the inverter P C board flashes 9 times Refer to 10 6 1 O Check of compressor Refer to 10 5 Check of compressor winding N Replace the compressor Is the compressor normal pes Refer to 10 5 Check of compressor operation time No Refer to 10 5 Check of compressor start failure Does the compressor operate continuously Yes D Check of compressor winding e Disconnect the connector CN61 between the compressor and intelligent power module and measure the resistance be tween the compressor terminals Measurement point at 3 points BLK WHT BLK RED
20. compressor connector CN61 4 Remove the screws fixing the relay panel Photo 3 5 Remove the inverter assembly Photo 4 6 Remove the screw of the ground wire and screw of the T B support Photo 4 7 Remove the relay panel from the inverter assembly 8 Remove the inverter P C board from the relay panel Removing R V coil MUZ 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors Inverter P C board 721 coil 3 Remove the Photo 5 Removing the discharge temperature thermistor defrost thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following connectors Inverter P C board CN641 Defrost thermistor MUZ and discharge tempera ture thermistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor 3 Pull out the discharge temperature thermistor from its hold er Photo 5 4 Pull out the defrost thermistor from its holder Photo 6 5 Pull out the outdoor heat exchanger temperature thermistor from its holder Photo 6 6 Pull out the ambient temperature thermistor from its holder Photo 3 Screws of the relay panel Photo 4 Inverter assembly Inverter P C board Screw of the T B support Heat sink T B support Screw of the R
21. flash 2 5 seconds OFF Serial signal The communication fails between the indoor and outdoor unit for 3 minutes Refer to 10 5 How to check miswir ing and serial signal error 11 time flash 2 5 seconds OFF Stop valve Closed valve Closed valve is detected by compressor current Check stop valve 14 time flash 2 5 seconds OFF Outdoor unit Other abnormality Outdoor unit is defective Refer to 10 2 2 Flow chart of the de tailed outdoor unit failure mode recall function Outdoor unit stops and re starts 3 minutes later is repeated 2 time flash 2 5 seconds OFF Overcurrent protec tion Large current flows into intelligent power module When overcurrent protection occurs within 10 seconds after compressor starts compressor restarts after 15 seconds Reconnect connector of compressor Refer to 10 5 How to check inverter compressor Check stop valve 3 time flash 2 5 seconds OFF Discharge tempera ture overheat protec tion Temperature of discharge temperature thermistor exceeds 241 116 compressor stops Compressor can restart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV 4 time flash 2 5 seconds OFF Fin temperature P C board temperature thermistor overheat protection Temperature of fin temperature th
22. ia 1 Remove the cabinet and panels Refer to 1 PB support PB support 2 Disconnect the following connectors By T B support lt Inverter P C board gt e a CN721 R V coil MUZ 3 Remove the R V coil Photo 5 Screw of the Relay panel ya wire Hook of the Screw of the PB support PB fixture Photo5 R V coil MUZ Welded parts of 4 way valve OPERATING PROCEDURE PHOTOS 4 Removing the discharge temperature thermistor defrost thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following connectors Inverter P C board CN641 Defrost thermistor MUZ and discharge tempera ture thermistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor 3 Pull out the discharge temperature thermistor from its hold er Photo 8 4 Pull out the defrost thermistor from its holder Photo 6 5 Pull out the outdoor heat exchanger temperature thermistor from its holder Photo 6 6 Pull out the ambient temperature thermistor from its holder Photo 6 Removing outdoor fan motor 1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 and CN932 Fan motor 3 Remove the propeller 4 Remove the screws fixing the fan moto
23. power supply Y No Is there rated voltage between outdoor terminal block S1 and S2 Check the wiring wees Press EMERGENCY OPERATION switch once Y Does the OPERATION INDICATOR lamp light up Confirmation of the power to the indoor unit No Yes E Y Is there any miswiring poor contact or wire Is serial signal error indicated 6 minutes later disconnection of the Correct them No Yes indoor outdoor connect Yes ing wire lt No y X1 Miswiring may damage indoor electronic control P C Y board during the operation Turn OFF the power supply Check once more if the indoor outdoor connecting wire is not miswiring Short circuit outdoor terminal block S2 x3 Be sure to confirm the wiring is correct before the opera tion starts Be sure to check this within 3 minutes after turning ON After 3 minutes LED blinks 6 times Even when the lt 53 x1 inverter P C board or the outdoor electronic control P C Y board is normal LED blinks 6 times after 3 minutes Turn ON the power supply y Is the bus bar voltage of the inverter P C board or the outdoor electronic control P C board normal Refer gt Check of power supply to TEST POINT DIAGRAM AND VOLTAGE in this manual No Refer to 10 5 0 Yes Y Does the LED on the inverter P C board or the outdoor electronic control P C Replace the inverter board or the outdoor board repeat 3 6 second OFF and 0 8 second ON
24. quick blinking x3 No electronic control P C board Lighted ve Tt 2 Be careful of the residual voltage of smoothing lighted capacitor Turn OFF the power supply Remove the short circuit between outdoor terminal Turn ON the power supply ock S2 and S3 Check the wiring If there are any error of the indoor outdoor connecting wire such as the damage of the wire intermediate connection and or poor contact to the terminal block replace the indoor outdoor connecting wire Y Is there rated voltage between indoor terminal block S1 and S2 Confirmation of power voltage No Yes Is there amplitude of 10 to 20 VDC between indoor terminal block S2 and S3 Confirmation of serial signal No Yes A Y equipment turn ON again Switch Turn OFF inverter controlled lighting Turn OFF the power supply and then Press EMERGENCY OPERATION Is there 2 VDC or less between CN10A and JPG GND on the indoor electronic control P C board ve Yes 15 there 2 VDC or less between CN10A and JPG GND Is serial signal error indicated 6 minutes later Reinstall board the indoor electronic control P C 15 there 2 VDC or less between CN10A and JPG GND on the indoor electronic control P C board on Yes either the unit Replace the indoor power P C board and the indoor or the light away fro
25. when the indoor unit is abnormal ON OFF Blinking at 0 5 2 5 second OFF second interval a gt gt r gt I A e i gt gt 9 5 5 CUPS Beeps Repeated cycle x3 Blinking pattern when the outdoor unit is abnormal second OFF 4 3 second ON 1 x Blinking at 0 5 Repeated cycle Blinking at 0 5 2 5 second OFF second interval Beeps Repeated cycle Beeps Blinking at 0 5 second interval Beeps 2 5 second OFF 3 second ON Bed gt gt gt No beep gt a second interval q beep Beeps Repeated cycle Repeated cycle 24 Repeated cycle 2 Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal Confirm if outdoor unit is abnormal according to the following procedures Y Confirm that the remote controller is in the failure mode recall function With the remote controller headed towards the indoor unit press TOO x1 COOL or TOO WARM button to adjust the set temperature to 77 F 25 C Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0 5 seconds X1 Regardless of normal or abnormal condition 2 short beeps are emitted as the signal is received Blinks The outdoor unit is abnormal Beep is emitted No at the same timi
26. 31 1 2 D 11 1 4 H 21 5 8 Weight External finish Munsell 3Y 7 8 1 1 Remote controller Wireless type Control voltage by built in transformer 12 24 Refrigerant piping Not supplied Refrigerant pipe size Min wall thickness Liquid 1 4 0 0315 Gas 3 8 0 0315 Connection method Indoor Flared Outdoor Flared Between the indoor amp outdoor units Height difference 40 Piping length 65 Refrigerant charge R410A NOTE Test conditions are based on ARI 210 240 3 amp 1 Rating conditions x2 ASL Heating Indoor 80 FDB 67 FWB Outdoor 95 FDB 75 FWB Indoor 70 FDB 60 FWB Outdoor 47 FDB 43 FWB Heating Indoor 70 FDB 60 FWB Outdoor 17 FDB 15 FWB Rated frequency Rated frequency Maximum frequency Outdoor unit model MUZ GE15NA MUY GE15NA MUZ GE18NA MUY GE18NA Capacity Rated Minimum Maximum Cooling 1 14 000 3 100 18 200 14 000 3 100 18 200 17 200 3 700 18 700 17 200 3 700 18 700 Heating 47 1 18 000 4 800 20 200 21 600 3 500 25 200 Capacity Heating 17 2 15 900 17 200 Power consumption Rated Minimum Maximum Cooling 1 1 080 160 2 000 1 080 160 2 000 1 640 240 2 070 1 640 240 2 070 Heating 47 41 1 600 270 2 010 1
27. 900 230 2 680 Power consumption Heating 17 2 1 950 2 080 EER 1 SEER 3 Cooling 13 0 21 0 10 5 19 2 10 5 19 2 Heating 10 0 13 0 21 0 10 0 Heating 441 3 30 3 33 V phase Hz 208 230 1 60 Max fuse size time delay A 1 5 Min circuit ampacity A Fan motor F L A Compressor SNB130FQBH R L A 6 8 10 0 L R A 8 5 12 5 Refrigeration oil cc Model 450 N EO22 Refrigerant control Linear expansion valve Sound level 1 Cooling dB A 49 54 Heating dB A 56 Revers cycle W 33 1 16 D 13 H 33 7 16 119 External finish Munsell 3Y 7 8 1 1 Remote controller Wireless type Control voltage by built in transformer 12 24 Refrigerant piping Not su pplied Refrigerant pipe size Min wall thickness Liquid 1 4 0 0315 Gas 1 2 0 0315 Connection method Indoor Flared Outdoor Flared Between the indoor amp outdoor units Height difference 40 50 Piping length 65 100 Refrigerant charge R410A NOTE Test conditions are based on ARI 210 240 3 amp 1 Rating conditions rooting gt T Heating 2 9 oz Indoor 80 FDB 67 FWB Outdoor 95 FDB 75 FWB Indoor 70 FDB
28. About the indoor side electric From INDOOR UNIT wiring refer to the indoor 55 3p e te e tt 6 53 CONNECTING WIRES unit electric wiring diagram T64 RTB8 61 RTG Shen 0C12 24V for servicing MF 2 Use copper conductors only Sie mE For field wiring LEV BRN SYMBOL NAME SYMBOL NAME SYMBOL NAME 1 phase GONZ CT CURRENT TRANSFORMER L62 CMC COIL RTE QUTDOOR HEAT EXCHANGER C61 C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR 0861 0865 DIODE MODULE M COMPRESSOR TB2 TERMINAL BLOCK DSA SURGE ABSORBER MF FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F701 F801 F901 FUSE T3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION T801 TRANSFORMER H DEFROST HEATER OPT ION PARTS RT61 DEFROST THERMISTOR X63 X64 X66 RELAY 16802 INTELLIGENT POWER DEVICE RT62 DISCHARGE TEMP THERMISTOR 2184 REVERSING VALVE COIL IPM 1 932 INTELLIGENT POWER MODULE RT64 FIN TEMP THERMISTOR 26H HEATER PROTECTORIOPTION PARTS L61 REACTOR RT65 AMBIENT TEMP THERMISTOR 1 1 1 1 3p TR821 Em 9 WHT TOW NECI CEE 2 CIRCUIT 1 MCU Uc Lou E oven CNEL IPM 208 230V 16 7 phase Gonz i INVERTER P C BOARD cneas cneas o WRR gir te eei eir Ip ee ooo OM CONNECTING WIRE NOTES 7 12 1 About the indoor side electric m Ed From INDOOR UNIT wiring refer to the indoor 58 t t t t 6 93 CONNECTING WIRES unit elect
29. BI TB TERMINAL BLOCK DSA SURGE ABSORBER MF FAN MOTOR 821 SWITCHING POWER TRANSISTOR F801 F901 FUSE 3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION T801 TRANSFORMER HC930 IPM INTELLIGENT POWER MODULE RTE2 DISCHARGE TEMP THERMISTOR X64 RELAY 12807 INTELLIGENT POWER DEVICE RT64 FIN TEMP THERMISTOR 161 REACTOR RT65 AMBIENT TEMP THERMISTOR Loewe eater GROUND INDOOR UNIT Tg CONNECTING WIRES 1 24 BRN S53p V Ser TO INR UNT Sips CONNECTING WIRES 208 230V 1 phase 60Hz 20 em em em FROM INDOOR UNIT CONNECTING WIRE 6 REFRIGERANT SYSTEM DIAGRAM MUZ GEO9NA MUY GEO9NA Unit inch Refrigerant pipe 03 8 5 with heat insulator Way valve lt i Outdoor heat exchanger 7 Stop Ta temperature with service Y Muffler Outdoor thermistor Flared connection Discharge heat R ee exchanger ll thermistor RT62 i Service port P Compressor Rent Service port m IO Sto V RT65 Defrost thermistor RT61 MUZ di Strainer Capillary tube 100 Flared connection O D 0 118 x I D 0 079 x 9 7 16 LEV 93 0 x 2 0 240 R V MUZ z heating ON gt lt 000 gt lt cooling OFF Stop valve with strainar Refrigerant pipe 01 4 Refrigerant flow in cooling with heat insulator gt Refrigerant flow in heating MUZ MUZ GE12
30. ION SELECT button and TOO COOL button on the press RESET button And release the other two buttons after all LCD in operation display section of the remote controller is displayed after 3 seconds MITSUBISHI ELECTRIC Y Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit X1 Y Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0 5 seconds Blinks Either indoor or outdoor unit is abnormal Beep is emitted at the same timing as the blinking of the upper lamp of OPERATION NDICATOR lamp X2 Judgment of indoor outdoor abnormality Y Yes Blinks Before blinking does the upper lamp of OPERATION INDICA TOR lamp stay ON for 3 seconds Stays ON for 3 seconds wit The outdoor un hout beep it is abnormal No Y 3X1 Regardless of normal or abnormal condition a short beep is emitted once the signal is received Indoor unit is normal But the outdoor unit might be abnormal because there are some abnor malities that can not be recalled with this way Confirm if outdoor unit is abnormal according to the detailed outdoor unit failure mode recall function Refer to 10 2 2 No OFF Yes The indoor unit is abnormal failure mode table Refer to indoor Check the blinking pattern and con
31. LLIGENT POWER MODULE R764 FIN TEMP THERMISTOR 26H HEATER PROTECTORIOPTION PARTS L61 REACTOR 1765 AMBIENT TEMP THERMISTOR L61 1 RED 2 2 gk ak ve m E 1 Cap d i4 2 OPTION PARTS Om Tp CIRCUIT GROUND L2 E EL 208 230V LL pese phase 60Hz Fron INDOOR UNIT Oo CONNECTING WIRE 7 TB Fron INDOOR UNIT S3p gt WIRES TO INDOOR UNIT CONNECTING WIRES 208 230 1 phase 60Hz W gp Ser pep OV wr WET LDW p m ira ke cNg31 mm MCU 1 iou 0 P Ip o o o Of LAT POWER SUPPLY CNG IPM d LM ps phase 1 1 INVERTER BOARD 3 CN642 CN644 N643 CN641 CN724 uiu CN332 99 9 T 1g 9 19 o Ip 9 o 9 9 Off 3 EEEE l 1 About the indoor side electric 2 2 2 2 From INDOOR UNIT wiring refer to the indoor ys 3 Jt d d d 53 CONNECTING WIRES unit electric wiring diagram T64 RT6B 55 RTG 0012 00 for servicing MF 51 TO INDOOR UNIT 2 Use copper conductors only gt For field wiring LEV E M t NINES SYMBOL NAME SYMBOL NAME SYMBOL NAME T mast 60 CT CURRENT
32. MF FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F701 FOOL F901 FUSE T3 1541250 PTC64 PTC6S CIRCUIT PROTECTION T801 TRANSF RMER H DEFROST HEATER OPTION PARTS RT61 DEFROST THERMISTOR X63 X64 X66 RELAY HC930 IPM INTELLIGENT POWER MODULE RT62 DISCHARGE TEMP THERMISTOR 2154 REVERSING VALVE COIL 10800 INTELLIGENT POWER DEVICE FIN TEMP THERMISTOR 26H HEATER PROTECTOR OPTION PARTS L61 REACTOR RT65 AMBIENT TEMP THERMISTOR ORN ABl YLW F901 VERT ER P C BOARD 2 oke BLK gt BLK Bl LK 28 J Dai Dec B zs 12774 OPTION PARTS m TL T phase 60Hz Llp CIRCUIT BREAKER 4 a GROUND TR T wrs BE 52 i aul Ser m won wir GIL p CONNECTING WRES SW N 1 phase So HM l INDOOR UNIT CONNECTING WIRE Bk m TL 1 phase GOHZ 10 CN644 N643 CN641 CN724 1 5 i IE LE B ml U did amp RT68 T65 RT62 LEV SYMBOL NAME SYMBOL NAME SYMBOL NAME CT CURRENT TRANSFORMER 182 CMC COIL RT68 OUTDOOR HEAT EXCHANGER C61 C62 53 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR 0861 DB65 DIODE MODULE M COMPRESSOR T
33. MITSUBISHI ELECTRIC SPLIT TYPE AIR CONDITIONERS OUTDOOR UNIT SERVICE MANUAL Models MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUY GEO9NA MUY GE12NA MUY GE15NA MUY GE18NA Changes for the Better HFC No OBH549 utilized R410A Indoor unit service manual MSZ GE NA 5 Series OBH548 CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND 3 3SSPECIFICATIONE tn 4 4 OUTLINES AND DIMENSIONS 7 5 WIRING DIAGRAM 8 6 REFRIGERANT SYSTEM DIAGRAM 11 TED ATA LE 9 ES 13 8 ACTUATOR 22 9 SERVICE FUNCTIONS 23 10 23 11 DISASSEMBLY INSTRUCTIONS 40 PARTS CATALOG OBB549 NOTE RoHS compliant products have G mark on the spec name plate SUIT 1 TECHNICAL CHANGES MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUY GEO9NA MUY GE12NA MUY GE15NA MUY GE18NA 1 New model 2 PART NAMES AND FUNCTIONS MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUY GEO9NA MUY GE12NA MUY GE15NA Air inlet back and side Air outlet Drain outlet MUZ GE18NA MUY GE18NA Air inlet back and side
34. NA 70 0 91 1 01 1 06 65 0 87 0 98 1 03 75 0 95 1 06 1 12 MUZ GE18NA 70 0 93 1 04 1 09 65 0 90 1 01 1 06 NOTE 1 IDB Intake air dry bulb temperature TC Total Capacity x10 Btu h TPC Total Power Consumption kW 2 Above data is for heating operation without any frost How to operate with fixed operational frequency of the compressor 1 Press the EMERGENCY OPERATION switch on the front of the indoor unit and select either EMERGENCY COOL mode or EMERGENCY HEAT mode before starting to operate the air conditioner The compressor starts with operational frequency The fan speed of the indoor unit is High This operation continues for 30 minutes In order to release this operation press the EMERGENCY OPERATION switch twice or once or press any button on the remote controller AUN 7 2 PERFORMANCE CURVE Cooling MUZ GE09NA MUZ GE12NA MUZ GE15NA SHF at rating condition 0 76 SHF at rating condition 0 73 SHF at rating condition 0 80 g g 1 9 1 Airflow 307 Airflow 350 Airflow 498 18 In 13 15 doo 17 Indoor int rs 12 door Make air NEL he aj mu 16 SE B ot e ot gs temperar gs 19 em eratis 25 15 861 e F q
35. NA MUZ GE15NA MUY GE12NA MUY GE15NA Unit inch Refrigerant pipe 03 8 GE12NA Refrigerant pipe 21 2 GE15NA 4 way valve with heat insulator an IT Te Outdoor heat mones exchanger NS port X Y SENTIS Discharge Muffler Froger ared connection temperature exchanger i thermistor 5 ae RT62 i ervice port t compressor Tu UE Service a Defrost nps m thermistor RT65 I Flared connection N Capillary tube 0 118 x 1 0 0 079 x 9 7 16 LEV 03 0 x 92 0 240 gt lt 5 04 000 Stop valve Refrigerant pipe 01 4 SUR A with heat insulator 11 s RT61 Capillary tube O D 0 118 1 0 0 071 x 23 5 8 23 0 x 01 8 x 600 3 x2 R V 02 heating ON cooling OFF gt Refrigerant flow in cooling L3 gt Refriaerant flow in heatina MUZ MUZ GE18NA MUY GE18NA Unit inch Muffler Refrigerant pipe 01 2 with heat insulator Stop valve with service port Flared connection Discharge i temperature Defrost NEA u thermistor thermistor pe 4 RT61 thermistor Service port RT65 Compressor Outdoor heat exchanger temperature thermistor Flared connection r LEV Strainer Receiver R V coil MUZ heating ON gt Stop valve Capillary tube cooling OFE with strainar O D 0 142 x I D 0 094 Refrigerant pipe 21 4 x 1 31 32 gt Refrigera
36. TRANSFORMER 152 CMC COIL RTGB OUTDOOR HEAT EXCHANGER C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR 0861 0865 DIODE MODULE MC COMPRESSOR TB1 2 ERMINAL BLOCK DSA SURGE ABSORBER MF FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F801 F901 FUSE T3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION T801 TRANSFORMER 1 802 INTELLIGENT POWER DEVICE RT62 DISCHARGE TEMP THERMISTOR X64 RELAY IPM 1 932 INTELLIGENT POWER MODULE RT64 FIN TEMP THERMISTOR L61 REACTOR RT65 AMBIENT TEMP THERMISTOR MUZ G E15NA PARTS 1 W gp eT wr TOW Oo Da LDV tat N931 D om RUIT l GROUND MC U m ri 99 9 9 9b Am PONER SUPPLY Le 208 230 5 L1 p s phase 60Hz i INVERTER P C BOARD cneas cneas MA cc LL Mit 99 67 Io ooo To CONNECTING WIRE NOTES E 7 182 1
37. ae go 14 Indoor 59 9 z 71 s 13 ke air we 67 eX 10 er EX 12 erature 67 63 9 11 63 o o o ee 71 12 13 rature Y 71 5 07 Sait WE tenpe 67 5 11 n V 3 13 9 5s intak 5 19 AS ar N 67 Se 14 1 8 8 y wwe 63 8 EZ 06 5 09 909 51 0 we GD 6 7 29 SM emper 5 09 alr we o5 5 07 door i S E o o 65 85 105 115 e 65 85 105 115 I 65 8 105 115 Outdoor intake air DB temperature F Outdoor intake air DB temperature F Outdoor intake air DB temperature F 14 MUZ GE18NA MUY GE18NA SHF at rating condition 0 71 Airflow 498 22 21 20 BL S 1 oa 17 Indoo 82916 8 air we 71 SX perat cs 67 14 2 63 8 m 219 71 5 18 87 es 55 17 52 1 6 en 1 5 ature 8 we emp 14 mieke B 13 ndo 65 75 85 95 105 115 Outdoor intake air DB temperature F Heating MUZ MUZ GEO9NA Total capacity 103 Btu h Total power consumption kW 15 14 13 12 11 1 0 8 0 6 0 4 Airflow 413 65 70 la 75 d eem pe 29 uu ger x 75 70 65 ee erature ait pp ene el ndoof 15 25 35 45 55 65 70 Outdoor intake air WB temperature MUZ GE12NA Total capacity X102 B
38. capacity o a Capacity correction factors EE Input correction factors 150 Hz 1 5 0 5 2 0 0 5 1 5 0 5 Correction of Cooling total input Capacity correction factors 50 Hz Correction of Cooling total input 100 150 Hz Correction of Cooling total input 100 150 Hz Correction of Cooling total input 100 150 Hz Capacity correction factors Capacity correction factors is Capacity correction factors m rd a o a o 0 5 0 5 MUZ GEO9NA Correction of Heating capacity 0 50 100 MUZ GE12NA Correction of Heating capacity 0 100 MUZ GE15NA Correction of Heating capacity 50 100 MUZ GE18NA Correction of Heating capacity E 100 1 150 2 The operational of compressor The operational frequency of compressor 150 Hz The beralional frequency of compressor The operational frequency of compressor 150 Hz The operational frequency of compressor The operational frequency of compressor 150 Hz The operational frequency of compressor The operational frequency of compressor The frequency of compressor Correction of Heating total input Input correction factors 0 50 The operational frequency of compressor 100 150 Hz Correction of Heating total input 5 o Input correction factors e a 0 50 100 150 Hz The operational frequency of compressor Correction of Heating total input 5
39. e F Model i 85 95 105 WEE SHC TPC TC SHC TPC TC SHC 71 7 1 064 97 66 0 69 9 0 62 67 8 0 0 61 90 74 0 66 84 69 63 8 7 0 58 8 5 8 1 0 63 7 7 7 3 71 8 3 0 94 7 8 1 01 7 3 67 9 6 0 89 8 9 0 96 8 3 63 10 6 0 85 9 9 0 92 9 0 71 10 7 1 05 10 0 1 13 9 3 67 12 1 1 00 11 2 1 08 10 4 63 13 2 0 96 12 3 1 03 11 2 71 11 4 1 60 10 7 1 72 9 9 67 13 2 1 52 12 2 1 64 11 4 63 14 7 1 45 13 6 1 57 12 4 NOTE 1 IWB Intake air wet bulb temperature TC Total Capacity x10 Btu h SHC Sensible Heat Capacity x10 Btu h TPC Total Power Consumption kW 2 SHC is based on 80 F of indoor Intake air DB temperature MUZ GEO9NA MUY GEO9NA MUZ GE12NA MUY GE12NA MUZ GE15NA MUY GE15NA MUZ GE18NA MUY GE18NA 13 2 COOLING CAPACITY CORRECTIONS Refrigerant piping length one way ft 25 std 40 MUZ GEO9NA MUY GEO9NA MUZ GE12NA MUY GE12NA MUZ GE15NA MUY GE15NA MUZ GE18NA MUY GE18NA 3 HEATING CAPACITY MUZ Indoor air Outdoor intake air WB temperature F 25 35 43 IDE TC TPC TC TPC TC TPC 75 7 9 0 67 94 0 74 0 78 MUZ GE09NA 70 8 2 0 65 96 0 72 0 76 65 8 6 0 63 0 70 0 74 75 i 1 02 1 14 1 20 MUZ GE12NA 70 E 1 00 1 11 1 17 65 4 0 97 1 08 1 14 75 0 93 1 03 1 09 MUZ GE15
40. e e or o or 5 5 Front side of unit EUN 9 EC 55 92 59 5 55 8 amp 5 DES 35 lt Be cz gE oz ws gt LOA 5 OS amp os oc co 2 O lt oO 9 E EE LEO 2322 OEL B Se 80 TE 5 5 556 SES 85 585 28 Bs 5 500 r5 9505 EOA o GES BE 55 9 5 n4 52 geo lt OY 226 Sc gt ef ET SEE ASZ 5 5 5 ose im a 5 5 5 Defrost thermistor RT61 MUZ Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Fin temperature thermistor RT64 200 Discharge temperature thermistor RT62 0 Resistance kQ Resistance kQ REESE ama EEE EN EEE a 0 0 mm 0 4 14 32 50 68 86 104 42220 190 0 1 104 1227040198 1165194212 207240 32 50 68 86 104 122 140 158 176 Temperature F Temperature F Temperature F 39 11 DISASSEMBLY INSTRUCTIONS Terminal with locking mechanism Detaching points The terminal which has the locking mechanism can be detached as shown below There are two types refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the s
41. e of outdoor fan motor normal Refer to 10 4 Yes Replace the inverter P C board MUZ GE18NA MUY GE18NA Check the connection between the connector CN931 and CN932 Y Is the resistance between each ter No Replace the outdoor fan motor minal of outdoor fan motor normal Refer to 10 4 No Yes Y Disconnect CN932 from the inverter P C board and turn on the power supply Rotate the outdoor fan motor manually and measure the voltage of CN931 Between 1 and 5 Between 2 and 5 Between 3 and 5 Y Does the voltage between each terminal become 5 and 0 P Fixed to either 5 or 0 VDC No VDC repeatedly Yes Y Replace the outdoor fan motor No Does the outdoor fan motor rotate smoothly vos Replace the inverter P C board 32 J Check of power supply Disconnect the connector CN61 between compressor and intelligent power module Turn ON power supply and press EMERGENCY OPERATION switch Rectify indoor outdoor connecting wire Yes Does The upper lamp of Is there voltage 208 230 VAC Replace the indoor OPERATION INDICATOR lamp on No between the indoor terminal No electronic control P C the indoor unit light up block 51 and 52 board Wes Is there bus bar voltage 260 325 VDC between DB61 and DB61 ens DES RS Replace the inverter on the inve
42. elay panel ground wire Photo 5 R V coil MUZ Discharge temperature thermistor OPERATING PROCEDURE PHOTOS 5 Removing outdoor fan motor Photo 6 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 CN932 Fan motor 3 Remove the propeller nut Photo 7 4 Remove the propeller Photo 7 5 Remove the screws fixing the fan motor Photo 7 6 Remove the fan motor Outdoor heat exchanger tempera ture thermistor Removing the compressor and 4 way valve 1 Remove the cabinet and panels Refer to 1 2 Remove the inverter assembly Refer to 2 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG Defrost thermistor Photo 7 4 Detach the welded part of the suction and the discharge pipe connected with compressor 5 Remove the nuts of compressor legs 6 Remove the compressor 7 Detach the welded part of pipes connected with 4 way valve Photo 8 Propeller Photo 8 Welded parts of 4 way valve 11 2 MUZ GE18NA MUY GE18NA NOTE Turn OFF power supply before disassembling OPERATING PROCEDURE PHOTOS 1 Removing the cabinet Photo 1 1 Remove the screws of the service panel Screw of the top panel Screws of the cabinet 2 Remove the screws of the top panel x 3 Remove the screw of the valve cover 4 Remove the service panel 5 Remove the top
43. ement hold the Discharge temperature thermistor with your hands to warm it up thermistor RT62 Refer to 10 6 Test point diagram and voltage 1 Inverter P C board for the chart of thermistor Measure the resistance between terminals using a tester Temperature 14 104 F 10 40 C WHT RED BLK W U Normal Compressor GEO9 GE12 GE15 18 1 36 1 93 1 52 2 17 0 78 1 11 V Measure the resistance between lead wires using a tester Temperature 14 104 F 10 40 C WHT RED BLK W U Color of lead wire Normal Q Outdoor fan motor GE09 12 GE15 GE18 RED BLK BLK WHT 28 40 11 16 V WHT RED Measure the resistance using a tester Temperature 14 104 F 10 40 C R V 2154 Normal MUZ 0 97 1 38 Measure the resistance using a tester Temperature 14 104 F 10 40 C Color of lead wire Normal Q Expansion valve coil WHT RED LEV RED ORN YLW BRN BRN BLU 37 54 28 10 5 TROUBLESHOOTING FLOW How to check inverter compressor Disconnect the connector CN61 between em and the intelligent power module Y Check the voltage between terminals 1777 See 10 5 Check of open phase Y Are the voltages balanced No Replace the inverter P C board Yes Check the compressor eM See 10 5 Check of
44. ermistor on the heat sink ex ceeds 167 176 F 75 80 or temperature of P C board tem perature thermistor on the inverter P C board exceeds 158 167 F 70 75 C around outdoor unit Check outdoor unit air passage Refer to 10 5 0 Check of outdoor fan motor 5 time flash 2 5 seconds OFF High pressure pro tection MUZ Temperature of indoor coil thermistor exceeds 158 F 70 C in HEAT mode Temperature of outdoor heat exchanger temperature thermistor exceeds 158 F 70 C in COOL mode Check refrigerant circuit and refrigerant amount Check stop valve 8 time flash 2 5 seconds OFF Compressor syn chronous abnormal ity The waveform of compressor current is distorted Reconnect connector of compressor Refer to 10 5 How to check inverter compressor 10 time flash 2 5 seconds OFF Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan start up Refer to 10 5 D Check of outdoor fan motor Refer to 10 5 Check of inverter P C board 12 time flash 2 5 seconds OFF Each phase current of compressor Each phase current of compressor cannot be detected normally Refer to 10 5 How to check inverter compressor 13 time flash 2 5 seconds OFF DC voltage DC voltage of inverter cannot be detected normally Refer to 10 5 How to check inverter compressor Outdoor unit oper
45. f LEV 2 Pin Pin gt 3 Pin amp PinD the inverter P C coil have the characteristics Yes Refer to 10 4 4 Pin PinD No Is there about 3 5 VAC between each NOTE Measure the voltage by an analog tester Replace the LEV coil Yes Replace the expansion valve NOTE After check of LEV do the undermentioned operations 1 Turn OFF the power supply and turn ON it again 2 Press RESET button on the remote controller 34 D Check of inverter P C board Check the outdoor fan motor Refer to 10 5 0 y Is the fuse F901 blown on the in verter P C board Yes No Y Check the connection of the connectors CN931 CN932 of the outdoor fan motor If the connection is poor make it correct Operate the outdoor unit by starting EMERGENCY OPERATION Check the LED indication on the in verter P C board Does the LED flash 10 times Yes 10 time flash No Check the remedy following LED indication Refer to 10 3 Replace the inverter P C board lt 35 How to check miswiring and serial signal error Turn OFF the power supply b Y Is there rated voltage in the power supply No Check the power supply Y Yes Turn ON the
46. firm the abnormal point with the indoor unit unit service manual Make sure to check at least two consecutive blinking cycles X2 The outdoor unit is abnormal Check the blinking pattern and confirm the abnormal point with the outdoor unit failure mode table Refer to 10 2 3 Make sure to check at least two consecutive blinking cycles 3 Releasing he failure mode recall function y Turn OFF the power supply and turi Press RESET button of the remote Release the failure mode recall function by the following procedures n it ON again controller Y Repair the d efective parts Deleting the memorized abnormal condition After repairing the unit recall the function mentioned above Press OPERATE STOP ON OF failure mode again according to Set with the remote controller headed towards the indoor unit Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function mentioned above ing up the failure mode recall F button of the remote controller the set temperature is displayed NOTE 1 Make sure to release the failure mode recall function once it is set up otherwise the unit cannot operate properly 2 If the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized X2 Blinking pattern
47. he intelligent power module IPM The compressor winding shorts out Reconnect compressor connector Refer to 10 5 How to check inverter compressor 14 time flash Stop valve Closed valve 14 time flash 2 5 seconds OFF Closed valve is detected by compressor current Check stop valve NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 10 3 26 10 3 TROUBLESHOOTING CHECK TABLE Symptom LED indication Abnormal point Condition Condition Remedy Outdoor unit does not oper ate 1 time flash every 2 5 seconds Outdoor power sys tem Overcurrent protection stop is continuously performed 3 times within 1 minute after the compressor gets started or failure of re start of compressor has repeated 24 times Reconnect connector of compressor Refer to 10 5 How to check inverter compressor Check stop valve Outdoor thermistors Discharge temperature thermistor fin temperature thermistor de frost thermistor outdoor heat exchanger temperature thermistor P C board temperature thermistor or ambient temperature therm istor shorts or opens during compressor running Refer to 10 5 Check of outdoor thermistors Outdoor control sys tem Nonvolatile memory data cannot be read properly POWER lamp of the indoor unit lights up or flashes 7 times Replace inverter P C board 6 time
48. igh speed MUZ GEO9NA MUY GEO9NA PSIG 440 NOOO Cconoo 400 360 Condensing pressure 320 SS 28068 70 75 80 85 90 95 Outdoor ambient temperature 100 105 F MUZ GE12NA MUY GE12NA PSIG 420 86 o 380 2 9 o 2 340 5 we lt c exo we 9 300 9 99 eo 60 6870 75 80 85 90 95 Outdoor ambient temperature 100 105 F MUZ GE15NA MUY GE15NA PSIG 440 400 360 Condensing pressure 320 280 6870 75 80 85 90 95 Outdoor ambient temperature 100 105 F PSIG 200 Indoor DB temperature 180 Suction pressure i 140 120 6870 75 80 85 90 95 100 105 Outdoor ambient temperature PSIG 190 170 2 9 amp 150 9 5 130 110 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature PSIG 200 86 180 F S Indoor DB temperature 8 75 2 160 5 70 5 140 120 6870 16 75 80 85 90 95 100 Outdoor ambient temperature 105 F MUZ GE18NA MUY GE18NA PSIG PSIG 430 160 390 145 350 130 Condensing pressure Suction pressure 310 115 voe 270 100 6870 75 80 85 90
49. leeve Hold the sleeve and Pull the terminal while pull out the terminal pushing the locking slowly lever Connector 11 1 MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUY GEO9NA MUY GE12NA MUY GE15NA NOTE Turn OFF power supply before disassembling OPERATING PROCEDURE PHOTOS 1 Removing the cabinet Photo 1 1 Remove the screw fixing the service panel 2 Pull down the service panel and remove it Screws Screw of the 3 Remove the screws fixing the conduit cover of the top cabinet Screws of 4 Remove the conduit cover panel the top panel 5 Disconnect the power supply wire and indoor outdoor connecting wire 6 Remove the screws fixing the top panel 7 Remove the top panel 8 Remove the screws fixing the cabinet 9 Remove the cabinet 10 Remove the screws fixing the back panel 11 Remove the back panel Photo 2 Screw of the conduit cover Screws of Service the cabinet panel Conduit cover 2 Conduit plate OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly inverter P C board 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following connectors Inverter P C board 721 coil MUZ CN931 CN932 Fan motor CN641 Defrost thermistor MUZ and discharge tempera ture thermistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor CN724 LEV 3 Remove the
50. m each other Attach a filter on remote control receiv terminal P C board Replace the indoor elec tronic control P C board Yes No ing section of the indoor unit 36 NE N Electromagnetic noise enters into TV sets or radios Is the unit grounded No Ground the unit Yes Is the distance between the antennas and the indoor unit within 9 91 ft or is the distance between the antennas and Yes the outdoor unit within 9 91 ft No Extend the distance between the antennas and the indoor unit and or the antennas and the outdoor unit sets or radios and the outdoor unit radios and the outdoor unit ft oris the distance between the TV radios and the indoor unit or the TV sets or es within 9 91 ft No Are the antennas damaged Is the coaxial cable damaged Replace or repair the antenna Is there any poor contact in the anten Yes Replace or repair the coaxial cable na wiring la Is the indoor outdoor connecting wire Extend the distance between the indoor outdoor of the air conditioner and the wiring of connecting wire of the air conditioner and the wir the antennas close Yes ing of the antennas Is the distance between the TV sets or radios and the indoor unit within 3 28 Extend the distance between the TV sets and or Even if all of the above conditions are fulfilled the electromagne
51. ng as the blinking of the upper OFF lamp of OPERATION INDICATOR lamp X2 Yes Blinks The outdoor unit is abnormal Check the blinking pattern and confirm the abnormal point with the out door unit failure mode table 10 2 3 Make sure to check at least two consecutive blinking cycles 2 Releasing the failure mode recall function Y Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller Y Repair the defective parts Deleting the memorized abnormal condition The outdoor unit is normal Release the failure mode recall function accord ing to the left mentioned procedure CD After repairing the unit recall the failure mode again according to Setting up the failure mode recall function 10 2 1 Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 9 Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted 4 Release the failure mode recall function according to Releasing the failure mode recall function men tioned above NOTE 1 Make sure to release the failure mode recall function once it is set up otherwise the unit cannot operate properly 2 If the abnormal condition is not deleted from the memory the last abno
52. nt flow in cooling with heat insulator 93 6 02 4 50 Refrigerant flow in heating MUZ MAX REFRIGERANT PIPING LENGTH and MAX HEIGHT DIFFERENCE Refrigerant piping ft Piping size O D in Model Max Length Max difference Ga Liquid MUZ GE09 12 15NA 65 40 3 8 GE09 12 MUY GE09 12 15NA 1 2 GE15 114 MUZ GE18NA 50 112 MUY GE18NA Indoor unit Max Height difference B Max Length A Outdoor unit 12 _ ADDITIONAL REFRIGERANT CHARGE R410A oz Refrigerant piping exceeding 25 ft requires additional refrigerant charge according to the calculation Outdoor unit Refrigerant piping length one way ft precharged 30 40 50 60 1 Ib 12 oz MUY GEO9NA MUZ GE12NA MUY GE12NA MUZ GE15NA MUY GE15NA Calculation X oz 1 62 5 oz ft x Refrigerant piping length ft 25 Outdoor unit Refrigerant piping length one way ft precharged 40 50 60 70 80 7 oz 3 24 5 40 7 56 9 72 11 88 MUY GE18NA Calculation X oz 1 08 5 oz ft x Refrigerant piping length ft 25 NOTE Refrigerant piping exceeding 25 ft requires additional refrigerant charge according to the calculation 7 DATA 7 1 PERFORMANCE DATA 1 COOLING CAPACITY MUZ GE09NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUY GEO9NA MUY GE12VA MUY GE15VA MUY GE18VA Indoor air Outdoor intake air DB temperatur
53. panel 6 Remove the valve cover 7 Disconnect the power supply and indoor outdoor connect ing wire 8 Remove the screws of the cabinet 9 Remove the cabinet 10 Remove the screws of the back panel 11 Remove the back panel Ii Mw PScrews of the cabinet Photo 2 Screw of the top panel Screws ofthe cabinet Screw of the service panel Screw of the valve cover Screws of the back panel OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly inverter P C board Photo 3 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following con nectors Inverter P C board CN721 R V coil MUZ CN931 CN932 Fan motor CN641 Defrost thermistor MUZ and discharge temperature thermistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor CN724 LEV 3 Remove the compressor connector CN61 4 Remove the screws fixing the relay panel Photo 3 5 Remove the inverter assembly Photo 4 6 Remove the screw of the ground wire and screw of the T B support Photo 4 7 Remove the screw of the PB fixture 8 Remove the relay panel from the PB support 9 Remove the inverter P C board from the inverter assembly Screws of the relay panel Photo 4 Inverter assembly T Ro 3 Removing R V coil Hook of the eae
54. r 5 Remove the fan motor Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 5 Detach the welded part of the suction and the discharge pipe connected with compressor 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the welded part of 4 way valve and pipe Photo 5 Photo 6 Outdoor heat exchanger tempera ture thermistor Ambient tem perature thermistor Defrost thermistor MUZ Photo 7 Screws of the outdoor fan motor Photo 8 Welded part of the discharge pipe Discharge temperature thermistor Welded part of the suction pipe 46 47 SUM a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2009 MITSUBISHI ELECTRIC CO LTD Distributed in Jul 2009 No OBH 549 5 New publication effective Jul 2009 Made in Japan Specifications subject to change without notice
55. r on the inverter P C board exceeds 158 167 F 70 75 Check around outdoor unit Check outdoor unit air passage Refer to 10 5 0 of outdoor fan motor 8 time flash 2 5 seconds OFF Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan start up Refer to 10 5 D Check of outdoor fan motor Refer to 10 5 D Check of inverter P C board 9 time flash 2 5 seconds OFF Nonvolatile memory data 5 time flash 2 5 seconds OFF Nonvolatile memory data cannot be read properly Replace the inverter P C board 10 time flash 2 5 seconds OFF Discharge temperature Temperature of discharge temperature thermistor has been 122 F 50 C less for 20 minutes Refer to 10 5 Check of LEV Check refrigerant circuit and refrigerant amount 11 time flash 2 5 seconds OFF DC voltage 8 time flash 2 5 seconds OFF DC voltage of inverter cannot be detected normally Each phase current of compressor 9 time flash 2 5 seconds OFF Each phase current of compressor cannot be detected normally Refer to 10 5 5 How to check inverter compressor 12 time flash 2 5 seconds OFF Overcurrent Compressor open phase 10 time flash 2 5 seconds OFF Large current flows into intelligent power module IPM The open phase operation of compressor is detected The interphase short out occurs in the output of t
56. ric wiring diagram T64 RT68 165 RTG 57 bapa DC12 24V i LATE 51 TO INDOOR UNIT Use copper conductors only pap For field wiring LEV BRN TUN MIRES SYMBOL WANE SYMBOL NAME SYMBOL WANE Pose qe CT CURRENT TRANSFORMER L62 CMC COIL RT68 OUTDOOR HEAT EXCHANGER C61 C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR DB61 0865 DIODE MODULE MC COMPRESSOR TB1 TB2 TERMINAL BLOCK DSA SURGE ABSORBER MF FAN MOTOR TRA21 SWITCHING POWER TRANSISTOR F801 901 FUSE T3 15AL250V 64 PTC65 CIRCUIT PROTECTION T801 TRANSFORMER 1 802 INTELLIGENT POWER DEVICE RT62 DISCHARGE TEMP THERMISTOR X64 RELAY IPM 1932 INTELLIGENT POWER MODULE RT64 FIN TEMP THERMISTOR L61 REACTOR RT65 AMBIENT TEMP THERMISTOR MUZ GE18NA VERTER P C BOARD CN644 N643 CN641 CNT24 1 90913 19912 199 994 199999968 L062 T68 T65 RT6l RTG LEV SYMBOL NAME SYMBOL NAME SYMBOL NAME CT CURRENT TRANSFORMER 152 CMC COIL OUTDOOR HEAT EXCHANGER CE1 C62 063 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR 0861 DB65 DIODE MODULE MC COMPRESSOR TBI TB TERMINAL BLOCK DSA SURGE ABSORBER
57. rmal condition is kept memorized XX 2 Blinking pattern when outdoor unit is abnormal Blinking at 0 5 second interval 2 5 second OFF 3 second ON He 2 5 second OFF Be Blinking at 0 5 3 second ON second interval 4 Oot E E eee OFF e gt eee No beep Beeps 1 No beep Beeps gt lt L L n D Repeated cycle 25 Repeated cycle Repeated cycle 3 Outdoor unit failure mode table POWER lamp Indoor unit Abnormal point Failure mode protection LED indication Outdoor P C board Condition Indoor outdoor unit failure mode recall function Outdoor unit failure mode recall function None Normal Outdoor power system Overcurrent protection stop is continuously performed 3 times within 1 minute after the compressor gets started Reconnect connectors Refer to 10 5 How to check inverter compressor Check stop valve 3 2 5 seconds OFF Discharge temperature thermistor Defrost thermistor MUZ 1 time flash every 2 5 seconds Fin temperature thermistor 3 time flash 2 5 seconds OFF P C board temperature thermistor 4 time flash 2 5 seconds OFF Ambient temperature thermistor 2 time flash 2 5 seconds OFF Thermistor shorts or opens during compressor running Refer to 10 5 G Check of outdoor thermistors Defective outdoor thermistor
58. rter P C board Yes to 10 i po No board Refer to 10 6 1 o 10 6 1 li es Check the electric parts in main circuit If light up OK If flash refer to 10 3 260 325 VDC OF Inverter P C board Solder side 33 K Check of LEV Expansion valve Turn ON the power supply lt Preparation of the remote controller gt While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds Press OPERATE STOP button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 1 Y x1 Regardless of normal or abnormal condition a short beep Expansion valve operates in full opening direction is emitted once the signal is received Y Do you hear the expansion valve click li k banens Do ves Do you feel the expansion valve vibrate on touching it No Y Is LEV coil properly fixed to Properly fix the LEV coil to the expansion valve the expansion valve No Yes Measure each voltage between connector pins of CN724 on the inverter P C board Y 1 Pin PinD Does the resistance o
59. s bar voltage reaches 320 V or more PAM stops and restarts This is not malfunction PAM protection will be activated in the following cases 1 Instantaneous power voltage drop Short time power failure 2 When the power supply voltage is high 9 time flash 2 5 seconds OFF Inverter check mode The connector of compressor is disconnected inverter check mode starts NOTE 1 The location of LED is illustrated at the right figure Refer to 10 6 1 2 LED is lighted during normal operation The flashing frequency shows the number of times the LED blinks after every 2 5 second OFF Flashing Example When the flashing frequency is 2 0 5 second ON DE 0 5 second ON 2 5 second OFF 27 Check if the connector of the compres Sor is correctly connected Refer to 10 5 How to check inverter compres Inverter P C board Parts side LED Flashing 10 4 TROUBLE CRITERION OF MAIN PARTS MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUY GEO9NA MUY GE12NA MUY GE15NA MUY GE18NA Part name Check method and criterion Defrost thermistor RT61 MUZ Fin temperature thermistor RT64 Measure the resistance with a tester Ambient temperature thermistor RT65 Refer to 10 6 Test point diagram and voltage 1 Inverter P C board for the chart of thermistor Outdoor heat exchanger temperature thermistor RT68 Measure the resistance with a tester Before measur
60. s can be identified by checking the blinking pattern of LED 4 time flash 2 5 seconds OFF Overcurrent 11 time flash 2 5 seconds OFF Large current flows into intelligent power module Reconnect compressor connector Refer to 10 5 How to check inverter compressor Check stop valve Compressor synchronous abnormality Compressor start up failure protection 12 time flash 2 5 seconds OFF Waveform of compressor current is distorted Reconnect compressor connector Refer to 10 5 5 How to check inverter compressor 5 time flash 2 5 seconds OFF Discharge temperature Temperature of discharge temperature thermistor exceeds 241 F 116 C compressor stops Compressor can restart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later eCheck refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV 6 time flash 2 5 seconds OFF High pressure MUZ Temperature of indoor coil thermistor exceeds 158 F 70 C in HEAT mode Temperature of outdoor heat exchanger temperature thermistor exceeds 158 F 70 C in COOL mode Check refrigerant circuit and refrigerant amount Check stop valve Fin temperature P C board temperature 7 time flash 2 5 seconds OFF Temperature of fin temperature thermistor on the inverter P C board exceeds 167 176 F 75 80 C or temperature of P C board temperature thermisto
61. tic noise may enter depending on the electric field strength or the installation condition combination of specific conditions such as antennas or wiring Check the followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor outdoor unit of the air conditioner indoor outdoor wiring grounding wire antennas wiring from antennas receiver Electric field intensity of the broadcast station affected by the electromagnetic noise Presence or absence of amplifier such as booster Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF the power supply once and then turn ON the power supply In this situation check for the electromagnetic noise 2 Within 3 minutes after turning ON the power supply press OPERATE STOP ON OFF button on the remote controller for power ON and check for the electromagnetic noise 3 After a short time 3 minutes later after turning ON the outdoor unit starts running During operation check for the elec tromagnetic noise 4 Press OPERATE STOP ON OFF button on the remote controller for power OFF when the outdoor unit stops but the indoor outdoor communication still runs on In this situation check for the electromagnetic noise
62. tu h Total power consumption kW Airflow 413 CFM 15 25 35 Outdoor intake air WB temperature F 45 55 This value of frequency is not the same as the actual frequency in operating Refer to 7 5 and 7 6 for the relationships between frequency and capacity Total capacity X103 Btu h Total power consumption kW MUZ GE15NA 25 23 21 19 0 9 0 6 Airflow 463 65 75 X We S 75 65 en aure p terme mr doof 15 25 35 45 55 Outdoor intake air WB temperature F 65 70 MUZ GE18NA Total capacity X103 Btu h Total power consumption kW 30 28 Airflow 463 CFM 65 75 26 24 22 20 18 16 14 12 10 2 1 1 9 75 65 17 1 5 1 3 operatu se 14 0 9 Dte ndoof 0 7 05 5 15 25 35 Outdoor intake air WB temperature F 45 55 65 70 This value of frequency is not the same as the actual frequency in operating Refer to 7 5 and 7 6 for the relationships between frequency and capacity 15 7 3 CONDENSING PRESSURE Cooling Data is based on the condition of indoor humidity 50 96 Air flow should be set to H
63. y stress on the components 5 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires X A nf Lead wiring Housing point 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF to indicate an abnormal ity To make sure check how many times the abnormality indication is flashing ON and OFF before starting service work 2 Before servicing check that the connector and terminal are connected properly 3 When the electronic control P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 Refer to 10 2 and 10 3 23 10 2 FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once Even though LED indication listed on the troubleshooting check table 10 3 disappears the memorized failure details can be recalled 1 Flow chart of failure mode recall function for the indoor outdoor unit Operational procedure The cause of abnormality cannot be found because the abnormality does not recur Setting up he failure mode recall function Y Turn ON the power supply remote controller at the same tim First release RESET button Preparation of the remote controller While pressing both OPERAT

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