SERVICE MANUAL MXZ-32SV
Contents
1. lt COOL gt Capacity E COOL Total input id HEAT Capacity HEAT Total input 15 0 15 1 5 1 0 1 0 15 1 0 0 5 0 5 05 05 0 50 100 150 Hz O 50 100 0 50 100 150Hz 0 50 100 150 Hz Frequency Frequency Frequency Frequency 2 09 class unit in single operation lt COOL gt Capacity COOL Total input HEAT Capacity i5 HEAT Total input 1 5 0 15 j 15 1 0 1 0 1 0 1 0 0 5 0 5 0 5 0 5 0 50 100 150 Hz 0 50 100 150Hz 0 50 100 150Hz 0 50 100 150 Hz Frequency Frequency Frequency Frequency 3 12 class unit in single operation lt COOL gt Capacity 2 lt COOL gt Total input m HEAT Capacity lt HEAT gt Total input 15 0 j 1 5 1 0 1 0 12. BRN cay BLK 9 ak E acce nce a NOISE FILTER EUM 1 POWER SUPPLY ORNYUW P C BOARD 8 220 240V s 50Hz TB2 om pe PED MEE 1 5 ORN 6 9 1 RELAY CIRCUIT BRAKER P C BOARD AR E CN913 wooon 7E a Emm mam te 2 UNIT F 3 GRN 1 41516 6 d 82 UNIT B rg 6 4 PEH oz 6 HZ 95 INDOOR N BU pg irs I P M P C BOARD 2 unr LL ___ ____ _ __ 5 28 Unto 3 CNET ELECTRONIC CONTROL P C BOARD 3 GN791 CN792 CN793 CN794 CN722 CN663 CN662 CN661 ERA mA 8 opozas gk t smo gt z ios GIO 25 Dla Glo 8 9908 9d 63H1 RT65 RT66 RT68 62 LEVA LEVB LEVC LEVD RT67 RT69 RT61 SYMBOL NAME SYMBOL NAME SYMBOL NAME C61 POWER FACTOR CAPACITOR LEV A D EXPANSION VALVE SSR61 SOLENOID COIL RELAY C62 63 SMOOTHING CAPACITOR MC COMPRESSOR T801 TRANSFORMER C65 OUTDOOR FAN CAPACITOR MF61 OUTDOOR FAN MOTOR INNER FUSE TB2 3 4 TERMINAL BLOCK CT61 62 CURRENT TRANSFORMER R RESISTOR X61 62 63 FAN MOTOR RELAY DS61 DIODE MODULE RT61 DISCHARGE TEMPERATURE THERMISTOR X64
3. 09 09 12 12 0 80427 _ 15 05 13 08 NOTE MCFH 13NV 1 6 is equivalent to class 12 12000BTU SEH 2AR is equivalent to class 18 18000BTU NOTE Electrical data is outdoor unit only Heating capacity kw Outdoor unit Current power consumption A kw 220V 240V Indoor units combination i i UnitC Unit D 1 13 07 0 27 1 60 5 71 5 23 1 32 0 27 1 70 6 67 1 91 0 27 2 57 2 30 0 27 2 83 5 5 209 9 65 5 w 11 62 5 0 IN 2 07 07 1 93 0 48 2 30 iis 2 05 0 48 2 68 1035 07 09 M 3 N D 5 07 12 80 12759 0 T E o o 6 07418 89 13 54 0 pe Po KI 25 3 09 09 56 11 87 0 09 12 pun Po NE 59 0 86 13 23 09 18 98 14 04 Ey N 0 12 12 0 48 3 98 14 04 uo 12 18 98 14 04 0 2 2 2 2 6 2 2 2 2 5 3 8 3 5 3 2 3 78 3 78 3 78 3 78 3 18 18 98 14 04 0 6 2 42 07 07 07 2 1 10 6 0 5 9 0 2 5 9 3 2 07 07 12 2 1 11 6 0 52 9 3 2 2 1 11 6 0 52 9 3 2 2 1 11 6 0 52 3
4. Tt Oo Liquid pipe 6 35 flared 1 4 1 Installation space lt So Note Leave front and both sides More than Note Obsacle on front and rear sid only clearance fully 100 The unit be used by attaching an optional outdoor outlet guide MAC 855SG but both sides and the top are opend AA 2 Service space 89 3 BS Note Leave front and overhead Z 5 clearance fully 8 Z az go More than More than More than 100 350 100 lt gt 1 5 350 350 gt Le 55 Leave front overhead both clearance fully 8 10 8 WIRING DIAGRAM OUTDOOR UNIT MODELS MXZ 32SV m
5. Relay P C board c je H2DA817G04 High pressure switch 12V DC m DE76N172G03 DE00N173 B 2 1 H oe Short 13 DISASSEMBLY INSTRUCTIONS 13 1 MXZ 32SV OUTDOOR UNIT OPERATING PROCEDURE 1 Removing the compressor 1 Remove the screws fo the service panel and remove it Release refrigerant gas Remove the screws of the top panel and remove it Remove the screws of the front panel and remove it Disconnect the compressor lead wire TAB64 TAB65 TAB66 Disconnect the ourdoor electronic control P C board connectors CN791 CN792 CN793 CN794 CN662 CN722 and CN661 Disconnect the noise filter P C board connectors CN913 6 Remove the four screws of the electrical parts and remove them 7 Remove the propeller 8 Remove the screws of the separator and remove it 9 Detach the brazed joints of the compressor suction and dis charge pipes See Photo 3 10 Remove the three compressor nuts and remove the com pressor 2 3 4 5 gt aH PHOTOS Photo 1 panel EJ Service panel Front BS panel a Photo 2 ontrol P C board uction pipe 4 e braxed part 36 OPERATING PROCEDURE PHOTOS 2 Removing the fan motor 1 Remove the top panel five screws the service panel four screws and
6. m 1 NOTE Electrical data is for outdoor unit only Cooling capacity kw Outdoor unit Current power consumption A kw 220V 240V 0 75 07 9 2 0 26 0 93 512 id Indoor units combination i i UnitC Unit D 0 90 0 26 1 04 4 55 417 1 44 0 26 1 70 ret 2 30 0 26 2 98 11 62 1 54 07 07 855 0 58 1 96 8 1 62 07 09 8 5 0 58 2 05 818 2 28 07 12 8 6 0 58 2 51 3 09 07 18 8 7 0 58 3 65 I 1 90 09 09 8 6 0 58 2 18 2 73 09 12 8 7 0 58 3 22 3 74 09 18 8 8 0 58 4 56 3 96 90 3 96 3 96 0 2 70 2 7 3 0 4 9 4 9 4 2 3 4 4 9 4 2 98 4 27 8 4 2 9 4 2 9 4 2 9 4 2 9 4 2 9 4 2 2 70 2 70 2 70 2 70 2 70 2 70 2 70 2 70 NOTE MCFH 13NV SEH 1 6AR is equivalent to class 12 12000BTU SEH 2AR is equivalent to class 18 18000BTU NOTE Electrical data 15 for outdoor unit only Cooling capacity kw Outdoor unit Current power consumption A kw 220 240V 0704 27 15 05 13 80 Indoor units combination Unit C Unit D 09 09 09 2 67 2 2 98 2 98 2 09 12 12 3 3 0 0704 27 15 05 13 80 2 09 12 18 3 4 0704
7. Power input 2980 260 4270 2780 270 3500 Auxiliary heater Crankcase heater Power factor 90 0 Starting current 15 05 13 80 Compressor motor current 15 71 14 35 13 44 12 27 Fan motor current oefficient of performance C O P 2 68 3 35 Compressor Model THV 247FBA ROTARY Output 2100 Winding resistance at20 C U V 0 61 V W 0 61 W U 0 61 Fan motor Model RA6V60 Winding resistance at20 C WHT BLK 78 7 BLK YLW 26 9 YLW BLU 11 7 BLU RED 83 6 Dimensions WxHxD 900x900x320 35 Weight 79 Sound level Hi 45 47 46 48 Fan speed Hi 630 675 Fan speed regulator 3 Refrigerant filling capacity R 22 3 9 Refrigerating oil Model 870 MS 56 Thermistor RT61 13 4 at 100 Thermistor RT62 10 0 at 25 C Thermistor RT63 17 0 at 50 C Thermistor RT65 Thermistor RT66 67 10 0 at 25 C 10 0 at 25 C Thermistor RT68 69 10 0 at 25 C 1 Electrical data is for only outdoor unit TEST CONDITIONS COOLING INDOOR DB27 0 C WB19 0 C OUTDOOR DB35 0 C WB24 0 C HEATING INDOOR DB20 0 C OUTDOOR DB 7 0 WB 6 0 NOISE CRITERIA CURVES 0 0002 MICRO BAR OCTAVE BAND SOUND PRESSURE LEVEL 0dB MXZ 32SV E1 90 80 70 60 50 40 30 20 NOTCH SPL dB
8. or above the compressor stops and restarts operation in 3 minutes Check the amount of gas and the refriger ant cycle d6 Protection will be released at 100 or below Check the outdoor unit air passage Check the outdoor unit air passage Fin temperature overheat When the temperature thermistor detects 89 C above the Check the power module d4 tection pressor stops and restarts operation in 3 minutes Check the outdoor fan motor Refer to on page 32 Amount of gas 1 High pressure protection 52 0 e ii or output voltage stobs the Outdoor unit air passage d7 P Check the ball valve F 5 Room A gas pipe temperature When short or open circuit occurs in the gas pipe temperature thermistor F5 thermistor abnormality temperature thermistor Contact of P C board eonnediors F 5 Room B gas pipe temperature When short or open circuit occurs in the Room B gas pipe 2 temperature thermistor F6 thermistor abnormality temperature thermistor s Contact of P C board connaciors F1 Room C gas pipe temperature When a short or open circuit occurs in the Room C gas pipe 4 temperature thermistor F7 thermistor abnormality temperature thermistor Contact of P C board connectors 09 Room D gas pipe temperature When short open circuit occurs in the Room D gas pipe 2 temperature P9 thermi
9. Fin temperature thermistor RT65 Between CN663 pin1 and pin2 9 Check of fan motor Check the connection of connector CN851 CN852 in the fan motor relay connector and electronic control P C board at the noise filter P C board and connector CN901 CN902 in the noise filter board Disconnect the fan motor connector and measure the resistance of the Abnormal p uic e Replace the fan motor fan motor winding to check the winding characteristic Normal 1 Disconnect the lead wire leading to the compressor Turn on power supply to the indoor and outdoor unit Three minutes later EMERGENCY OPERATION starts 2 Check the voltage between pin 2 and pin 3 pin 2 and pin 5 pin 2 and pin 6 at the fan motor connector Y Is there voltage of 220V AC 240V AC 1 off power supply of the indoor and outdoor unit and disconnect the connector CN851 CN852 2 15 the voltage OV when the voltage between CN852 1 and CN851 pin1 pin2 or pin3 are measured after the power supply is turned on the outdoor unit Yes Is there voltage of 12V DC between CN852 pin1 and pin3 when power supply turns on the indoor unit and EMERGENCY OPERATION starts in three minutes No Replace the electronic control P C board V Yes Replace the noise filter P C board 32 Check of HPS 1 Disconnect the connector CN
10. 0 3 78 3 78 3 78 3 2 78 3 78 3 78 3 78 3 78 3 48 48 48 48 48 48 48 48 2 00 12 22 30 12 63 50 14 04 07 07 18 50 14 04 07 09 09 50 14 04 07 09 12 50 14 04 9 3 2 1 11 6 0 52 2 9 3 07 09 18 2 1 11 6 0 52 50 14 04 2 9 3 07 12 12 2 1 11 6 0 52 50 14 04 2 9 3 07 12 18 2 1 11 6 0 52 50 14 04 2 9 3 07 18 18 2 1 11 6 0 52 50 14 04 NOTE MCFH 13NV SEH 1 6AR is equivalent to class 12 12000BTU SEH 2AR is equivalent to class 18 18000BTU NOTE Electrical data is outdoor unit only Heating capacity kw Outdoor unit Current power consumption A kw 220V 240V 9 3 2 78 09 09 09 31 0 52 3 50 14 04 12 87 Indoor units combination UnitC Unit D 9 3 2 78 9 3 2 78 09 09 18 4 4 0 52 3 50 14 04 12 87 09412412 3 5 9 3 0 55 3 50 14 04 12 87 09 12 18 9 3 0 55 3 50 14 04 12 87 09 18 18 9 3 0 55 3 50 14 04 12 87 9 3 2 78 12412418 E 0 52 3 50 14 04 12 87 9 3 2 78 2 78 07407407409 U Sit 0 60 3 50 14 04 12 87 07407407412 1 E 060350 14 04 12 87 2 78 07 07 07 18 rave 0 60 3 50 14 04 12 87 2 78 07 07 09 09 ror 0 60 3 50 14 04 12 87 07 07 09 12 1 060350 _ 14 04 1287 U 2 78 07 07
11. 21 2 gt 9 10 16871 1 20 amp a 2 is 702 PCW PC782 PCTA2 s ea EA SES Se jo SES SS C851 a 8706 RIBS Ge Bd 5 00 676 g x B 2 lt lt s pce 9 n Relay 12V DC LED monitor indication High pressure switch Liner expansion valve LEV 12V DC pulse wave Gas pipe temperature thermistor 2 5 4 0V 34 Noise filter 911 OUTDOOR FAN gu ao 220V 240V 220V 240V AC sO i OUTPUT 5 jJ i i RITI ll 1 x a oti ik 5 1 f 8i fan em 220V 240V j e INPUT 16 Lid Rooz coo Pins E dr 186 REVERSING VALVE 220V 240V o TD AE cou Ts eee i o Lie LJ I P M P C board 12V DC 12V DC aa oEoohisss 8 esl se Fog PS 7 PC5S1 m GN DB2t q 4 4 4r ji 8 i 5 26521 Ya Lo lt s20v DC p zm BET ROS 8 Lo 4 55 pur E
12. 0 1 0 0 5 0 5 0 5 0 5 0 50 100 O 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz Frequency Frequency Frequency Frequency 4 18 class unit in single operation lt COOL gt Capacity T COOL Total input lt gt lt HEAT gt Total input 1 5 1 15 1 0 10 10 10 0 5 0 5 0 5 0 5 0 50 100 150Hz 0 50 100 150Hz 0 50 100 150Hz O 50 100 150 Hz Frequency Frequency Frequency Frequency 14 10 3 4 Outdoor low pressure and outdoor unit current 1 07 class unit in single operation OUTDOOR UNIT MXZ 32SV unit of pressure has been changed to MPa on the international system of units SI unit system The converted score against the traditional unit system can be gotten according to the formula below 1 MPa 10 2 kgf cm G 1 COOL operation Both indoor and outdoor units under the same How to work fixed frequency operation i temperature humidity condition i1 Set emergency switch to COOL or HEAT The switch is locat i Dry bulb temperature C Relative humidity ed on indoor unit 50 50 i2 Press emergency run ON OFF button i 3 starts running at 58Hz COOL 40Hz HEAT 25 60 4 1 fan runs at HI speed and continues for 30 minutes 30 70 5 To cancel this operation press emergency run ON OFF button or any button on remote controller flow speed GInverter output
13. 09 18 s 0 60 3 50 14 04 12 87 07407412412 1 2 060350 1404 12 87 2 78 07407412418 j 5 0 60 3 50 14 04 12 87 2 78 07409409409 1 83 0 60 3 50 14 04 12 87 07409409412 1 060350 1404 12487 2 78 07 09 09 18 1 8 0 60 3 50 14 04 12 87 07409412412 1 zu 60350 _ 104 12 87 09 09 09 09 2 i e 060350 _ 14 04 12487 09 09 09 12 2 J Ed 60350 _ 14 04 12 87 09 09 09 18 1 60350 14 04 12 87 09 09 12 12 1 2 60350 _ 14 04 12 87 NOTE MCFH 13NV 1 6 is equivalent to class 12 12000BTU SEH 2AR is equivalent to class 18 18000BTU SPECIFICATION Outdoor model MXZ 32SV Outdoor unit power supply Single phase 220 240V 50Hz Indoor units number 2104 Indoor units total capacity Connectable Total model name 42 indoor units total capacity Simultaneous operation Total model name 42 Piping total length Max 60 Connecting pipe length Max 25 Height difference Indoor Outdoor 10 Height difference Indoor Indoor 10 Function Cooling Heating Capacity Capacity 8 0 0 9 9 0 9 3 0 9 11 6 Dehumidification Outdoor air flow 2400 2640 Electrical Power outlet 25 Running current 15 05 13 80 14 04 12 87
14. 27 15 05 13 80 09 18 18 31 0704 27 15 05 13 80 12 12 12 076427 15 05 13 80 12 12 18 076427 15 05 13 80 2 07 07 07 07 0 80427 15 05 13 80 07407407409 0 80 4 27 15 05 13 80 07 07 07 12 0 80 4 27 15 05 13 80 07 07 07 18 0 80427 15 05 13 80 2 07 07 09 09 0 80427 15 05 13 80 07 07 09 12 0 80427 15 05 13 80 2 07 07 09 18 0 80427 _ 15 05 13 80 07 07 12 12 0 80427 _ 15 05 13 80 07 07 12 18 0 80427 _ 15 05 13 80 07 09 09 09 0 80 4 27 15 05 13 80 07 09 09 12 0 80427 15 05 13 80 07 09 09 18 0 80 4 27 15 05 13 80 07 09 12 12 0 80427 15 05 13 80 09 09 09 09 0 860427 _ 15 05 13 80 2 09 09 09 12 0 80427 _ 15 05 13 08 09 09 09 18 0 80427 _ 15 05 13 08 COCO oo oo
15. 5 x 5 96 es Punxhed hole 534 MAC 855SG 766 8 7608 22 29 2 1 42 Connected pipes Length Length MXZ 32SV Model name Model code diameter mm B 454 51 454 952 127 127 69 A IN 3 8 1 2 1 2 different 12 7 49 52 49 52 diameter MAC 455JP 51H 455 1 5 3 8 3 8 65 pipes 1 12 7 15 88 15 88 456 516456 1 5 5 8 5 8 66 5 a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO100 8310 TELEX J24532 CABLE TOKYO Copyright 2000 MITSUBISHI ELECTRIC ENGINEERING CO LTD New publication effective May 2000 Issued in May 2000 No OB254 523 Specifications subject to change without notice Printed in Japan
16. 65 RELAY DS62 DIODE STACK RT62 DEFROST TEMPERATURE THERMISTOR X66 67 RELAY F801 FUSE 1A RT63 EVAPORATION TEMPERATURE THERMISTOR 2154 R V COIL F911 FUSE 1A RT65 FIN TEMPERATURE THERMISTOR 63H1 HIGH PRESSURE SWITCH L REACTOR RT66 67 GUS PIPE TEMPERATURE THERMISTOR 63H2 HIGH PRESSURE SWITCH L61 COMMON MODE CHOKE COIL RT68 69 GUS PIPE TEMPERATURE THERMISTOR NOTE 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symboles below indicate Terminal block Connector 11 9 REFRIGERANT SYSTEM DIAGRAM MXZ 32SV E High pressure switch 1 High pressure swich2 O oi separator Ball valve with Unit D gas pipe temperature thermistor 52 Indoor or unit L Compressor E Discharge temperature thermistor Capillary tube 2 5X 0 6 1000 Unit mm 16 Refrigerant flow in cooling Refrigerant flow in heating Reversing valve coil heating ON cooling OFF Accumulator Unit C gas pipe temperature thermistor service port Indoor unit 9 52 Reversing Unit gas pipe temperature thermistor E 62 Indoor unit lt T 16 B Unit A gas pipe e temperature thermistor Indoor unit 12 Evaporation A temperature th
17. BACK VIEW 10 1 1 CAPACITY AND THE INPUT CURVES Cooling capacity Total input cooling 75 6 7 8 7 10 8 1 4 1 4 370 10 1 13 264 9 3 812 26 i12 9 9 26 24 22 55 9 8 5 811 24 9 1 1 20 HEN 77 810 Ind 5 5 55 7 gl oor 2251 0 i 2 8 WB ie 20 WB temperature P 4 8 0 9 18 99 doo intake 27 30 35 40 43 27 30 35 40 43 Outdoor intake air DB temperature C Outdoor intake DB temperature C Heating capacity 5 Total input heating 1 2 5 F aret 26 2 1 1 wake at pp en 20 ag x 51 0 indoor 2 5 gt fos 55 508 97 0 6 5 0 5 10 15 10 5 10 15 5 0 Outdoor intake WB air temperature C Outdoor intake air WB temperature C 13 10 3 2 Capacity and input correction by inverter output frequency OUTDOOR UNIT MXZ 32SV NOTE 1 Inverter output frequency COOL 58Hz HEAT 40Hz NOTE 2 The dotted line on graphs connects the frequency range in normal operation shown by the full line and the frequency in test run shown by the point 1 07 class unit in single operation
18. Relative humidity 1 5 switch to COOL or HEAT The switch is locat i i ed on indoor unit 20 50 i2 Press emergency run ON OFF button 25 60 i3 Compressor starts running at 58Hz COOL 40Hz HEAT 30 70 i4 Indoor fan runs at HI speed 5 cancel this operation press emergency run ON OFF button Air flow speed or any button on remote controller Inverter output frequency 58Hz Gauge MPa Gauge 8 7 lt E Put 6 o 5 5 ie 9 5 5 a 8 2 3 2 0 1 z 5 18 20 25 30 32 18 20 25 30 32 50 60 70 50 60 70 Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity 2 HEAT operation Indoor DB C 20 0 Outdoor gt 2 7 15 20 0 WB C 14 5 WB C 1 6 12 145 Q Set air flow to Hi speed Inverter output frequency is 58Hz Outdoor unit current A 2 5 10 15 20 25 Ambient temperature C 11 MICROPROCESSOR CONTROL INVERTER MULTI SYSTEM CONTROL MXZ 32SV Indoor unit microprocessor 55861 Output signal Input signal Compressor Compressor Compressor power primary secondary factor current current Outdoor unit control microprocessor Drive circui
19. T2W E40 523 REAR GUARD 1 6 T2W E70 248 REAR PANEL 1 7 T2W E40 247 PIPE COVER 1 8 M21 48A 961 4 WAY VALVE 1 9 T2W E79 646 HIGH PRESSURE SWICH 63H1 1 2 75MPa 28kg cm T2W E40 646 HIGH PRESSURE SWICH 63H2 1 3 43MPa 35kg cm 11 M21 42E 644 UNION 1 1 2 3 8 1 4 SET 12 T2W E70 651 EXPANSION VALVE LEVA 1 A room 13 T2W E70 652 EXPANSION VALVE LEV B 1 B room 14 T2W E70 653 EXPANSION VALVE LEV C 1 C room 15 T2W E70 654 EXPANSION VALVE LEV D 1 D room 16 M21 AS2 290 BASE ASSEMBLY 1 17 M21 42b 630 HEAT EXCHANGER 1 18 92 500 800 COMPRESSOR MC 1 THV 247FBA M21 986 936 CAPILLARY TUBE 24 0x42 4x2000 3 4 0x42 4x400 20 M21 LVO 936 CAPILLARY TUBE 5 043 0 02 0 200 4 3 0 02 0 200 4PCS SET T2W E59 936 CAPILLARY TUBE 42 5x40 6x1000 2 ERU EET When servicing cut the tube to the proper length as shown in the REFRIGERANT SYSTEM DIAGRAM See page 12 14 3 ACCESSORY PARTS MXZ 32SV E 1 Symbol Q ty unit No Parts No Parts Name in Wiring MXZ 32SV Remarks Diagram E1 1 T2W E59 704 DRAIN SOCKET ASSEMBLY 1 41 15 OPTIONAL PARTS 15 1 Different diameter pipe Unit mm inch 15 2 Outlet guide Changes air discharge direction Applied unit Model name Model code MXZ 32SV MAC 855SG 51H 855 Punshed hole saft
20. Target discharge temperature 8 to Target discharge temperature 11 Target discharge temperature 11 or less 11 2 Operational frequency range of gt Number i capacity operatin p ani cord 5 9 x H S 4 lo co S 02 a Min Max 68 _ A Note When the fan speed of indoor unit is total Lo notch restrict the maximum frequency is restricted in 6 7 of the rated frequency DRY COOL Maximum frequency 8 10 of maximum frequency 9 10 of maximum frequency 1 7 10 of maximum frequency 11 3 Heat defrosting control 1 Conditions to enter defrosting mode When temperature of defrosting thermistor is 3 or less When specified non defrosting time is counted in the control p c board is satisfied Total time of compressor operating Going to defrosting mode at both condition of and 2 Defrosting operation Compressor stops for 50 seconds Indoor fan is off Defrosting lamp lights 4 way valve reverses flow Compressor operates by the frequency in heat defrosting control After compressor stops for 35 seconds 4 way valve reverses flow then defrosting finishes 3 Conditions to finish defrosting mode When the defrosting thermistor temperature is 8 C or more When it has spent 10 minutes for defrosting Defrosting finishes at condition of 11 4 High or low pressu
21. frequency 58Hz Gauge MPa Gauge 8 7 lt 5 5 5 5 5 S 4 5 3 2 0 2 0 18 20 25 30 32 18 20 25 30 32 50 60 70 50 60 70 Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity 2 HEAT operation Indoor DB C 20 0 Outdoor DB c 2 7 15 20 0 WB C 14 5 WB C 1 6 12 14 5 Q Set air flow to Hi speed Inverter output frequency is 40Hz Outdoor unit current A 2 5 10 15 20 25 Ambient temperature C 2 09 class unit single operation OUTDOOR MXZ 32SV NOTE The unit of pressure has been changed to MPa on the international system of units SI unit system The converted score against the traditional unit system can be gotten according to the formula below 1 G 10 2 G 1 COOL operation Both indoor and outdoor units are under the same temperature humidity condition How to work fixed frequency operation Dry bulb temperature C Relative humidity it Set emergency switch to COOL or HEAT The switch is locat i ed on indoor unit 20 50 i2 Press emergency run ON OFF button 25 60 3 starts running at 58Hz COOL 40Hz 30 70 fan run
22. mis piping See page 31 Check of LEV Shortage of capacity See page 31 25 12 3 Troubleshooting check table Note LED indicates ZZ in the normal status 7 segment LED display Error mode an Normal If there is defect in the following parts electronic control P C board relay P C board high pressure switches 63H1 63H2 indoor outdoor fan motor or indoor coil thermistor the compressor may stop even with the display remained at 22 any case reset the breaker and check the above stated parts Symptom Outdoor unit does not operate Display Detecting method Detecting method Check points Outdoor power vetem abnor When the compressor operation has been interrupted by overcurrent inverter output malit p y protection continuously three times within 1 minute after start up 5 4 compressor stops operation a3 Outdoor electronic control When the nonvolatile memory data cannot be read properly on the out board abnormality door controller board Outdoor eleciranio control board pi Indoor unit and LEV abnor When the drain abnormality is detected in the indoor unit and the indoor Check the abnormality indication on the malit main coil temperature is too low or when any abnormality is detected in indoor unit P1 y the components of indoor unit LEV Symptom Outdoor unit stops and restarts every 3 minutes D
23. vl Lighting Flashing 7 4 E 71 33 TEST POINT DIAGRAM AND VOLTAGE MXZ 32SV E1 Electronic control P C board 2 gt Resistance 5 Discharge temperature thermistor gt gt 0 0 10 20 30 40 50 60 70 80 90 100 110 120 Temperature C Gas pipe temperature thermistor Evaporation temperature thermistor Defrost temperature thermistor 0 3 0 6V DC Evaporation temperature thermistor 2 5 4 0V DC Fin temperature thermistor 1 0 4 0V DC Resistance 0 9 0 10 20 30 40 12V DC Discharge temperature thermistor Defrost temperature thermistor 2 5 4 0V DC Outdoor fan ON 12V DC Outdoor fan Lo 12V DC 0 Outdoor fan Me 12V DC Serial signal Room Serial signal Room C 5 10V DC 10 20 30 40 50 Temperature D 5 10V DC Gonzo 0 5V DC ds oen Serial signal Room B 5 10V DC Serial signal Room A 5 10V DC 5v pc 1 au R877 R879 RET 476 8878 10 Ll 1 qe zu
24. 2 Turn on power supply to the indoor and outdoor unit three minutes later OPERATION COOL operation starts Is there voltage of 220V AC 240V AC between No pin1 and pin 2 at connector CN913 per P 2 the tway yave Tres 1 Turn off power supply of indoor and outdoor unit and disconnect connector CN851 CN852 in the electronic control P C board 2 Turn on power supply to the indoor and outdoor unit three minutes later EMERGENCY OPERATION COOL operation starts Is there voltage 12V DC between No the connector CN852 pin 1 gt Replace the noise filter P C board A53 and CN851 pin verre X1 If the connector CN913 is not connected or R V coil is open voltage Yes occurs between terminals even when the control is OFF Replace the electronic control P C board 30 Check of LEV Turn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely Is click click sound heard Yes Or do you feel vibration of the LEV coil with a hand Disconnect the connector CN791 unit A CN792 unit B CN793 unit C Yes Replace the electronic CN794 unit D and measure the resistance of control P C board LEV coil to check the integrity Replace the LEV coil Check of inverter compressor Disconnect the lead wire to the compressor at terminals and turn on power supply to the indoor and outdoo
25. 5 1 4 Liquid 6 35 1 4 Liquid 6 35 1 4 12 13 3 a 1 4 Indoor unit B q Gas 12 7 1 2 Gas 12 7 1 2 Gas 12 7 1 2 Liquid 6 35 1 4 Liquid 6 35 1 4 6 35 1 4 18 Indoor unit Gas 15 88 5 8 Gas 15 88 5 8 Gas 9 52 3 8 Liquid 6 35 1 4 Indoor unit D Gas 9 52 3 8 10 PERFORMANCE CURVES The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions since operating conditions vary according to the areas where these units are installed The following information has been pro vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve 1 GUARANTEED VOLTAGE Rated voltage 10 198 264V 50Hz 2 AIR FLOW Air flow should be set at MAX 3 MAIN READINGS 1 Indoor intake air wet bulb temperature CWB 2 Indoor outlet air wet bulb temperature CWB Cooling 3 Outdoor intake air dry bulb temperature CDB 4 Total input 5 intake air dry bulb temperature 6 Outdoor intake air wet bulb temperature CWB Heating 7 Total input Indoor air wet dry bulb temperature difference the left side of the chart on page 14 15 shows the difference between the indoor intake air wet dry bulb temperature and the indoor outlet air wet dry bulb temperature for your refer ence at service How to measure the indo
26. 722 in the electronic control P C board 2 Check the resistance of HPS after 1 minutes have passed since the outdoor unit power supply was turnd Check the resistance between Infinity each terminal Replace HPS 63H1 Return CN722 to former Turn on power supply to the indoor and outdoor unit 3 minutes lator EMERGENCY OPERATION starts Is HPS protection displayed immediately after compressor starts Yes The other cases In the case that the indoor fan and outdoor fan operate but the compressor does not operate it causes that high pressure switch can be operated once First of all check the high pressure switch can be shorted turn OFF the power and turn ON again 1 minute later Indoor unit dose not operate difference modes When you try to run two indoor unit simultaneously one for cooling and the other for heating the unit which transmits signal to the outdoor units earlier decides the operation mode The other unit indicates as shown in the figure below When the above situation occurs set all the indoor units to the same mode turn OFF the indoor units and then turn them back ON Though the top of the indoor unit sometimes gets warm this does not mean malfunction The reason is that the refrigerant gas continuously flows into the indoor unit even while it is not operating Replace the electronic control board OPERATION INDICATOR vl vl
27. A COOL 220V 45 COOL 240V 47 O O HEAT 220V HEAT 240V 48 A Test conditions Cooling DB35 C Heating DB 7 WB24C WB 6C 5221 1 60 50 ULLA FAITH 4 x g APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NC 20 F lt Eo c ESL L NOISE 63 125 250 500 1000 2000 BAND CENTER FREQUENCIES Hz 4000 8000 7 OUTLINES AND DIMENSIONS Unit mm OUTDOOR UNIT MXZ 32SV amp D o 2 U shape notched holes 200 500 200 ase po 95 Rubber m Air in gt pa DA gt T T Air in S E by K Air out 5 2 2 12 X 36 Oval hole ase bolt M10 9 52 flared 3 8 D unit Z 12 7 flared 1 2 B unit Indoor and Handle for outdoor i connect wirin moving 23X45 hole j R 2 4 6
28. ADVANCED EVER ADVANCING MITSUBISHI ELECTRIC MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONER No OB254 Inverter controlled multi system Model MXZ 32SV CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND FUNCTIONS 2 3 INDOOR OUTDOOR CORRESPONDENCE TABLE 3 4 INDOOR UNITS COMBINATION 4 5 SPECIFICATION e n 8 6 NOISE CRITERIA CURVES 9 7 OUTLINES AND DIMENSIONS 10 8 WIRING DIAGRAM 11 b 9 REFRIGERANT SYSTEM DIAGRAM 12 10 PERFORMANCE CURVES 13 11 MICROPROCESSOR CONTROL 19 12 0 25 13 DISASSEMBLY INSTRUCTIONS 36 PARTS Sue _ 39 15 OPTIONAL PARTS u 42 This manual describes technical data of outdoor unit For indoor unit refer to the service manuals No OB229 OB227 REVISED EDITION B OB252 OB212 OB239 and OC165 of corresponding models 1 TECHNICAL CHANGES MXZ 32RV gt 7 325 1 The combination pattern of the indoor unit has increased 2 Crankcase heater has disused 3 Refrigerant ci
29. at i indoor unit 20 50 i2 Press emergency run ON OFF button i 25 60 3 Compressor starts running at 58Hz COOL or 40Hz HEAT 30 70 4 Indoor fan runs at HI speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button Air flow speed HI or button on remote controller lnverter output frequency 58Hz EE EEEE O AOE E OO E EE Gauge MPa Gauge 8 7 lt 5 5 5 5 5 o 3 2 18 20 25 30 32 50 60 70 Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity 2 HEAT operation Indoor DB C 20 0 Outdoor pg c 2 7 15 20 0 WB C 14 5 WB C 1 6 12 14 5 Q Set air flow to Hi speed Inverter output frequency is 40Hz Outdoor unit current A 2 5 10 15 20 25 Ambient 4 18 class unit single operation NOTE The unit of pressure has been changed to MPa on the international system of units SI unit system The converted score against the traditional unit system can be gotten according to the formula below 1 G 10 2 G 1 COOL operation Both indoor and outdoor units are under the same temperature humidity condition How to work fixed frequency operation Dry bulb temperature G
30. emarks MXZ 32SV E1 Diagram 1 M21 17A 501 PROPELLER FAN 1 2 T2W E40 301 OUTDOOR FAN MOTOR MF61 1 3 T2W E40 452 I P M P C BOARD 1 4 21 17 447 DIODE STACK DS62 1 5 M21 17A 443 DIODE MODULE DS61 1 6 21 17E 337 REACTOR L 1 7 T2W E40 357 POWER FACTOR CAPACITOR C61 1 2204F 400V 8 T2W E40 356 SMOOTHING CAPACITOR C62 C63 2 250042 400V 9 T2W E70 451 ELECTRONIC CONTROL P C BOARD 1 10 T2W E67 424 NOISE FILTER P C BOARD 1 11 T2W E65 376 TERMINAL BLOCK TB3 4 12 T2W E65 375 TERMINAL BLOCK TB2 1 13 M21 42A 340 RELAY X64 1 14 T2W E70 307 GAS PIPE TEMPERATUR THERMISTOR RT66 67 68 69 1 A B C D 15 M21 42A 308 FIN TEMPERATURE THERMISTOR RT65 1 16 M21 17A 362 RESISTOR R 1 17 T2W E70 308 THERMISTOR SET RT61 62 63 1 DISCHARGE DEFROST 18 T2W E70 398 R V COIL 2154 1 49 T2W E40 441 RELAY BOARD 1 60 T2W E66 382 FUSE F801 F911 2 39 14 2 OUTDOOR UNIT STRUCTURAL PARTS MXZ 32SV Part numbers that are circled are not shown in the illustration E gt SS caGat s EN yf MMM MY Mf SS 15 14 12 13 16 Symbol Q ty unit No Parts No Parts Name in Wiring Remarks Diagram MXZ 32SV E1 1 21 AS2 232 FRONT 1 2 M21 17A 245 SERVICE PANEL 1 3 M21 17 249 SIDE PANEL 1 4 M21 17A 297 TOP PANEL 1 5
31. erminals using a tester Y RED Winding temperature 10 C 40 C Normal abnormal 1 4 1Each phase 0 530 0 660 Opened short circuited Outdoor fan motor Measure the resistance between lead wires using a tester Part temperature 10 C 40 C Normal abnormal WHT BLK 69 00 86 00 Opened or BLK YLW 23 00 30 02 short circuited YLW BLU 10 00 13 00 Not including RED BLK 73 00 91 00 WHT ORN Measure the resistance using a tester Part temperature 10 C 40 C R V coil Normal abnormal 16400 23100 Opened or short circuited Linear expansion valve Measure the resistance using a tester Part temperature 10 40 WHT Lead wire color Normal Abnormal RED ORN MAC ORN _ YLW BRN 21 260 Opened short circuited BRN BLU YLW BRN BLU Measure the resistance using a tester Part temperature 10 C 40 C Pressure Normal abnormal High pressure switch Operation OFF HPS HPS1 2 35 0 15MPa 24 1 5kg cm Short Other than HPS2 2 55 0 2MPa 26 2kg cm those list HPS1 2 75 5 95 MPa 28 9 8 kg cm 8 ed at left HPS2 3 43 8 s MPa 35 9 skg protector 28 Check of power supply Check the connecting of main circuit parts and connector CN501 I P M P C board CN 801 Electronic control P C board CN554 relay P C b
32. ermistor Outdoor RT67 heat exchanger Capillary tube 9 3 0 42 0 200 lt Q9 Ball valve with Capillary tube Strainer Capillary tube 6 service port 2 5X40 6X 75 I 93 0 2 0 200 c 2 5 40 6 750 Indoor unit lt 62 I Capillary tube Defrost Strainer Capillary tube EV 76 SQ thermistor DE 3 0 02 0 200 gt Indoor unit lt T Strainer Capillary tube lt gt 6 Distributor Distributor 3 0X42 0X 200 9 52 Indoor unit lt Strainer LEV 6 Strainer Indoor units Outdoor H Piping length each indoor unit a b c d 25m Total piping length a b c d 60m Height difference between units 10m Bending point for each unit 25 z Total bending point 60 does not matter which unit is higher Refrigerant pipe diameter is different according to indoor unit to be connected When using extension pipes refer to the tables below When diameter of refrigerant pipe is different from that of outdoor unit union use optional Different diameter pipe For further information on Different diameter pipe see page BACK COVER Unit mm inch 12 Indoor unit Outdoor unit union diameter Extension pipe diameter class Pipe diameter For Liquid 6 35 1 4 Liquid 6 35 1 4 6 35 1 4 07 09 Indoor unit Gas 9 52 3 8 Gas 9 52 3 8 Gas 12 7 1 2 Liquid 6 3
33. heat and minimum super heat Difference of LEV opening superheat correction pulse morethan9 8 6109 ___ 6 306 6orless 0 21 3 LEV opening correction by discharge temperature When LEV correction output is 0 pulse by the suction super heat at cool or dry operation or dry operating correct LEV is cor rected according to the following table The target discharge temperature is determined according to frequency zone and number of operation unit of the compressor Operation 5 6 62 55 4 4 4 275 0 57 64 66 6 5 52 51 5 81 40 65 68 78 75 6 55 54 55 59 70 v0 77 8 88 6 6 6 6r mro 72 6 90 9 8 6 6 6 91 mamum 74 8 90 6 74 2 Z Correct the LEV opening according to difference between the target discharge temperature and discharge temperature LEV opening Discharge temperature correction pulse COOL HEAT more than Target discharge temperature 11 Target discharge temperature 11 to Target discharge temperature 8 4 Target discharge temperature 8 to Target discharge temperature 5 Target discharge temperature 5 to Target discharge temperature 2 1 2 Target discharge temperature 2 to Target discharge temperature 2 O o Target discharge temperature 2 to Target discharge temperature 5 Target discharge temperature 5 to Target discharge temperature 8
34. isplay Detecting method Detecting method Check points Check the characteristic of the evapora 9 Evaporation temperature ther The compressor stops when short or open circuit occurs in the evap 2 thermistor Refer to E9 mistor abnormality oration temperature thermistor during compressor running Check the contact of P board nectors 6 E6 Discharge temperature ther mistor abnormality The compressor stops when a short or open circuit occurs in the dis charge temperature thermistor during compressor running Check the characteristic of the discharge temperature thermistor Refer to on page 32 Check the contact of P C board con nectors F8 F8 Fin temperature thermistor abnormality The compressor stops when a short or open circuit occurs in the fin tem perature thermistor during compressor running Check the characteristic of the fin temper ature thermistor Refer to on page 32 Check the contact of P C board connec tors 48 8 Overcurrent protection When over current is applied to the power module the compressor stops and restarts in 3 minutes Check the inverter and compressor Refer to on page 31 Check the amount of gas Check the indoor outdoor air flow for short cycle Check the indoor unit air filter for clogging 46 Discharge temperature heat protection When the discharge temperature thermistor detects 116
35. nation of LEV standard opening in each indoor unit The standard opening is on the straight line which connects an each standard point in the section where divided into seven according to the operation frequency of compressor as shown in the figure below LEV opening is controlled in proportion to the operation frequency Note Opening is adjusted at the standard opening according to the indoor unit conditions However inclination of standard opening in each point of opening does not change with the original curve Add opening provided in Difference in Capacity in the table below to the standard opening from 1 to 8 when capacity of the indoor unit is excluding code 1 Add opening provided in Difference in Operation number in the table below to determined LEV opening for each indoor unit when 2 3 or 4 indoor units are operated at the same time Note Even when the adjusted standard opening exceeds the driving range from 59 to 500 pulse actual driving output opening is in a range from 59 to 500 pulse Calculation example of LEV opening Cool operation Compressor frequency 70Hz 2 unit ON 18class 170 150 80 60 x 70 60 150 75 30 205 pulse Standard opening e e COOL HEAT LEV opening Pulse 20 40 60 80 100 120 140 Operation frequency of compressor Hz F 20 in Difference in Standard opening ps S 7 e 2 4 COOL aeo eo ea fa e eo zs 58 HEAT Indoor uni
36. nit air passage d3 changes d H L w discharge temperature When the state with low discharge temperature of which 50 C in COOL 2 board 9 p and 48 4 or less in HEAT for 20 minutes the compressor operates con p protection Check the contact of LEV board connec d1 tinuously los Symptom Outdoor unit operates Display Detecting method Detecting method Check points 1 When a short or open circuit occurs in the defrost thermistor during Defrost thermistor characteristic Defrost thermistor abnormality heating Contact of P C board connectors E7 In this case the compressor continues to operate h u Power factor detection abnor When the compressor power factor cannot be detected n T h4 mality n this case the compressor keeps running Compressor wiring 27 12 4 Trouble criterion of parts Part name Check method and criterion Measure the resistance using a tester Defrost thermistor Part temperature 10 C 40 C Evaporation Gas pipe temperature thermistor Normal abnormal 55kQ Opened or short circuited Measure the resistance using a tester after warming up the thermistor by holding by hand Discharge temperature Part temperature 20 40 termistor Normal abnormal 100kQ 250kQ Opened or short circuited Compressor Measure the resistance between t
37. oard Is there voltage of 220V AC 240V AC the power supply terminal block Check the power supply cable Yes Is there voltage of 220V AC 240V AG Is there voltage of 310V DC 340V DC across the output cable LD63 LD64 No Replace the noise across the smoothing capacity filter P C board No the current limiting resistor When replacing check the V Yes connection of connector CN720 in the outdoor Check the main circuit parts electronic control P C and replace it board in the noise filter P C board Yes lt o Replace the electronic control P C board Is there voltage of 220V AC 240V AC across the input terminal part in the diode module DS61 Check of serial signal Start 11 1 Check the indoor unit with referring to the indoor unit service manual 2 Turn off the power supply of the indoor and outdoor unit and return the indoor outdoor unit connecting wire to former original 3 Check the connection of indoor outdoor unit connecting wire in the outdoor unit terminal block and check the connection of the connector CN601 unit A CN 602 unit B CN603 unit C CN604 unit D in the electronic control P C board 4 Disconnect the lead wire to the compressor Turn on the power supply indoor outdoor unit 3 minutes later EMERGENCY OPERATION starts Is there voltage
38. of 5V DC 10V DC between No No 3 and N in the outdoor terminal block M Replace the electronic control P C board Yes Recheck a connected circumstance of the indoor outdoor unit connecting wire 29 Check of V coil When heating operation does not work 1 Disconnect the lead wire leading to the compressor 2 Turn on power supply to the indoor and outdoor unit three minutes later OPERATION HEAT operation starts 1 power supply of indoor and outdoor unit and Is there voltage of 220V 240V AC between disconnect the connector CN851 CN852 in the electronic pint and 2 at connector CN913 control P C board Yes 2 Turn on power supply to the indoor and outdoor unit three 5 minutes later EMERGENCY OPERATION Turn off power supply of indoor and outdoor unit HEAT operation starts Is there voltage 12V DC between the connector CN852 pin 1 and pin 5 Disconnect the connector CN913 in noise filter board and measure the resistance of R V coil to check the integrity No Replace the electronic control P C board Nop Replace the R V coil Yes Yes Replace the noise filter P C board Replace the 4 way valve When cooling operation does not work 1 Disconnect the lead wire leading to the compressor
39. or air wet bulb dry bulb temperature difference 1 Attach at least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure and at least 2 sets of wet and dry bulb thermometers to the indoor air outlet The thermometers must be attached to the position where air speed is high 2 Attach at least 2 sets of wet and dry bulb thermometers to the outdoor air intake Cover the thermometers to prevent direct rays of the sun 3 Check that the air filter is cleaned 4 Open windows and doors of room 5 Press the EMERGENCY OPERATION switch once twice to start the EMERGENCY COOL HEAT MODE 6 When system stabilizes after more than 15 minutes measure temperature and take an average temperature 7 10 minutes later measure temperature again and check that the temperature does not change INDOOR UNIT OUTDOOR UNIT Wet and dry bulb Wet and dry bulb thermometers thermometers FRONT VIEW
40. r unit Three minutes later EMERGENCY OPERATION starts X1 After the outdoor fan starts running wait for 1 minutes or more before Measure the voltage between measuring the voltage each leading to the compressor output voltage values in the above table have the tolerance of 20 U BLK V WHT No LED indicator the inverter 1 Turn off power supply of the indoor stops due to over current and outdoor unit and disconnect V WHT W RED the connector CN 551 in the relay W RED U BLK Output voltage COOL 100V 58Hz HEAT 100V 58Hz Yes P C board Is voltage output x1 2 power supply to the outdoor Yes Replace the electronic unit and after 1 minutes or more No control P C board passed check the resistance lt 15 output balanced 9 o with the I P M P C board between the connector Tres CN551 pin 1 and pin 2 Turn off power supply of indoor and outdoor unit and measure the compressor winding resistance between the terminals No 00 2 Is there resistance of 0 270 to 0 340 between the each terminals Infinite Replace the compressor After 1 minutes has passed since the power supply of outdoor unit was turned off disconnect the connector 553 the noise filter P C board Return the lead wire of compressor to former and turn on power supply to indoor and outdoor
41. rcuit has changed Disuse of 2 way valve Disuse of capillary tube 43 x 2 x 500 Disuse of low pressure switch Disuse of suction pipe temperature thermistor 2 PART NAMES AND FUNCTIONS OUTDOOR UNIT MXZ 32SV Air inlet side m Model indication C Air outlet 3 INDOOR OUTDOOR CORRESPONDENCE TABLE NOTE MCFH 13NV SEH 1 6AR is equivalent to class 12 12000BTU SEH 2AR is equivalent to class 18 18000BTU OUTDOOR UNIT MXZ 32SV 1 Combination of the connectable indoor units 07 07 07409 07412 07418 094 09 09 12 09 18 12 12 12 18 18 18 07 07 07 07 07 09 07 07 12 07 07 18 07 09 09 07 09 12 07 09 18 07 12 12 07 12 18 07 18 18 09 09 09 09 09 12 09 09 18 09 12 12 09 12 18 09 18 18 12 12 12 12 12 18 07 07 07 07 07 07 07 09 07 07 07 12 07 07 07 18 07 07 09 09 07 07 09 12 07 07 09 18 07 07 12 12 07 07 12 18 07 09 09 09 07 09 09 12 07 09 09 18 07 09 12 12 09 09 09 09 09 09 09 12 09 09 09 18 09 09 12 12 There is no combination other than this table 4 INDOOR UNITS COMBINATION MXZ 32SV
42. re protection 1 High pressure protection control on heat mode Temperature of the main pipe temp thermistor in the indoor unit controls the operation frequency When temperature of the main pipe temp thermistor is approx 49 C the operation frequency is set at the current level When temperature of the main pipe temp thermistor is approx 52 the protection control decreases the frequency at the speed of 3Hz a minutes When temperature of the main pipe temp thermistor is approx 57 C the protection decreases the frequency at the speed of 4Hz a minute and changes the outdoor fan to Low Note Temperature of the pipe temp thermistor is different depending on the indoor unit Temperature of the pipe temp thermistor is 45 C or less the protection control is Released 2 High pressure protection control by high pressure switch H P S High pressure switch controls the operation frequency and outdoor fan motor Control status When high pressure switch is ON When discharge pipe pressure is 2 75 MPa or more Control details a When cooling or drying The protection control decreases the compressor frequency at the speed of 10Hz a minute The compressor operates continuously in min frequency according to a command to decrease more than the min level b When heating The protection control decreases the compressor frequency at the speed of 10Hz a minute The protection control changes the outdoor fan to Low Release sta
43. rol details gt LEV opening which adjusts to not operating indoor unit is considered to be 80 pulse lt Control finish status gt The control finishes either as follows However the LEV opening is considered to be 59 pulse When it passed 60 seconds since the control has started When the discharge temperature is 90 or less 11 7 Outdoor fan control Fan speed is switched according to a number of operating indoor unit and the compressor frequency Fan speed Hi Low Min Compressor frequency Max Relation between compressor frequency fan speed Indoor unit operation Fan speed Double Triple Quadruple Up 50Hz 50 Hz 50 Hz Down 45 Hz 45 Hz 45 Hz Up 45 Hz 40 Hz 40 Hz Down 40 Hz 35 Hz 35 Hz Note When operation fan speed of Low mode changes to VHi Hi mode by promoting those fan speeds respectively by 1 step after defrosting is operated This control is cleared when the compressor off When overheat protection of P C board temperature or fin temperature operates the outdoor fan speed is fixed to VHi mode regardless of compressor frequency Also when the overheat protection is cleared the fan speed is back to normal When the indoor coil thermistor is 57 C or more on HEAT operation fan speed is fixed to Low notch Or the indoor coil thermistor is 45 or less on HEAT operation fan speed is back to normal 11 8 Relation between main sensor and actuator Relation be
44. s at HI speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button flow speed HI i orany button on remote controller GInverter output frequency 58Hz ERR RN NEM E EA REN EARUM Gauge MPa Gauge 8 6 7 5 g o 5 3 34 5 5 5 J lb e 2 3 2 0 2 1 18 20 25 30 32 18 20 25 30 32 50 60 70 50 60 70 Ambient temperature C Ambient humidity Ambient temperature C Ambient humidity 2 HEAT operation amp Indoor DB C 20 0 Outdoor DB C 2 7 15 200 14 5 WB O 1 6 12 14 5 Q Set air flow to Hi speed Inverter output frequency is 40Hz Outdoor unit current A Ambient 3 12 13 class unit in single operation OUTDOOR MXZ 32SV unit of pressure has been changed to MPa on the international system of units SI unit system The converted score against the traditional unit system can be gotten according to the formula below 1 G 10 2 kgf cm2 G 1 COOL operation Both indoor and outdoor units are under the 777777 temperature humidity condition How to work fixed frequency operation Dry bulb temperature C Relative humidity Set switch to COOL switch is loc
45. stor abnormality temperature thermistor Contact of P C board connectors 26 Symptom Outdoor unit operates The compressor operates at reduced frequency Display Detecting method Detecting method Check points 28 Frequency drop current When the outdoor unit input current exceeds 22 5 A the compressor d8 protection operates at reduced frequency 99 49 Frequency drop by overload protection When the compressor load exceeds the specified value the compres sor operates at reduced frequency 41 87 Frequency drop high pres sure protection When indoor pipe temperature exceeds 55 during heating the pressor operates at reduced frequency Frequency drop by defrosting in cooling When the indoor pipe temperature falls to 6 or below during cooling the compressor operates at reduced frequency d6 d6 Frequency drop by discharge temperature protection When the discharge temperature exceeds 110 C the compressor oper ates at reduced frequency These symptoms do not mean any abnormality of the product but check the following points Air filter clogging Amount of gas Short cycle of indoor outdoor air flow d3 Frequency drop by high pres sure switch protection When the high pressure exceeds 2 75MPa 28 kgf cm G the com pressor operates at reduced frequency In addition the fan speed Amount of gas Outdoor u
46. t Transistor module I gt Fin temperature thermistor RT65 Accumulator Indoor Unit lt Indoor Unit or ERED N Indoor Unit i B Indoor Unit A Indoor Unit zr Indoor Unit 22772 A H P S 63H2 Gore Discharge temperature d thermistor RT61 M 63H1 Gas pipe temperature thermistor RT66 67 68 69 Evaporation temperature thermistor RT63 a fan motor MF61 Defrost thermistor RT62 11 control Linear expansion valve LEV is controlled by Thermostat ON commands given from each unit Indoor unit status Stop of all indoor unit ing before stop 500 pulse in 15 minutes When outdoor unit is operating COOL 5 pulse full closed Some e Ang HEAT 59 pulse slightly opened Thermostat OFF in When the outdoor unit operation When the other indoor unit operate 5 pulse COOL or DRY mode When outdoor unit stops When the other indoor unit stops or thermo off Maintain LEV opening before stop 500 pulse in 15 minutes LEV opening for each indoor unit is determined by adding adjustment in accordance with the number of operating unit and the capacity class to standard opening based on the operation frequency Ex Opening 130 pulse in standard opening 1 Minimum 80 pulse Maximum 205 pulse Capaci
47. t 07 09 12 18 lt Correction gt COOL DRY HEAT Suction super heat MIN gas pipe temperature thermistor Evaporation temperature thermistor Each correction 1 Each gas pipe temperature thermistor Evaporation temperature thermistor Main pipe temperature thermistor sub pipe temperature thermistor Discharge temperature ex ex e 1 Perform this when number of operation units is 2units or more 2 When the correction opening of suction super heat is 0 correct the LEV opening by dischaege temperature 1 LEV opening correction by suction super heat COOL DRY Suction super heat Minimum gas pipe temperature Evaporation temperature When COOL and DRY correct the LEV openings corrected from the table below LEV opening correction pulse more mania 9 Suction superheat S H 101012 _ Goles 20 2 Separate COOL DRY When number of operation unit is 2 units more a Correction by the separate super heat Correct the LEV separately by temperature difference between each gas pipe temperature thermistor and evaporator temperature thermistor Calculate each super heat of the unit from the expression below Super heat Gas pipe temperature thermistor Evaporation temperature thermistor Select a minimum super heat from among them Correct an each LEV is corrected opening is corrected by difference between each super
48. the front panel two screws See Photo 1 2 Disconnect the connector CN911 on the outdoor controller board 3 Remove the propeller 4 Remove the fan motor 3 Removing the 4 way valve 1 Remove the screws of the top panel and remove it See Photo 1 2 Remove the service panel rear panel and connect cover panel Release refrigerant gas 3 Remove the electrical parts See Photo 2 4 Detach the brazed joint of 4 way valve and pipe See Photo 4 Photo 4 4 Removing the linear expansion valve 1 Remove the service panel See Photo 1 Gas release is not required if the unit is pumped down 2 Remove the coil of linear expansion valve 3 Detach the brazed joint of linear expansion valve and pipe Photo 5 Linear expansion valves LEV coils 37 OPERATING PROCEDURE PHOTOS 5 Removing the reactor 1 Remove the five screws of the top panel and remove it See photo 6 Photo 1 2 Disconnect the reactor lead wire Reactor 3 Remove the two screws of the reactor and take it out 1111110027 38 14 PARTS LIST 14 1 OUTDOOR UNIT FUNCTIONAL PARTS MXZ 32SV E gt 15 11 Part numbers that are circled are not shown in the illustration Symbol Q ty unit No Parts No Parts Name in Wiring R
49. the indoor unit is flashing on and off to indicate an abnormality To make sure check how many times the abnormality indication is flashing on and off before starting service work 2 If the electronic control P C board is supposed to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 3 When troubleshooting refer to the flow chart on page 123 124 and the check table on page 125 127 12 2 Instruction of troubleshooting Check the indoor unit with referring to the indoor unit service manual and confirm that there is any problem in the indoor unit Then check the outdoor unit with referring to this page Operation start Check the outdoor unit LED indicator Check of power supply See page 29 uu Display other than 22 Refer to indicator list See page 26 27 Indoor unit Cool or HEAT e When cooling heat When cooling When heating When cooling serial signal opereation only exchanger of dew drops in the room doed not get room does not error Check of non operating indoor non operating warm cool Check of R V coil unit frosts indoor unit Check of Check of serial signa See page 30 When heating non Check of mis inverter compressor See page 29 operating indoor unit piping See page 31 compressor gets warm Check
50. tus When high pressure switch is OFF When discharge pipe pressure is 2 35 MPa or more Or the compressor stops 11 5 Discharge temperature protection control This protection controls the compressor ON OFF and operation frequency according to temperature of the discharge temp thermistor 1 Compressor ON OFF When temperature of the discharge temp thermistor exceeds 116 C the control stops the compressor When temperature of the discharge temp thermistor 15 80 or less the controls starts the compressor 2 Compressor operation frequency When temperature of the discharge temp thermistor is expected to be higher than 116 C the control decreases 12Hz from the current frequency When temperature of the discharge temp thermistor is expected to be higher than 111 C and less than 116 C the control decreases 6Hz from the current frequency When temperature of the discharge temp thermistor is expected to be higher than 104 C and less than 111 C the control is set at the current frequency 23 11 6 Refrigerant recovery control heating lt Control status gt The control performs when the following status are satisfied everything When there is 1 unit or more not operating indoor unit on heat operation Excluding thermo OFF e When discharge temperature becomes 107 C or more When it passed 60 minutes or more since the operation has started or the last refrigerant recovery has controlled lt Cont
51. tween main sensor and actuator Actuator LEV Outdoor Reversing Sensor Purpose Compressor Discharge temperature thermistor Indoor pipe temperature Defrosting thermistor Protection Protection Defrost thermistor Defrosting Evaporation temperature thermistor Gas pipe temperature thermistor High pressure switch Fin temperature thermistor Control Control Protection Protection Capacity code Control 24 12 TROUBLESHOOTING 12 1 Cautions troubleshooting 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care the following during servicing 1 Before servicing the air conditioner be sure to first turn off the remote controller to stop the unit and then after con firming the horizontal vane is closed turn off the breaker and or disconnect the power plug 2 Be sure to unplug the power cord before removing the front panel the cabinet the top panel and the electronic con trol P C board 3 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 4 When connecting or disconnecting the connectors hold the housing of the connector DO pull the lead wires Lead wiring Housing point 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp on
52. ty code 4 at 1 unit operation Capacity code 1 at 4 unit operation After starting operation adjustment in accordance with intake super heat discharge temperature is included in standard opening 1 Note LEV opening in each frequency at DRY operation and COOL operation is the same However velocity and compressor operation frequency controls are different See 11 2 Operational frequency range As far as the indoor unit velocity control goes refer to DRY operation in MICROPROCESSOR CONTROL in the indoor unit service manual When the outdoor unit operates When the other indoor unit operates 59 pulse Thermostat OFF in HEAT mode When the outdoor unit stops When the other indoor unit stops or thermo off Maintain LEV opening before stop 500 pulse in 15 minutes Thermostat ON in COOL or DRY mode opening for each indoor unit is determined by adding adjustment in accordance with the number of operating unit and the capacity class to standard opening based on the operation frequency Ex Opening 120 pulse in standard opening 1 Minimum 70 pulse Maximum 165 pulse Capacity code 4 at 1 unit operation Capacity code 1 at 4 unit operation After starting operation opening becomes the one that adjustment in accordance with discharge temperature was added to basic opening 1 Thermostat ON in HEAT mode x1 LEV opening when the outdoor unit operating Upper limit 500 Lower limit 59 Determi
53. unit Three minutes later EMERGENCY OPERATION starts i Clarify the causes by counting time until the inverter stops 010 10 seconds compressor rare short 00 Check the resistance HPS 63H2 10 to 60 seconds compressor lock Y Infinite 60 seconds to 5minutes refrigerant circuit defective 5 minutes or more normal Replace the Replace the relay P C board HPS 63H2 31 Check of thermistor Disconnect the connector in the electronic control P C board see below table and Abnormal the thermistor measure the resistance of thermistor to check whether the thermistor is normal or not Normal Reconnect connector CN661 CN662 and CN663 and disconnect the lead wire leading to the compressor Turn on power supply to the indoor and outdoor unit Three minutes later EMERGENCY OPERATION starts Does thermistor operate 10 minutes or more though the No Replace the electronic thermistor abnormality is not displayed control P C board Yves Connector Pin No Defrost thermistor Between CN661 1 and pin2 Discharge temperature thermistor Between CN661 pin3 and pin4 Evaporation temperature thermistor Between CN661 pin5 and pin6 Gas pipe temperature thermistor Unit B Between CN662 pin3 and pin4 Gas pipe temperature thermistor Unit C Between CN662 5 and Gas pipe temperature thermistor Unit D Between CN662 pin7 and 8
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