Table of Contents
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SPLIT-TYPE AIR CONDITIONERS
OUTDOOR UNIT
SERVICE MANUAL
Models
MXZ-32SV -
MXZ-32SV -
This manual describes technical data of outdoor unit.
For indoor unit, refer to the service manuals No. OB229, OB227, OB252, OB212, OB239 and OC165.
Revision C:
• Service part of thermistor set for MXZ-32SV -
has been added.
Please void OB254 REVISED EDITION-B.
E1
E2
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
CORRESPONDENCE TABLE ···························3
4. INDOOR UNITS COMBINATION ·······················4
5. SPECIFICATION·················································8
6. NOISE CRITERIA CURVES ······························ 9
7. OUTLINES AND DIMENSIONS ······················ 10
8. WIRING DIAGRAM···········································11
9. REFRIGERANT SYSTEM DIAGRAM ··············12
10. PERFORMANCE CURVES ······························13
11. MICROPROCESSOR CONTROL·····················19
12. TROUBLESHOOTING······································25
13. DISASSEMBLY INSTRUCTIONS·····················37
14. PARTS LIST······················································40
15. OPTIONAL PARTS···········································43
E2
No. OB254
REVISED EDITION-C
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Table of Contents
Troubleshooting
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Related Manuals for Mitsubishi Electric MXZ-32SV-E1
Summary of Contents for Mitsubishi Electric MXZ-32SV-E1
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Page 1: Table Of Contents
Revision C: • Service part of thermistor set for MXZ-32SV - has been added. Please void OB254 REVISED EDITION-B. SPLIT-TYPE AIR CONDITIONERS OUTDOOR UNIT No. OB254 REVISED EDITION-C SERVICE MANUAL Models MXZ-32SV - MXZ-32SV - CONTENTS 1. TECHNICAL CHANGES ····································2 2. -
Page 2: Technical Changes
Revision A: • MXZ-32SV - has been added. Revision B: • “Check of HPS” and PARTS LIST have been corrected. Revision C: • Service part of thermistor set for MXZ-32SV - has been added. TECHNICAL CHANGES ➔ MXZ-32SV - MXZ-32RV - 1. -
Page 3: Indoor/Outdoor Correspondence Table
INDOOR / OUTDOOR CORRESPONDENCE TABLE NOTE: SLH-1AR is equivalent to class 09 (9000BTU). MCFH-13NV, SEH-1.6AR, SLH-1.6AR is equivalent to class 12 (12000BTU). MCFH-18NV, SEH-2AR,SLH-2AR is equivalent to class 18 (18000BTU). OUTDOOR UNIT MXZ-32SV- MXZ-32SV- E1 , 07+07 07+09 07+12 07+18 09+09 09+12 09+18... -
Page 4: Indoor Units Combination
INDOOR UNITS COMBINATION MXZ-32SV - MXZ-32SV - E1 , NOTE: Electrical data is for outdoor unit only. Cooling capacity (kW) Outdoor unit Current Power Indoor units power consumption factor combination Total Unit A Unit B Unit C Unit D (kW) 220V 240V 0.75... - Page 5 NOTE: Electrical data is for outdoor unit only. Cooling capacity (kW) Outdoor unit Current Power Indoor units power consumption factor combination Total Unit A Unit B Unit C Unit D (kW) 220V 240V 2.98 15.05 13.80 09+09+09 2.67 2.67 2.67 (2.4-9.0) (0.70-4.27) 2.98...
- Page 6 NOTE: Electrical data is for outdoor unit only. Heating capacity (kW) Outdoor unit Current Power Indoor units power consumption factor combination Total Unit A Unit B Unit C Unit D (kW) 220V 240V 1.13 5.71 5.23 (0.9-4.1) (0.27-1.60) 1.32 6.67 6.11 (0.9-4.8) (0.27-1.70)
- Page 7 NOTE: Electrical data is for outdoor unit only. Heating capacity (kW) Outdoor unit Current Power Indoor units power consumption factor combination Total Unit A Unit B Unit C Unit D (kW) 220V 240V 2.78 09+09+09 14.04 12.87 (2.1-11.6) (0.52-3.50) 2.78 09+09+12 2.65 2.65...
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Page 8: Specification
SPECIFICATION Outdoor model MXZ-32SV - MXZ-32SV - Single phase Outdoor unit power supply 220-240V,50Hz Indoor units number 2 to 4 Indoor units total capacity (Connectable) Total model name 42 indoor units total capacity (Simultaneous operation) Total model name 42 Piping total length Max. -
Page 9: Noise Criteria Curves
NOISE CRITERIA CURVES SPL(dB LINE NOTCH COOL(220V) COOL(240V) HEAT(220V) HEAT(240V) MXZ-32SV - Test conditions. Cooling :DB35: WB24: MXZ-32SV - Heating :DB 7: WB 6: NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz... -
Page 10: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit: mm OUTDOOR UNIT MXZ-32SV - MXZ-32SV - 2-U-shape notched holes (Base bolt M10) Rubber cushion Air in Veranda Base Air in Air out 2-12 ✕ 36 Oval hole (Base bolt M10) 9.52 (flared) 3/8 (C , D unit) 12.7 (flared) 1/2 (A , B unit) Indoor and Handle for... -
Page 11: Wiring Diagram
WIRING DIAGRAM OUTDOOR UNIT MXZ-32SV- DS62 DS61 REDR NOISE FILTER P.C.BOARD GRN/YLW POWER SUPPLY 63H2 ~/N 220-240V 50Hz LD62 LD61 F911 RELAY P.C. BOARD CIRCUIT BREAKER T801 TAB64 (1A) CN913 CN720 TAB65 CN901 CN902 INDOOR UNIT (A) CT62 1 2 3 4 5 6 INDOOR TAB66 UNIT (B) -
Page 12: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MXZ-32SV - Unit:mm MXZ-32SV - Compressor High pressure Discharge Refrigerant flow in cooling switch 1 temperature Refrigerant flow in heating High pressure thermistor switch 2 Reversing valve coil Capillary tube Accumulator heating ON Unit D gas pipe temperature thermistor separator [2.5✕... -
Page 13: Performance Curves
PERFORMANCE CURVES The standard specifications apply only to the operation of the air conditioner under normal conditions, since operating condi- tions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve. - Page 14 10-2. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY (OUTDOOR UNIT:MXZ-32SV) 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 <COOL>Capacity <COOL>Total input <HEAT>Capacity...
- Page 15 10-3. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT CURVE 1. 07-class unit in 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(MPa •...
- Page 16 2. 09-class unit in 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(MPa • G) =10.2(kgf/f f •...
- Page 17 3. 12-class unit in 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(MPa • G) =10.2(kgf/f f •...
- Page 18 4. 18-class unit in 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(MPa • G) =10.2(kgf/f f •...
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Page 19: Microprocessor Control
MICROPROCESSOR CONTROL INVERTER MULTI SYSTEM CONTROL MXZ-32SV - MXZ-32SV - Output signal Input signal Compressor Compressor Compressor power primary secondary factor current current Indoor unit microprocessor Outdoor unit control microprocessor Drive SSR61 circuit Transistor module Fin temperature thermistor RT65 Accumulator Comp. - Page 20 11-1. LEV CONTROL Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit. Indoor unit status LEV opening Stop of all indoor unit Opening before stop ➝ 500 pulse in 15 minutes When outdoor unit is COOL : 5 pulse (fully closed) operating, some indoor unit HEAT : 59 pulse (slightly opened)
- Page 21 <Correction> COOL HEAT 1 Suction superheat (MIN gas pipe temperature thermistor - Evaporation temperature thermistor) • • 2 Each correction w 1 • (Each gas pipe temperature thermistor - Evaporation temperature thermistor) • (Main pipe temperature thermistor - sub pipe temperature thermistor) •...
- Page 22 (3) LEV opening correction by discharge temperature When LEV correction output is 0 pulse by the suction superheat 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.
- Page 23 11-3. HEAT DEFROSTING CONTROL (1) Conditions to enter defrosting mode 1. When temperature of defrosting thermistor is -3: or less. 2.When specified non-defrosting time is counted in the control P.C.board. (Total time of compressor operating) Going to defrosting mode at both condition of 1 and 2. (2) Defrosting operation 1.
- Page 24 11-6. REFRIGERANT RECOVERY CONTROL ON HEATING <Control status> 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) • When discharge temperature becomes 107: or more. •...
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Page 25: Troubleshooting
TROUBLESHOOTING 12-1. CAUTIONS ON 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. -
Page 26: Troubleshooting Check Table
12-3. TROUBLESHOOTING CHECK TABLE Note . LED indicates "00" in the normal status. 7-segment LED display Error mode 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 “... - Page 27 Symptom Outdoor unit operates. (The compressor operates at reduced frequency.) Display Detecting method Detecting method Check points d d 8 8 Frequency drop by current When the outdoor unit input current exceeds 22.5 A, the compressor protection operates at reduced frequency. (d8) d d 9 9 Frequency drop by overload...
- Page 28 12-4. TROUBLE CRITERION OF MAIN 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 5kΩ ~ 55kΩ Open or short-circuited Measure the resistance using a tester, after warming up the thermistor by holding by hand. (Part temperature : 20°C ~40°C) Discharge temperature thermistor...
- Page 29 12-5. TROUBLESHOOTING FLOW Outdoor unit does not operate. (LED display: display OFF) A A Check of power supply Start Check the connecting of main circuit parts and connectors (CN501: I.P.M P. C. board, CN 801: Electronic control P. C. board, CN554: relay P. C. board). Turn on power supply.
- Page 30 The cooling operation or heating operation does not operate. (LED display: 0 0 0 0 ) C C Check of R. V. coil • When heating operation does not work. Start 1. Disconnect the lead wire leading to the compressor. 2.
- Page 31 • When cooling, heat exchanger of non-operating indoor unit frosts. • When heating, non-operating indoor unit get warm. (LED display: 0 0 0 0 , p p 1 1 ) D D Check of LEV Start Turn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely.
- Page 32 • When thermistor is abnormal. F F Check of thermistor Start Abnormal Disconnect the connector in the electronic control P. C. board (see below table), and Replace the thermistor. measure the resistance of thermistor to check whether the thermistor is normal or not. Normal Reconnect the connectors (CN661, CN662 and CN663) and disconnect the lead wire leading to the compressor.
- Page 33 • When the operation frequency does not go up from lowest frequency. H H Check of HPS Start 1. Disconnect the connector CN722 in the electronic control P. C. board. 2. Check the resistance of HPS after 1 minute has passed since the outdoor unit power supply was turned off. Infinity Check the resistance between Replace HPS (63H1).
- Page 34 12-6. TEST POINT DIAGRAM AND VOLTAGE MXZ-32SV MXZ-32SV Discharge temperature thermistor Gas pipe temperature thermistor Evaporation temperature thermistor Electronic control P.C.board Defrost temperature thermistor Temperature(:) Defrost temperature thermistor 2.5~4.0V DC Discharge temperature thermistor 0.3~0.6V DC Evaporation temperature thermistor Temperature(:) 2.5~4.0V DC Outdoor fan ON 12V DC Outdoor fan Lo 12V DC Outdoor fan Me 12V DC...
- Page 35 Noise filter P.C.board MXZ-32SV 220V-240V AC OUTDOOR FAN OUTPUT 220V-240V AC 220V-240V AC INPUT REVERSING VALVE 220V-240V AC MXZ-32SV 220V-240V AC OUTDOOR FAN OUTPUT 220V-240V AC FUSE 3.15A VARISTOR 230V AC INPUT REVERSING VALVE 230V AC...
- Page 36 I.P.M P.C.board MXZ-32SV MXZ-32SV 12V DC 12V DC 320V DC Relay P.C.board MXZ-32SV MXZ-32SV 12V DC High pressure switch 12V DC Short...
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Page 37: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS 13-1. MXZ-32SV - , MXZ-32SV - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1.Removing the compressor Photo 1 (1)Remove the screws of the service panel, and remove it. Release refrigerant gas. (2)Remove the screws of the top panel, and remove it. Top panel (3)Remove the screws of the front panel, and remove it. - Page 38 OPERATING PROCEDURE PHOTOS 2.Removing the fan motor (1)Remove the top panel (five screws),the service panel (four screws), and the front panel (two screws). (See Photo 1.) (2)Disconnect the fan motor connector. (3)Remove the propeller. (4)Remove the fan motor. 3.Removing the 4-way valve Photo 4 (1)Remove the screws of the top panel, and remove it.
- Page 39 OPERATING PROCEDURE PHOTOS 5.Removing the reactor (1)Remove the screws of the top panel, and remove it. Photo 6 (See Photo 1.) (2)Disconnect the reactor lead wire. Reactor (3)Remove the screws of the reactor, and take it out.
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Page 40: Parts List
PARTS LIST 14-1. OUTDOOR UNIT FUNCTIONAL PARTS MXZ-32SV - MXZ-32SV - Part numbers that are circled are not shown in the illustration. Symbol Q'ty / unit Parts No. Parts Name in Wiring Remarks E1 MXZ-32SV- E2 MXZ-32SV- Diagram M21 17A 501 PROPELLER FAN T2W E40 301 MF61... - Page 41 14-2. OUTDOOR UNIT STRUCTURAL PARTS MXZ-32SV - MXZ-32SV - Part numbers that are circled are not shown in the illustration. Symbol Q'ty / unit Parts No. Parts Name in Wiring Remarks E1 MXZ-32SV- E2 MXZ-32SV- Diagram M21 AS2 232 FRONT PANEL M21 17A 245 SERVICE PANEL T92 500 800...
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Page 42: Accessory Parts
14-3. ACCESSORY PARTS MXZ-32SV - MXZ-32SV - Symbol Q'ty / unit Parts No. Parts Name in Wiring MXZ-32SV Remarks Diagram DRAIN SOCKET O1 T2W E59 704 DRAIN SOCKET ASSEMBLY DRAIN CAP O2... -
Page 43: Optional Parts
OPTIONAL PARTS 15-1. DIFFERENT-DIAMETER PIPE Unit : mm (inch) Connected pipes Length Length Length MXZ-32SV Model name Model code diameter (mm) {9.52 {12.7 {9.52 — {12.7 MAC-454JP 51H-454 (3/8) (1/2) (3/8) (1/2) For different- {12.7 {9.52 {12.7 — {9.52 diameter MAC-455JP 51H-455 (1/2) - Page 44 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2000 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jun. 2010. No.OB254 REVISED EDITION-C 6 Distributed in Jun. 2006. No.OB254 REVISED EDITION-B 7 Distributed in Jan. 2003. No.OB254 REVISED EDITION-A 7 Reprinted in Feb.
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