Mitsubishi Electric MXZ-2A20NA-1 Service Manual
  1. Manuals
  2. Brands
  3. Mitsubishi Electric Manuals
  4. Air Conditioner
  5. MXZ-2A20NA-1
  6. Service manual
Mitsubishi Electric MXZ-2A20NA-1 Service Manual

Mitsubishi Electric MXZ-2A20NA-1 Service Manual

Outdoor unit inverter-controlled multi system type
Hide thumbs Also See for MXZ-2A20NA-1:
Table of Contents

Advertisement

Quick Links

Download this manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
OUTDOOR UNIT
SERVICE MANUAL
Inverter-controlled multi system type
Models
MXZ-2A20NA
MXZ-2A20NA -
MXZ-3A30NA
MXZ-3A30NA -
NOTE:
• This service manual describes technical
data of the outdoor units.
• RoHS compliant products have <G> mark
on the spec name plate.
For servicing of RoHS compliant products,
refer to the RoHS Parts List.
1
1
MXZ-2A20NA
MXZ-2A20NA -
1
9700058
Revision B:
• MXZ-2A20NA -
have been added.
Please void OB444 REVISED EDITION-A.
HFC
utilized
R410A
Indoor unit service manual
MSZ-A·NA Series (OB450)
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
3. INDOOR UNITS COMBINATION ·······················7
4. SPECIFICATION···············································10
5. OUTLINES AND DIMENSIONS ·······················12
6. WIRING DIAGRAM ··········································15
7. REFRIGERANT SYSTEM DIAGRAM ··············19
8. DATA·································································23
9. ACTUATOR CONTROL····································38
10. SERVICE FUNCTIONS·····································38
11. TROUBLESHOOTING ······································40
12. DISASSEMBLY INSTRUCTIONS·····················57
13. PARTS LIST······················································66
14. RoHS PARTS LIST···········································74
15. OPTIONAL PARTS···········································86
The Slim Line.
From Mitsubishi Electric.
33223
and MXZ-3A30NA -
1
1
No. OB444
REVISED EDITION-B
TM

Advertisement

Table of Contents
loading

Related Manuals for Mitsubishi Electric MXZ-2A20NA-1

Summary of Contents for Mitsubishi Electric MXZ-2A20NA-1

  • Page 1: Table Of Contents

    MXZ-2A20NA - 15. OPTIONAL PARTS···········································86 NOTE: The Slim Line. • This service manual describes technical From Mitsubishi Electric. data of the outdoor units. • RoHS compliant products have <G> mark on the spec name plate. For servicing of RoHS compliant products, refer to the RoHS Parts List.

  • Page 2: Technical Changes

    Revision A: • RoHS PARTS LIST has been added. Revision B: • MXZ-2A20NA - and MXZ-3A30NA - have been added. TECHNICAL CHANGES MXZ-2A20NA New model MXZ-30TN2 MXZ-3A30NA 1. Combinations of connectable indoor units have been increased. 2. Capacity class of connectable indoor units have been made larger. 3.
  • Page 3 INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT • This room air conditioner adopts HFC refrigerant (R410A) which never destroys the ozone layer. • Pay particular attention to the following points, though the basic installation procedure is same as that for R22 air conditioners.
  • Page 4 New Specification Current Specification The incompatible refrigeration oil easily separates from Since refrigerant and refrigeration oil are compatible, refrigerant and is in the upper layer inside the suction muffler. refrigeration oil goes back to the compressor through the Raising position of the oil back hole enables to back the lower position oil back hole.
  • Page 5 2.Refrigerant piping 1 Specifications Use the copper or copper-alloy seamless pipes for refrigerant that meet the following specifications. Outside diameter Wall thickness Insulation material (inch) (inch) 0.0315 0.0315 Heat resisting foam plastic 0.0315 Specific gravity 0.045 Thickness 0.315 inch 0.0394 2 Flaring work and flare nut Flaring work for R410A pipe differs from that for R22 pipe.

  • Page 6: Part Names And Functions

    PART NAMES AND FUNCTIONS MXZ-2A20NA MXZ-2A20NA - Air inlet (Back and side) Air outlet Drain outlet MXZ-3A30NA Air inlet (Back and side) Air outlet Drain outlet MXZ-3A30NA - Air inlet (Back and side) Air outlet Drain outlet...

  • Page 7: Indoor Units Combination

    INDOOR UNITS COMBINATION MXZ-2A20NA MXZ-2A20NA - Cooling capacity (BTU/h) Current Power Indoor units Power consumption factor combination Total Unit A Unit B 208V 230V 9,000 9,000 – 3.69 3.34 (5,400 ~ 9,000) (490 ~ 730) 12,000 12,000 – 5.01 4.53 (5,400 ~ 12,000) ( 490 ~ 990) 15,000...
  • Page 8 MXZ-3A30NA MXZ-3A30NA - Cooling capacity (BTU/h) Current Power Power consumption Indoor units factor combination Unit A Unit B Unit C Total 208V 230V 9,000 9,000 – – 4.05 3.66 (7,200 ~ 9,000) (650 ~ 800) 12,000 1,000 12,000 – – 5.06 4.58 (7,200 ~ 12,000)
  • Page 9 Heating capacity (BTU/h) Current Power Power consumption Indoor units factor combination Total Unit A Unit B Unit C 208V 230V 10,900 1,100 10,900 5.57 5.03 – – (8,600 ~ 15,400) (780 ~1,520) 13,600 1,380 13,600 – – 6.98 6.32 (8,600 ~ 16,400) (780 ~ 1,600) 18,000 1,940...

  • Page 10: Specification

    SPECIFICATION Item Model MXZ-2A20NA MXZ-2A20NA - Cooling 20,000/ (7,800 ~ 20,000) Btu/h Capacity Heating 47 22,000/ (8,500 ~ 22,000) Btu/h Heating 17 Btu/h 14,500 Cooling 2,150/ (630 ~ 2,150) Power Heating 47 1,780/ (520 ~ 1,780) consumption Heating 17 1,500 (1,500) [SEER] Cooling 9.3 [ 15 ]...
  • Page 11 Item Model MXZ-3A30NA MXZ-3A30NA - Cooling 28,400/ (12,600 ~ 28,400) Btu/h Capacity Heating 47 28,600/ (11,400 ~ 36,000) Btu/h Heating 17 Btu/h 18,800 Cooling 3,250/ (1,000 ~ 3,250) Power Heating 47 2,180/ (740 ~ 2,880) consumption Heating 17 2,120 8.7 [ 16.0 ] [SEER] Cooling HSPF IV (V)

  • Page 12: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: inch MXZ-2A20NA MXZ-2A20NA - REQUIRED SPACE Open as a rule More than 19.69 in. if the front and both sides are 6-9/16" 19-11/16" 6-21/32" open 9-3/16" 11-11/32" 2-1/2" More than 3.94 in. More than 3.94 in. More than 7.87 in.
  • Page 13 MXZ-3A30NA Unit: inch REQUIRED SPACE Open as a rule More than 19.69 in. if the front and both sides are open 7-7/8" 19-11/16" (7-7/8") More than 3.94 in. 9-27/32" More than 3.94 in. More than 7.87 in. 10-5/8" 1-3/8" if there are obstacles to both 2-U-shape notched holes sides...
  • Page 14 MXZ-3A30NA - Unit: inch 7-7/8" 19-11/16" 7-7/8" 9-27/32" 10-5/8" 2-U Shaped notched hole 1-3/8" (Base bolt M10) Air in Air in Drain hole 3-[1-5/16" Air out 2-(15/32"o1-13/32") Oval hole (Base bolt M10) 3-[7/8"Punched hole (Connect wiring hole) 1-3/16" 12-19/32" 13/32" 35-7/16"...

  • Page 15: Wiring Diagram

    WIRING DIAGRAM MXZ-2A20NA...
  • Page 16 MXZ-2A20NA -...
  • Page 17 MXZ-3A30NA...
  • Page 18 MXZ-3A30NA -...

  • Page 19: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Unit:mm MXZ-2A20NA MXZ-2A20NA - Service port Compressor R.V. coil Discharge Service temperature Refrigerant flow in cooling port thermistor RT62 Refrigerant flow in heating Oil separator Capillary tube Unit B gas pipe O.D.0.98 I.D.0.02 39.37 temperature thermistor Ball valve with Indoor unit service port 4-way valve...
  • Page 20 Operating Range MXZ-2A20NA MXZ-2A20NA - Indoor intake air temperature Outdoor intake air temperature Maximum 95˚FDB, 71˚FWB 115˚FDB Cooling Minimum 67˚FDB, 57˚FWB 14˚FDB Maximum 80˚FDB, 67˚FWB 75˚FDB, 65˚FWB Heating Minimum 70˚FDB, 60˚FWB 14˚FDB, 12˚FWB MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION MXZ-2A20NA MXZ-2A20NA - Piping length each indoor unit (a, b)
  • Page 21 MXZ-3A30NA Unit:mm Service port Service Compressor R.V. coil port Discharge High-pressure Refrigerant flow in cooling temperature switch Refrigerant flow in heating thermistor RT62 Oil separator Capillary tube O.D.0.10 I.D.0.02 39.37 Unit C gas pipe Ball valve with temperature thermistor Indoor unit service port 4-way valve Unit B gas pipe...
  • Page 22 Operating Range MXZ-3A30NA MXZ-3A30NA - Indoor intake air temperature Outdoor intake air temperature Maximum 95˚FDB, 71˚FWB 115˚FDB Cooling Minimum 67˚FDB, 57˚FWB 14˚FDB Maximum 80˚FDB, 67˚FWB 75˚FDB, 65˚FWB Heating Minimum 70˚FDB, 60˚FWB 14˚FDB, 12˚FWB MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION MXZ-3A30NA MXZ-3A30NA - Piping length each indoor unit (a, b, c) 82ft.

  • Page 23: Data

    DATA MXZ-2A20NA MXZ-2A20NA - Model Item Cooling Unit Heating 20,000 Capacity Btu / h 22,000 Total – — – Input 2.15 1.78 MXZ-2A20NA MXZ-2A20NA - Outdoor unit Power supply (V, phase, Hz) 208/230, 1, 60 Electrical circuit Input 2.113 1.743 Comp.
  • Page 24 Model MXZ-3A30NA MXZ-3A30NA - Item Unit Cooling Heating Capacity Btu / h 28,400 28,600 Total — – – Input 3.25 2.18 Outdoor unit MXZ-3A30NA MXZ-3A30NA - Power supply (V, phase, Hz) 208/230, 1, 60 Electrical Input 3.197 2.127 circuit Comp. current (208/230V) 15.45/13.97 10.15/9.18 Fan motor current (208/230V)
  • Page 25 8-1. OPERATING RANGE (1) POWER SUPPLY Rating Guaranteed Voltage Model MXZ-2A20NA Min. 198V 208V 230V Max. 253V MXZ-2A20NA - Outdoor unit 208/230V 60Hz 1[ MXZ-3A30NA MXZ-3A30NA - (2) OPERATION MXZ-2A20NA MXZ-2A20NA - Intake air Indoor Outdoor temperature Function Condition DB (˚F) WB (˚F) DB (˚F) WB (˚F)
  • Page 26 MXZ-3A30NA MXZ-3A30NA - Intake air Indoor Outdoor temperature Function Condition DB (˚F) WB (˚F) DB (˚F) WB (˚F) "A" Cooling Steady State (75) at rated compressor Speed "B-2" Cooling Steady State (65) at rated compressor Speed "B-1" Cooling Steady State Cooling (65) at minimum compressor Speed...
  • Page 27 8-2. CAPACITY AND THE INPUT CURVES MXZ-2A20NA MXZ-2A20NA 11.1 10.2 24.0 26.1 31.9 22.2 24.1 29.5 20.3 22.1 27.0 18.5 20.0 24.6 16.6 18.0 22.1 14.8 16.0 19.7 12.9 14.0 17.2 11.1 12.0 14.7 Outdoor intake air Wet-bulb temperature (-F) Outdoor intake air Wet-bulb temperature (-F) NOTE:The above broken lines are for the heating operation without any frost and defrost operation.
  • Page 28 8-3. Capacity and input correction by means of inverter output frequency (OUTDOOR UNIT : MXZ-2A20NA MXZ-2A20NA - 1. 09-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 2. 12-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Total input <HEAT>Capacity...
  • Page 29 (OUTDOOR UNIT:MXZ-3A30NA MXZ-3A30NA - 1. 09-class unit in single operation <COOL>Total input <COOL>Capacity <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 2. 12-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 3. 15-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity...
  • Page 30 8-4. Outdoor low pressure and outdoor unit current 1. 09-class unit in single operation (OUTDOOR UNIT : MXZ-2A20NA MXZ-2A20NA - (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> 2Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- 3Inverter output frequency : 33Hz ed on indoor unit.
  • Page 31 2. 12-class unit in single operation (OUTDOOR UNIT : MXZ-2A20NA MXZ-2A20NA - (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> 2Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- 3Inverter output frequency : 33Hz ed on indoor unit.
  • Page 32 3. 15-class unit in single operation (OUTDOOR UNIT : MXZ-2A20NA MXZ-2A20NA - (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> 2Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- 3Inverter output frequency : 33Hz ed on indoor unit.
  • Page 33 4. 09-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> 2Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- 3Inverter output frequency : 33Hz ed on indoor unit.
  • Page 34 5. 12-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> 2Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- 3Inverter output frequency : 33Hz ed on indoor unit.
  • Page 35 6. 15-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> 2Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- 3Inverter output frequency : 33Hz ed on indoor unit.
  • Page 36 7. 17-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - (1) COOL operation 1Data is based on the condition of indoor humidity 50% 2Air flow speed : High <How to work fixed-frequency operation> 3Inverter output frequency : 33Hz 1.Set emergency switch to COOL or HEAT.The switch is locat- ed on indoor unit.
  • Page 37 8. 24-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - (1) COOL operation 1Data is based on the condition of indoor humidity 50% 2Air flow speed : High <How to work fixed-frequency operation> 1.Set emergency switch to COOL or HEAT.The switch is locat- 3Inverter output frequency : 33Hz ed on indoor unit.

  • Page 38: Actuator Control

    ACTUATOR CONTROL MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - Relation between main sensor and actuator Actuator Purpose Sensor Outdoor 4-way Compressor fan motor valve Discharge temperature thermistor Protection Indoor pipe temperature thermistor Defrosting Protection Defrost thermistor Defrosting Gas pipe temperature thermistor Control (MXZ-2A20NA, MXZ-3A30NA) Fin temperature thermistor...
  • Page 39 10-2. Auto line correcting <MXZ-3A30NA - > Outdoor unit has an auto line correcting function which automatically detects and corrects improper wiring or piping. Improper wiring or piping can be automatically detected by pressing the piping/wiring correction switch (SW871). When improper wiring or piping is detected, wiring lines are corrected. This will be completed in about 10 to 15 minutes.

  • Page 40: Troubleshooting

    TROUBLESHOOTING MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - 11-1. 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 of the following during servicing. 1) Before servicing the air conditioner, be sure to turn off the unit first with the remote controller, and then after confirm- ing the horizontal vane is closed, turn off the breaker and/or disconnect the power plug.
  • Page 41 2. Outdoor unit failure mode table LED indication The left lamp of Indoor/outdoor Abnormal point Condition Correspondence OPERATION INDICATOR (Outdoor P.C. board) unit failure mode (Failure mode / protection) recall function lamp (Indoor unit) LED 1 LED 2 None (Normal) Outdoor power system 2-time flash Lighting Lighting...
  • Page 42 LED indication The left lamp of Indoor/outdoor Abnormal point (Outdoor P.C. board) Condition Correspondence OPERATION INDICATOR unit failure mode (Failure mode / protection) recall function lamp(Indoor unit) LED 1 LED 2 Communication error 11-time flash Communication error occurs Lighting 6 times •...
  • Page 43 11-4. Troubleshooting check table Indication Symptom Abnormal point / Condition Condition Correspondence LED1(Red) LED2(Yellow) Outdoor unit • Refer to 11-6. "Check of LEV". When the indoor unit detects any abnormality in the LEV for drain. does not Lighting Once LEV for drain •...
  • Page 44 Indication No. Symptom Abnormal point / Condition Condition Correspondence LED1(Red) LED2(Yellow) Outdoor unit These symptoms do not mean any abnormality of the Primary current protection When the input current exceeds 15A. Once Lighting operates. product, but check the following points. Secondary current protection When the current of the compressor exceeds 15A.
  • Page 45 11-5. Trouble criterion of main parts MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - Part name Check method and criterion Defrost thermistor (RT61) Measure the resistance with a tester. Ambient temperature thermistor (RT65) Refer to 11-7. “Test point diagram and voltage”,1. “Outdoor electronic control P.C. board”, the chart of thermistor.
  • Page 46 11-6. Troubleshooting flow MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - Outdoor unit does not operate. (LED display: display OFF) A A Check of power supply Check the connecting of parts of main power supply circuit. Turn ON the power supply. Is there voltage of 208/230V AC in the Check the power supply cable.
  • Page 47 • When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate. • When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. B B How to check mis-wiring and serial signal error Turn OFF the power supply.
  • Page 48 The cooling operation or heating operation does not operate. (LED display: Both LED1 and LED2 lighting) C C Check of R.V. coil CN912 Noise filter P.C. board CN781 Outdoor electronic control P.C. board • When heating operation does not work. 1.
  • Page 49 • When cooling, heat exchanger of non-operating indoor unit frosts. • When heating, non-operating indoor unit get warm. D D Check of LEV Turn ON the power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely. Is "click - click"...
  • Page 50 • When heating, room does not get warm. • When cooling, room does not get cool. E E How to check inverter/ compressor Disconnect the terminal of the compressor. 3 minutes after turning ON the power supply, start EMERGENCY OPERATION. W1 •...
  • Page 51 • When thermistor is abnormal. F F Check of outdoor thermistors Replace the thermistor except RT64. Disconnect the connector in the following table and Abnormal In case that RT64 is abnormal, replace the measure the resistance of the thermistor to check outdoor power board since RT64 is combined whether the thermistor is normal or not.
  • Page 52 • When the operation frequency does not go up from lowest frequency. H H Check of HPS MXZ-3A30NA MXZ-3A30NA - 1. Disconnect the connector CN681 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.
  • Page 53 Defrost thermistor (RT61) 11-7. Test point diagram and voltage Ambient temperature thermistor (RT65) Gas pipe temperature thermistor (RT6A,6B,6C)w 1. Outdoor electronic control P.C. board Fin temperature Outdoor heat exchanger temperature thermistor (RT64) thermistor (RT68) MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA Discharge temperature thermistor (RT62) 32 50 68 86 104 122 140 158 176 Temperature (˚F) 86 104 122 140 158 176 194 212 230 248...
  • Page 54 Defrost thermistor (RT61) Ambient temperature thermistor (RT65) MXZ-3A30NA - Fin temperature thermistor (RT64) Outdoor heat exchanger temperature thermistor (RT68) Discharge temperature thermistor (RT62) 10 20 30 40 50 60 70 80 Temperature (:) 100 110 120 Temperature (:) Temperature (:) LED 1 LED 2 LED 3...
  • Page 55 2. Noise filter P.C. board MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA CN901 To electronic CN902 CN903 To power To power control board board P.C. board 208/230V AC Input CN912 R.V. coil 208/230V AC 208/230V AC 208/230V AC Output Output F64 FUSE F911 FUSE NR64 VARISTOR T2AL250V T1AL250V...
  • Page 56 MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - 3. Outdoor Power board Connect to the compressor Voltage among phases: 5V to 180V 294-370V DC Connect to the earth Output (Red) Connect to the controller board (–) (+)1-5(–): Signal transmission (To electronic control P.C. board) (White) 5V DC pulse wave (+)2-5(–): Zero cross signal...

  • Page 57: Disassembly Instructions

    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.
  • Page 58 OPERATING PROCEDURE PHOTOS Photo 3 Screw of the rear guard Screws of the back panel Photo 5 R.V. coil 4-way valve Screws of LEV coil E the back panel Expansion valve E Screws of the back panel Discharge pipe welded part Photo 4 Suction pipe welded part...
  • Page 59 OPERATING PROCEDURE PHOTOS 3. Removing the 4-way valve Photo 7 R.V. coil (1)Remove the top panel (Photo 1). (2)Remove the service panel, the cabinet and the back panel (Photo 1, 2, 3). Recover refrigerant gas. 4-way valve (3)Remove the electrical parts (Photo 4). (4)Detach the welded parts of 4-way valve and pipe.
  • Page 60 12-2. MXZ-3A30NA OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the compressor Photo 1 Screws of the top panel (1)Remove the screws of the top panel, and remove the top panel (Photo 1). (2)Remove the screws of the service panel, and remove the service panel (Photo 1).
  • Page 61 OPERATING PROCEDURE PHOTOS Photo 4 2. Removing the fan motor Screws of the outdoor fan motor (1)Remove the top panel, the service panel, and the front panel (Photo 1). (2)Disconnect the connectors CN931 and CN932 on the outdoor electronic control P.C. board. (3)Remove the propeller.
  • Page 62 OPERATING PROCEDURE PHOTOS 5. Removing the reactor Photo 7 (1)Remove the top panel (Photo 1). (2)Disconnect the reactor lead wire. (3)Remove the screws of the reactor, and remove the reactor. Screws of the reactor...
  • Page 63 12-3. MXZ-3A30NA - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS Photo 1 Screws of the top panel 1. Removing the compressor (1)Remove the screws of the top panel, and remove the top panel. (2)Remove the screws of the service panel, and remove the ser- Screws of vice panel.
  • Page 64 OPERATING PROCEDURE PHOTOS Photo 5 Screws of the outdoor fan motor 2. Removing the fan motor (1)Remove the top panel, the service panel, and the front panel (Photo 1, 2). (2)Disconnect the connectors CN931 and CN932 on the outdoor electronic control P.C. board. (3)Remove the propeller.
  • Page 65 OPERATING PROCEDURE PHOTOS 5. Removing the reactor Photo 8 (1)Remove the top panel (Photo 1, 2). (2)Disconnect the reactor lead wire. (3)Remove the screws of the reactor, and remove the reactor. Screws of the reactor...

  • Page 66: Parts List

    PARTS LIST (non-RoHS compliant) MXZ-2A20NA 13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 5 6 7 8...
  • Page 67 PARTS LIST (non-RoHS compliant) MXZ-2A20NA 13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-2A20NA Diagram E02 939 232 CABINET E02 817 009 HANDLE E02 939 521 GRILLE...
  • Page 68 PARTS LIST (non-RoHS compliant) MXZ-2A20NA 13-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS...
  • Page 69 PARTS LIST (non-RoHS compliant) MXZ-2A20NA 13-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-2A20NA Diagram E02 851 501 PROPELLER E02 A58 301 RC0J60- OUTDOOR FAN MOTOR E02 B05 440 POWER BOARD Including heat sink and RT64 E02 B05 450 ELECTRONIC CONTROL P.C.
  • Page 70 PARTS LIST (non-RoHS compliant) MXZ-3A30NA 13-3. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 7 8 9...
  • Page 71 PARTS LIST (non-RoHS compliant) MXZ-3A30NA 13-3. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-3A30NA Diagram M21 TK0 232 FRONT PANEL M21 TK0 027 HANDLE ASSEMBLY M21 TK5 010...
  • Page 72 PARTS LIST (non-RoHS compliant) MXZ-3A30NA 13-4. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS...
  • Page 73 PARTS LIST (non-RoHS compliant) MXZ-3A30NA 13-4. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-3A30NA Diagram M21 TK0 501 PROPELLER T2W J7E 301 OUTDOOR FAN MOTOR RC0J60- T2W J7E 440 POWER BOARD Including heat sink and RT64 T2W J7E 451 ELECTRONIC CONTROL P.C.

  • Page 74: Rohs Parts List

    RoHS PARTS LIST (RoHS compliant) MXZ-2A20NA MXZ-2A20NA - 14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 5 6 7 8...
  • Page 75 PARTS LIST (RoHS compliant) MXZ-2A20NA MXZ-2A20NA - 14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name MXZ- MXZ- Remarks 2A20NA 2A20NA - Diagram E12 939 232 CABINET...
  • Page 76 RoHS PARTS LIST (RoHS compliant) MXZ-2A20NA MXZ-2A20NA - 14-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS...
  • Page 77 PARTS LIST (RoHS compliant) MXZ-2A20NA MXZ-2A20NA - 14-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Q'ty/unit Symbol in Wiring Parts No. Parts Name MXZ- Remarks MXZ- Diagram 2A20NA 2A20NA - E12 851 501 PROPELLER E12 A58 301 RC0J60- OUTDOOR FAN MOTOR E12 B05 440 POWER BOARD Including heat sink and RT64...
  • Page 78 RoHS PARTS LIST (RoHS compliant) MXZ-3A30NA 14-3. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 7 8 9...
  • Page 79 PARTS LIST (RoHS compliant) MXZ-3A30NA 14-3. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-3A30NA Diagram M21 L2V 232 FRONT PANEL M21 L2V 027 HANDLE ASSEMBLY M21 L2V 010...
  • Page 80 RoHS PARTS LIST (RoHS compliant) MXZ-3A30NA 14-4. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS...
  • Page 81 PARTS LIST (RoHS compliant) MXZ-3A30NA 14-4. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-3A30NA Diagram M21 L2V 501 PROPELLER T2W L7V 301 OUTDOOR FAN MOTOR RC0J60- T2W L7V 440 POWER BOARD Including heat sink and RT64 T2W L7V 451 ELECTRONIC CONTROL P.C.
  • Page 82 RoHS PARTS LIST (RoHS compliant) MXZ-3A30NA - 14-5. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS...
  • Page 83 RoHS PARTS LIST (RoHS compliant) MXZ-3A30NA - 14-5. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-3A30NA - Diagram M21 0A2 232 FRONT PANEL M21 0A2 027 HANDLE ASSEMBLY...
  • Page 84 RoHS PARTS LIST (RoHS compliant) MXZ-3A30NA - 14-6. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS...
  • Page 85 RoHS PARTS LIST (RoHS compliant) MXZ-3A30NA - 14-6. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-3A30NA - Diagram M21 L2V 501 PROPELLER T2W L7V 301 OUTDOOR FAN MOTOR...

  • Page 86: Optional Parts

    OPTIONAL PARTS 15-1. Different-diameter pipe Unit : inch MXZ-2A20NA Connected pipes MXZ-2A20NA - Length Length Length Model name MXZ-3A30NA diameter MXZ-3A30NA - MAC-A454JP {3/8 — {1/2 {3/8 {1/2 2.72 MAC-A455JP {1/2 — {3/8 {1/2 {3/8 2.56 For different- diameter MAC-A456JP {1/2 —...
  • Page 88 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in May 2007. No. OB444 REVISED EDITION-B 9 Distributed in Jun. 2006. No. OB444 REVISED EDITION-A 8 New publication, effective May 2007 Distributed in Mar.

This manual is also suitable for:

Mxz-2a20naMxz-3a30naMxz-3a30na-1

Table of Contents