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Mitsubishi Electric PU-2NJA Technical & Service Manual
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Mitsubishi Electric PU-2NJA Technical & Service Manual

Mitsubishi Electric PU-2NJA Technical & Service Manual

Split-type, air conditioners outdoor unit
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SPLIT-TYPE, AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Outdoor unit
[Model names]
PU-2NJA
PU-2.5NJA
PU-3NJA
PU-4TJSA
PU-5TJSA
PU-5XJSA
PU-6TJSA
PU-6XJSA
Outdoor unit
[Service Ref.]
PU-2NJA.TH
Model name
indication
CONTENTS
2. PART NAMES AND FUNCTIONS ··················2
3. DATA ·······························································3
4. OUTLINES AND DIMENSIONS ······················5
5. WIRING DIAGRAM ·········································9
6. REFRIGERANT SYSTEM DIAGRAM ···········11
7. TROUBLESHOOTING ··································12
8. DISASSEMBLY PROCEDURE ·····················16
9. PARTS LIST ··················································18
10. OPTIONAL PARTS ·······································27
August 2005
No.OC353

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  • Page 1: Table Of Contents

    SPLIT-TYPE, AIR CONDITIONERS August 2005 No.OC353 TECHNICAL & SERVICE MANUAL Outdoor unit [Model names] [Service Ref.] PU-2NJA.TH PU-2NJA PU-2.5NJA.TH PU-2.5NJA PU-3NJA.TH PU-3NJA PU-4TJSA.TH PU-4TJSA PU-5TJSA.TH PU-5TJSA PU-5XJSA.TH PU-5XJSA PU-6TJSA.TH PU-6TJSA PU-6XJSA.TH PU-6XJSA CONTENTS 1. COMBINATION OF INDOOR AND OUTDOOR UNITS ···2 2.

  • Page 2: Pu-2.5Nja.th

    — PK-2GKLD OC228 PART NAMES AND FUNCTIONS Outdoor Unit Air outlet Air outlet (Expels warm air during cooling) Air intake Air intake PU-2.5NJA.TH PU-2NJA.TH PU-3NJA.TH Air outlet Air outlet Air intake Air intake PU-4TJSA.TH PU-5XJSA.TH PU-5TJSA.TH PU-6XJSA.TH PU-6TJSA.TH wUnit of pressure is based on ISO (International Standardization Organization) [kgf/cm ] [MPa] (1MPa=10.2kgf/cm...

  • Page 3: Data

    2.POWER SUPPLY & MODEL NAMES Model name ( Outdoor unit ) /Service Ref. Power supply Service Ref. ( inddor unit ) PU-2 PU-2.5 PU-3 PU-4 PU-5 PU-6 220V PU-2NJA.TH PU-2.5NJA.TH PU-3NJA.TH — — — 60Hz 220V — — — PU-4TJSA.TH PU-5TJSA.TH PU-6TJSA.TH 380/220V —...
  • Page 4 Refrigerant piping length (one way) precharged (kg) Service Ref. 20m (66ft) 25m (82ft) 30m (98ft) 35m (115ft) 40m (131ft) 45m (148ft) 50m (164ft) (up to 20m) PU-2NJA.TH 0.06 (0.13) 0.12 (0.26) – – – – PU-2.5NJA.TH 0.06 (0.13) 0.12 (0.26) –...

  • Page 5: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit : mm (inch) PU-2NJA.TH...
  • Page 6 Unit : mm (inch) PU-2.5NJA.TH PU-3NJA.TH...
  • Page 7 PU-4TJSA.TH Unit : mm (inch)
  • Page 8 PU-5TJSA.TH PU-6TJSA.TH Unit : mm (inch) PU-5XJSA.TH PU-6XJSA.TH...

  • Page 9: Wiring Diagram

    WIRING DIAGRAM PU-2NJA.TH PU-2.5NJA.TH POWER SUPPLY 220V 60z L1/1 T1/2 COMPRESSOR RUN CAPACITOR COMPRESSOR PROTECTOR L3/5 T3/6 FAN MOTOR CAPACITOR FUSE(5A) 49F3 GRN/YLW COMPRESSOR FAN MOTOR POWER SUPPLY TERMINAL BLOCK INDOOR/OUTDOOR CONNECTING LINE TERMINAL BLOCK COMPRESSOR INTERNAL THERMOSTAT 49F3 FAN MOTOR INTERNAL THERMOSTAT...
  • Page 10 PU-5TJSA.TH PU-6TJSA.TH POWER SUPPLY 3~ (3PHASE) 220V 60Hz L1/1 T1/2 CIRCUIT L2/3 BREAKER T2/4 L3/5 T3/6 GRN/YLW 49F3 (5A) 49F4 COMPRESSOR PROTECTOR C3,4 FAN MOTOR CAPACITOR FUSE(5A) PHASE PROTECTOR COMPRESSOR MF3,4 FAN MOTOR TERMINAL BLOCK(POWER SUPPLY) TERMINAL BLOCK (CONNECTING WIRES INDOOR/OUTDOOR) THERMAL SWITCH INTERNAL THERMOSTAT FOR MC 49F3,4...

  • Page 11: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PU-2NJA.TH PU-2.5NJA.TH PU-3NJA.TH Low pressure Check Low pressure switch plug High pressure switch switch High pressure Ball Ball Charge Check Charge switch valve valve plug plug plug 15.88 15.88 (5/8) (5/8) #100 Outdoor heat Strainer exchanger Outdoor heat...

  • Page 12: Troubleshooting

    TROUBLE SHOOTING 7-1. SELF-DIAGNOSTIC FUNCTION 7-1-1. Wired remote controller (1) ! When trouble occurs during operation, the unit stops and enters the self-diagnostic mode, and displays the trouble loca- tion with the timer lamps on the remote controller. All the other lamps are OFF. @ To activate the self-diagnostic function for service, press the UP and DOWN buttons simultaneously for more than two TEMP.
  • Page 13 7-1-2. WIRED REMOTE CONTROLLER(2) 1) When malfunction occurs during operation When a malfunction occurs, the indoor and outdoor units stop and the malfunction is displayed on the LCD of the remote controller. (1) ON the set temperature display part, “CHECK” appears, and the unit address and the check code are displayed alternately at one-second CHECK mode intervals.
  • Page 14 Check Diagnosis of malfunction Cause Check points code (P1) Abnormality of room temper- 1) Bad contact of thermistor 1) Check the thermistor. ature thermistor (RT1) 2) Damaged thermistor 2) Measure the resistance of the thermistor. Normal resistance should be as follows. 0°C ···15kΩ...
  • Page 15 7-2. HOW TO CHECK THE PARTS PU-2NJA.TH PU-2.5NJA.TH PU-3NJA.TH PU-4TJSA.TH PU-5TJSA.TH PU-5XJSA.TH PU-6TJSA.TH PU-6XJSA.TH Parts name Check points FAN MOTOR Measure the resistance between the terminals using a tester. (Surrounding temperature 20: ) ( MF3 , MF4 ) Normal Motor lead wire Abnormal 2 , 2.5 , 3N...

  • Page 16: Disassembly Procedure

    DISASSEMBLY PROCEDURE OUTDOOR UNIT PU-3NJA.TH OPERATING PROCEDURE PHOTOS 1. Removing the electrical parts Photo 1 ( 1 ) Remove the 5 screws and the top panel. ( 3 screws in Screws front and 2 screws in rear ) ( 2 ) Remove the screw of the cover panel. To remove the Top panel cover panel, pull it toward you and unhook the catch- es from the side panel.
  • Page 17 OPERATING PROCEDURE PHOTOS 3. Removing the heat exchanger and the compressor Photo 4 ( 1 ) Remove the rear panel (2 screws in front, 1 screw on Screws the side, 3 screws in the rear). Remove the valve bed, and open the rear panel to the rear to remove. NOTE : All panels are fixed by catches, and must be removed by shifting up and down.

  • Page 18: Parts List

    PARTS LIST STRUCTURAL PARTS PU-2NJA.TH ty/set Price Wiring Recom- PU-2 Remarks Part No. Part Name Specification Diagram mended Unit Amount Symbol NJA.TH (Z004M203H10) — (5o10) SCREW 13Pcs/set E07 001 249 LEFT SIDE PANEL E07 001 009 HANDLE E07 001 232...
  • Page 19 STRUCTURAL PARTS PU-2.5NJA.TH PU-3NJA.TH ty/set Price Wiring Recom- PU-2.5, 3 Remarks Part No. Part Name Specification Diagram mended Unit Amount Symbol NJA.TH (Z004M203H10) — SCREW (5o10) 13Pcs/set E02 214 249 LEFT SIDE PANEL E07 003 232 FRONT PANEL E07 001 009 HANDLE E02 527 521 FAN GUARD...
  • Page 20 STRUCTURAL PARTS PU-4TJSA.TH ty/set Price Wiring Recom- PU-4 Remarks Part No. Part Name Specification Diagram mended Unit Amount Symbol TJSA.TH (Z004M203H10) (5o10) — SCREW 13Pcs/set E07 005 249 LEFT SIDE PANEL E02 527 521 FAN GUARD E07 005 232 FRONT PANEL E07 001 009 HANDLE E07 005 290...
  • Page 21 STRUCTURAL PARTS PU-5TJSA.TH PU-6TJSA.TH PU-5XJSA.TH PU-6XJSA.TH ty/set Price Wiring Recom- PU-5, 6 Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Unit Amount Symbol TJSA.TH XJSA.TH FRONT PANEL E07 016 232 FAN GUARD E02 527 521 HANDLE E07 001 009 BASE E07 016 290 PANEL COVER...
  • Page 22 FUNCTIONAL PARTS PU-2NJA.TH Part numbers that are circled are not shown in the figure. ty/set Price Recom- Wiring PU-2 Remarks mended Part No. Part Name Specification Diagram Unit Amount Symbol NJA.TH FUSE HOLDER E07 001 241 FUSE 250V 5A E07 001 382...
  • Page 23 FUNCTIONAL PARTS PU-2.5NJA.TH PU-3NJA.TH Part numbers that are circled are not shown in the figure. ty/set Price Recom- Wiring Remarks PU-2.5 PU-3 mended Part No. Part Name Specification Diagram (Drawing No.) Unit Amount Symbol NJA.TH NJA.TH FUSE HOLDER TEAMINAL BLOCK 3P(L,N, 2P(1,2) TEAMINAL BLOCK...
  • Page 24 FUNCTIONAL PARTS PU-4TJSA.TH Part numbers that are circled are not shown in the figure. ty/set Price Recom- Wiring PU-4 Remarks mended Part No. Part Name Specification Diagram Unit Amount Symbol TJSA.TH TERMINAL BLOCK 3P(L,N,;) E07 193 374 E07 002 374 TERMINAL BLOCK 2P(1,2) FAN MOTOR...
  • Page 25 FUNCTIONAL PARTS PU-5TJSA.TH PU-6TJSA.TH Part numbers that are circled are not shown in the figure. ty/set Price Recom- Wiring Remarks PU-5 PU-6 mended Part No. Part Name Specification Diagram (Drawing No.) Unit Amount Symbol TJSA.TH FAN MOTOR PK6N65-UA E07 194 301 MF3,4 HEAT EXCHANGER E07 035 630...
  • Page 26 FUNCTIONAL PARTS PU-5XJSA.TH PU-6XJSA.TH Part numbers that are circled are not shown in the figure. ty/set Price Recom- Wiring PU-5 PU-6 Remarks mended Part No. Part Name Specification Diagram (Drawing No.) Unit Amount Symbol XJSA.TH FAN MOTOR PK6N65-UA MF3,4 HEAT EXCHANGER HEAT EXCHANGER PROPELLER FAN HIGH PRESSURE SWITCH...

  • Page 27: Optional Parts

    OPTIONAL PARTS AIR OUTLET GUIDE This guide is needed for changing the direction of the outdoor unit’s air discharge upward or downward. For PU-4~6, 2 pcs of PAC-292SG are needed. Part No. PAC-292SG Unit : mm 7 4O{6 hole...
  • Page 28 HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Issued in Aug. 2005. No. OC353 PDF 8 Made in Japan. New publication, effective Aug. 2005 Specifications subject to change without notice.

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