Carrier 38MGRBQ18B-3 Service Manual page 82

38MGRBQ: Service Manual
3 ELECTRICAL PARTS
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
REMOVE ELECTRICAL PARTS
1. Perform the steps from sections 1 and 2.
2. Remove the four screws securing the IPM board.
3. Loosen the reactor connector.
4. Loosen the compressor connector.
5. Disconnect the 3 connection wires and connectors between
the IPM and main control PCB.
6. Remove the IPM board.
7. Disconnect the connectors and wires connected to the PCB
and other parts.
Connectors:
CN17:T3/T4 temperature sensor (2p/2p,white)
CN7: Discharge temperature sensor (2p,white)
CN15:T2B-A,B temperature sensor (2p/2p,white)
CN18/CN19: Electronic expansion valve A,B (6p/6p,red/
red)
CN25/CN23: S-A,S-B (3p/3p,white/white)
Wires:
CN1/CN2: 4-way valve (blue-blue)
CN5/CN6: Crankcase heating cable (red-red)
CN3:L-IN (red)
CN4:N-IN (black)
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PCB Board
IPM Board
CN1(5p,white)
CN14(3p,white)
CN4(red or brown)
CN5(blue)
CN17 CN15 CN 18/CN 19 CN 25/CN 23
CN 7
CN4
CN3
CN 5/CN 6
CN 1/CN 2