Carrier 38MGRBQ18B-3 Service Manual page 97

38MGRBQ: Service Manual
3 ELECTRICAL PARTS
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
5. Disconnect the fan motor connector CN19(3p,white) from
the driver board.
6. Loosen four fixing screws and remove the fan motor.
REMOVE THE ELECTRICAL PARTS
1. Perform the steps from sections 1 and 2.
2. Loosen the reactor connector.
3. Loosen the compressor connector.
4. Loosen the PFC Inductor connector.
5. Disconnect the following 3 pieces of connection wires and
connectors between the driver board and the PCB.
CN55-CN7(7p,white)
CN54-CN6(red)
CN53-CN5(black)
6. Remove the securing screws, then move the driver board.
7. Disconnect the connectors and wires connected from the
PCB and other parts.
Connectors:
CN8:T3/T4 temperature sensor (2p/2p,white)
CN33: Discharge temperature sensor (2p,white)
CN13:T2B-A,B,C,D temperature sensor (2p/2p/2p/
2p,white)
CN18/CN17/CN21/CN20: Electronic expansion valve
A,B,C,D (6p/6p/6p,red/red/red)
CN30/CN29/CN28/CN27: S-A,S-B,S-C,S-D (3p/3p/3p/
3p,white)
CN9: High and low pressure switch (2p/2p, white)
Wires:
CN3/CN22: 4-way valve (blue-blue)
CN4/CN40: Crankcase heating cable (black-red)
CN10/CN44: Crankcase heating cable (black-red)
CN1:L1-IN (red)
CN2:L2-IN (black)
97
REMARKS
PCB Board
Driver Board
CN 53
CN 54
CN 55
CN 18/CN 17/CN 21/CN 20
CN 30/
CN 29/
CN 28/
CN 27/
CN 8 CN9