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Service Manual
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
5. Disconnect wires between IPM board and PCB as shown below.
Figure 124
CN1 (5p,white)
CN14 (3p,white)
CN3 (red or brown)
CN5
(blue)
6. Remove the IPM board.
Figure 125
7. Disconnect the connectors and wires connected the PCB from other parts.
Connectors:
f CN17: T3/T4 Temperature sensor (2p/2p,white)
f CN7: Discharge temperature sensor (2p,white)
f CN15:T2B-A,B,C temperature sensor (2p/2p/2p,white)
f CN18/CN19/CN22: Electronic expansion valve A,B,C
(6p/6p/6p,red/red/red)
f CN25/CN23/CN20: S-A,S-B,S-C (3p/3p/3p,white/white/white)
Wires:
f CN1/CN2: 4-way valve (blue-blue)
f CN5/CN6: Crankcase heating cable (red-red)
f CN3:L1-IN (red)
f CN4:L2-IN (black)
Figure 126
CN15
CN7
CN17
CN18/CN19/CN22
CN1/CN2
CN3
CN5/CN6
CN4
CN20
CN23
CN25
8. Disconnect the grounding wire (yellow-green).
Figure 127
9. Remove PCB.
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