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Service Manual
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
3. IPM continuity check
WARNING: ELECTRICAL HAZARD
f Electricity remains in capacitors even when the power
supply is off. Ensure the capacitors are fully discharged
before trouble shooting.
Turn off the power, let the large capacity electrolytic capacitors discharge
completely, then dismount the IPM. Use a digital tester to measure the resistance
between P and UVWN; UVW and N.
Digital tester Normal resistance value Digital tester Normal resistance value
(+)Red (-)Black
∞
(Several MΩ)
(+)Red (-)Black
∞
(Several MΩ)
P
N U
N
U V
V W
W (+)Red
Table 50
Figure 88
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