40MBDAQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
47
IPM Continuity Check
1. Turn off the outdoor unit and disconnect the power supply.
2. Discharge the electrolytic capacitors and ensure the energy-storage unit(s) have been discharged.
3. Disassemble the outdoor PCB or disassemble the IPM board.
4. Measure the resistance value between P and U(V, W, N); U(V, W) and N.
Table 14 — Digital Tester
DIGITAL TESTER RESISTANCE VALUE DIGITAL TESTER RESISTANCE VALUE
(+)Red (-)Black
Several M
(+)Red (-)Black
Several M
P
NU
N
UV
VW
W-
Electricity remains in capacitors even when the power supply is off.
Ensure the capacitors are fully discharged before troubleshooting.
WA RN I N G
WA RN I N G
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