GREE ELECTRIC GUHD09NK3CO Service Manual page 127

Method of Testing IPM Module Short Circuit:
1. Preparation before test: prepare a universal meter and turn to its diode option, and then remove the wires U, V, W
of the compressor after it is powered off for one minute.
2. Testing Steps
Step 1: put the black probe on the place P and the red one on the wiring terminal U, V, W respectively as shown in
Step 2: put the red probe on the place N and the black one on the wiring terminal U, V, W respectively as shown in
3. If the measured voltages between UP, VP, WP, NU, NV, NV are all among 0.3V-0.7V, then it indicates the IPM
module is normal; If any measured valve is 0, it indicates the IMP is damaged.
PFC or IPM module overheat
U-Match Series DC
Inverter Service Manual
124