Gree GUHD series - Page 107

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104
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
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Step 2: put the red probe on the place N and the black one on the wiring terminal U, V, W respectively
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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.
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PFC or IPM module overheat
N
N
Y
Y