Gree GMV5E Series - Cautions on Compressor Drive Replacement

GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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For details about each index, please consult after-sale persons and technicians.
3.3 Cautions on Compressor Drive Replacement
1. Disconnect the power supply of the system. Set a multimeter to the AC voltage gear and measure
voltage between two of the lines (L1, L2, L3, and N). The measuring result should be 0 V
(sometimes, multimeters may be faulty and read false values). Set a mark beside the power
supply for warning.
2. Measure compressor drive DC bus voltage between two wire terminals of P, U, V, W and N. Set
the multimeter to the DC voltage gear and measure the voltage between P and N. The voltage
should be lower than 36 V. If no multimeter is available, wait for 20 minutes before performing the
steps below.
Note: The blue squares
indicate pads.