GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
191
6) High voltage protection for the DC bus of the variable-frequency compressor's drive board (ODU
fault PH)
7) Low voltage protection for the DC bus of the variable-frequency compressor's drive board (ODU
fault PL)
Check if the voltage of the
whole system's input power
cable exceeds 465 V.0V.
Lower the voltage of
the input power cable
to 380 V.
The compressor's drive
board is faulty and needs to
be replaced.
Check if the voltage of the
whole system's input power
cable is lower than 200V.
Elevate the voltage of
the input power cable
to 380 V.
The compressor's drive board
is faulty and needs to be
replaced.
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