GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
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4) Variable-frequency compressor drive board IPM over-temperature fault (ODU fault P8)
5) Recharging circuit faulty of the variable-frequency compressor drive board (ODU fault PF)
Check if the voltage of the
whole system's input power
cable reaches 200V.
Elevate the voltage of
the input power cable
to 380V.
The compressor drive board
is faulty and needs to be
replaced.
Check if the fault occurs
when the system is
powered on.
Check if the IPM module is
screwed well and thermal gel is
applied on the surface.
Replace the compressor's
drive board.
Screw the IPM module
properly and apply thermal gel
on the surface.
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