Haier MRV II Instruction Manual page 136

[60] logic abnormal
check if there is
interference around
the electric box
check if DCCT,
ACCT is no rmal
if voltage of IPM-
FO is normal
yes
yes
if VDC is normal
yes
no improve the power
supply surroundings
no
make improvement
no
check AC contactor circu it
no
replace inverter board
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Part 3