Haier MRV II - Outdoor Trouble Diagnose and Trouble Shooting

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4.2 Outdoor trouble diagnose and trouble shooting
No.
trouble
exhibition
trouble analysis
trouble
shooting
check if the power voltage is
normal, low power voltage will
cause big current
380V±10%
（342V～
418V）
power module is damaged,
then three phase output is not
in balance and power module
alarm
change power
module
inverter board fault, then three
phase output is not in balance
and power module alarm
change inverter
board
CN1 and CN2 on power
module are not inserted well
Re-insert
1
master unit
alarm over
current
Compressor coil is faulty or
grounding resistor is 0
Replace
compressor
（ 3-phase coil
resistor is
0.481Ω/20）
three phase output
current/voltage of power
module in balance
change power
module
2
frequency of
master unit
is too low,
compressor
shake
greatly
inverter board fault
change inverter
board
3 other trouble
after being electrified, the
digital tube of master unit
display “C” or “H”, and start up
automatically
cool or heat
compulsorily,
please change
the PCB
immediately
Part 2