Installations
Domestic air conditioner
31
Check whether Terminal on the outdoor
mainboard is well inserted.
it is normal
Reinsert the terminals
Electrify the machine again and turn it on in
the Cool state with the remote controller.
check whether the motor could run.
Remove fan m otor afte r s witch off
the power.Measure the resistances
between black line (0V) and red
line( 310V),between black line(0V)
and white line ( 1 5 V) of the fan
motor .
NO
YES
The resistances are
greater than 40KΩ
NO
YES
The motor of the outdoor unit is
damaged and needs replacing.
NO
the resistances between 0V
and 310V,between 0V and 15V of
the fan terminal of outdoor pcb are
greater than 10MΩ.
The module pcb is
damaged, replace it
with a new one.
The outdoor pcb is
damaged, replace it
with a new one.
YES
The motor and
outdoor pcb are
well
YES
NO
10.3.5 IPM protection
Outdoor display: LED1 flash 2 times
Method of
IPM protection is detected by checking the compressor running condition and so on
Malfunction
Detection
Malfunction
■
The system leads to IPM protection due to over current
Decision
■
The compressor faulty leads to IPM protection
Conditions
■
circuit component of IPM is broken and led to IPM protection
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