Si20-701_B Troubleshooting by Remote Controller
76
L9 - 02 Stall prevention (startup error) The compressor has not
completed startup operation.
This error is supposed to
have resulted from high
startup differential pressure,
liquid back, excessive
compressor oil, abnormal
compressor coil, seizure of
the compressor shaft,
defective position detection
circuit, etc.. Check and probe
the cause.
LC - 01 Defective wiring Defective transmission
including that caused when
the power supply turns ON.
This error is supposed to
have resulted from
Defective wire connections
around the PCB, defective
outdoor unit PCB, or
defective fan motor. Check
and probe the cause.
LC - 02 Transmission error between
compressor and micro
controller
There is an error in
transmission between the
compressor and the outdoor
unit PCB. If the wire
connections of the
compressor are normal,
check for the same of the
outdoor unit PCB.
PJ - 01 Capacity setting not made This is an outdoor unit PCB
for repair, but has no capacity
setting adaptor connected.
Connect a correct capacity
setting adaptor to the PCB.
PJ - 04 Defective capacity setting This error results from a
mismatch of signals between
the controller in the PCB and
the inverter. Check whether
the type of the PCB is correct
and correct capacity setting
adaptor is connected.
U0 - 02 Refrigerant shortage -
Outdoor unit (Factor 0)
This error results from a
refrigerant shortage. Refer to
the “U0” Troubleshooting flow
chart and make a diagnosis,
and then take
countermeasures.
Error code
Troubleshooting
Description of error Description of diagnosis
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