Daikin R71FUV1 Service Manual page 83

Si20-701_B
Error code
L9 - 02 Stall prevention (startup error) The compressor has not
LC - 01 Defective wiring
LC - 02 Transmission error between
compressor and micro
controller
PJ - 01 Capacity setting not made
PJ - 04 Defective capacity setting
U0 - 02 Refrigerant shortage -
Outdoor unit (Factor 0)
76
Description of error
Troubleshooting by Remote Controller
Troubleshooting
Description of diagnosis
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.
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,
outdoor unit PCB, or
defective fan motor. Check
and probe the cause.
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.
This is an outdoor unit PCB
for repair, but has no capacity
setting adaptor connected.
Connect a correct capacity
setting adaptor to the PCB.
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.
This error results from a
refrigerant shortage. Refer to
the "U0" Troubleshooting flow
chart and make a diagnosis,
and then take
countermeasures.
defective