Troubleshooting for Outdoor Unit SiBE18-821_C
406 Troubleshooting
7.21 Compressor Start-up Error
Remote
Controller
Display
L9
Method of
Malfunction
Detection
The error is detected from current flowing in the power transistor.
Malfunction
Decision
Conditions
Starting control of the compressor does not complete.
Supposed
Causes
Defective compressor
Large pressure difference before starting the compressor
Defective main PCB (A1P)
Troubleshooting
Disconnect the connection
between the compressor
and the main PCB. Make
the power transistor check
mode ON by service mode.
The
difference
between high and low
pressure when starting
is above 0.2
MPa.
After
turning on again, "L9"
blinks again.
Is the
inverter
output voltage
balanced? (Normal if
within ±5 V. Must be
measured when
frequency is
stable.)
Replace the main PCB
(A1P).
Not balanced
Unsatisfactory pressure
equalization.
Check refrigerant system.
NO
YES
Balanced
Inspect the compressor
according to the diagnosis
procedure for odd noises,
vibration and operating
status of the compressor.
(R13039)
Reset and restart.
NO
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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