SiEBE18-526 Troubleshooting for BP Unit
Troubleshooting 291
Troubleshooting
Check No.14
Refer to P.293
Check the outdoor unit's LED A.
Check the indoor unit-outdoor unit
connection wires.
YES
YES
Replace the connection
wiresbetween the
indoor and outdoor
units.
Replace indoor unit
control PCB .
Locate the cause of the
disturbance of the power
supply waveform, and
correct it.
Correct the indoor
unit-outdoor unit
connection wires.
Normal
(Address Setting was
not conducted)
Is there any wiring error?
NO
(Q0393)
Is LED A blinking?
Is the voltage 0 V?
NO
Check No. 14
Check power supply waveform.
Check the voltage of the indoor
unit-outdoor unit connection wires
between No. 1 and No. 2, and
between No 2 and No. 3.
YES
YES
NO
Is there any disturbance?
NO
Push and hold the RESET button on
the outdoor unit PCB for 5 seconds
NO
Does the malfunction
occur again?
YES
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is HAP blinking?
NO
NO (ON or OFF)
Is HAP blinking?
Check for
indoor unit
microcomputer
normal HAP
YES
Turn the power supply off once
and then back on.
Faulty indoor unit PCB
or malfunction of power
supply system.
Resets normally.
Could result from
external cause
(e.g. noise).
Is LED A blinking?
NO
YES
Turn power supply off, and
turn on again.
Faulty BP unit PCB or
malfunction of power
supply system.
Could result from
external cause
(e.g. noise).
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