Daikin LX10F11B Service Manual page 74

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Symptom
F. Controller does ・ R or T-phase is
not turn on. open.
・ Faulty power
supply (voltage
drop)
・ Disconnection of
power cable
・ Faulty power plug
・ Disconnection
of fuse F1U (I/O
board) circuit
Faulty transformer
A. Unit operates
but soon stops
Refer to the Alarm
(full stop).
code list.
B. Evaporator
fan runs, but
condenser fan
Cooling OFF
and compressor
(normal)
stop soon.
C. Compressor
runs, but
condenser fan
and evaporator Defrost (normal)
fan stop.
Cause
Is the
voltage of three-
phase power supply on the
primary side of the circuit
breaker AC300V
or less?
Is the fuse F1U circuit
opened?
Is the voltage
at X30A (I/O board)
AC20V or less?
Replace I/O board.
2-46
Checkpoint
YES
NO
YES
NO
YES
NO
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Remedy
＊R or T-phase is open.
＊Faulty power supply (voltage drop)
＊Disconnection of power cable
＊Power plug failure
＊Replace fuse F1U
＊Check open circuit
Replace the transformer Tr1.
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