Caution for Diagnosis SiEBE18-526
244 Troubleshooting
1.4 Troubleshooting with the LED on the BP Unit
LEDA(H1P)
LED1(H2P)
LED2(H3P)
LED3(H4P)
LED4(H5P)
(Q0395)
LED-B (green)
Green Red
Normal
Diagnosis
Diagnosis
Abnormality
Abnormality
Check inter-unit wiring
Check inter-unit wiring
LED-1 LED-2 LED-3 LED-4
Red
Green Normally flashing
Normally off
On
Normal Check indoor or outdoor unit
High pressure protector worked, or freeze-up in operating unit or stand-by
Thermistor abnorrmality
Electronic expansion valve abnormality
[ Note 1 ]
Notes
3P058760C
< If LED-A is off: >
The branch provider unit PCB
is faulty.
< If LED-A is flashing: >
The indoor unit PCB is faulty.
Turn the reconnect line 2 of
all inter-unit wiring and check
the diagnosisby LEDS on
indoor unit PCB.
1. Turn the power off then on again,
if the LED display recurs, the branch
provider unit PCB is faulty.
2. Turn the power off and then on again,
if the LED display recurs, turn the
power off and disconnect line 2 of
inter-
unit wiring for all units, then turn
the power on again.
Power supply fault or [ Note 2 ]
Flash
Off
Irrelevant
Malfunction detection
Microcomputer:
normal
LED-A
Intercommunication to
outdoor unit: normal
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