Troubleshooting With The Led On The Bp Unit - Daikin Super Multi Plus D-Series Service Manual

Caution for Diagnosis
1.4

Troubleshooting with the LED on the BP Unit

244
LED-B (green)
Intercommunication to
outdoor unit: normal
Normal
Abnormality
Abnormality
Green Red
Microcomputer: Malfunction detection
normal
LED-1 LED-2 LED-3 LED-4
LED-A
Notes 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.
< 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 diagnosis by LEDS on
indoor unit PCB.
LEDA(H1P)
LED1(H2P)
LED2(H3P)
LED3(H4P)
LED4(H5P)
Diagnosis
Check inter-unit wiring
Check inter-unit wiring
Normal Check indoor or outdoor unit
Thermistor abnorrmality
High pressure protector worked, or freeze-up in operating unit or stand-by
Electronic expansion valve abnormality
[ Note 1 ]
Power supply fault or [ Note 2 ]
SiEBE18-526
(Q0395)
Green Normally flashing
Red Normally off
On
Flash
Off
Irrelevant
Diagnosis
Troubleshooting
3P058760C