Daikin J Series Service Manual Page 270

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SiE18-201 BP Unit Trouble Diagnosis
Service Diagnosis 259
4. BP Unit Trouble Diagnosis
4.1 PCB Parts Layout
4.2 LED On Branch Provider Unit (Diagnosis LEDs)
THERMISTOR
ELECTRONIC
EXPANSION
VALVE
(ROOM-C)
ELECTRONIC
EXPANSION
VALVE
(ROOM-B)
ELECTRONIC
EXPANSION
VALVE
(ROOM-A)
ELECTRONIC
EXPANSION
VALVE
(BYPASS)
In case of BPMK928A43only.
In case of BPMK928A43only.
3P058760B
In case of BPMK928A43only.
LED–B GREEN
INTERCOMMUNICATION TD
OUTDOOR UNIT : NORMAL
DIAGNOSIS
DIAGNOSIS
NORMAL
MICROCOMPUTER
: NORMAL
LED-A
ABNORMALITY CHECK INTER-UNIT WIRING
ABNORMALITY
CHECK INTER-UNIT WIRING
GREEN RED
LED-1 LED-2 LED-3 LED-4
MALFUNCTION DETECTION
GREEN
RED NORMALLY OFF
ON
FLASH
OFF
IRRELEVANT
NORMALLY FLASHING
NORMAL
THERMISTOR ABNORMALITY
ELECTRONIC EXPANSION VALVE ABNORMALITY
HIGH PRESSURE PROTECTOR WORKED, OR FREEZE-UP IN OPERATING UNIT OR STAND-BY UNIT
CHECK INDOOR OR OUTDOOR UNIT
[ NOTE 1]
POWER SUPPLY FAULT OF [NOTE 2]
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 DICONNECT 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 UNITY WIRING AND CHECK
THE DIAGNOSIS BY LEDS ON INDOOR
UNIT PCB.
3P058760B
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