Daikin E Series, Service Manual

Page: 317 / 453

Caution for Diagnosis SiAU18-715
304 Troubleshooting
1.4 Troubleshooting with the LED on the BP Unit
LEDA(H1P)
LED1(H2P)
LED2(H3P)
LED3(H4P)
LED4(H5P)
(Q0395)
HIGH PRESSURE PROTECTOR WORKED, OR FREEZE-UP IN OPERATING UNIT OR STAND-BY UNIT
POWER SUPPLY FAULT OR [NOTE 2]
DIAGNOSIS
DIAGNOSIS
LED-2 LED-3 LED-1
GREEN
THERMISTOR ABNORMALITY
RED
[NOTE 1]
NORMAL
→
CHECK INDOOR OR OUTDOOR UNIT
RED
GREEN
FLASH
INTERCOMMNICATION TO
OUTDOOR UNIT : NORMAL
ELECTRONIC EXPANSION VALVE ABNORMALITY
LED-4
NORMALLY FLASHING
OFF
NORMAL
ABNORMALITY
→
CHECK INTER-UNIT WIRING
ON
MALFUNTION DETECTION
IRRELEVANT
NORMALLY OFF
LED-B (GREEN)
MICROCOMPUTER
: NORMAL
LED-A
ABNORMALITY
→
CHECK INTER-UNIT WIRING
   
   

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 DAIGNOSIS BY LEDS ON INDOOR UNIT PCB.
3P058760C