Troubleshooting With The Led On The Bp Unit - Daikin E-Series Service Manual

Caution for Diagnosis
1.4

Troubleshooting with the LED on the BP Unit

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