Daikin FFQ25B7V1B - Troubleshooting by LED Indications on the Indoor Unit

ESIE05-04 Troubleshooting
Part 3 – Troubleshooting 3–27
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1.8 Troubleshooting by LED Indications on the Indoor Unit
Foreword Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal)
w : LED on / x : LED off / c : LED blinks / — : No connection with troubleshooting
Notes: 1 When the INSPECTION/TEST button of remote controller is pushed, INSPECTION display blinks
entering INSPECTION mode.
2 In the INSPECTION mode, when the ON/OFF button is pushed and held for 5 seconds or more,
the aforementioned malfunctioning history display is off. In this case, after the malfunction code
blinks 2 times, the code display turns to “00” (=Normal) and the unit No. turns to “0”. The
INSPECTION mode automatically switches to the normal mode (set temperature display).
3 Operation halts due to malfunction depending on the model or condition.
4 If LED-B is off, the transmission wiring between indoor and outdoor unit may be incorrect or
disconnected. Before performing the previously described troubleshooting, check the transmission
wiring.
5 Troubleshoot by turning off the power supply for a minimum of 5 seconds, turning it back on, and
then rechecking the LED display.
Microcomputer
Normal Monitor
Transmission
Normal Monitor
Contents/Processing
HAP (LED-A) HBP (LED-B)
cc
Indoor unit normal → Outdoor unit trouble shooting
cw
Incorrect transmission wiring between indoor and out-
door unit
x
If outdoor unit’s LED-A is off, proceed outdoor unit’s
trouble shooting. If outdoor unit’s LED-A blinks, failure of
wiring or indoor or outdoor unit P.C board ass’y. (Note 4)
w
— Failure of indoor unit PC board ass’y (Note 5)
x
Malfunction of power supply or failure of PC board ass’y
or broken transmission wire between indoor and outdoor
unit. (Note 5)