Daikin RXYQ-TA Series, Service Manual

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SiUS341615E Troubleshooting by Error Code
Service Diagnosis 174
3. Troubleshooting by Error Code
3.1 External Protection Device Abnormality
3.1.1 External Protection Device Abnormality (All Indoor Unit Models)
Error Code
A0
Applicable
Models All indoor unit models
Method of Error
Detection Detect open or short circuit between external input terminals in indoor unit.
Error Decision
Conditions When an open circuit occurs between external input terminals with the remote controller set to
"external ON/OFF terminal".
Supposed
Causes
„
Actuation of external protection device
„
Improper field setting
„
Defective indoor unit PCB
Troubleshooting
ON/OFF
input from
outside (mode No.
12, first code No. 1) has
been set to external protection
device input (second
code No. 03) by
remote
controller.
Check the setting state of the
external ON/OFF input by
remote controller.
Ex ternal
protection device
is connected to T1 and T2
of the indoor unit
terminal.
Replace the indoor unit main
PCB (A1P).
Actuation of external protection
device.
Change the second code No. to
01 or 02 .
YES
NO
NO
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.