Troubleshooting By Error Code; External Protection Device Abnormality - Daikin RXYQ-TA Series Service Manual

SiUS341615E

3. Troubleshooting by Error Code

3.1

External Protection Device Abnormality

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