Daikin VRV X RXQ6-48ANR Series, Service Manual, Page: 164 / 297

Troubleshooting by Error Code SiME341909EA
158 Part 6 Service Diagnosis
5.3 External Protection Device Abnormality
Applicable
Models
All indoor unit models
Error Code
A0
Method of Error
Detection
Detects open or short circuit between external input terminals in indoor unit.
Error Decision
Conditions
An open circuit occurs between external input terminals with the remote controller set for
external ON/OFF input.
Supposed
Causes
 Activation of external protection device
 Improper field setting
 Defective indoor unit PCB
Troubleshooting
Activation of external
protection device.
External
protection device is
connected to terminals T1 and
T2 of the indoor unit
terminal block.
Replace the indoor unit
control PCB (A1P).
YES
Change the second code
No. to
01 or 02 .
External
ON/OFF input (mode
No. 12, first code No. 1) has
been set to external protection
device input (second code
No. 03) by remote
controller.
YES
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check the setting state of the
ON/OFF input from outside by remote
controller.
NO