External Protection Device Abnormality - Daikin VRV RXYMQ-A Series Service Manual

Troubleshooting by Error Code
5.3

External Protection Device Abnormality

Applicable All indoor unit models
Models
A0
Error Code
Method of Error
Detects open or short circuit between external input terminals in indoor unit.
Detection
Error Decision
An open circuit occurs between external input terminals with the remote controller set for
Conditions external ON/OFF input.
Supposed  Activation of external protection device
 Improper field setting
Causes
 Defective indoor unit PCB
Troubleshooting
160
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 terminals T1 and
T2 of the indoor unit
terminal block.
NO
Check the setting state of the
ON/OFF input from outside by remote
controller.
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.
NO
YES
YES
SiME332106E
Activation of external
protection device.
Change the second code
No. to 01 or 02.
Replace the indoor unit
control PCB (A1P).
Part 6 Service Diagnosis