Error Of External Protection Device - Daikin RZQ Series FCQ20EVA Service Manual

Troubleshooting by Remote Controller
4.4

Error of External Protection Device

A0
Error Code
Applicable
FCQ
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
Conditions "external ON/OFF terminal."
 Actuation of external protection device
Supposed
 Improper field setting
Causes
 Defective indoor unit PCB
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
protection device is
connected to terminals T1 and
T2 of the indoor unit
Check the setting state of the
ON/OFF input from outside by remote
controller.
ON/OFF input (mode
No. 12, first code No. 1) has
been set to external protection
device input (second code
No. 03) by remote
91
External
YES
terminal block.
NO
External
YES
controller.
NO
SiME281501E
Actuation of external protection
device.
Change the second code No. to
"01" or "02".
Replace the indoor unit PCB.
Service Diagnosis