Troubleshooting by Remote Controller Si20-701_B
79
3.4
A0
Error of External Protection
Device
Remote Controller Display
A0
Applicable Models
FCQ, FMCQ
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
îš„ Actuation of external protection device
îš„ Improper field setting
îš„ Defective indoor unit PCB
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