Si20-701_B Troubleshooting by Remote Controller
448
3.106
UF
System is not Set yet
Remote Controller Display
UF
Applicable Models
FMCQ, FMDQ-A7/B7
CMSQ
Method of Error Detection
On check operation, the number of indoor units in terms
of transmission is not corresponding to that of indoor
units that have made changes in temperature.
Error Decision Conditions
The error is determined as soon as the abnormality
aforementioned is detected through checking the system
for any erroneous connection of units on the check
operation.
Supposed Causes
îš„ Improper connection of transmission wiring between
indoor-outdoor units and outdoor-outdoor units
îš„ Failure to execute check operation
îš„ Defective indoor unit PCB
îš„ Stop valve is not opened
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