Troubleshooting by Remote Controller Si20-701_B
421
3.97
U9
Transmission Error
Between Indoor and Outdoor
Units in the Same System
Remote Controller Display
U9
Applicable Models
RZQ-C7, CMSQ
Method of Error Detection
Detect the error signal of any other indoor unit within the
system concerned.
Error Decision Conditions
When the error decision is made on any other indoor unit
within the system concerned
Supposed Causes
îš„ Defective transmission within or outside of other
system
îš„ Defective electronic expansion valve in indoor unit of
other system
îš„ Defective indoor unit PCB in other system
îš„ Improper connection of transmission wiring between
indoor and outdoor unit
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