Service Manual

SiUS121502E Troubleshooting for FFQ Series
Service Diagnosis 135
6.9 Field Setting Abnormality
Error Code
UA
Error Decision
Conditions
Incorrect field setting
Supposed
Causes

Defective indoor unit PCB

Defective outdoor unit PCB

Improper power supply

Indoor-outdoor, indoor-indoor unit transmission wiring

Defective remote controller wiring
Troubleshooting
Connect the wirings correctly.
Replace the indoor unit PCB
(control PCB).
Normal
Connect the wirings correctly.
Check the power supply system
inside the indoor unit.
Could be incorrect wiring.
Check again.
YES
YES
NO
NO
Connect the remote controller
correctly.
YES
YES
NO
YES
Remove the jumper.
NO
YES
Set the field setting correctly.
YES
NO
NO
NO
Blink
(R22125)
Is the remote
controller connected to
one or more indoor
units?
Is the remote
controller wiring jumped
between indoor
units?
Is the field
setting correct?
Do the service
monitors of all the
indoor units blink?
Are the wirings
between indoor unit and
outdoor unit correctly
connected?
Is 220 ~ 240
VAC between No.1
and 3 of the terminal
board for transmission
(indoor unit)?
Does the system conduct
normal operation?
Are the wirings
between indoor unit and
outdoor unit correctly
connected?
Turn off the power. Then, turn
on the power to restart the
system.
Continuously
ON or OFF
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.