Field Setting Abnormality - Daikin 2MXS-N Series Service Manual

SiUS121502E
6.9

Field Setting Abnormality

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