Field Setting Abnormality - Daikin 2MXS40H2V1B Service Manual

Troubleshooting for SA Indoor Unit
6.9

Field Setting Abnormality

UA
Error Code
Method of Error
Detection
Error Decision Incorrect field setting
Conditions
Supposed
Causes
Troubleshooting
Turn the power supply off
once, and back on to restart.
177
Defective indoor unit PCB
Defective outdoor unit PCB
Defective power supply PCB
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
YES
controller connected to
one or more indoor
units?
NO
Is the remote
YES
controller wiring jumped
between indoor
units?
NO
NO
Is the field
setting correct?
YES
Do the service
NO
monitor LED (HAP)
on all indoor unit
PCB blink?
YES
NO
Does the system conduct
normal operation?
YES
Are the wirings
NO
between indoor unit and
outdoor unit correctly
connected?
YES
Is 220 ~ 240
VAC between No.1
YES
and 3 of the terminal
board for transmission
(indoor unit)?
NO
Are the wirings
NO
between indoor unit and
outdoor unit correctly
connected?
YES
SiBE121123_A
Connect the remote controller
correctly.
Remove the jumper.
Set the field setting correctly.
Connect the wirings correctly.
Check the power supply system
inside the indoor unit.
Could be incorrect wiring.
Check again.
Connect the wirings correctly.
Replace the indoor unit PCB.
Normal
(R17253)
Service Diagnosis