Troubleshooting for SkyAir Indoor Unit Si18-525B
356 Troubleshooting
5.14 Malfunction of Field Setting Switch
Remote
Controller
Display
UA
Applicable
Models
FFQ, FCQ, FBQ, FHQ
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Incorrect field setting
Supposed
Causes
Indoor-Outdoor (BP) transmission line
Faulty remote controller wiring
Troubleshooting
Are
the wirings
between indoor
and BP unit
correctly
connected?
NO
Do the
microcomputer
normal monitors HAP
on all indoor unit PCB
blink?
NO
NO
Connect correctly.
Could be incorrect wiring.
Check again.
Connect correctly.
Normal
Set correctly.
Check the power supply
system inside the indoor unit.
Replace the indoor unit
PCB.
Is
the field setting
for pair /
twin system
correct?
Does the
system conduct normal
operation?
YES
YES
YES
YES
NO
YES
Turn the power supply off once,
and back on to restart.
Are wirings
between indoor and
BP unit correctly
connected?
NO
NO
Is 220 ~ 240
VAC between No.1 and 3
of X2M terminal
(indoor unit)?
YES
YES
Connect the remote controller
correctly.
Is the
remote controller
connected to one or more
indoor units?
NO
YES
Remove the jumper.
Is
the remote
controller wiring jumped
between indoor
units?
NO
(Q0401)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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