Daikin Sky Air R-407C Service Manual page 293

ESIE02–01
Troubleshooting To troubleshoot, proceed as follows:
Part 3 – Troubleshooting
Is
the remote
YES
controller connected
to more than
one indoor
unit?
NO
Is
NO
the outdoor unit
used for Twin
system?
YES
Is the
setting of
NO
Pair/Twin/Triple
set
correctly?
YES
Are the
microcomputer
NO
normal montiors
(HAP) of all indoor unit
PCB
flashing?
YES
Are the
transmission
NO
normal montiors
(HBP) of all indoor unit
PCB
flashing?
YES
Turn the power off once, then
back on, and restart operation.
NO
Operating normally?
YES
Error Codes: System Malfunctions
Connect the remote controller
correctly.
Check setting "No. of Connected
Twin System Indoor Units" of indoor
unit.
Set correctly.
Is the
indoor-indoor
NO
and indoor-outdoor
Connect correctly.
wiring correctly
connected?
YES
Is the
NO
power supply
Connect correctly.
PCB correctly
connected?
YES
Is there
220-240 VAC
NO
between No.1 and
Replace the transformer.
No.3 of X2M
(indoor Unit)?
YES
Wiring could be incorrect, recheck.
Is the
indoor-indoor
NO
and indoor-outdoor
Connect correctly.
wiring correctly
connected?
YES
Indoor unit PCB replacement.
Operates normally.
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