Daikin Sky Air R-407C Service Manual page 256

Error Codes: Indoor Units
1
Troubleshooting
3 3
4
5
3–26
To troubleshoot, proceed as follows:
connections of X20A
power supply on.
Check the voltage
Check indoor unit
Check the
and X26A.
Are X20A and
No
X26A properly
connected?
Yes
Unplug X26A
and switch the
between pins 1
and 3 of X26A.
Is there about
No
12 VDC?
Yes
fan motor and
motor wiring.
ESIE02–01
Connect X20A
and X26A
correctly.
Replace indoor
unit PCB.
Part 3 – Troubleshooting