Daikin EHYHBH05AAV3 Service Manual page 88

Error Codes: Gas Condensing Boiler
1
3
4
5
Part 4 – Troubleshooting
Error
Cause
code
5 Poor flame signal.
6 Flame detection fault.
8 Incorrect fan speed.
29, 30 Gas valve relay fault.
Possible solution
Condensate drain blocked.
Check adjustment of gas valve.
Replace ignition cable and spark plug cap.
Replace ignition unit.
Replace boiler controller.
Fan catching on casing.
Wiring between fan and casing.
Check wiring for poor wire contact.
Replace fan.
Replace boiler controller.
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