Potthof & Co 33kw, 24kw, 28kw manual Fault Finding

18.0 Fault Finding

Refer to Section 16.0 “Illustrated Wiring Diagram” for position of terminals and components

Central Heating - Follow operational sequence (do

Turn selector switch to		NO
The display illuminates
YES
Error 110 flashing		YES
Error 130 flashing
Error 133 flashing
NO
		YES
Error 20, 28 or 50 flashing
NO
		YES
Error 119 flashing
NO
Turn Central Heating		NO
thermostat to Maximum.
Pump runs
YES
		YES
Error 125 or 193 flashing
NO
		NO
3-way valve is open to Central
Heating circuit
YES
		NO
Fan runs
YES		NO
Fan runs at correct speed
YES
Spark at ignition electrodes for		NO
up to 5 seconds and for 3
attempts
YES
	NO

Go to section ‘A’

Turn the selector switch to	YES
reset position for 5 seconds
Go to section ‘E’
Go to section ‘C’
NO
Ensure all controls (and	YES
integral clock if fitted) are
calling for heat
Ensure that primary
circulation is OK & that
there is no blockage
Go to section ‘K’
Error 160 flashing
Go to section ‘D’
Error 160 flashing
Go to section ‘L’
	YES
Error 133 flashing
Go to section ‘F’

If the error 110 is still flashing.

Go to section ‘J’

Ensure controls are set to

demand and verify the

contacts are closed

Go to section ‘B’

Go to section ‘H’

Turn the selector switch to

reset

	YES
Burner lights

YES

NO

Burner output modulates to maintain the temperature set

Burner does not stay alights

after 5 seconds

Check the Central Heating

NTC sensor

Go to section ‘E’

Error 130 flashing

Go to section ‘M’

YES

Error 133 flashing Go to section ‘I’

YES

Burner goes out

YES

Fan stops after 10 seconds

YES

Pump continues to run for 3

minutes

(room thermostat open)

YES

Operation sequence

successful

© Baxi Heating UK Ltd 2012

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