Potterton Promax HE Store Installation & Servicing Instructions Manual page 51

Refer to Section "Illustrated Wiring Diagram" for position of terminals and components
Central Heating - Follow operational sequence
Turn selector switch to
The display illuminates
YES
Error 110 flashing
Error 130 flashing
Error 133 flashing
NO
Error 20, 28 or 50 flashing
NO
Error 119 flashing
NO
Turn Central Heating
thermostat to Maximum.
Pump runs
YES
Eror 125 or 193 flashing
YES
3-way valve is open to
Central Heating circuit
YES
Fan runs
YES
Fan runs at correct speed
YES
Spark at ignition electrodes
for up to 5 seconds and for
3 attempts
YES
NO
Burner lights
YES
NO
Burner output modulates to
maintain the temperature
set
YES
Burner goes out
© Baxi Heating UK Ltd 2012
NO
Go to section A
YES
Turn the selector switch to
reset position for 5 seconds
YES
Go to section E
YES
Go to section C
NO
Ensure all controls and
NO
integral clock are calling
for heat
Ensure that primary
NO
circulation is OK & that
there is no blockage
NO
Go to section J
NO
Error 160 flashing
Go to section D
NO
Error 160 flashing
Go to section K
NO
Error 133 flashing
Go to section F
YES
Burner does not stay
alights after 5 seconds
Check the Central Heating
NTC sensor
Go to section E
Error 130 flashing
Go to section L
YES
Fan stops after 10
seconds
YES If the error 110 is still
flashing. Go to section I
Ensure controls are set to
demand and verify the
contacts are closed
YES
Go to section B
Go to section G
YES
Turn the selector switch to
reset
YES
Error 133 flashing
Go to section H
Pump continues to run for
YES
3 minutes
(room thermostat open)
YES
Operation sequence
successful
51