Potterton Promax SL User Manual page 5

Is the Timer ON and
calling for heat ?
12
Typical
6
examples of
external timer
CH OFF
CH ON
NO
Ensure timer is set for Central
Heating ON (see any
instructions supplied with timer)
If you don't know what you need to do
to get the boiler to light, or need help
with the system and controls, contact
your installer as soon as possible
© Baxi Heating UK Ltd 2007
YES
2.0 Troubleshooting
Is the Room Thermostat (if
fitted) set high enough ?
NO
15
Turn Room Thermostat
to maximum setting
(typical example shown)
15
YES
5