Fault Finding - Potterton Promax 15 HE Installation & Service Instructions Manual

Is On/Off switch
On ?
YES
Does the fan
run ?
YES
Does a spark
occur ?
YES
Does the burner
light ?
YES
Does the burner
stay alight ?
Please Check Following Points Before
Going Through The Fault Finding Chart.
- Check electrical system earth continuity,
short circuit, resistance to earth, fuse failure
and a minimum voltage of 195 is present at
input connections on boiler, check internal
fuse is OK, unit is not in lockout.
- There is an adequate gas supply pressure
at the inlet. A minimum pressure of 18.1 mb
is required at the inlet.
- All isolating valves are open and both the
boiler and the system are vented.
- Check installation is correct, including the
flue system.
38
NO
Switch On/Off switch on.
NO
Go to
NO
IGNITION LOCKOUT
section of the fault
finding instructions.
Go to
NO
IGNITION LOCKOUT
section of the fault
finding instructions.
Go to
NO
IGNITION LOCKOUT
section of the fault
finding instructions.

14.0 FAULT FINDING

NO
Is there 230V
sL to N ?
YES
Is 230V
NO
P/F to N at any
time in a period of
4 minutes ?
YES
Is 230V
NO
P/F to N for 5 seconds
every 3 minutes ?
YES
Is 230V
NO
P/F to N for 1 minute
every 4 minutes ?
Go to
NO SWITCHED LIVE
section of the fault finding
instructions.
Go to
NO PUMP FEED
section of the fault finding
instructions.
Go to
DRY-FIRE LOCKOUT
section of the fault finding
instructions.
Go to
NO FAN RUN
section of the fault finding
instructions.
Publication No. 5106451