Fault Finding Solutions Sections F To H - Potterton Assure System Series Installation And Service Manual

Fig.60 Solutions sections F to H
F
Check and correct if necessary
1. Ignition electrode and lead
2. Electrode connection
3. Spark gap and position
G
1.
Check supply pressure at the
gas valve:-
Natural Gas - Minimum 17 mbar
2.
Check and correct if necessary
1. The set of the gas valve
(CO values - see instruction)
2
2. Flame sensing electrode and lead connections
3. Flame sensing electrode position
Replace flame sensing electrode or PCB
H
Safety thermostat operated
or faulty
10.2.3

Fault finding solutions sections F to H

YES
Check wiring - see Electrical
Wiring Diagram page 18
YES
Check for and correct any
system faults
NO
Allow to cool. Continuity
across thermostat terminals
more than 1.5 ohm
NO
Check Flow & Return Sensors
- see section 'D'
NO
Replace PCB
YES
Replace safety thermostat
YES
Is 110 still flashing ?
YES
Replace PCB
10 Troubleshooting
PN-0000318
59