Fault Finding - Potterton Puma Flowsure+ Installation & Service Instructions Manual

7. Fault Finding - Page 41
Before attempting any electrical fault finding, carry out a preliminary electrical test by checking: for short circuits, fuse failure,
incorrect polarity, earth continuity and resistance to earth. For replacement of fault component,
(see Section - Component Replacement). To assist in fault-finding, the logic sequence of the electronics control circuit precedes
the fault-finding charts.
Preliminary Actions:
Part No. 27/20334
A) Set Boiler Switch to Stand-by.
C) Set C.H. Temp Control to MAX.
E) Ensure all isolating valves at the base of the appliance are OPEN.
F) Turn ON EXTERNAL GAS & ELECTRICAL supplies.
G) Arrange for system controls to be calling for heat.
B) Set Heating Switch to 'OFF' (centre).
D) Turn OFF all Hot Water Taps.

Fault Finding 41