Fault Finding Guide - Potterton Kingfisher Mf Installation & Service Instructions Manual

6. Fault Finding Guide

If Red LED is 'ON' and the Boiler fails to work check the following:
Electrical Plugs (PL1 to PL6) are to remain connected to the Circuit Board for Fault Finding checks.
ALL Electrical Power to the Heating System OFF - NO External Call for Heat (Thermostat & Programmer OFF)
Boiler Temperature Knob Set to'0' (Fully anti-clockwise 'click' OFF) - Gas & Water Connections Turned ON
Main Supply Voltage is between 196Vac & 253Vac.
Replace
F2 fuse
with fuse
of the
correct type
32 Fault Finding Publication No. 5102977