FAULT FINDING
8
8.1
GENERAL
Befor
e looking for a fault condition, check that:
●
The mains electrical supply is tur
ned on.
●
The r
oom thermostat and clock (where fitted) are calling for heat.
Radiators are bled and free of air.
●
The gas ser
vice cock is open.
●
The system is at design pr
essure.
Before attempting any electrical fault finding, always conduct the
preliminary electrical system checks as described in the
Instructions for the British Gas Multimeter, or other similar
instrument.
On completion of any service or fault finding operation involving
making or breaking electrical connections, always check for
EARTH CONTINUITY, POLARITY and RESISTANCE TO EARTH.
Detailed procedures for replacing faulty components are
described in section 9 (Parts Replacement).
8.2
DIAGNOSTIC DIGITAL DISPLAY
F
ASCIA PANEL - Refer to Figure 33.
The Digital Display shows er
ror code ‘3’ in a lockout condition.
To RESET the boiler turn the control knob fully anti-clockwise to the
RESET/STAND-BY position and then back to anywhere between
the ‘+’ and ‘–‘ within TWO seconds.
8.3
FAULT FINDING CODES
In the event of the appliance failing to light, r
efer to the
Diagnostics Chart.
32
27
For fur
ther information contact: Halstead Boilers Ltd. Service Help
line: 01926 834834.
