Owner's manual

ManualsBrandsGlow-worm ManualsWater boilerBBU 45/4

2000225023C

9 Fault Finding

Diagram 9.1

9605

9.1 Electrical

Carry out the preliminary electrical system checks as

contained in a multimeter instruction book.

NOTE. If the electrical supply is switched rapidly off and on

without gas present the control will purge for 100 sec. Neither

of the indicators will be lit. The appliance will then operate

correctly.

Is there 230v ac

across Blue and

Brown at

(Connector X1)

Is fuse blown

on spur

Check plug

connection & wiring

Does spark start

after 5 seconds

Check ignition

lead connection

Remake

connection

Check thermistor

is not open circuit

Check PCB

fuse

Is O/H link

circuit open

Check that there is

200V dc between

Blue & Brown

(Connector X2)

Does the pilot

light

Replace PCB

Replace fuse

Replace thermistor

Replace PCB

Replace Gas Valve

Does detection

occur prior to

Lockout

Check polarity

of supply

Are ignition & sense

correctly connected

at the pilot

Replace Gas valve

Replace PCB

Check that there is

100V dc between

Blue & Black

(Connector X2)

Does the Main

burner light

Replace PCB

System operating

satisfactorally

Yes