Glow-worm Inset 40BBU - Manual (Page 23)

23 221722B
9 Fault Finding
Diagram 9.2 FUNCTIONAL FLOW
7427
br BROWN
b
BLUE
w WHITE
KEY
bk BLACK
or ORANGE
3 WAY SOCKET CONNECTIONS
PCB CONNECTIONS
SPARK
ELECTRODE
HV
CN4
CN3 EV2
TH
FUSE
TYPE
F1A
br
b
N
L
bk
w
w
CONTROL THERMOSTAT
PILOT SOLENOID
LINK (OVERHEAT THERMOSTAT
IF FITTED)
MAIN SOLENOID
br
b
b
or
TH
CN3 EV1
CN5
N
9.2 Thermocouple
To test the thermocouple, a meter with a range of
0 - 30mV is required together with a thermocouple interrupter
test unit.
9.3 Electrical Fault Finding Back Boiler
Refer to diagram 9.1.
9.4 Flue Blockage Safety Device and Ignition
Fault Finding
To check the safety device and ignition, refer to fault finding
chart, diagram 9.1.