Glow-worm Hideaway 40CF - Manual (Page 22)

22 221807B
Re-connect boiler flue blockage
safety device to points A and B.
Disconnect thermocouple at
connection point D of the gas valve.
Test continuity between point C and the
body of the gas valve.
Is there continuity?
Test continuity of thermocouple between inner
connection point D and point E.
Is there continuity?
Faulty boiler flue blockage
safety device, renew.
Thermocouple and boiler flue blockage
safety device circuit satisfactory.
NO
YES
YES
Faulty flue blockage safety device
connectors into gas valve,
either at A or C.
Renew where faulty.
Faulty thermocouple, renew.
With the boiler cold, check connections of the thermocouple, boiler flue blockage safety device
and gas valve. Reset flue blockage safety device.
Disconnect flue blockage safety device connectors at points A and B at the gas valve,
see diagram Interrupter Electrical Connections.
Test continuity of the flue blockage safety device. Is there continuity?
YES
NO
NO
10 Fault Finding - Thermocouple
2327/B
Diagram 10.3
THERMOCOUPLE AND FLUE BLOCKAGE SAFETY DEVICE
FAULT FINDING
FLUE BLOCKAGE SAFETY DEVICE
CONNECTION "D"
POINT "C"
GAS VALVE
5031
INTERRUPTER ELECTRICAL
CONNECTIONS
Diagram 10.5
CONNECTION "A"
CONNECTION "B"
CONNECTION "E"
Closed Circuit Voltage (millivolts)
Open Circuit Voltage (millivolts)
0 2 4 6 8 10 12 14 16 18 20 22
9
11
13
15
17
19
21
23
25
27
29
A B C
Diagram 10.4
DIAGNOSIS GRAPH FOR
THERMOCOUPLE CIRCUIT
1546