HAMWORTHY HEATING LTD
23
SPETISBURY
500001118/C
12.0 FAULT FINDING
If the equipment still cannot be operated satisfactorily after following these instructions, consult Hamworthy
Heating Technical Department for assistance.
Parameter
Code
Lock Out Condition
0
Interrupted or short-circuited boiler FLOW
temperature sensor (NTC1)
Interrupted or short-circuited boiler RETURN
temperature sensor (NTC2)
1
1CA
1CB
1CC
Boiler FLOW temperature sensor (NTC1) higher
than lock out temperature.
Boiler RETURN temperature sensor (NTC2) higher
than lock out temperature.
Hot water tank temperature sensor (NTC3 - if
fitted) higher than lock out temperature.
2
1CG
1CD, 1CF
1CE, 1CH
Boiler FLOW (NTC1) and RETURN (NTC2)
temperature sensors have been exchanged.
Boiler FLOW (NTC1) and RETURN (NTC2)
temperature sensors are not equal in rest position.
Boiler FLOW (NTC1) and RETURN (NTC2)
temperature sensors are too high while running.
3
2BH, 2BI,
2BJ, 2BK
Too many gradient interventions at boiler FLOW
(NTC1) temperature sensor per heat demand.
4
No flame signal after all ignition attempts.
5
Flame error in operation.
6
Flame on in rest position.
7
Parameters programmed incorrectly.
8
1AH, 1AK
Fan not switched off when in stand-by.
9
1AI
Speed control is activated when in operation.
A
1AI
Fan does not start to run.
B
Parameters programmed incorrectly.
C
Gas valve not connected or defective.
D
Gas valve circuit test incorrect.
E
Mains voltage control problem.
F
Software fault/EMC interference.
H
Electronics module out of order.
Figure 12.1 - Status Display Lock Out Codes