Rectifying Faults; Indication Of Faults; Summary - Worcester CDi Combi N.G Service Booklet

7

RECTIFYING FAULTS

7.1

INDICATION OF FAULTS

Faults are indicated simultaneously by a letter code in
the display and by flashing of the fault indicator LED.
This helps to identify and eliminate the cause of the fault
quickly and reliably.
The fault codes displayed are grouped into four
categories:
• Category 1:
The appliance is disabled until it has been switched
off and then on again.
• Category 2:
The appliance is disabled until the cause of the fault
has been eliminated.
• Category 3:
The appliance continues to operate with limited
function.
• Category 4:
The appliance is disabled and locked (button reset
and fault indicator LED are flashing) until the cause of
the fault has been eliminated and the appliance
unlocked
Unlocking the appliance:
B Press the reset button for 3 seconds and
release it. After releasing the appliance
re-starts. (See also section 3.1).
7.2

Summary

7.2.1 APPLIANCE FAULTS
Appliance faults
A1
A5
A6
A7
A8
b1
C6
CC
d5 CDi HF & FS
d6 CDi HF only
E2
E9
EA
F0
F7
FA
Fd
8 716 115 748 (2009/09)
Supplied By www.heating spares.co Tel. 0161 620 6677
1
29
3 30
2 31
3
32
2 33
2
35
2 36
2 37
2 38
2
39
2 40
4
41
Tab. 12 Programmer faults
4 44
2/4
48
4
49
4
50
4
51
7.2.2 Faults that are not displayed
Appliance faults
Excessive burner noise, rumbling
noises
Flow noises
Heating up of last radiators in
system too slow
Flue gas levels incorrect, CO level
too high
Ignition too harsh, ignition poor
Condensation in the flue pipe
Inadequate hot water outlet
temperature (combi boiler)
Tab. 10 Undisplayed faults
CONDENSATE PUMP (Floor standing appliances)
- OPERATING LIGHTS AND FAULT CONDITIONS
Ready for operation = Steady green light
Fault = Steady red light
Pump running = Flashing green light
Operating lights Cause
Green Red
Off Off Mains power
missing
Flashing Flashing Dry - run
(possible air
in system)
On Flashing Pump blocked Inspect tank
On On Level exceeds
alarm level
Off Flashing Pump blocked
and alarm
level
exceeded
Tab. 11 Condensate pump
Programmer faults
Set room temperature not reached
Set room temperature exceeded by a large
amount (230V on/off room stat)
Excessive fluctuations in room temperature
RECTIFYING FAULTS
50
50
51
51
52
53
54
Solution
Insert plug
Check mains
and fuse
Pump starts
automatically
after 1 minute
pump inlet
remove dirt
Pressure hose /
non return valve
blocked (clean
or unkink)
Inspect tank
pump inlet
remove dirt
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