Troubleshooting - Fw 100; Troubleshooting Using The Display - Worcester CDi Combi N.G Service Booklet

TROUBLESHOOTING - FW 100

8 TROUBLESHOOTING - FW 100
BUS device faults are indicated.
If the controller shows Fault 12, the cylinder
temperature is so high that the cylinder High Limit
Thermal Cut-out has tripped.
B Reset the High Limit Thermal Cut-out.
8.1

TROUBLESHOOTING USING THE DISPLAY

9 12
h
3 24
h
6 720 613 462-17.1O
Fig. 16 Fault display
1 Fault number
2 BUS device which detected the fault and reported it to the
controller
3 Description of fault
4 Code or additional information about fault
Information displayed (
and 4 in fig.16)
Text
Fault 01
BUS communication fault
Fault 02
Internal fault
Fault 02
Internal fault
Some parameters reset to fac-
tory settings due to EEPROM
problem
Fault 02
Internal fault
FW 100 can no longer control
the heating system!
Fault 03
Room temp sensor faulty
Tab. 30
58
Supplied By www.heating spares.co Tel. 0161 620 6677
15
1
2
3
4
21
Pos. 1, 3
Code Cause
200 Boiler no longer reporting.
201 Incorrect BUS subscriber con-
nected.
42 Code switch on IPM in intermedi-
ate position.
43 Coding switch position has been
changed since initialisation phase.
100 ISM not responding.
205 Some parameters reset to default. Check parameter settings and readjust
255 FW 100 can no longer control the
heating system.
20 There is a circuit break on the room
temperature sensor built into the
FW 100.
21 There is a short circuit on the room
temperature sensor built into the
FW 100.
The current fault is displayed on the controller:
B Identify the BUS device affected by the current fault.
The fault can only be rectified on the BUS device from
which the fault originates.
Remedy
Check BUS device, BUS connection and
repair circuit break if necessary.
Identify and replace incorrect BUS
device.
Switch system off and correct coding.
Check BUS connection and repair cir-
cuit break if necessary.
them as necessary. Replace faulty con-
troller.
Replace faulty controller.
Replace faulty controller.
8 716 115 748 (2009/09)