Service Manual GCM 642.0 ME/GES 642.0
27
For internal use only
Fault
Detection
Cause
Remedy
Burner goes off on
expiry of the ignition
time.
Fault light comes
on.
No gas.
Look for cause and remedy
(appliance connection tap open?).
Socket outlet not
properly earthed.
Ionisation does not
cut in.
Make the contact between the
connectors on the ionisation
electrode and the multi-pole
connector of the regulation and
control unit for the relevant burner.
Check to ensure that the ionisation
electrode does not rest on the
earth.
Controlling and
monitoring unit
defective.
Replace.
Fault light glows
when appliance
switched off.
Indicator light glows.
Turn connection earthed-pin plug by
180° and insert again.
Burners do not work
when first switched
on although power
available.
When appliance
switched on, the
relevant pilot light
comes on.
Fuse of the relevant
controlling and
monitoring unit
defective.
Replace fuse.
Intermittent spark
igniter cannot be
heard.
Connector loose or
no contact.
Check connectors on the
intermittent spark igniter on the
board and switch.
Intermittent spark
igniter defective
Replace intermittent spark igniter.
Controlling and
monitoring unit
defective
Replace controlling and monitoring
unit.
Burner switches off
at setting 12.
Fault light comes
on, burner switches
off.
Ionisation sensor
distance too small
Set ionisation sensor.
Burner switches off
and then on again.
Thermal relay
switches off.
Check saucepans and pans, renew
thermal relay, check injectors and
gas pressure.
Boiling time too long
(front cooking
zones).
Customer
complaint.
Saucepan bottoms
not flat, saucepan
too small.
It takes rougly 8 minutes to boil
1 litre of water (room temperature).
No function when
first switched on.
Pilot does not come
on.
No power in the
socket.
Look for cause and remedy.
Radio interference
suppression filter
defective.
Replace radio interference
suppression filter.
