Strebel 40S-70, Installation Manual

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26
Maintenance
Boiler maintenance
Troubleshooting
Maintenance
(Heating to ‘OFF’)
Door closure bolts
The door closure bolts must be
oiled regularly.
Sealing integrity of the doors
If smoke escapes through the
doors, this is due to poor sealing
caused by the sealing material
yielding. The doors are
adjustable on both the hinge and
the closure sides and the sealing
integrity can therefore be
restored.
Sealing integrity of the gas
venting flap
The gas venting flap must lay
tightly against the frame for
proper, low-emission operation.
Sealing integrity of the O
2
probe
The screw fitting of the O
2
probe
must be checked for tightness (if
necessary
carefully retighten).
Safety devices
The reliability performance of the
safety devices must be checked
once a year by the heating
installer or by another authorised
person. The safety valve and the
thermal discharge safety device
must be checked. It is
recommended to take out a
service contract with a specialist
firm!
Troubleshooting
The control recognises
malfunctions automatically and
executes malfunction-related
alternative programs or safety
measures.
There are two malfunction
categories: the ‘malfunction’
indicator either
lights up
continuously or it blinks .
‘Malfunction’ indicator lights
up continuously
In the case of the following
malfunctions, the
continuation
resp. switching on of the heating
function is
not possible and the
malfunction indicator is activated
automatically:
Safety temperature limiter has
tripped
STL tripped
Reset!
Cause: boiler temperature is too
high (no heat consumption,
power failure, pump or valve
defective). After the boiler
temperature has dropped to
approx. 80

C due to heat
consumption, the STL is reset by
pressing the restart switch, thus
automatically acknowledging the
malfunction.
Measured values of the
exhaust fume temperature are
incorrect
Exhaust fume
temperature
Measured values wrong
Causes: plug contacts, sensor
cable, control, exhaust fume
sensor. After rectification of the
malfunction it will be
acknowledged by pressing the
‘Arrow’ button.
Measured values of the boiler
temperature are incorrect
Boiler temperature
Measured values wrong
Causes: plug contact, sensor
cable, control,boiler temperature
sensor. After rectification of the
malfunction it will be
acknowledged by pressing the
‘Arrow’ button.
Loss of control data
Data loss
Control defective
Cause: data memory in the
control is defective. The control
must be repaired by the
manufacturer.
‘Malfunction’ indicator blinks
In the case of the following
malfunctions, the
continuation
resp. the switching on of the
heating function respectively is
possible until the malfunction
has been rectified:
The malfunction message is
shown on the text display in the
operating mode ‘Heating OFF’
and after the ‘Arrow’ button is
pressed:
Measured oxygen values are
incorrect
Oxygen
Measured values wrong
Causes: plug contact, probe
cable, O
2
probe dirty/worn or
screw fitting of the O
2
probe and
protective tube is loose, control.
Check the O
2
probe by means of
the aggregate test.
If the result of the aggregate test
is ‘Probe OK’, then the
malfunction is automatically
deleted.
Important instruction:
Only perform the aggregate test
if there is no fire or residual
embers in the boiler.