Convotherm OEB Series Service Handbook page 233

Service manual OEB/OES/OGB/OGS
OEB OES OGB OGS Defect
5.6 Electronics (see also General)
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5.7 Safety temperature limiter hot air heater (B7)
KD / 31.03.2009
5.6.1 Displayed oven
temperature does not agree with
the actual oven temperature
5.6.2 Time or temperature value
set changes up or down all by
itself after being set
5.6.3 Temperature displays are
not correct: the higher the
temperature on the sensor, the
lower the temperature value
displayed
5.6.4 Electronics can be
operated normally, but appliance
is not working
5.6.5 Software hangs due to
buttons having been pressed
quickly several times
5.7.1 Safety temperature limiter
(B7) has tripped.
5.7.2 Safety temperature limiter
B7 is reacting too early.
Possible cause or remedy
•
Short circuit of the B6 sensor wiring
•
Check polarity of the B6 sensor
(green/white)
•
Movement of the selector dial was not
correctly recognised by the electronics
Move selector dial briefly in same direction
•
Photosensor and receiver have no contact
with one another
•
Polarity incorrect
leads of the sensor in question (green and
white wires must not be reversed)
•
Appliance is set to dummy version
•
Main contactor defective
•
see also point 5.5
•
Re-install software by pressing the On / Off
button for 5 secs. or by disconnecting from
the power supply for 10 secs.
•
Inner chamber temperature was over 300 °C
Heater contactor is burnt together
Replace contactor
•
Check polarity of the B6 sensor
(green/white)
•
B7 defective
•
5_00d_Fehlersuchliste_h_En.doc
Align position
Check the connection
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