Convotherm OEB Series Service Handbook page 31

Service Handbook OEB/OES/OGB/OGS
 Service area excess temperature (Controls 10)  additional fan switches on
at 45°C and off at 41°C . On gas units the additional fan runs constantly, when
the unit is switched on.

Low water on pressure switch S1 12 of the solenoid valve Y4 (Steam
generating through water injection)  only in OES and OGS

No pressure on pressure switch S2 11 on the pressure side of the pump for
the cleaner and the nozzle rinsing solution in units with the CONVOClean
system.

Error code from the automatic firing 15 N20, N21, N22 only in OGB and OGS
Information:
When errors or disturbances occur during operation, the unit goes into error
operation as follows:

The buzzer 9 sounds,

All processes (oven lamp 1, fan motor 2, Convection heating 4, Convection
automatic firing 3, Steam generator heating 6, Steam generator automatic
firing 7, Steam generator pump 8 and all solenoid valves Y1, Y2, Y3, Y4
(Normal operation) as well as Y20, Y21, Y22, Y23 (CONVOClean system) are
switched off.

On the digital display the errors with error codes are shown and an additional
error description is given.

After confirming the errors with the "STOP" key, the user can continue working
with the Emergency programme.
Check:

Buzzer sounds for error codes

Error codes and additional error descriptions are displayed
Instructions:
With the help of the error code and trouble shooting list (Chapter 5) find and correct
error.
Cross reference:

Service Handbook Chapter 5. Trouble shooting and Error Codes Electronic
Notice (valid only for OGB and OGS):
If a gas unit has more than one burner, the controls for the automatic firing are on
the gas module (GM).
AS/11-2011 2_04_02e_Electronic safety switches_b
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