74
•
MN-35947
•
Rev 15
•
01/18
•
Combitherm® CT PROformance™ and CT Classic Series Installation Manual
Troubleshooting – Error Codes
Error
Code
Error Call Out in Display Description of Error Possible Cause(s)
E11 Convection Temperature High In Combination program, cavity
temperature N6 is measuring in excess
of 572ºF (300ºC) for a minimum of 25
seconds
In Convection program, cavity
temperature N6 is measuring in excess
of 572ºF (300ºC) for a minimum of 25
seconds
– Check wiring to all components mentioned below.
– Steam element contactor locked/on.
– N6 oven cavity temperature probe is defective.
– N6 oven cavity temperature probe wires connected
backwards
– Relay board, high voltage, defective.
E13 Boiler Temperature High Boiler temperature is more than 248ºF
(120ºC) for more than 25 seconds,
detected by B4 Probe
– Calcium build up in boiler
– Check wiring to all components mentioned below.
– Steam element contactor locked/on.
– B4 boiler temperature probe is defective.
– B4 probe wires connected backwards
– Water level probe has calcium build up.
E15 Condensor Temperature High Condensor water temperature is more
than 212ºF (100ºC) for more than 180
seconds, detected by B3 probe
– Water supply is shut o .
– Check wiring to all components mentioned below.
– B3 condensor temperature probe is defective.
– B3 condensor probe wires connected backwards
– Single water solenoid valve defective (Y2).
– Relay board, high voltage, defective.
E20
B11 Core Temperature Probe
Single Point Fault
Single point core temperature probe
defective or disconnected
– Clean probe receptacle pins with sand paper.
– B11 Single Point Core Temperature probe with quick
connect defective.
– B11 Single Point Core Temperature probe wires with quick
connect disconnected.
– B11 Single Point Core Temperature probe receptacle
defective.
– B11 Single Point Core Temperature probe receptacle wires
disconnected.
E21 N6 Cavity Probe Fault Cavity temperature probe defective or
disconnected
– N6 oven cavity temperature probe defective.
– N6 oven cavity temperature probe wires.
E22 B10 Core Temperature Probe
Multi-point Fault
Multipoint core temperature probe
defective or disconnected
– B10 multipoint core temperature probe defective.
– B10 multipoint core temperature probe wires disconnected.
E23 B4 Boiler Probe Fault Boiler temperature probe defective or
disconnected
– B4 boiler temperature probe defective.
– B4 probe wires connected backwards.
E24 B5 Bypass Probe Fault Bypass steam temperature probe
defective or disconnected
– B5 bypass steam temperature probe defective.
– B5 bypass steam temperature probe wires connected
backwards.
E25 B3 Condensor Probe Fault Condensor water temperature probe
defective or disconnected.
– B3 condensor temperature probe defective.
– B3 condensor probe wires connected backwards.
E26 B10 - Point 1 - Core
Temperature Probe Multipoint
Fault
Multipoint core temperature probe
defective or disconnected.
–
B10 Multipoint Core Temperature probe defective.
–
B10 Multipoint Core Temperature probe wires disconnected.
E27 B10 - Point 2 - Core
Temperature Probe Multipoint
Fault
Multipoint core temperature probe
defective or disconnected.
– B10 Multipoint Core Temperature probe defective.
– B10 Multipoint Core Temperature probe wires disconnected.
E28 B10 - Point 3 - Core
Temperature Probe Multipoint
Fault
Multipoint core temperature probe
defective or disconnected.
– B10 Multipoint Core Temperature probe defective.
– B10 Multipoint Core Temperature probe wires
disconnected.
E29 B10 - Point 4 - Core
Temperature Probe Multipoint
Fault
Multipoint core temperature probe
defective or disconnected.
– B10 Multipoint Core Temperature probe defective.
– B10 Multipoint Core Temperature probe wires
disconnected.
E34 Steam Generator Drain Pump
Fault
If water level does not drop below lower
water level probe a er three minutes
when steam generator drain pump is
activated in cleaning program.
– Calcium build up in steam generator drain pump.
– Boiler drain pump defective.
– Relay board, high voltage, defective.
– Water level probe defective.
Error
Code
Error Call Out in Display Description of Error Possible Cause(s)
E36 Steam Temperature High In Steam program, cavity temperature
N6 is measuring in excess of 395ºF
(200ºC) for more than 60 seconds.
In Combination program, cavity
temperature N6 is measuring in excess
of 520ºF (270ºC), for more than 60
seconds.
In Retherm program, cavity
temperature N6 is measuring in excess
of 395ºF (200ºC), for more than 60
seconds.
In Cleaning program, cavity
temperature N6 is measuring in excess
of 395ºF (200ºC), for more than 60
seconds.
– Water supply is shut o .
– Low water pressure.
– Water injection pipe, calcium build up.
– Water flow valve defect or calcium build up.
– Double water solenoid valve defective (Y1).
– Relay board, high voltage, defective.
E40 B3 Fault B3 probe shorted to ground – Defective or miswired probe.
E41 B4 Fault B4 probe shorted to ground – Defective or miswired probe.
E42 B5 Fault B5 probe shorted to ground – Defective or miswired probe.
E43 N6 Fault N6 probe shorted to ground – Defective or miswired probe.
E44 N8 Fault N8 probe shorted to ground – Defective or miswired probe.
E45 B10 Fault B10 probe shorted to ground – Defective or miswired probe.
E46 B10 - Point 1 Fault B10 probe shorted to ground – Defective or miswired probe.
E47 B10 - Point 2 Fault B10 probe shorted to ground – Defective or miswired probe.
E48 B10 - Point 3 Fault B10 probe shorted to ground – Defective or miswired probe.
E49 B10 - Point 4 Fault B10 probe shorted to ground – Defective or miswired probe.
E51 No Water In Boiler Lower water level probe B2 is not
satisfied within 5 minutes, a er water
solenoid valve Y1 is activated
– Water supply is shut o .
– Low water pressure.
– Boiler drain cap missing.
– Boiler drain pump defective.
– Drain pump elbow leaking.
– Water level probe has calcium build up.
– Double water solenoid valve defective (Y1).
– Relay board, high voltage, defective.
E53 Fan Motor High Temperatures Fan motor does not spin, result in over-
heating, detected by motor coil safety
thermo element. Temperature more
than 320°F (160°C).
– Motor high limit open or wired incorrectly.
– If LED on motor control flashes, see error codes for motor
control.
– Motor or fan wheel locked.
– Fan wheel damaged.
E54 Lower Fan Motor High
Temperature
Lower fan motor does not spin, result
in over-heating, detected by motor coil
safety thermo element. Temperature
more than 320°F (160°C).
– Motor high limit open or wired incorrectly.
– If LED on motor control flashes, see error codes for motor
control.
– Motor or fan wheel locked.
– Fan wheel damaged.
E55 Vent Not Open (Lower vent on
dual vent system)
60 seconds a er the venting motor is
activated the vent motor safety switch
did not open.
– Alignment issue between motor cam and vent motor safety
switch (micro switch).
– Faulty vent valve (motor).
– Faulty vent valve safety switch (micro switch).
E56 Vent 2 Not Open (Upper vent
on dual vent system)
60 seconds a er the venting motor is
activated the vent motor safety switch
did not open.
– Alignment issue between motor cam and vent motor safety
switch (micro switch).
– Faulty vent valve (motor).
– Faulty vent valve safety switch (micro switch).
E57 No Rinse Water Flow switch for solenoid valve Y4
does not detect any water flow for a
minimum of 60 seconds.
– Water supply is shut o .
– Low water pressure.
– Flow switch is dirty or defective.
– Double water solenoid valve defective (Y3).
– Relay board, high voltage, defective.
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