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CT EXPRESS STEP BY STEP OPERATION MANUAL • 53
ERROR CODES
Error
Code
Error Call Out in Display Description of Error Possible Cause
E27
N8 Immersion Element
Temperature Too High
Immersion element too hot — Scale buildup inside steam generator and/or on water
level probe.
— Immersion element contactor stuck closed.
— Faulty N8 safety temperature probe.
E34
Steam Generator Drain
Pump Fault
Water level in steam
generator does not drop
during cleaning program
— Scale buildup inside the steam generator and/or
water level probe.
— Obstruction on inlet side of steam generator drain
pump.
— Boiler steam generator pump not being energized.
— Steam generator drain pump defective.
E36
Steam Temperature High Oven cavity temperature is
too high when operating in
steam mode or combination
mode
— Water supply is not connected or shut off.
— Low water pressure.
— Y1 solenoid valve not energized on a call for steam.
— Y1 solenoid faulty.
— Flow restrictor obstructed.
— Water injection pipe obstructed.
— Steam bypass hose obstructed.
— B5 steam bypass probe dirty or faulty.
E51
No Water In Boiler Steam generator fi ll error — Water supply is disconnected or shut off.
— Low water pressure.
— Boiler drain cap leaking or missing.
— Boiler drain pump defective.
— Drain pump elbow leaking.
— Fill solenoid not energized.
— Fill solenoid faulty.
— Connection/wiring error at the solenoid or the
relay board.
— Water level probe connection/wiring error at probe
or the relay board.
— Water level probe requires descaling and/or
replacement.
E53
Fan Motor High
Temperature
Fan motor high limit — Faulty motor high limit connection at relay board.
— Obstructed fan wheel.
— Faulty convection motor.
E54
Lower Fan Motor High
Temperature (20•20 unit
size only)
Fan motor high limit — Faulty motor high limit connection at relay board.
— Obstructed fan wheel.
— Faulty convection motor.
E55
Vent Not Open Browning valve does not open — Browning valve vent motor not being energized.
— Alignment issue between motor cam and vent
motor safety switch (micro switch).
— Faulty connection at vent motor, vent motor switch
or relay board.
— Fault vent valve safety switch (micro switch).
— Faulty vent motor.
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