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CT EXPRESS STEP BY STEP OPERATION MANUAL • 52
troubleshooting
Error
Code
Error Call Out in Display Description of Error Possible Cause
E11
Convection Temperature
High
Oven cavity temperature N6
too high
— Convection element contactor stuck closed/on.
— Faulty oven temperature probe connection at relay
board.
— Faulty N6 oven temperature probe.
— Faulty relay board.
E13
Boiler Temperature High Steam generator temperature
too hot
— Immersion element is not submersed in water due
to scale build up on the water level probe/inside
the tank.
— Immersion element contactor stuck closed.
— Faulty B4 steam generator temperature probe
connection at relay board.
— Faulty B4 temperature probe.
E15
Condensor Temperature High Condensor water
temperature too high
— Untreated water supply line is disconnected or
shut off.
— Cooling solenoid is not being energized when B3
probe is above set point.
— Faulty B3 condensate temperature probe
connection at relay board.
— Faulty B3 condensate temperature probe.
E20
HACCP Only - B11 Core
Temperature Probe Single
Point Fault
Error E20 is not shown in display.
Instead a probe sign with “?” is
shown as popup window. In case
the customer cooks in time mode
during fi rst step and during second
step switches to probe mode but has
no probe in place, the error E20 will
be shown in the error code list and
HACCP list.
Single point core temperature
probe defect or disconnected
— Probe not installed inside oven.
— Faulty B11 Single Point Core Temperature probe
receptacle connection at relay board.
— Faulty B11 single point core temperature probe.
— Debris buildup on probe receptacle pins inside of
the oven.
E21
N6 Oven Cavity Temperature
Probe Fault
N6 probe “open” — Faulty N6 oven cavity temperature probe
connection at relay board.
— Faulty N6 oven temperature probe.
E22
B10 Core Temperature Probe
Multipoint Fault
Multipoint core temperature
probe defect or disconnected
— Faulty B10 multipoint core temperature probe
connection at relay board.
— Faulty B10 multipoint core temperature probe.
E23
B4 Boiler Probe Fault B4 probe “open” — Faulty B4 boiler temperature probe connection at
relay board.
— Faulty B4 boiler temperature probe.
E24
B5 Bypass Probe Fault B5 probe “open” — Faulty B5 steam bypass probe connection at
relay board.
— Faulty B5 steam bypass probe.
E25
B3 Condensor Probe Fault B3 probe “open” — Faulty B3 condensor probe connection at relay
board.
— Faulty B3 condensor probe.
E26
N8 Immersion Element
Safety Probe Fault
N8 probe “open” — Faulty N8 safety temperature probe connection at
relay board.
— Faulty N8 safety temperature probe.
ERROR CODES
(Continued on next page)