T R O U B L E S H O O T I N G
CT EXPRESS STEP BY STEP OPERATION
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This section is provided for the assistance of qualified technicians only and is not intended for use by
untrained or unauthorized service personnel.
If your Alto-Shaam
®
unit is not operating properly, check the
following before calling your Authorized Alto-Shaam Service Agent:
☛
Check that unit is receiving power. Circuit breaker turned on?
Do not attempt to repair or service the oven beyond this point. Contact Alto-Shaam for the nearest
authorized service agent. Repairs made by any other service agents without prior authorization by
Alto-Shaam will void the warranty on the unit.
When the oven malfunctions, an error code will appear in the display.
PRESS THE START ICON TO ACKNOWLEDGE THE ERROR.
The icons that begin to flash represent operational modes that are still usable.
When the oven fault is corrected, the Combitherm will return to normal operation.
Error
Code
Error Call Out in Display
Description of Error
Possible Cause
E01
Low Water Boiler
Low water level in boiler
— Water supply is shut off.
— Low water pressure.
— Generator drain cap/hose missing or leaking.
— Generator drain pump is defective.
— Generator drain pump elbow leaking.
— Fill solenoid not energized.
— Fill solenoid faulty.
— Wiring or connection error at the solenoid or the
relay board.
— Water level probe connection/wiring error at probe
or relay board.
— Water level probe requires descaling and/or
replacement.
E02
Control Temperature High
Relay board surface
temperature too high
— Cooling fan(s) not being energized
.
— Cooling fan(s) faulty.
— Wiring/connection error at cooling fan(s).
— Faulty relay board.
E03
Convection Fan Motor Error
Convection fan motor failure
— Motor VFD not energized.
— No input signal to VFD from relay board.
— Motor VFD faulty, not outputting to motor after input
signal received.
— Motor fan wheel blocked/obstructed.
— Connection/wiring error at VFD, motor, hall effect
sensor, relay board.
— Faulty motor.
E04
Lower Convection Fan Motor
Error
Lower convection fan motor
FAILUREONsUNIT
— Motor VFD not energized.
— No input signal to VFD from relay board.
— Motor VFD faulty, not outputting to motor after input
signal received.
— Motor fan wheel blocked/obstructed.
— Connection/wiring error at VFD, motor, hall effect
sensor, relay board.
— Faulty motor.
E05
VFD Comm Failure
VFD communications have
stopped
— Loss of power to VFD.
— VFD malfunction.
— CAN cable disconnected.
— CAN address not correct on VFD.
E R R O R C O D E S
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