Service manual

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E r r o r C o d E s • C o m b i t h e r m C t e x p r e s s t e C h n i C a l s e r v i C e m a n u a l • C – 4

ERROR CODES

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

failure on 20•20 unit

— Motor VFD not energized.