Service - Alto-Shaam CT Express Installation Manual

Error Codes
If the Alto-Shaam® unit is not operating properly, check the following before calling an Authorized Alto-Shaam
Service Agent:
Check that the appliance is receiving power. Is the circuit breaker turned on?
This section is provided for the assistance of qualified and trained service technicians only and is not intended for
use by untrained or unauthorized service personnel. Do not attempt to repair or service the appliance 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.
When the appliance malfunctions, an error code will appear in the display.
Press the Start icon to acknowledge the error.
When the appliance error noti cation has been acknowledged, the appliance will attempt to return to normal operation.
Error Error Call Out in Display
Code
E01
Low Water Boiler
E02 Control Temperature High
E03
Convection Fan Motor Error
E04 Lower Convection Fan
Motor Error
MN-29805 • Rev 10 • 06/17 • Combitherm CT Express Installation Manual
NOTICE
Description of Error
Low water level in boiler
Relay board surface
temperature too high
Convection fan
motor failure
Lower convection fan motor
failure on 20-20 unit
Possible Causes
— Water supply is shut o .
— 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.
— Cooling fan(s) not being energized.
— Cooling fan(s) faulty.
— Wiring/connection error at cooling fan(s).
— Faulty relay board.
— Motor VFD not energized.
— No input signal to VFD from relay board.
— Motor VFD faulty, not outputting to motor a er input signal
received.
— Motor fan wheel blocked/obstructed.
— Connection/wiring error at VFD, motor, hall e ect sensor,
relay board.
— Faulty motor.
— Motor VFD not energized.
— No input signal to VFD from relay board.
— Motor VFD faulty, not outputting to motor a er input
signal received.
— Motor fan wheel blocked/obstructed.
— Connection/wiring error at VFD, motor, hall e ect sensor,
relay board.
— Faulty motor.

Service

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