Alto-Shaam COMBITHERM CTP20-20G - Page 78

CTP Combitherm
78
•
MN-35948
•
Rev 16
•
10/18
•
Combitherm® CT PROformance™ Series Operator’s Manual
Error
Code
Error Call Out in Display Description of Error Possible Cause(s)
E55 Vent Not Open (Lower vent on
dual vent system)
60 seconds a er the venting
motor is activated the vent
motor safety switch did not
open.
— Alignment issue between motor cam and vent motor safety
switch (micro switch).
— Faulty vent valve (motor).
— Faulty vent valve safety switch (micro switch).
E56 Vent 2 Not Open (Upper vent
on dual vent system)
60 seconds a er the venting
motor is activated the vent
motor safety switch did not
open.
— Alignment issue between motor cam and vent motor safety
switch (micro switch).
— Faulty vent valve (motor).
— Faulty vent valve safety switch (micro switch).
E57 No Rinse Water Flow switch for solenoid valve Y4
does not detect any water flow
for a minimum of 60 seconds.
— Water supply is shut o .
— Low water pressure.
— Flow switch is dirty or defective.
— Double water solenoid valve defective (Y3).
— Relay board, high voltage, defective.
E88 Lower Gas Ignition Failure
NOTE: If a er 2 attempts
to clear this error, the error
appears a third time, remove
the oven from service and
immediately contact an
Alto-Shaam authorized service
provider.
Reset output from Ignition
Module is ON
— Hot surface ignitor not functioning.
— No gas supply.
— Flame sensor not functioning.
— Faulty ignition control.
E89 Upper Gas Ignition Failure
NOTE: If a er 2 attempts
to clear this error, the error
appears a third time, remove
the oven from service and
immediately contact an
Alto-Shaam authorized service
provider.
Reset output from Ignition
Module is ON
— Hot surface ignitor not functioning.
— No gas supply.
— Flame sensor not functioning.
— Faulty ignition control.
E90 Lower Gas Combustion Blower
Not at Speed
Speed is too slow. — Power supply cable is not connected to blower motor.
— Speed control cable is not connected to blower motor.
— Blower motor is blocked, rotation is impeded, or motor is
faulty.
— Faulty control board.
E91 Upper Gas Blower Not at
Speed
Speed is to slow. — Power supply cable is not connected to blower motor
— Speed control cable is not connected to blower motor
— Blower motor is blocked, rotation is impeded, or motor is
faulty
— Faulty control board
E92 Communication Error
CB does not properly respond
Twelve (12) instances of no-
response from the relay board
(CB) to the display board (IB).
— Check CAN cable connections.
— CAN cable defective.
— Relay board, low voltage, connector defective.
— Display board connector defective.
E93 Interface Board (IB) and
Control Board (CB) are in
di erent states
The IB is in a di erent running
state than the CB for more than
20 seconds.
— Check CAN cable connections.
— CAN cable defective.
— Relay board, low voltage, connector defective.
— Display board connector defective.
E94 Communication Error,
TO Interface Board
No signal transfer for more
than 20 seconds between the
Interface Board (IB) and the
Control Board (CB).
— Check CAN cable connections.
— CAN cable defective.
— Relay board, low voltage, connector defective.
— Display board connector defective.
Error Codes
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