MN-35947
•
Rev 15
•
01/18
•
Combitherm® CT PROformance™ and CT Classic Series Installation Manual
•
77
Troubleshooting – Error Codes
Error
Code
Error Call Out in Display Description of Error Possible Cause(s)
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.
E100 One or more maintenance
reminder has timed out.
When any maintenance reminder has
expired without action having been
taken by the operator.
–
Enter maintenance reminder screen and address the item
that has timed out and reset
E101 Ventless Hood Fault - No
Pressure
If the power switch or pressure switch is
not closed.
– Check power switch is on.
– Check vent motor is turning in the proper direction.
– Pressure switch is miss wired or defective.
– Filter(s) require cleaning or replacement
E102 Ventless Hood Fault – Filters
Not Present
If the air filter switches are not closed.
– Check filters are installed and properly seated.
– Check filter switches are not damaged, defective or
dislodged.
E103 Option Board Doesn’t Send
Switch Setting
OB not communicating its switch
settings to the CB.
– Check CAN cable connection between OB and CB.
– Ensure CB dip switch is set to see an OB.
– Incompatible OB and CB so ware (update so ware).
– OB defective.
– CB defective.
E104 Option Board Not
Communicating
Option board is not communicating
with CB.
– Check option board CAN connection at CB and OB.
– Defective OB.
– Defective CB.
E105 No or Low Water Pressure Water pressure switch not activated.
– Water supply not connected.
– Water supply is shut o .
– Water supply to unit blocked or obstructed
– Faulty or miswired pressure switch
Error
Code
Error Call Out in Display Description of Error Possible Cause(s)
E106 Boiler Drain Pump Fault Hall e ect or rotational sensor is not
sending a signal to the relay board
– Drain pump motor not running or defective.
– Hall e ect sensor broken or incorrectly wired.
– Motor improperly wired.
E108 Cooling Fan Failure If the temperature on the control board
(relay board) is greater than 140ºF
(60ºC) and less than 176ºF (80ºC). (See
error code E02)
– Cooling fan damaged.
– Cooling fan blocked or blades have been kept from rotating.
– Incoming air temperature exceeds 100°F (38°C).
– Air inlet has become blocked.
E109 High Limit Switch
NOTE: Any oven experiencing
this error should be
investigated by an authorized
Alto-Shaam service provider.
The High Limit Switch input to the CB
(N7) is “open”
– Unit has experienced an over heat condition.
– Convection element contactors stuck closed.
– Failed Y1 solenoid.
– Obstruction between Y1 solenoid and injection pipe.
– Improperly connected drain.
– Condensate pan clean out not closed.
– Improperly wired high limit switch at the switch or at the
CB.
– Defective high limit switch.
E200 The SD card has been
detected to be larger than
2GB in size.
The SD card inserted is larger than 2GB
in size.
– SD card is larger than 2GB in size. Contact service to order
replacement SD card.
E210 VFD Under Voltage VFD has detected an under-voltage
situation.
– Possible VFD failure.
E211 VFD Over Voltage VFD has detected an over-voltage
situation.
– Possible VFD failure.
E212 VFD Overheating VFD has detected an overheat
situation.
– Unit has experienced an over heat condition.
– Defective high limit switch.
– Defective cooling fans.
– Possible VFD failure.
E213 Motor Over Current Motor over current detected.
– Blocked fan wheel.
– Possible VFD failure.
E214 VFD Current Peak VFD current peak detected.
– Possible VFD failure.
E215 VFD EEPROM Error VFD EEPROM error detected.
– Possible VFD failure.
E216 VFD Over Current VFD over current detected.
– Possible VFD failure.
E217 VFD Short Circuit VFD Short Circuit detected.
– Possible VFD failure.
E218 VFD Voltage Error VFD voltage does not correspond to
jumper settings.
– VFD voltage jumper is not correct.
– Possible VFD failure.
E220 Lower VFD Under Voltage Lower VFD has detected an under-
voltage situation.
– Possible Lower VFD failure.
E221 Lower VFD Over Voltage Lower VFD has detected an over-
voltage situation.
– Possible Lower VFD failure.
E222 Lower VFD Overheating Lower VFD has detected an overheat
situation.
– Unit has experienced an over heat condition.
– Defective high limit switch.
– Defective cooling fans.
– Possible Lower VFD failure.
E223 Lower Motor Over Current Lower Motor over current detected.
– Possible Lower VFD failure.
E224 Lower VFD Current Peak Lower VFD current peak detected.
– Possible Lower VFD failure.
E225 Lower VFD EEPROM Error Lower VFD EEPROM Error detected.
– Possible Lower VFD failure.
E226 Lower VFD Over Current Lower VFD over current detected.
– Possible Lower VFD failure.
E227 Lower VFD Short Circuit Lower VFD short circuit detected.
– Possible Lower VFD failure.
E228 Lower VFD Voltage Error Lower VFD voltage does not
correspond to jumper settings.
– Lower VFD voltage jumper is not correct.
– Possible Lower VFD failure.
E289 Unknown Error from VFD VFD has provided an unknown error.
– Possible VFD failure.
E290 Unknown Error from Lower
VFD
Lower VFD has provided an unknown
error.
– Possible Lower VFD failure.
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