CT ExprEss sTEp by sTEp opEraTion MANUAL • 54
troubleshooting
ERROR CODES
Error
Code
Error Call Out in Display Description of Error Possible Cause
E57 no rinse Water During rinse no water
fl ow is detected through
solenoid valve
— Water supply is shut off.
— Low water pressure.
— Check wiring to all components mentioned below.
— Flow switch is dirty or defective.
— Double water solenoid valve defective (y3.)
— relay board, high voltage, defective.
E88 Lower Gas ignition Failure ignition system has locked
out due to a failure to create
a consistent fl ame
— Hot surface ignitor not functioning.
— no gas supply.
— Flame sensor not functioning.
E89 Upper Gas ignition Failure ignition system has locked
out due to a failure to create
a consistent fl ame
— Hot surface ignitor not functioning.
— no gas supply.
— Flame sensor not functioning.
E92 Communication Error,
rb Does not properly
respond
Communication error
between display board and
relay board
— Faulty ribbon cable connections between boards.
— Faulty ribbon cable.
— relay board, low voltage, connector defective.
— Display board connector defective.
E93 Communication Error,
FroM Display board
Communication error
between display board and
low voltage relay board
— Faulty ribbon cable connections between boards.
— Faulty ribbon cable.
— relay board, low voltage, connector defective.
— Display board connector defective.
E94 Communication Error,
To Display board
Communication error
between display board and
low voltage relay board
— Faulty ribbon cable connections between boards.
— Faulty ribbon cable.
— relay board, low voltage, connector defective.
— Display board connector defective.
E98 rb is in Celsius and Db is in
Fahrenheit
Change the unit confi guration
in the setup menu
— Control programming issue.
— ribbon cable defective.
— relay board, low voltage, connector defective.
— Display board connector defective.
E99 rb is in Fahrenheit and Db
is in Celsius
Change the unit confi guration
in the setup menu
— Control programming issue.
— ribbon cable defective.
— relay board, low voltage, connector defective.
— Display board connector defective.
E100 Db version is not equal to
rb version. Error generated
by Db.
software update may have
failed.
— perform software update.
— ribbon cable defective.
— Faulty compact fl ash card.
— relay board, low voltage, connector defective.
— Display board connector defective.
— software may need to be updated again.
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