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MN-29805 • Rev 10 • 06/17 • Combitherm CT Express Installation Manual
Service
Error
Code
Error Call Out in Display
Description of Error
Possible Causes
E57
No Rinse Water
During rinse no water
flow 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.
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 configuration
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 configuration
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.
Soft ware update may
have failed.
— Perform soft ware update.
— Ribbon cable defective.
— Faulty compact flash card.
— Relay board, low voltage, connector defective.
— Display board connector defective.
— Soft ware may need to be updated again.
Error Codes
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