Troubleshooting – Error Codes
48
MN-29805 • Rev 11 • 07/18 • Combitherm CT Express Installation Manual
Error
Code
Error Call Out
in Display
Description of Error
Possible Cause(s)
E51
No Water In Boiler
Steam generator fill
error
– Water supply is disconnected or shut off.
– Low water pressure.
– Boiler drain cap leaking or missing.
– Boiler drain pump defective.
– Drain pump elbow leaking.
– Fill solenoid not energized.
– Fill solenoid faulty.
– Connection/wiring error at the solenoid or the relay board.
– Water level probe connection/wiring error at probe or the
relay board.
– Water level probe requires descaling and/or replacement.
E53
Fan Motor High
Temperature
Fan motor high limit
– Faulty motor high limit connection at relay board.
– Obstructed fan wheel.
– Faulty convection motor.
E54
Lower Fan Motor High
Temperature
(20-20 unit size only)
Fan motor high limit
– Faulty motor high limit connection at relay board.
– Obstructed fan wheel.
– Faulty convection motor.
E55
Vent Not Open
Browning valve does
not open
– Browning valve vent motor not being energized.
– Alignment issue between motor cam and vent motor safety
switch (micro switch).
– Faulty connection at vent motor, vent motor switch or relay
board.
– Fault vent valve safety switch (micro switch).
– Faulty vent motor.
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.
Содержание CT Express Combitherm CTX4-10E
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