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Error code E6/EC: Fault with DC motor output
Fault description: No motor recognised by control board, specific speed dif
ference between actual speed and
target speed.
Possible causes:
n The connection between the control board and motor is defective
n DC motor is defective
n Control board is defective
Is the fan roller jammed?
YES
Remedy blockage, replace motor
NO
Is the electrical connection between the control
board and motor defective?
YES
Establish electrical connection
NO
Is the power supply to the ceiling cassette
defective?
YES
Have the power supply checked/repaired by a
specialist company
NO
Is 310V DC present between the black and red
connecting line at contact CN24? Is 15V DC
present between the black and white connec-
tion?
YES
Replace the control board
NO
Connect motor to contact CN24 or repair the
connection. Supply power and set the fan to a
low fan setting. Check if faults are still present.
YES
Replace the control board
YES
Replace motor
Error code E7: EEPROM error
Is the EEPROM correctly mounted on the cir-
cuit board?
NO
Correctly mount the EEPROM on the circuit
board
YES
Replace indoor unit circuit board
Error code Ed: Outdoor unit fault
Read off the error code on the outdoor unit and search for the cause in the operating instructions for the
outdoor unit
REMKO MVD series
40
40


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