11.2 Indoor unit fault analysis
Fault E0: Indoor unit overcurrent protection
Check whether the power supply is present
and correct. Is this normal?
NO
Switch the supply and try again as soon as
this is normal again.
YES
Check all electrical connections. Are they
OK?
NO
Correct the electrical connections.
YES
Exchange the control boards of the indoor
unit.
Fault E1: Ambient air probe fault
Check the connection of the respective probe
to the circuit board. Are these correctly imple-
mented?
NO
Establish a proper connection.
YES
Check the resistance of the probe. Is the
measured value plausible? 15 k
W
at 25 °C.
NO
Replace the probe.
YES
Replace the respective control board.
Fault E2, E3: Outdoor unit / indoor unit heat exchanger probe fault
Check the connection of the respective probe
to the circuit board. Are these correctly imple-
mented?
NO
Establish a proper connection.
YES
Check the resistance of the probe. Is the
measured value plausible? 20 k
W
at 25 °C
NO
Replace the probe.
YES
Replace the respective control board.
REMKO BL series
36