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F
AULTS
6.5
Remedying faults without message
P
ROBLEM
The control panel
works normally but
the unit does not
respond.
The unit does not
work, the display is
blank, and the con-
trol panel LED is not
lit.
One fan does not
work.
The fans do not
operate at a certain
strength.
52
If you suspect a fault but no fault message is displayed:
1. Using section
2. Try to resolve the problem using the below table. No tech-
L
IKELY CAUSE
The unit is control-
led by a signal from
an external control.
The fans are dead.
The unit is dead.
The connection
between the control
panel and the printed
circuit board is not
correct.
The printed circuit
board does not
work: the LEDs on
the printed circuit
board are not lit.
The control panel is
defective.
The fan is dead or
defective.
The connection to
the relevant tap is
not correct.
6.2
check if you can easily resolve the
problem yourself.
nical expertise is needed for this.
W
HAT TO DO
1. Check if
or
is displayed in the control panel.
2. Check the setting nos. 60, 61 and 76 at the installer's
level (see section 4.5).
1. Check the transformer fuse.
2. Check the wiring between the transformer and the
fans (connectors X120 and X130).
3. Replace the transformer.
1. Check the power connections and wiring.
1. Check the control cable.
2. Check wiring between connector plate and printed
circuit board (connectors X380 and X390).
1. Check fuse F110.
2. Check the power supply cable (connector X110).
3. Replace the printed circuit board.
1. Check the control panel by connecting it to another
unit with another cable.
Replace the control panel if it does not work.
1. Check the wiring of the fan.
2. Check the transformer fuse.
3. Replace the fan.
1. Check the transformer connections.
2. Check connector X130.
C
A
C
OMFORT
IR
URTAIN
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