8 Troubleshooting
User reference guide
7
FDXM25~60F3V1B(9)
Split system air conditioners
4P543324-1 – 2018.07
rear suction
bottom suction
2
1
2
1
2
Clean the air filter
. Use a vacuum cleaner or wash with water.
If the air filter is very dirty, use a soft brush and neutral
detergent.
3
Dry the air filter in the shadow.
4
Reattach the air filter.
Hook the filter behind the flap and
attach the filter to the main unit while pushing down on the
hooks.
rear suction
bottom suction
2
1
2
1
5
Turn ON the power.
6
Press the
FILTER SIGN RESET
button.
Result:
The
TIME TO CLEAN AIR FILTER
notification disappears
from the user interface.
7.4
Maintenance before a long stop
period
E.g., at the end of the season.
▪ Let the indoor units run in fan only operation for about half a day in
order to dry the interior of the units.
▪ Turn off the power. The user interface display disappears. When
the main power is turned on, the air conditioner will use some
power, even if it is not operating.
▪ Clean air filters and casings of indoor units. Contact your installer
or maintenance person to clean air filters and casings of the
indoor unit. Maintenance tips and procedures for cleaning are
provided in the installation/operation manuals of dedicated indoor
units. Make sure to install cleaned air filters back in the same
position.
▪ Remove the batteries from the user interface.
7.5
Maintenance after a long stop
period
E.g., at the beginning of the season.
▪ Check and remove everything that might be blocking inlet and
outlet vents of indoor units and outdoor units.
▪ Check if the earth is connected properly.
▪ Check if there is somewhere a broken wire. Contact your dealer in
case of problems.
▪ Clean air filters and casings of indoor units. Contact your installer
or maintenance person to clean air filters and casings of the
indoor unit. Maintenance tips and procedures for cleaning are
provided in the installation/operation manuals of dedicated indoor
units. Make sure to install cleaned air filters back in the same
position.
▪ Turn on the power at least 6 hours before operating the unit in
order to ensure smoother operation. As soon as the power is
turned on, the user interface display appears.
8
Troubleshooting
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
WARNING
Stop operation and shut off the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electric shock or fire. Contact your dealer.
The system MUST be repaired by a qualified service person.
If the system does NOT properly operate except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system according to the following
procedures.
Malfunction
Measure
If the system does not
operate at all.
▪ Check if there is no power failure. Wait
until power is restored. If power failure
occurs during operation, the system
automatically restarts immediately after
power is restored.
▪ Check if no fuse has blown or breaker is
activated. Change the fuse or reset the
breaker if necessary.
▪ Are batteries set in the remote controller?
▪ Is the timer setting correct?
