14
UNT-SVU001-EN
Troubleshooting
Before calling for service,
please check the following.
The air conditioner does not
operate at all:
- Check if the control ON/OFF
switch is “OFF”. Turn the switch to
ON.
- Check whether the fuse has been
blown or circuit breaker thrown.
Set the ON/OFF Control Switch to
OFF, and turn on the circuit breaker
or replace to a new fuse.
- Check whether the power supply
is interrupted. Wait until the power
is resupplied and then operate the
air conditioner.
Cooling is insufficient:
- Check whether the air filter is
clogged. Clean it.
- Check whether the thermostat
setting is too high. Set the
thermostat to lower temperature.
- Check whether windows or doors
are opened. If opened, close them.
- Check whether there are sources
of heat in the room, cooling is less
effective.
- Check whether the return air grille
or the supply air grille on the
indoor unit and outdoor unit
are blocked. If they are blocked,
remove obstacles to permit air
passage properly.
- Check whether the fan speed is set
at low. Set the fan switch from
“LOW” to “MED” or “HIGH”
Heating is insufficient:
- Check to see if the air filters are
clogged with dust or debris. Clean
the air filters.
- Check to see if the thermostat
setting is too low. Set the
thermostat a higher temperature.
- Check to see if windows or doors
are open. If they are open, close.
- Check to see if the return air grille
or the supply air grille on the
indoor unit are blocked. If they are
blocked, remove obstacles to
permit air passage properly.
- Check to see if the fan speed is set
at low setting. Set the fan switch
from “LOW” to “MED” or “HIGH”
AW 02092023TRA
29/10/02, 2:51 PM
14
Black
