14
TROUBLESHOOTING
SOLUTONS
POSSIBLE CAUSES
UNIT DOES NOT START
Unit may have become unplugged
Fuse may have blown
Circuit breaker may have been tripped
Unit may be off
Unit may be in a protection mode.
Check that plug is plugged securely in wall receptacle.
Note:
Plug has a test/reset button on it. Make sure that the plug
has not tripped.
Replace the fuse. See Note 1.
Reset circuit breaker. See Note 1.
Turn unit on (bottom right button on keypad).
UNIT NOT COOLING/HEATING ROOM
Unit air discharge section is blocked
Temperature setting is not high or low
enough
Note:
Setpoint limits may not allow the
unit to heat or cool the room to the
temperature desired. Check section on
dipswitch settings.
Unit air filters are dirty.
Room is excessively hot or cold when
unit is started.
Vent door left open.
Unit may be in a protection mode.
Compressor is in time delay.
Make sure that curtains, blinds, and furniture are not restricting or
blocking unit airflow.
Reset to a lower or higher temperature setting.
Remove and clean filters.
Allow sufficient time for unit to heat or cool the room.
Start heating or cooling early before outdoor temperature, cooking
heat, or large groups make room uncomfortable.
Close vent door.
Check dip switch and wall thermostat settings for desired comfort.
Wait approximately 3 minutes for compressor to start.
DISPLAY HAS STRANGE NUMBERS/
CHARACTERS ON IT
The unit may be in a protection mode.
O
O
The unit may be set for C (instead of F).
UNIT MAKING NOISES
Clicking, gurgling, and whooshing noises are normal during
operation of unit.
WATER DRIPPING OUTSIDE
If a drain kit has not been installed, condensation runoff during very
hot and humid weather is normal. See Note 2. If a drain kit has been
installed and is connected to a drain system, check gaskets and
fittings around drain for leaks and plugs.
WATER DRIPPING INSIDE
Wall sleeve is not installed level
Wall sleeve must be installed level for proper drainage of
condensation. Check that installation is level and make any
necessary adjustments.
ICE OR FROST FORMS ON INDOOR
COIL
Low outdoor temperature
Dirty filters
When outdoor temperature is approximately 55°F or below, frost
may form on the indoor coil when unit is in Cooling mode. Switch
unit to FAN operation until ice or frost melts.
Remove and clean filters.
COMPRESSOR PROTECTION
Power may have cycled, so compressor
is in a restart protection.
Random Compressor restart-
Whenever the unit is plugged in, or
power has been restarted, a random compressor restart will occur.
After a power outage, the compressor will restart after approximately
3 minutes.
Compressor Protection-
To prevent short cycling of the compressor,
there is a random startup delay of 3 minutes and a minimum
compressor run time of 3 minutes.
NOTES:
1.If circuit breaker is tripped or fuse is blown more than once, contact a qualified electrician.
2.If unit is installed where condensation drainage could drip in an undesirable location, an accessory drain kit
should be installed and connected to drain system.
ELECTRIC HEATING FAILURE
Clean the evaporator once every three months by professional
people.
