TROUBLESHOOTING
POSSIBLE CAUSES
UNIT DOES NOT START
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Unit may have become unplugged
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Fuse may have blown
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Circuit breaker may have been tripped
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Unit may be off or in wall thermostat mode.
C h e c k s e c t i o n o n d i p s w i t c h s e t t i n g s t o v e r i f y
dipswitches are set properly.
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Unit may be in a protection or diagnostic failure
mode. See section on
diagnostic
codes.
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DISPLAY HAS STRANGE NUMBERS/CHARACTERS
ON IT
UNIT MAKING NOISES
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 or diagnostic failure mode.
Check section on Intelligent Self --- checking Control.
Compressor is in time delay. There is a protective time
delay (approx . 3 minutes) on starting the compressor
after a power outage(or restarting after it has been
turned off ), to prevent tripping of the compressor
overload.
WATER
DRIPPING
OUTSIDE
WATER DRIPPING INSIDE
Wall sleeve is not installed level
ICE OR FROST FORMS ON INDOOR COIL
Low outdoor temperature
Dirty filters
COMPRESSOR PROTECTION
Power may have cycled, so compressor is in a restart
protection.
SOLUTIONS
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.
Reset circuit breaker.
Turn unit on (bottom right button on keypad).
Note
: If the unit turns on, the LED will be green. If the unit is
off
,
the LED will be red. If there is no LED on, there is a
problem with power or damage to the control.
The unit may be in a diagnostic condition. Check
--- checking Control section to determine
if unit has had a failure.
The unit may be set for ° C (instead of ° F), see the keypad
configuration section
Clicking, gurgling and whooshing noises are normal during
operation of unit.
Make sure that curtains,
blinds or furniture are not restricting or
blocking unit airflow.
Reset to a lower or higher temperature setting.
Remove and clean filters.
Allow sufficient amount of time for unit to heat or cool the room.
Start heating or cooling early before outdoor temperature, cooking
heat or gatherings of people make room uncomfortable.
Close vent door.
Check dipswitch settings for desired comfort.
Wait approximately 3 minutes for compressor to start
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.
Wall sleeve must be installed level for proper drainage of
condensation. Check that installation is level and make any
necessary adjustments.
When outdoor temperature is approximately 55°F
(12.8°C) 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.
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
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diagnostic
codes
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-
13
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