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Basic Troubleshooting
SYMPTOM
POSSIBLE CAUSES
Unit Does Not
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Start
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Unit Not Cooling/
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Heating Room
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Display Has
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Strange
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Numbers/
Characters On It
Unit Making
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Noises
Water Dripping
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Outside
Water Dripping
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Inside
Ice Or Frost
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Forms On Indoor
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Coil
COMPRESSOR
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PROTECTION
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
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TROUBLESHOOTING
Unit may have become unplugged.
Fuse may have blown.
Circuit breaker may have been tripped.
Unit may be off or in wall thermostat mode.
Check section on dip switch settings to verify dip
switches are set properly.
Unit may be in a protection or diagnostic failure
mode. See section on Intelligent Self- checking
Control.
Unit air discharge section is blocked
Temperature setting is not high or low enough Note:
Set-point limits may not allow the unit to heat or cool
the room to the temperature desired.
Check section on dip switch 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.
The unit may be in a diagnostic condition.
The unit may be set for C (instead of F).
Clicking, gurgling and whooshing noises are normal
during operation of unit.
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 is not installed level
Low outdoor temperature
Dirty filters
Power may have cycled, so compressor is in a
restart protection.
SOLUTIONS
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Check that plug is plugged securely in wall receptacle.
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Note : Plug has a test/reset button on it. Make sure that
the plug has not tripped.
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Replace the fuse. See Note 1.
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Reset circuit breaker. See Note 1.
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Turn unit on (bottom right button on keypad).
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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.
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Make sure that curtains, blinds or furniture are not
restricting or blocking unit airflow.
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Reset to a lower or higher temperature setting.
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Remove and clean filters.
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Allow sufficient amount of time for unit to heat or cool the
room.
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Start heating or cooling early before outdoor temperature,
cooking, heat or gatherings of people make room
uncomfortable.
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Close vent door.
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Check dip switch settings for desired comfort.
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Wait approximately 3 minutes for compressor to start
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Check Intelligent Self - checking Control section to
determine if unit has had a failure.
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See the keypad configuration section.
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Wall sleeve must be installed level for proper drainage of
condensation. Check that installation is level and make any
necessary adjustments.
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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.
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Remove and clean filters.
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Random Compress or 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.
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Compress or 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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