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19
TROUBLESHOOTING
POSSIBLE CAUSES SOLUTIONS
UNIT DOES NOT START
• Unit may have become unplugged
• Fuse may have blown
• Circuit breaker may have been tripped
S Unit may be off or in wall thermostat mode.
Check section on dipswitch settings to verify
dipswitches are set properly.
• Unit may be in a protection or diagnostic failure
mode. See sect ion on Intelligent Self ---checking
Control.
• 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).
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.
UNIT NOT COOLING/HEATING ROOM
S Unit air discharge sectio n is blocked
S 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.
S Unit air filters are dirty.
S Room is excessively hot or cold when unit is started.
S Vent door left open
S Unit may be in a protection or diagnostic failure
mode. Check section on Intelligent Self ---checking
Control.
S 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.
S Make sure that curtains, blinds or furniture are not restricting or
blocking unit airflow.
S Resettoalowerorhighertemperaturesetting.
S Remove and clean filters .
S 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.
S Close vent door.
S Check dipswitch 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 diagnostic condition. Check Intelligent Self ---
checking Control sectio n to determine if unit has had a failure.
• Theunitmaybesetfor_C(insteadof_F), see the keypad
configuratio n section
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, condensatio n 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 outdoo r temperature
• Dirty filters
• When outdoor temperature is approximately 55_Forbelow,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.
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