Owner’s Manual -
PTAC/PTHP130-150B/BSC
14
13
TROUBLESHOOTING
POSSIBLE CAUSES
SOLUTIONS
UNIT DOES NOT START
• Unit may be unplugged
• Fuse may have blown
• Circuit breaker may have tripped
• 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
section on diagnostic codes.
• 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).
DISPLAY HAS STRANGE NUMBERS/CHARACTERS ON IT
• The unit may be in a diagnostic condition. Check diagnostic
codes --- checking Control section to determine if unit has had
a failure.
• The unit may be set for °C (instead of °F), see the
SET UP
OPERATION.
UNIT MAKING NOISES
• Clicking, gurgling and whooshing noises are normal during
operation of unit.
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 SET UP
OPERATION 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.
• 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 lime 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
WATER DRIPPING INSIDE
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.
• 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 startup delay of 3 minutes and a
minimum compressor run time of 3 minutes.
• 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 meIts.
• Remove and clean filters.
• Wall sleeve must be installed level for proper drainage of
condensation. Check that installation is level and make any
necessary adjustments.
• If a drain kit has not been installed, condensation run off 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.
