Carrier KC_ Series - Troubleshooting Common Issues; Common Problems and Solutions

KC_
SERIES
14
TROUBLESHOOTING
NOTE: If circuit breaker is tripped repeatedly or fuse is blown more than once, contact a qualified electrician.
See Fig. 28 for wiring diagram.
PROBLEM CAUSE SOLUTION
UNIT DOES NOT START Unit may have become unplugged. Check that unit is securely plugged into the wall
socket.
Fuse may have blown. Replace fuse. See Note.
Circuit breaker may have tripped. Reset circuit breaker. See Note.
Unit mode may be set to OFF. Check to make sure Cooling mode is selected.
UNIT NOT PROVIDING ENOUGH
COOLING
Unit airflow is blocked. Remove any curtains, blinds, or furniture that may be
blocking indoor airflow. Check outdoor airflow and
remove any blockage to outdoor airflow.
Thermostat temperature setting is too high. Reset thermostat to a lower (cooler) temperature.
Unit air filter is dirty. Remove and clean air filter.
Room was excessively hot when cooling oper-
ation started.
Allow sufficient time for unit to cool room.
Compressor Overload tripped. Let fan run for approximately 10 minutes to reset
compressor overload and restart compressor.
UNIT MAKING NOISES Normal operation. Low clicking, bubbling, or whooshing noises are nor-
mal during operation of the unit.
Loose parts. Tighten loose parts.
Inadequate support. Provide additional support to unit.
UNIT ODORS Formation of mold, mildew, or algae on wet
surfaces.
Remove drain plug and drain condensate from unit.
Clean base pan.
WATER DRIPPING OUTSIDE Normal operation. Condensation runoff during hot and humid weather
is normal. A field-supplied drain hose can be
installed if required.
WATER DRIPPING INSIDE Unit is not installed at proper angle. Unit must be tilted slightly outside for proper runoff of
condensation. Check that installation is correct and
make necessary adjustments.
ICE OR FROST BUILD-UP ON COIL Unit air filter is dirty. Remove and clean air filter.
Low outside temperature. When outdoor air is approximately 65 F (18 C) or
below, frost may form when unit is in Cooling mode.
Switch unit to Fan Only mode until ice or frost melts.