Troubleshooting - Carrier 73KCA051D Owner's Manual

PROBLEM
UNIT DOES NOT START
UNIT NOT PROVIDING ENOUGH
COOLING
UNIT MAKING NOISES
UNIT ODORS
WATER DRIPPING OUTSIDE
WATER DRIPPING INSIDE
ICE OR FROST BUILD-UP ON COIL
NOTE: If circuit breaker is tripped repeatedly, or fuse is blown more than once, contact a qualified electrician.
Wiring schematics are shown in Fig. 12 and 13.

TROUBLESHOOTING

CAUSE
Unit may have become unplugged.
Fuse may have blown.
Circuit breaker may have tripped.
Unit mode may be set to OFF.
Unit airflow is blocked.
Thermostat temperature setting is too high.
Unit air filter is dirty.
Room was excessively hot when cooling oper-
ation started.
Compressor Overload tripped.
Normal operation.
Loose parts.
Inadequate support.
Formation of mold, mildew, or algae on wet
surfaces.
Normal operation.
Unit is not installed at proper angle.
Unit air filter is dirty.
Low outside temperature.
9
SOLUTION
Check that unit is securely plugged into the wall
socket.
Replace fuse. See Note.
Reset circuit breaker. See Note.
Check to make sure Cooling mode is selected.
Remove any curtains, blinds, or furniture that may be
blocking indoor airflow. Check outdoor airflow and
remove any blockage to outdoor airflow.
Reset thermostat to a lower (cooler) temperature.
Remove and clean air filter.
Allow sufficient time for unit to cool room.
Let fan run for approximately 10 minutes to reset
compressor overload and restart compressor.
Low clicking, bubbling, or whooshing noises are nor-
mal during operation of the unit.
Tighten loose parts.
Provide additional support to unit.
Run in Fan Only mode to remove condensate from
unit. Clean base pan.
Condensation runoff during hot and humid weather
is normal.
Unit must be tilted slightly outside for proper runoff of
condensation. Check that installation is correct and
make necessary adjustments.
Remove and clean air filter.
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.