Troubleshooting - Carrier 73ACA051T Owner's Manual

PROBLEM
UNIT WILL NOT OPERATE
UNIT NOT PROVIDING COOLING
UNIT MAKING NOISES
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.

TROUBLESHOOTING

CAUSE
Unit may have become unplugged.
Fuse may have blown.
Circuit breaker may have tripped.
Unit mode may be set to OFF.
Thermostat was moved lower then quickly back
to a higher number.
Unit was turned off and then back on too
quickly.
Thermostat not set low enough to bring on
cooling.
Unit airflow is blocked.
Thermostat temperature setting is too warm.
Unit air filter is dirty.
Room was excessively hot when cooling oper-
ation started.
Cooling selector set to LO or MED.
Room temperature below 60 F (16 C)
Temperature sensor tube touching coil, caus-
ing low temperature reading.
Normal operation.
Window vibration.
Normal operation.
Unit is not installed correctly.
Unit air filter is dirty.
Low outside temperature.
7
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.
Wait approximately 3 minutes for unit to reset.
Turn unit off and then wait approximately 3 minutes.
Turn unit back on.
Adjust thermostat to a lower temperature.
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 cooler temperature.
Remove and clean air filter.
Allow sufficient time for unit to cool room.
Set Cooling operation to HI setting.
Cooling will not occur if the room temperature is
below 60 F (16 C).
Straighten tube so it is not touching the coil.
Low clicking, bubbling, or whooshing noises are nor-
mal during operation of the unit.
Unit improperly installed in window. Refer to installa-
tion instructions for proper installation.
Condensation runoff during hot and humid weather
is normal.
Unit must be installed tilted backfor proper runoff of
condensation. Check that installation is correct and
make necessary adjustments.
Remove and clean air filter.
When outdoor air is approximately 60 F (16 C) or
below, frost may form when unit is in Cooling mode.
Switch unit to Fan Only mode until ice or frost melts.