Trouble shooting guide, Possible causes, Unit does not start – Carrier 51QC/QG User Manual
Page 13: Unit not cooling/heating room, Unit making noises, Water dripping outside, Water dripping inside, Ice or frost build-up on coil
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TROUBLE SHOOTING GUIDE
If you have problems with your Carrier unit, check this convenient
trouble-shooting guide before contacting your Carrier service representative.
POSSIBLE CAUSES
SOLUTIONS
#
UNIT DOES NOT START
• Unit may have come unplugged.
• Fuse may have blown.
• Circuit breaker may have been tripped.
• Unit may have been left in AUTO setting.
UNIT NOT COOLING/HEATING
ROOM
• Unit’s air output is blocked.
• Temperature setting not high or low enough.
• Unit’s air filter is dirty.
• Room excessively hot or cold when unit
is started.
• Exhaust or vent left open.
UNIT MAKING NOISES
• Clicking, gurgling and whooshing noises are
normal during operation of unit.
WATER DRIPPING OUTSIDE
• Condensation run-off during very hot and
humid weather is normal.*’'
WATER DRIPPING INSIDE
• Unit not installed level.
ICE OR FROST BUILD-UP ON
COIL
• Low outside temperature.
• Check that unit is securely plugged into wall socket.
• Replace the fuse!
• Reset circuit breaker!
• Switch into MANUAL mode.
• Remove any curtains, blinds or furniture that may be
blocking unit’s output.
• Reset unit to a lower or higher temperature setting.
• Remove and clean unit’s filter.
• Allow sufficient amount of time for unit to heat or cool
room.
• Close exhaust or vent.
' Unit’s filter is dirty.
• Units with heat feature a thermostatically
operated drain valve in the basepan. The
valve automatically opens to drain conden
sate. In the case of unusual water drippage,
check to make sure drain valve is not blocked.
' Unit must be installed level for proper run-off
of condensation. Check that installation is
level and make any necessary adjustments.
• When outdoor temperatures are 55°F or below, frosting
may occur when unit is in cooling mode. Switch unit to
FAN operation until ice or frosting melts.
• Remove and clean filter.
f>f circuit breaker is tripped repeatedly, or fuse is blown more than once, contact a qualified electrician
**
When cabinet casing is installed, using proper installation steps, unit is properly pitched towards the outdoors to allow for condensation
runoff. An optional Accessory External Drain Kit is available to expel unit condensation away from building’s exterior. If unit is installed where
condensate drainage will drip onto pedestrians or neighboring properties, contact an authorized Carrier Dealer, or call 1-800-CARRIER to
order the External Drain Kit.