Maintenance - Carrier FDT21 Operation & Installation Manual

MAINTENANCE

. 3 1
CLEANING THE INTERNAL AIR FILTERS
Before inspection and maintenance of the unit, always set the main power switch to "OFF" to cut off power supply.
Remove the air filter; clean it with a vacuum cleaner or
if it is very dirty, wash it with soap water then wipe
off until it is completely dry before reinstallation.
*To remove the air filter, consult an installer.
SUGGESTION :
If the air filter is dirty, it will cause the reduction
of airflow, The unit is overloaded and
consumes 6% more of electricity. So regular
cleaning is neccessary.
3.2
AT THE START OF THE SEASON
Check that nothing blocks the air inlet and outlet
of indoor and outdoor units.
Running the unit without an air filter can cause
malfunctions due to dirt or dust. Always install
an air filter at all times.
Check that the drainage hose is not
obstructed or clogged.
3.3
DURING THE OFF SEASON
Cut off the power supply main switch.
if not using for heating.
Clean the air filter and other parts.
Leave the circulation fan running for 2-3 hours
to dry out the inside of the unit.
9
OPERATION INSTRUCTIONS