York SINGLE PACKAGE HEAT PUMP UNITS User's, Maintenance And Service Information Manual page 4

WATER RUN - OFF
During the heating cycle, you may notice water running
off the outdoor coil. Moisture from the air is condensed
on the outside surface of the coil where it gathers and
runs off. No need for alarm, your unit has not sprung a
leak!
OUTDOOR COIL DEFROSTING
At certain outdoor conditions (low temperature, high
humidity), frost may build up on the coil of the outdoor
unit. In order to maintain heating efficiency, the system
will automatically defrost itself.
Water vapor rising from the outdoor unit is normal and
is an indication of proper operation. The vapor cloud
DUCT SIDE
INDOOR
COIL
FIGURE 1 - FILTER ACCESS
4
will only last for a few minutes. When the defrost cycle
is completed, the system will automatically switch back
to heating. Electric heat is automatically energized to
maintain comfort during defrost.
BEFORE CALLING A SERVICE PERSON
•
•
•
HORIZONTAL
FILTER
VERTICAL
FILTER
Check thermostat setting and insure thermostat is
calling for heat or cooling. Check thermostat for
lint, etc.
Check fuses or circuit breakers
Check filters for excessive dust accumulation
CONTROL BOX SIDE
66492-YUM-B-0106
CONTROL
BOX
INDOOR
COIL
Unitary Products Group