16
O W N E R ’ S M A N U A L
PROBLEM
POSSIBLE CAUSE
SOLUTION
High suction pressure
High air flow.
Incorrect duct work causes
stratification of air on inlet.
Return air temperature too
Lower temperature in room.
high.
Defective compressor.
Replace compressor.
Low suction pressure
Refrigerant charge low.
Adjust refrigerant.
(See charging procedure)
Low air flow.
Adjust blower speed. Check.
blower, motor and pulley.
Return air temperature too
Raise return air temperature.
low.
Dirty filters.
Replace filters.
High humidity in space
Incorrect duct work.
Check duct work design.
(See manual)
Low air flow.
Adjust blower. Check blower,
motor and pulley.
Dirty filters.
Replace filters.
Outdoor condenser not.
Clean outdoor coil and check.
operating properly.
blower, motor and belt.
Refrigerant system
Check pressures. Adjust per
overcharge.
manual.
Unit too small or not enough
Refer to guide lines regarding
capacity to handle humidity
sizing dehumidifiers for load
and problem.
and applications.
SERVICE DIAGNOSIS
continued
(The following is a guide intended for use by qualified
service personnel only. CAUTION High Voltage and
refrigerant under high pressure present.)
