Refrigerant System - Friedrich racservmn Service Manual

PROBLEM
Compressor will not
turn off and operate on
heating element only
during low outside
ambients.
Low Suction Pressure
Low Load Conditions
Low Air Flow Across
Indoor Coil

Refrigerant System

Restriction
Undercharged
Moisture in System
44
POSSIBLE CAUSE
Outdoor thermostat.
(Applicable models.)
Troubleshooting Chart — Cooling
REFRIGERANT SYSTEM
DIAGNOSIS COOLING
High Suction Pressure
High Load Conditions
High Air Flow Across
Indoor Coil
Reversing Valve not
Fully Seated
Overcharged
Defective Compressor
TO CORRECT
Refer to the heating data on applicable models for
the preselected temperature the compressor shuts
off and the electric element is energized.
Low Head Pressure
Low Load Conditions
Refrigerant System
Restriction
Reversing Valve not
Fully Seated
Undercharged
in System
Defective Compressor
High Head Pressure
High Load Conditions
Low Air Flow Across
Outdoor Coil
Overcharged
Noncondensables (air)