Friedrich KCS08A10A Service Manual page 52

LOW SUCTION PRESSURE
Low Load Condi�ons
Low Air Flow Across
Indoor Coil
Refrigerant System
Restriction
Undercharged
Moisture in System
52
TROUBLESHOOTING
AIR CONDITIONERS: TROUBLE SHOOTING TIPS
REFRIGERANT SYSTEM DIAGNOSIS – COOLING CYCLE
HIGH SUCTION PRESSURE
High Load Conditions
High Air Flow Across
Indoor Coil
Reversing Valve not
Fully Seated
Overcharged
Defective Compressor
Figure 719 (Trouble Shooting Tips)
LOW HEAD PRESSURE
Low Load Condi�ons
Refrigerant System
Restriction
Reversing Valve not
Fully Seated
Undercharged System
Defective Compressor
HIGH HEAD PRESSURE
High Load Conditions
Low Airflow Across
Outdoor Coil
Overcharged
Noncondensables (air)
in System