Refrigerant Overcharge
Loose TXV bulb
Refrigerant Undercharge
High Evaporator Airflow
Restriction (Liquid Drier)
400/500 series refrigerant vapour charged
Low Evaporator Airflow
Cross oil contamination
Fouled or dirty condenser
Non-condensables
Tight compressor (drag/seizing)
R-12 system with 10% R-134A mixed in
Inefficient compressor
Large leak 400/500 series refrigerant
TXV bulb charge lost
Low condensing ambient
Electrical phase imbalance (3 phase)
HIGHER THAN NORMAL

HEAD
PRESSURE


DISCHARGE
TEMPERATURE


SUCTION
PRESSURE

LOWER THAN NORMAL
HIGHER THAN NORMAL

SUPERHEAT
(TXV)


SUBCOOLING
(CONDENSER)


AMPERAGE
(CONDENSER)

LOWER THAN NORMAL

     

Input Access Code