Part Number STH034 3/12 127
ANALYZING SUCTION PRESSURE OR
TEMPERATURE
NOTE: Analyze discharge pressure/temperature
before analyzing suction pressure/temperature.
High or low discharge pressure/temperature may be
causing high or low suction pressure/temperature.
Suction Pressure High Checklist
Problem Cause
Improper
installation
Refer to Installation procedures.
Discharge
pressure
Discharge pressure/temperature is too high
and is affecting suction pressure/
temperature.
Refer to “Discharge Pressure/temperature
High Checklist.”
Improper
refrigerant
charge
Overcharged
Wrong type of refrigerant
Non condensable in system
Other
Non-OEM components in system
TXV flooding (check bulb mounting and
insulation).
Defective compressor
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