Spheros CC 145 Betriebsanleitung Seite 25

Symptoms
AC does not cool down and
the compressor remains on
It cools down too much and
the compressor does not
turn off
High discharge pressure
Low suction pressure
Fig. 6 Failure Diagnosis Table
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Probable cause
Lack of refrigerant
Air or other gas in the system
Dirty or defective expansion valve
Dirty evaporator coil
Air filter dirty
Incorrect temperature selection
Temperature sensor badly placed
Excess refrigerant in the system
Refrigerant flow obstructed
Condenser motor is stopped
Dirty condenser coil
Lack of refrigerant
Air return temperature is too low
Dirty or defective expansion valve
Evaporator motor is stopped
Restriction in the system
Loaded air filter
Dirty evaporator coil
manuals search engine
Check for leakage, fill to correct amount
Draw a vacuum (min. 3 hours below 10 mbar) replace filter drier, fill to correct
amount
Replace the valve
Clean the coil
Clean or replace filter
Adjust the temperature on the control panel
Place the sensor appropriately
Drain and capture refrigerant, fill to correct amount
Check for restriction (compressor valve partially closed, expansion valve blocked,
filter drier blocked, etc.)
Refer to symptom "Condenser motor is stopped"
Clean and wash
Check for leakage, fill to correct amount
Place the temperature sensor at the most appropriate position
Replace the valve
Replace motor
Eliminate
Clean or replace filter
Clean coil
CC 145
Solution
23