Spheros Aerosphere World Betriebsanleitung Seite 46

Aerosphere World / Midibus
Symptoms
AC does not cool down and Lack of refrigerant
the compressor remains on
Air or other gas in the system
Dirty or defective expansion valve
Dirty evaporator coil
Air filter dirty
It cools down too much and Bad temperature selection
the compressor does not
Temperature sensor badly placed
turn off
High discharge pressure Excess refrigerant in the system
Refrigerant flow obstructed
Condenser motor is stopped
Dirty condenser coil
Low suction pressure Lack of refrigerant
Air return temperature is too low
Dirty or defective expansion valve
Evaporator motor is stopped
Restriction in the system
Contaminated air filter
Dirty evaporator coil
Fig. 10 Failure Diagnosis Table
42
Probable cause
Check for leakage, fill to correct amount
Draw a vacuum (min. 3 hours below 10 mbar) replace filter drier, fill to correct
amount
Clean or 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
Clean or replace the valve
Replace motor
Eliminate
Clean or replace filter
Clean coil
Solution