Page 1517 - Foton Workshop Manual - Auman EST-M

Electrical system – electrical components EL - 93

IN
Phenomenon Possible reason Diagnosis Measure
Both low pressure side and high ● Replace the damaged
Refrigerant is blocked by DI
pressure side are at low pressures. The system is blocked. part
dirt
Frost formed on condenser tubes ● Replace the condenser
EG
● The refrigerant cannot be cycled (condition: refrigeration system works intermittly)

TR

AX

FR

ST

BR

BW
Phenomenon Possible reason Diagnosis Measure

● Check the expansion valve
Vacuum is present at the low
● Remove the dirt from inside the EL
pressure side. The pressure of ● The refrigerant flow is
expansion valve by using
high pressure side is extremely hindered by moisture or
compressed air
low. Frost or condensate is dirt trapped in the system. The refrigerant can
● Replace the condenser
formed on upstream and ● The refrigerant flow is not be cycled.
● Vacuum the system and add
downstream tubings of the hindered by the leakage at
proper amount of refrigerant
condensing/drying drum or the the expansion valve
● Replace the expansion valve if it
expansion valve
leaks
● Too much refrigerant or bad heat transfer of the condenser (condition: inefficient refrigeration)

EL-093