Page 2021 - Foton Workshop Manual - Tunland (AT)

HEATER AND AIR CONDITIONING - REFRIGERANT 61-25

61

Symptom Possible Cause Diagnostics Action
Steam in the cooling • Fluid reservior is
system is condensed • Replace the
overly saturated.
During operation, the in the expansion condenser.
• Steam is
pressure at the low valve hole and the • Discharge the
condensed in the
end is sometimes return pipe stops steam inside the
expansion valve
vacuum, and is working from time to hole and blocks the return pipe.
normal in other times time. When it is • Add some
flow of the
melted, it returns to refrigerant.
refrigerant.
normal.

• Insufficient cooling (condition: ineffective cooling system)

Symptom Possible Cause Diagnostics Action

Vaccum at the low • System leakage - System leakage - • Check the
end and low pressure check connector
insufficient expansion valve.
at the high end. Frost and exposed parts.
or dew on the pipes • The flow of the refrigerant, unable to • Blow off the dirt
before and after the refrigerant is circulate. inside the

Page 2021