Page 1307 - Foton Workshop Manual - Aumark (BJ1099)

HEATING AND AIR CONDITIONING - REFRIGERANT 41-27

Symptom Possible Cause Diagnostics Action

•Check the expansion
valve.

•System leakage - check •Blow off the dirt inside
Vaccum at the low end connector and exposed the expansion valve
and low pressure at the parts. with compressed air.
high end. Frost or dew •The flow of the refrigerant System leakage - •Replace the condenser.
on the pipes before and is blocked by steam or insufficient refrigerant, • Vacuum the system
and Add some
after the dirt. unable to circulate. refrigerant.
condensing/drying can •The flow of the refrigerant • If any leakage in the
or expansion valve. is intervened by leakage expansion valve,
in the expansion valve.
replace it.
• Check for leaking
points.

• Unsmooth circulation of refrigerant (condition: ineffective cooling system)

41

Symptom Possible Cause Diagnostics Action

Low pressure at both Refrigerant blocked by •Replaced the damaged
high and low ends. Frost dirt System blocked parts
on the condenser pipe. •Replace the condenser

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