Page 1123 - Workshop Manual - Aumark (BJ1051)

51-31
Heater and AC-Refrigerant oil

z There is vapor inside of the system

Condition: not refrigerated
continuously

Phenomenon Possible reasons Diagnosis Measures
The pressure of low Vapor inside of Liquid reservoir is 1. Replace condenser.
pressure side is vacuum refrigeration system is supersaturated. 2. Exhaust the vapor
sometimes and sometimes frozen in the hole of Vapor is frozen in the hole inside of circuit by
it is normal during running. expansion valve causing of expansion valve, so the compressed air.
the return circuit stops refrigeration is blocked. 3. Supplement some
working temporarily. It refrigerant.
resumes working when the
ice is melt.
z Refrigeration insufficiency

Condition: effect of
refrigeration system is
insufficient

51

Phenomenon Possible reasons Diagnosis Measures
The pressures of low There is leak inside of Refrigerant is not enough. 1. Check the leak
pressure side and high refrigeration system. position and repair it
pressure side are low. as necessary
It is expressed as 2. Supplement some
refrigeration insufficient. refrigerant
3. When connect
compressortable,
Evacuate it into
vacuum afteroverhaul
if the pressure value
displayed reaches to 0.

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