Page 1125 - Workshop Manual - Aumark (BJ1051)

51-33
Heater and AC-Refrigerant oil

z Refrigerant is excessive or the heat elimination of
condenser is bad

Condition: effect of
refrigeration is
insufficient

Phenomenon Possible reasons Diagnosis Measures
The pressures of low Excessive refrigerant Refrigerant is excessive. 1. Clean the condenser
pressure side and high causes insufficient Condenser is dirty. 2. Check the fan of
pressure side are high. refrigeration. Fan of condenser is broken. condenser.
Heat elimination of 3. Check the quantity of
condenser is bad refrigerant and fill
some refrigerant if
condenser and fan
work properly.
z There is air inside of refrigeration system

Condition:
refrigeration system
does not work
Note: the readings displayed
on the meters are when 51
refrigeration system is started
and the refrigerant is replaced
but it is not in vacuum

Phenomenon Possible reasons Diagnosis Measures
The pressures of low There is air inside of There is air inside of 1. Check if the refrigeration
pressure side and high refrigeration system. refrigeration system. oil is dirty or insufficient.
pressure side are high. Degree of vacuum is not 2. Make it vacuum and
Low pressure pipe is too enough. refill the refrigerant.
hot.

Page 1125