Page 1126 - Workshop Manual - Aumark (BJ1051)

51-34
Heater and AC-Refrigerant oil

z Malfunction of expansion valve

Condition: effect of
refrigeration is
insufficient

Phenomenon Possible reasons Diagnosis Measures
The pressures of low There is problem on There is excessive Check and replace
pressure side and high expansion valve. refrigerant in low pressure expansion valve.
pressure side are high. pipe.
There is frost or large The opening of expansion
quantity of dew on the valve is too big.
pipeline of low pressure
side.
z Malfunction of compressor

Condition: it is
not refrigerated

51

Phenomenon Possible reasons Diagnosis Measures
The pressures of low Inside of compressor is Malfunction of compressor. Repair or replace the
pressure side is too high leaking. It is leaking on the position compressor
The pressure of high of damaged valve or
pressure side is too low. moving part.

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