Additional Checks for Troubleshooting
ESIE13-02
Part 4 – Troubleshooting
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6.12
Check No.14 - Check for Excessive Refrigerant Charging
As criteria for judging whether refrigerant is excessively charged or not, refer to the following operating
conditions.
<Diagnosis of excessive refrigerant charging>
In cooling operation
1
Because high pressure rises due to excessive charging, overload control is carried out and
capacity tends to run short.
2
Considering pressure load, compressor discharge pipe temperature is low.
3
Subcooled degree of condensate liquid becomes large. Therefore, temperature of blown air
passing through subcooled part decreases in heating operation.
