7.2 Tracing leakage in refrigeration circuit
As there is always refrigerant oil from the compressor mixed in with the
refrigerant, in the case of a leak it will also be possible to identify traces
of oil.
1. Search for leakage near the welding points and at tube connections.
2. Run your fingers over tube connections and check for traces of oil.
3.
For fault-finding purposes, nitrogen can also be used to increase the
pressure in the refrigeration circuit to 7 bar. Higher pressure may
damage the evaporator. It should then be possible to identify any
leak. Further auxiliary materials for identifying leaks are available in
the form of special leak-finding sprays or soap suds.
Spay (or apply soap solution to) the point where the leakage is suspected to allow
any bubbles to be observed.
4.
If the leak is identified at the intake side.
- Replace compressor along with the dryer.→Page 60
Replace the dryer before any repair of the refrigeration circuit.
If the refrigeration circuit leaks on intake side, the compressor needs to
be replaced in addition to the dryer. Compressor oil is irreparably dam-
aged by penetrating air moisture.
Test
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