MicroLinks Tech H-CAM Instrukcje Operacyjne Pobierz pdf (Strona 146)

TM 11574A-OI

3-52

f. System noises.

Step Probable Cause Remedy

1 Piping vibration. Support piping as required, check for

plugged liquid line strainer.

If fault is not corrected proceed to step 2.

2 Expansion valve hissing. Add refrigerant, check for plugged liquid line

strainer.

If fault is not corrected proceed to step 3.

3 Compressor noisy. Check valve plates for valve noise, replace

compressor (worn bearings), check for

loose compressor hold down bolts.

If fault is not corrected proceed to step 4.

4 Insufficient compressor oil. Add oil.

g. Compressor loses oil.

Step Probable Cause Remedy

1 Leak in system. Repair leaks.

If fault is not corrected proceed to step 2.

2 Plugged or stuck compressor oil return check

valve.

Repair or replace.

If fault is not corrected proceed to step 3.

3 Oil trapping in line. Check piping for oil traps.

h. Frosted suction line.

Step Probable Cause Remedy

1 Expansion valve admitting excess refrigerant. Adjust expansion valve.

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MicroLinks Tech H-CAM Instrukcje Operacyjne Strona 146