TROUBLESHOOTING
DEFECT | EFFECT | CAUSE | REMEDY |
GROUP PARTIALLY | Evaporatordose notfrost even | An empty refrigerantsystem | Leakagemust be eliminated by |
OR COMPLETELY | though motoFcompressorruns | indicatesa leakage of R134a This | resolderingthe defectivepoint or |
OUT OF | continually. | lossis generallyto be lookedfor at | substitutingthe damaged |
REFRIGERANT |
| the soldering pointsconnectingthe | evaporator. |
CHARGE |
| various componentsor in an |
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| eventualhole inthe evaporator |
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| made by the user. |
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EXCESSIVELY
FULL
HUMIDITY IN THE SYSTEM
PRESENCE OF AIR IN THE SYSTEM
This defect is indicated by the | If in the refrigerantsystema quantity | The system mustbe emptiedand |
presenced water outside | of R134a is introducedwhich is | subsequentlyrefilled introducingthe |
refrigeratornear the motor caused | greater than that indicated,the | correctquantity of R134a. |
byformationsof ice on the return | excess gas dosenot terminate its |
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tube. | expansionin the evaporatorbut |
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| proceedsinto the return tube. |
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This defect is indicated by the partial | The refrigerantsystemis humid | The system mustbe emptiedand |
frosting of the evaporatorand by | when there is a small percentageof | then refilledafter eliminatingthe |
continual defrostingcycles | water present which, notcompletely | humidity. |
determined by the interruptionof the | retained bythe dehydratorfilter, |
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flow of gas on the evaporator.The | enters into circulationwiththe Freon |
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motorcompressorkeeps running. | and freezes at the capillaryexit in |
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| the evaporator. |
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Poorperformanceof the refrigerant | There is air in a refrigeratingsystem | Groupmust be drained and |
systemwhich is indicated:on the | when duringthe filling phase | subsequentlyrefilled after carefully |
evaporatorwith a slightfrost which | vacuum is not effectedor it is not | creatingvacuum. |
dose not freezeand an excessive | adequatelydone. |
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overheatingof thecondenserand |
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BLOCKED
CAPILLARY
MOTOR- COMPRESSOR
Becauseof thelack of circulation Freonin the system,there is no frosting of the evaporator,while a
slight overheatingof the first spiralof the condenseris noted.
The systemdose notwork andthe "clixson" intervenesinterrupting delivery to the motorraompressor.
Eventualimpuritiescontained in the Freonor in the componentsof the refrigerationsystembefore assembly and not retainedby the filter can obstruct the capillary.
In case of short circuit,the breakdownis dueto the electric
winding: if blocked,thereis a mechanicalfailure in the motor-
compressoE
Torestore the systemit must be emptied,substitutethe capillaryor the evaporatorentirely in case the capillaryis coaxialwith respectto the return tube, then refill it.
The
MOTOR- COMPRESSOR DOSE NOT COMPRESS
Nofrost forms on the evaporator | In this case there is a mechanical | The |
even if the | failure in the diaphramvalveswhich: | replacedand then proceedwith |
apparentlyrunning regulary. | remainingcontinuallyopen, do not | refilling. |
| permitthe pistonto suck and |
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| compressor the which |
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| consequenteIydose not circulatein |
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| the system. |
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NOISY MOTOR- COMPRESSOR
In case of mechanicalfailure in the
The causeof the excessivenoise is normailyto be sought for in a mechanicalbreak down,and only rarely in the unhookingof one of the suspensionsprings.
The