Friedrich Kuhl+ KEQ08A11A User Manual

46 PB
R-410A SEALED SYSTEM REPAIRS
Restricted Refrigerant System
Troubleshootingarestrictedrefrigerantsystemcanbedifcult.Thefollowingproceduresarethemorecommonproblemsand
solutionstotheseproblems.Therearetwotypesofrefrigerantrestrictions:Partialrestrictionsandcompleterestrictions.
Apartialrestrictionallowssomeoftherefrigeranttocirculatethroughthesystem.
Withacompleterestrictionthereisnocirculationofrefrigerantinthesystem.
Restrictedrefrigerantsystemsdisplaythesamesymptomsasa“low-chargecondition.”
Whentheunitisshutoff,thegaugesmayequalizeveryslowly.
Gaugesconnectedtoacompletelyrestrictedsystemwillruninadeepvacuum.Whentheunitisshutoff,thegaugeswillnot
equalizeatall.
Aquickcheckforeitherconditionbeginsattheevaporator.Withapartialrestriction,theremaybegurglingsoundsatthe
meteringdeviceentrancetotheevaporator.Theevaporatorinapartialrestrictioncouldbepartiallyfrostedorhaveaniceball
closetotheentranceofthemeteringdevice.Frostmaycontinueonthesuctionlinebacktothecompressor.
Oftenapartialrestrictionofanytypecanbefoundbyfeel,asthereisatemperaturedifferencefromonesideoftherestrictionto
theother.
Withacompleterestriction,therewillbenosoundatthemeteringdeviceentrance.Anamperagecheckofthecompressorwith
apartialrestrictionmayshownormalcurrentwhencomparedtotheunitspecication.Withacompleterestrictionthecurrent
drawnmaybeconsiderablylessthannormal,asthecompressorisrunninginadeepvacuum(noload.)Muchoftheareaofthe
condenserwillberelativelycoolsincemostoralloftheliquidrefrigerantwillbestoredthere.
Figure 603 (Restricted System)

Friedrich Kuhl+ KEQ08A11A Specifications

General

Brand	Friedrich
Model	Kuhl+ KEQ08A11A
Category	Air Conditioner
Language	English