Conair MPW User's Guide download pdf (Page 43)

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RefrigerationDiagnosticScreen

Onthisscreen,theusercanseeinformationthatwillhelpidentifyandtroubleshoot

refrigerationsystemissues.

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1. Goto ActiveAlarmsScreen/AlarmHistoryscreen:

a. Thiswillappearblankifnoalarmsorwarningsareactive.Thisboxwillbe

flashingifawarningoralarmisactive.

b. PressthisbuttontobetakentotheActiveAlarmsScreen/AlarmHistory.

2. Hot GasBypassOutputPercentage

a. ThisisthecontrolsignalbeingsenttotheHotGasBypassValve.Percentage

correspondstopercentopen.Thereissomelaginvalveresponse,soitwillnot

correspondtotheexactvalvelocationatalltimes.

b. ThisisaheatingfunctionanditwillopentopreventtheSupplyTemperature

fromdroppingbelowtheSetpoint.

c. Itisnormalforthevalvetobeopenatsomepercentageatalmostalltimes.This

chillerisdesignedwithexcesscoolingcapacity,andthisvalvebalancesthat

excesscapacity.

d. AhissingnoiseemittedfromtheHotGasBypassValveistypicalwhenthevalve

isopen.

e. IftheSupplyWaterisconstantlyafewdegreesundersetpoint,theprocessison,

andtheHGBP

%ishigh,theremaybeanelectricalormechanicalproblemwith

theHotGasBypassValve.Onemaynoticealackofahissingsoundinthiscase.

3. Goto MainScreen:Pressingthisbut tonwilltakeyoubacktotheMainScreen.

4. Goto CompressorSetupscreen:Youwillbepromptedforapasswordtoaccessthis

screen.Thecompressorstagingparametersandallotherpasswordprotected

parameterssuchastemperaturealarmsetpointsandtemperaturecontroltuningcanbe

changedfromthisscreen.(ThePasswordis“000”.)

5. Goto ProcessDiagnosticScreen:Changetoscreenthatdisplaysdiagnosticinformation

fortheProcess.

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Conair MPW User's Guide Page 43