Nirvana B50 - Troubleshooting Guide

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12.0 TROUBLESHOOTINGGUIDE
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MAINTENANCE&TROUBLESHOOTINGCODE
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
PROBLEM CAUSE WHATTODO
Digitalcontroldisplays
CODE:FLO
 Thewaterflowinsidetheheatpumpis
insufficient
 Thereisnowatercirculationinsidethe
heatpump
 Theflowswitchisdefective
 Checkthatthecirculatingpumpisworking;
 Checkthatthebypassvalvesareproperly
positioned;
 Checktheskimmer(noblockage);
 Checkthewaterpressuregaugeoftheheat
pump,itshouldreadbetween10and15
psi.
Digitalcontroldisplays
CODE:FL3
 Theheatpumpflowswitchhascutoff
three(3)timesinthesamehourforone
ofthereasonsabove

 Theheatpumpwillnotre‐startafteroneof
theprotectiondevicesshutsitdownfor
thethirdtimeinthesamehour;
 Closethecircuitbreakertoresettheheat
pump.
Digitalcontroldisplays
CODEFS
 Theheatpumpisinde‐icingmode  Waituntiltheendofthede‐icingcycle.The
heatpumpwillrestartautomatically
Digitalcontroldisplays
CODE:LP
 Ventilationontheevaporatoris
insufficient.
 Thefandoesnotwork
 Freonleak
 Theoutsidetemperatureisverylow
 Checkthattheevaporatorisnotblockedby
pollen,grass,leaves;seetheuser’smanual
forsafetyandmaintenancetips
 Besurethereisenoughfreespacearound
theheatpump(seetheInstallationGuide)
 CheckthatthefanispoweredON
Digitalcontroldisplays
CODE:LP3
 Theheatpumplowpressureswitchhas
cutoffthree(3)timesinthesamehour
foroneofthereasonsabove
 Theheatpumpwillnotre‐startafteroneof
theprotectiondevicesshutsitdownfor
thethirdtimeinthesamehour
 Closethecircuitbreakertoresettheheat
pump
Digitalcontroldisplays
CODE:HP
 Thewaterflowinsidetheheatpumpis
insufficient
 Thebypassvalveisinthewrongposition
 Thewaterexitisblocked.
 Thereisablockageintherefrigeration
circuit(pipingblocked)
 Checkwhetherthereisadequatewater
circulationinside
 Checkthatthebypassvalvesareproperly
positioned
 Checkwhetheranythingisblockingthe
waterhose
Digitalcontroldisplays
CODE:HP3
 Theheatpumphighpressureswitchhas
cutoffthree(3)timesinthesamehour
foroneofthereasonsabove
 Theheatpumpwillnotre‐startafteroneof
theprotectiondevicesshutsitdownfor
thethirdtimeinthesamehour
 Closethecircuitbreakertoresettheheat
pump
Digitalcontroldisplays
CODESPI
 Thedigitalcontrolisdefective  Closethebreakerswitchandre‐openit.If
theproblemisnotresolved,thedigital
controlwillhavetobechanged.Inthis
case,callyourdealer