Troubleshooting Guide

notadjusted;however,itisavailablefor
temperaturecontrolling.
7

• SettingParameter:Pressfor6seconds.Start
parametermenuandPA(menupassword)
flashing.Enterthepasswordbypressing or
.Press againtochoosetheparameter.
Pressorthentheparametercanbe
displayedandadjusted.Aftertheadjustment,if
nobuttonhasbeenpressedafter30seconds,
thesystemwillrestorethenewparameterand
gobacktonormaloperations.
• Changingmenupassword(CPA):TheCPAcan
becheckedorchangedonlyafterthecorrect
menupasswordhasbeenentered.Whenit
showsCPA,pressorthenthepresent
passwordisdisplayedandcanbechangedtoa
newpassword.Presstoconfirmthenew
password.(Pleasememorizethenewpassword
oryoucanneveradjustotherparameters.)
• Thefactorydefaultresumption:Press
buttonfor1secondandthenpressbutton
simultaneouslyfor6seconds.Theindicatorwill
flashandthenallparameterswillberestoredto
backtothefactorydefaults.After10seconds,it
willreturntonormaloperation.
Parameterdetails
• Temperaturecontrolling:Afterturningonfor
thedelaytime(e4),thecompressorstarts
operatingwhencold‐roomtemperature(set
temperature+hysteresis),andwilloffwhen
cold‐roomtemperaturesettemperature.To
protectthecompressoritcanbere‐started,
unlessthetimewhenthecompressorstops
everytimeislongerthanthedelaytime(E4).
• Evaporatorfanoperatingfunction:
F5isset“00”,parallelwithcompressor.
F5isset“01”,continuousrunning(exceptdefrost).
• Electricheaterdefrost:evaporatorsensor
temperature<defrostterminationtemperature
(F3),theheat erwillswitchonandthedefrost
willstart.
Afteradefrostinterval,itbeginstheautomatic
defrostfunction.e.g.:Whentheevaporatorsensor
temperature<defrostterminationtemperature
(F3),thedefrostLEDwillturnon,thecompressor
andfanwillstop,andtheheaterwillstart.When
theevaporatorsensortemperaturedefrost
terminationtemperatureordefrostduration(F1)
ends,theheateranddefrostwillstopafterthe
drainingtime(F6).Thecold‐roomtemperature
(settemperature+hysteresis),thecompressorwill
startsandgobacktorefrigerationstatus.
Whenthedefrostintervaltime(f2)isset”00”,the
functionoftheautomaticsdefrostwillbecancelled.
Temperaturedisplayedwhendefrost:IfF4isset
“01”,itdisplaysthetemperaturewhenthedefrost
starts.Afterdefrost,Itwillcontinuetodisplaythis
tempfor20minandthedefrostLEDwillbegin
flashing.Itwillthencomebacktonormal
temperature.
• Controllingtheevaporatorfanafterdefrost:
Controllingbytime:WhenF7isset“00”after
defrost,thecompressorworksforF8andthen
thefanrestarts.Afterdefrostandthefirst
workingmode,thefanwillfollowthemodeof
F5.
Controllingbytemperature:WhenF7isset“01”
afterdefrost,whentheevaporatortemperature
reachesF9,thefanrestarts.Afterdefrostand
thefirstworkingmode,thefanwillfollowthe
modeofF5.
• Sensorfailureworkmode:Ifthecold‐room
sensorisshortcircuitedoroverheated,“HH”
willbedisplayed.Ifthecold‐roomsensorisin
anopencircuitorthetemperatureistoolow
then“LL”isdisplayed.Atthattimethe
compressorwillautomaticallygotoacycleof
45minonand15minoff.Whentheevaporator
sensorfailsorsurpassesthedisplayedrange,
thedefrostterminationwillbejustcontrolled
bythedefrostduration.
