Service manual

11
Service Information
Keypad Options
WARNING
Electrocution can cause death or serious
injury. Burns from hot or cold surfaces can
cause serious injuty. Take precautions when
servicing this unit.
 • Disconnectthepowersource.
 • Donotstandinstandingwaterwhen
workingaroundelectricalappliances.
 • Makesurethesurfacesyoutoucharenot
hotorcold.
 • Donottouchabarecircuitboardunless
youarewearingananti-staticwriststrap
thatisgroundedtoanelectricalgroundor
groundedwaterpipe.
 • Handlecircuitboardscarefullyandavoid
touchingcomponents.
When touching key combinations in which
you hold one key and press another key three
times, it is important to carefullt follow this
procedure:
1. Holdthedesiredkeyensuringthelightabove
thekeyislit.
2. Presstheotherkeythreetimes,ensuringit
lightsupeachtime.
3. Releasetheheldkeyonlyafterreleasingthe
pressedkeyforthethirdtime.
Except as noted, these functions are available
on all models.
ON/OFF
TheON/OFFmodeallowstheunittobeturned
onandoffviathekeypad.Todothis,holdthekey
forapproximately10secondsuntilthe“F”begins
toash.Releasethekeyandtheunitwillswitch
modes.
Thismodedoesnotdisconnectpowerfromthe
circuitboardsiitisstill“LIVE”.
Viewing Actual Temperature
Inviewingtemperatureinthesemodesanyoffsets
aretakenintoaccount.Thismeansthatifyou
placeathermistorinaknowntemperature,ice
waterforexample,itmaynotread32°Fthatyou
wouldassume.Ifthecontroloffsetwaspresetat
-3°Fwhileyouplacedthethermistorinanice
bath,theactualthermistorreadingwhebviewing
actualtemperaturewouldread35°F.Intheunitthis
wouldcausethecabinettopushitself3°cooler.to
virepurethermistorreadingsyoumustgointothe
ServiceMenuandchoosethecorrectoption.
Toviewthethermistortemperature,holdthe
WARMERkeyforapproximatelyvesecondsuntil
the“F”ashes.Releaseandthedisplaywillshow
thecorrectedrefrigeratortemperature.ForWine
Coolermodels,thedisplaywillcyclethroughall
threezones.Thesetemperaturesareapproximate
andcalibratedforacabinetinnormalambient
temperatureswithsomeproductload.Checkinga
completelyunloadedcabinetmayresultinother
temperatures.
Changing from Fahrenheit to Celsius
Tochangethedisplayedtemperaturefrom°Fto
°C,holdtheLIGHTkeyandpressCOLDERthree
times.Thiswillchangeallvaluesto°C.Whenthe
keycombinationisacceptedthecontrolwillchange
values.
Showroom Mode
Thismodeisdesignedtoshowunitsinadisplay
environment.Wheninthismodetheonlyfunctions
willbethecontrolsandcabinetlights.The
compressor,fans,etc.willnotoperate.Toenterthis
mode,holdtheCOLDERkeyandpresstheLIGHT
buttonthreetimes.Whenentered,thedegree
symbolwillbetoash.Whenthedegreesymbolis
ashingtheunitwillallowtheuseofthecontrolfor
demonstrations.Afternottouchingtheunitforone
minutethedisplaywillbeginto“snake”around.This
ismeanttoalertyoutheunitisinshowroommode.
Theunitcanbeleftinthismodeindenitely.Ifyou
againwanttodemothecontrol,touchanykeyand
thedegreesymbolwillbegintoash.To exit this
mode: thismodeneedstobeexitedbythesame
keycombinationasusedtoenterthemode.
Service Mode
Thismodehas16differentoptionsavailablefor
servicediagnostics.Toenterthemodeholdthe
WARMERkeyandpresstheLIGHTbuttonthree
times.Thedisplaywillshow“0’.Wheninthismode
theWARMERandCOLDERkeyswillactasup
anddownarrowstoselectthedesiredoption.
TheLIGHTkeyistheENTERkeyandwillentera
function.ToexittheServiceMode,scrolltooption
99andpresstheLIGHTkey.Afterveminutes
ofnottouchinganykeysthemodewillalsoexit
automatically.