Danfoss TTS400

4. Cyclepowerandreattemptcommunicationwiththecompressor.
4.27.3 BMCC Battery and Verification
AllBMCCprintedcircuitboards(PCBs)includeareal-timeclockintegratedcircuit(RTC-IC)forthepurposeof
maintainingthetimeanddateofcompressorevents.Whilepowerisappliedtothecompressor,theBMCCreceives
a5VsupplyviatheBackplanetopowertheRTC-IC.ThebatterybecomestheRTC-ICpowersupplyandmaintainsthe
dateandtimeonlyintheeventofapowerloss,iftheBMCCisinstalledonacompressorthatisnotpoweredon,orif
theBMCCwasneverinstalledonacompressoratall.
TheBackupBatterydoesnotaffecttheoperationofthecompressorinanyway,nordoesithaveanyadverseeffects
onthesoftwarewithintheBMCC.Infact,theonlywaytoknowifthebatterymaybedefectiveistoverifythecorrect
timewaskeptaftertheBMCClostits5Vsupplyforanyreason.
4.27.3.1 BMCC Battery Safety
ThebatteryusedintheBMCCisacointypelithiumstyle.ThepartnumberisBR1225.Thisbatteryisnotsoldby
DanfossLLCbutcanbelocallysourcedatmoststoresthatsellcoin-typebatteries.
• • • DANGER! • • •
Pleasefollowthesafetywarningslistedinthissection.

Please observe the following safety warnings:
l
Verifythebatteryisproperlyinstalled(“+”sidefacingup,awayfromthePCB)
l
Donotattempttochargethebattery
l
Donotdeform,short,orheatupthebattery
l
Keepthebatteryawayfromsmallchildrenandpets.Aphysicianshouldbecontactedimmediately
ifthebatteryisswallowed
l
Wrapinsulatingtape,suchaselectricaltape,aroundthebatterypriortodisposal
l
Alwaysrefertolocalrequirementsinyourareatoensurethebatteryisproperlydisposed
4.27.3.2 BMCC Battery Verification
Toverifytheintegrityofthebattery,theBMCCcasemustbeseparated.
• • • CAUTION • • •
TheBMCCissensitivetoESD,whichcanrendertheBMCCsoftwareuseless.Whenattemptingtoverifytheconditionofthebackupbattery,
refertoSection1.9HandlingStaticSensitiveDevicesonpage24inthismanual.

NOTE
Thisshouldonlybeperformedwhenwarrantyhasexpired.

1. RemovetheBMCC.RefertoSection4.27.4.1BMCCRemovalonpage222.
2. SeparatetheBMCCcasebyremovingorcuttingthestickersthatareappliedtotheseamofthecase
halves.

M-SV-001-EN Rev. H-1/23/2023 Page 221 of 294