Danfoss Turbocor TTS Series

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M-SV-001-EN Rev. G
Figure B-22 Compressor Voltage Troubleshooting Flowchart (Sheet 1)
Start
Allthreephasesofvoltage
presentaftermainsfuses?
Carefullyremove
MainsInputCover
Withanappropriatelyrated
meter,verifyall3phasesof
voltagebeforethemains
fuses
Verifyand,if
needed,replace
Fuses–Referto
TerminalBlockFuse
Replacement4.3
Electricallyisolate
compressor–Refer
toElectricalIsolation
1.7
Yes
No
RemovetheTop
Cover
Inspectall
electronicsfor
visibledamage
Arethereanysigns
ofvisibledamage?
VerifySoftStart
fuses(Closed‐Top
SoftStartOnly)
No
Replacedamaged
components
AretheSoftStart
fuseswithin
specification?
Replacefuseand
refertoDetermining
theCauseofthe
BlownFuse5.5.2.6
No
VerifyIGBTcableto
theIGBTconnectors
areinstalled
correctly
Yes
VerifyDC‐DC
resistances
Areresistances
correct?
No
ReplaceDC‐DCand
verifyPWMand
bearings–Referto
PWMVerification
4.27.3
Yes
Yes
A
End