Danfoss Turbocor TTS Series

274 of 282 M-SV-001-EN Rev. G
Figure B-23 Compressor Voltage Troubleshooting Flowchart (Sheet 2)
VerifytheDCbus
throughtheTest
Harness
IsDCbusvoltage
correct?
Verifythe15VAC
throughthetest
harness
Yes
Isolatepower,
removecover,test
allSCRs,andreferto
SCRVerification
4.18.2
No
15VACpresent?
ReplaceSoftStart
andre‐installTop
Cover
SCRspasstest?
No
Yes
No
Replaceallthree
SCRsandre‐install
TopCover
InstallDCBusTest
Harness–Referto
Installationofthe
DCBusTestHarness
1.9.1
B
A
Yes
DisconnectJ2and
J3/J4outputsfrom
DC‐DC
Re‐installTopCover,
thenre‐applymains
power
Applicablefor
PottedDC‐DCsonly
J3PottedDC‐DCs
J4Open‐FrameDC‐DCs