McQuay RVSS14 Installation, Operation And Maintenance Manual page 50

Metering incorrect
Power Metering not reading
correctly.
PF Meter not reading correctly.
Motor Current or Voltage meters
fluctuating with steady load.
Voltage Metering not reading
correctly.
Current Metering not reading
correctly.
Ground Fault Current Metering not
reading correctly.
50
Condition
CTs installed or wired incorrectly.
CT ratio parameter (FUN 03, P68)
set incorrectly.
Burden switches set incorrectly.
CTs installed or wired incorrectly.
Energy Saver active.
Loose connections.
SCR fault.
Load actually not steady.
Other equipment on same power feed
causing power fluctuations and/or
distortion.
In medium voltage systems, Rated
Voltage parameter (FUN 05, P66) set
incorrectly.
CT ratio parameter (FUN 03, P68)
set incorrectly.
Burden switches set incorrectly.
CTs installed or wired incorrectly.
CT ratio parameter (FUN 03, P68)
set incorrectly.
Burden switches set incorrectly.
CTs installed or wired incorrectly.
Cause
Verify correct CT wiring and verify
that the CTs are installed with all the
White dots towards the input line
side.
Verify that the CT ratio parameter is
set correctly.
Verify that the burden switches are
set correctly.
Verify correct CT wiring and verify
that the CTs are installed with all the
White dots towards the input line
side.
Turn off Energy Saver if not desired.
Shut off all power and check all
connections.
Verify that the SCRs gate leads are
connected properly and the SCRs are
ok.
Verify that the load is actually steady
and that there are not mechanical
issues.
Fix cause of power fluctuations
and/or distortion.
Verify that Rated Voltage parameter
is set correctly.
Verify that the CT ratio parameter is
set correctly.
Verify that the burden switches are
set correctly.
Verify correct CT wiring and verify
that the CTs are installed with all the
White dots towards the input line
side.
Verify that the CT ratio parameter is
set correctly.
Verify that the burden switches are
set correctly.
Verify correct CT wiring and verify
that the CTs are installed with all the
White dots towards the input line
side.
Solution
IOMM Starter