3-50 Troubleshooting
7000-TD002A-EN-P – September 2007
WARNING
MESSAGE
WARNING
CODE
DESCRIPTION RECOMMENDED ACTIONS
Rec OvrVoltage 157
The rectifier input voltage given by Rec Input
Volt (P696) has exceeded the trip settings.
A warning is logged first and if the over-
voltage persists for the time delay a fault is
logged.
– This is detected by the hardware circuit in
the ACB.
– Verify the parameters and inspect the
VSB for possible damage.
– Investigate occurrences of bus transients.
Rec DC Cur Gain 172 The current gain calculated for DC Link
current sensing is lower than expected
– Verify that the HECS ratio and burden
resistor match the drive/motor ratings.
Rec AC Cur Gain 174 The current gain calculated for DC Link
current sensing is lower than expected.
– Verify that the HECS ratio and burden
resistor match the drive/motor ratings.
Regulator Limit 60 The regulators in the drive (Current, Flux and
Speed) are running in the limit.
– The auto-tune results may not be
accurate. Verify the input line voltage
and the load conditions.
– Raise the torque limits if necessary and
repeat tuning.
Slave 0-7 Comm 128-135 Slave (0-7) DAN Communication Loss-Master
only. This warning is for parallel drives only
and indicates on the master drive that the
Slave drive has stopped communication in
the link.
– Slave is Off line.
– Check for communication between master
and slave drives
Slave1 UnderVolt 154 This warning is valid for 18-pulse drives only.
The measured slave voltage Slave1 Line Volt
(#P137) is less than the Line UndVolt Lvl
(P167) setting.
Slave2 UnderVolt 155 This warning is valid for 18-pulse drives only.
The measured slave voltage Slave2 Line Volt
(#P138) is less than the Line UndVolt Lvl
(P167) setting.
– Verify the VSB connections and tap
settings, and check resistance of VSB
board – Megger board to confirm integrity
– Check TSN fusing
– Check actual voltage values on the
Terminal for each bridge and the total line
voltage
– Check for possible source voltage supply
problems
– Use Multimeter and Oscilloscope to
check voltages on the drive test points
– Verify the parameter settings
– Verify the tap settings. Investigate
occurrences of bus transients.
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