Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 518)

7-34 Troubleshooting
7000L-UM300I-EN-P – June 2013 7000 “C” Frame
WARNING
MESSAGE
WARNING
CODE
DESCRIPTION RECOMMENDED ACTIONS
Bypass UV 185 The measured Line-Side Bypass Voltage is
less than Line Undervoltage Trip (P167) for
the period set by Line Undervoltage Delay
(P166).
– Verify the VSB connections and tap
settings, and check resistance of VSB
board – Megger board to confirm integrity
– Check for possible source voltage
supply problems
– Use Multimeter and Oscilloscope to
check voltages on the drive test points
Bypass Volt UB 186 The measured Line-Side Bypass Voltage
has exceeded the value set in Line Voltage
Unbalance Trip (P271) for the duration set in
Line Voltage Unbalance Delay (P272).
– Verify the VSB connections and tap
settings, and check resistance of VSB
board – Megger board to confirm integrity
– Check for possible source voltage
supply problems
– Use Multimeter and Oscilloscope to
check voltages on the drive voltage test
points
CIB Battery Low 159 The battery on the CIB that powers the
NVRAM has reached a preset low level of
2.6VDC. – Replace the PowerCap on the CIB
board
Conductivity Hi
(C-FRAME ONLY)
147 The measured conductivity is greater than
1 μS/cm
3 .
– Verify that no foreign debris has entered
the system (iron piping, non-deionized
water, etc.)
– There is no immediate need for action,
but be prepared to change the de-ionizing
cartridge and run the system, verifying
that the conductivity is decreasing
Coolant Level Lo
(C-FRAME ONLY)
148 The level of the coolant in the reservoir has
dropped below the low level warning
indicator, activating the warning.
– You will lose coolant over time through
evaporation, but you should still verify
that there are no slow leaks in the
system
– Add de-ionized water to the system
since this is what normally evaporates,
and check the coolant mixture with a
glycol tester
Coolant Temp Low
(C-FRAME ONLY)
145 The measured coolant temperature has
dropped below 10°C (50°F). The warning
will not clear until the temperature rises
above 15°C (58°F).
– Verify that the thermostatic bypass valve
(V10) was not left open
– Warm up the control room ambient to
get the drive to an operational level
Coolant Temp Hi
(C-FRAME ONLY)
146 The measured coolant temperature has
exceeded 48°C (120°F). The warning can
not be cleared until the temperature has
dropped below 44°C (110°F). – Verify the heat exchanger fans are
operating
– Verify that the thermostatic valve is fully
opened
– Check that all valves are in the normal
operating position
Ctrl Power Loss 191 This warning tells the drive that the control
power has dipped, and this is used in the
Autorestart feature algorithm as an indicator
to tell the drive to stop gating and wait for
control power to return
– Investigate reliability of the control power
– Ensure the drive operates as expected
when there is a control power outage
(UPS must be installed)