BENSHAW M2L 3000, Руководство пользователя

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8 – Fault Conditions
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Table 22: Fault Conditions
Fault
Code
Fault Displayed
Reaction
Type
Description Course of Action
701 Converter fault C,S
Occurs when 120 VAC is removed
from
Digital Input 2 on the Remote IO.
Digital Input 2 on the Remote IO is intended
to monitor failsafe (normally closed)
temperature switches in the converter
section of the drive.
It is intended for Digital Input 2 on the
Remote IO to monitor failsafe (normally
closed) protective devices such as
temperature or airflow switches in the
converter section of the drive, or the
combined transformer and converter section
of the drive. Determine if those switches
have tripped or have malfunctioned.
Verify that 120 VAC is being supplied to
those switches. If not, check the input fuse
and output fuse of the 120 VAC control
power transformer (T3).
This could be caused by digital inputs on the
Remote IO other than Digital Input 2 being
programmed as a “Converter Fault Low”
input. Check settings for
Digital Input #4
Function (IO-03) through Digital Input #8
Function (IO-07) and verify that none are set
to “Converter Fault”.
Verify that all fans for the converter cabinet
are working. Check and replace fuses as
necessary.
Verify that the filters for the converter cabinet
are not clogged. Clean as necessary.
702 Ground Current fault C,S
Occurs when excessive ground
currents are detected.
The ground fault current is detected by a
circuit on the Precharge Board in the power
wire connection section of the inverter. The
circuit produces a bi-polar signal that is
connected to Analog Input 1 on the Remote
IO. A ground fault is declared when the
absolute value of the level on that input
exceeds 5V.
Open the inverter and visually inspect to
ensure that no wires are touching any of the
cells.
Visually inspect power wiring including the
DC bus and motor leads. Pay particular
attention to any splices that may be in the
motor leads.
Disconnect the motor leads from the drive
and Megger the motor through the motor
leads. Use a megaohm meter / insulation
tester capable of producing the motor’s rated
voltage.