3-4 Troubleshooting
7000-TD002A-EN-P – September 2007
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
Auxiliary Prot’n 37 Standard External Fault/Warning Input
included to allow the end-user to install a
protective relay/system status contact that
can activate a drive fault or warning,
depending on configuration of Aux Prot
Class (P445). The message means drive
has detected a fault triggered by the input
wired in the auxillary input of the XIO card.
Also check the 120V wiring and the XIO card.
– Check device responsible for the
auxiliary contact to this input, and
investigate cause of the open contact
status
– Check the 120V signal through the
external device
– Check the XIO board inputs and
parameter status bits
Bypass CtctrOpen 168 The bypass contactor was opened without a
command from the drive. Verify the
contactor feedback and the 120V wiring to
the ACB.
– The drive system needs to have
complete control over all contactors, so
investigation of the specific contactor
fault is required
– Verify contactor feedback
– Verify the control power circuit for the
contactor
– Check permissive string to the contactor
control relay (refer to drawing) -Check
contactor/breaker for physical
malfunction (auxiliaries)
– Check ACB inputs and outputs at J1.
Bypass IsoSwClsd 175 The bypass isolation switch is closed when
it was expected to be open. Verify the
isolation switch mechanical set up and the
120V wiring to the ACB. Depending on the
Operating Mode of the drive, ensure that the
switch is in the proper position.
Bypass
IsoSwOpen
172 The bypass isolation switch is open when it
was expected to be closed. Verify the
isolation switch mechanical set up and the
120V wiring to the ACB. Depending on the
Operating Mode of the drive, ensure that the
switch is in the proper position.
– Depending on the mode of operation
(Normal, System Test, Open-Circuit
Test, DC Current Test, or Open-Loop),
there are specific states for all the
possible system isolation switches (Refer
to the description of the Parameter 141 –
Hardware Options1). Ensure the isolation
switches are in the proper position.
– Verify wiring feedback
– Verify isolation switch mechanical
auxiliary setup
– READ ASSOCIATED DESCRIPTION
CabinetTemp High
(C-Frame Only)
70 The drive has a temperature switch in
several cabinets, and all the N/C switches
are connected in series and fed back to the
XIO input. The levels are set differently for
different cabinets.
– Identify which switch has opened, and
focus on that cabinet
– Check for proper air flow within the
identified section
– Verify muffin fans are operating correctly
– Verify ambient temperature is within
tolerances
Control Pwr Loss 57 There has been a loss or dip in the control
power feeding the drive for more than
5cycles.
– Ensure that the power source is active
and investigate the reliability of the
source.
– Check control power input to ACB
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