Troubleshooting
140
Name
Description
Possible Causes & Corrective Action
Contactor Flt
The command to close the contactor
and the contactor feedback do not
match for the time specified by the
Contact Flt Time parameter
.
Check Parameter Settings and Contactor
➲
Check CONTACT FLT TIME (A1) parameter
for the correct contactor fault time.
➲
Check wiring to logic input configured as
CONTACT CFIRM
➲
Contactor hardware problem
If nuisance fault, the fault can be disabled by
CONT CONFIRM SRC (C1) parameter (set to
none).
Cube data Flt
The cube (drive) parameters
checksum is invalid.
Parameters Corrupted
➲
Re-enter parameters and power-cycle
➲
If re-occurs, replace Drive Control board
Cube ID Fault
The identification number for the drive
is invalid.
Hardware Problem
➲
Power cycle the drive.
➲
If re-occurs, replace Drive Control board
➲
If re-occurs, the drive needs to be replaced
Curr Reg Flt
[closed-loop]
Actual current does not match the
command current. The drive is
commanding more motor voltage then
is available on the input.
Current Regulation problem
➲
Check for a low input line
➲
Check if drive accurately reading the dc bus
•
Measure the dc bus with a meter
•
Compare that with the value on the digital
operator, DC BUS VOLTAGE (D2)
➲
Complete Adaptive Tune and Inertia
procedure.
➲
Check for a possible motor open phase
➲
Check if contactor is closing.
➲
Check for accurate motor parameters (A5)
•
Verify motor nameplate values are
entered correctly
•
Complete Adaptive Tune and Inertia
procedure.
•
As a last step, calculate motor
parameters from motor’s equivalent
circuit.
➲
Otherwise, replace the drive
DB VOLTAGE
or
DB VOLTAGE
(alarm)
Dynamic braking IGBT is still on ten
seconds after the drive stops running
Too High of Braking Resistor Value
➲
Check for no braking resistor
➲
Possible Brake IGBT Failure
➲
Possible brake resistor is open
Dynamic Braking Wiring Problem
➲
check dynamic brake hardware wiring
High Input Voltage
➲
Decrease input AC voltage with the proper
range (see specifications in technical manual)
➲
Use reactor to minimize voltage spikes
Drive Accurately Reading the DC Bus
➲
Measure the dc bus with a meter
➲
Compare that with the value on the digital
operator, DC BUS VOLTAGE (D2)
Hardware Problem
➲
Replace Drive Control board
➲
Replace Drive