Quattro DC Troubleshooting
115
Name Description
Possible Causes & Corrective Action
Mtr Overload
(alarm)
The motor had exceeded the
user defined motor overload
curve.
Verify Overload Curve Parameters
Check both OVLD START LEVEL (A6) and
OVLD TIME OUT (A6) parameters.
Excessive Field Weakening
Verify that FULL FLD AMPS (A6) and WEAK
FLD AMPS (A6) are set correctly so that motor
can produce rated torque
Verify that motor armature voltage is correct
for applied speed and load
Accurate Motor Parameters
Verify motor nameplate values are entered
correctly
Excessive Current Draw
Decrease accel/decel rate
Verify elevator counterweights
Verify mechanical release of elevator brake
Motor Problem
Check for motor failure
Check for faulty motor wiring
Mtr Settings
The fault looks for proper motor
values.
Improper Parameter Setting
Verify RATED MOTOR CURR (A6) setting
Verify ARMATURE VOLTS (A6)
Verify FULL FLD CURRENT (A6)
No Drv
Handshake
(operator serial
link error)
The operator lost
communications with the
drive’s control board.
Bad Connector Connection
Remove and re-seat the operator in its cradle.
If re-occurs, the operator or the drive’s control
board may need to be replaced.
No Field Cable
A disconnected field cable has
been detected.
Missing Cable
Verify Field Supply (A24J1 or A3JP1)
connector and Current Sense (A4JP4) cable
are connected and properly seated
Note: This fault cannot be reset, unit must be
powered down before fault will clear.
NTSD Logic In
This fault will be active if:
The NTSD Mode (C1)
doesn’t match the
input set in the C2
sub-menu
Check Parameters Settings:
Verify the correct NTSD Mode (C1) is selected
Verify Logic Input 1 - 9 in C2 is set for the
correct NTSD Input
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