34 Rockwell Automation Publication 7000-TG002J-EN-P - March 2015
Chapter 1 Fault Messages
X Motor Stall 103 The drive has detected a motor stall condition, with a delay
set in Mtr Stall Dly (P191). The different methods of motor
stall detection depend on whether a tachometer/encoder is
installed or not. Sensorless faults involve the motor not
building up enough flux feedback to be detected by the drive,
while tachometer feedback methods look at the difference
between the tachometer/encoder feedback and the speed
command.
Possible Causes:
• Insufficient torque on starting– increase torque command 0 and 1 to avoid motor stalls
when starting if Speed Feedback mode is Sensorless.
• Insufficient torque – Increase torque limit motoring to avoid motor stalls while running.
• Reverse load rotation – Be sure the load is not rotating in the opposite direction.
• Capture the value of parameter FlxFbk VoltModel (P342).
• Be sure that tachometer feedback is functional where applicable.
• Be sure the motor is not spinning forward at a speed greater than reference command.
• While running – make sure there is no sudden increase of the load.
• A short circuit on drive output may get interpreted as motor stall. Check motor filter
capacitors or other apparatus that may be creating a short circuit phase to phase on the
drive output.
X X X X Mstr Transfr Err 457 Master Transfer Error - This is applicable to parallel drives
only.
• The master drive cannot find a slave drive able to take over as master.
• Possible causes are: slave drive not ready, or slave drive masked off.
X MV in Gate Test 165 The drive has medium voltage applied and the user
attempted to program the drive in Gate test. Isolate medium
voltage from the drive and then proceed with the test.
• Check input contactor control and status.
• Be sure that the isolation switch is in the open position and locked out – confirm with hot-
stick and status parameters.
X MV in System Test 164 The drive has medium voltage applied and the user
attempted to program the drive in System test. Isolate
medium voltage from the drive and then proceed with the
test.
• Check input contactor control and status.
• Be sure that the isolation switch is in the open position and locked out – confirm with hot-
stick and status parameters.
X No Output Ctctr 169 This fault is specifically used for Open Circuit test mode, which
demands that an output contactor be specified in Output
Ctctr Cfg (P5). If the contactor is not specified, you will get this
fault in Open Circuit test mode. This is to help avoid
inexperienced people putting the drive in open circuit test
mode without actually open circuiting the output with either
a contactor or by disconnecting the motor cables.
• If there truly is no output contactor in the system, then you can mask the fault. Then there
will be a No DO/OP Ctctr warning, and you can continue with the open circuit test after
disconnecting the motor cables.
X Op Mode Conflict 609 Operating mode of the Follower drive and of the Master drive
do not match.
• Change the operating mode.
X OVH Overspeed 471 The motor speed feedback exceeds 80 Hz and the drive is
experiencing an overhauling load without an output
contactor.
• Verify that parameter Overhauling Load (P1160) and bit 8 (Output Ctctr) of parameter
HardwareOptions1 (P141) are properly set.
• Check recommendations for Fault Code 102, Motor Ovrspeed.
X X X X PD Capcity Low 458 This fault is for parallel drives only and indicates that the
available drive capacity is less than 50% of the motor rated
current. The drive cannot run.
• The available drive capacity is less than 50% of the motor rated current. The drive cannot
run.
X Process Var Loss 464 Feedback from the process is not valid. • Check the process sensor, 4…20 mA or 0...10V input to the drive at IFM board.
• Check the wiring at IFM board and connection between IFM and ACB.
All Drive Types
PF7000A
PF7000B
PF7000C
Marine Drive
Heat pipe Drive
Fault Message Fault Code Description Recommended Action(s)
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