252 ACE-tronics G9 ASD Installation and Operation Manual
*Over-Voltage OP DC bus voltage exceeds
specifications.
• ASD attempting to start into a spinning motor
after a momentary power loss.
• Incoming utility power is above the specified
range.
• Decel time is too short.
• Voltage spikes at the 3-phase input.
• Inductive filter required.
• DBR required.
• DBR resistance value is too high.
• DBR function is turned off.
• Over-Voltage Stall feature is turned off.
• System is regenerating.
• Load instability.
• Disable the Ridethrough function (F302).
Pre Over-Torque POT Output torque of ASD is
greater than 70% of parameter
F616 setting.
• Parameter F616 requires an adjustment.
• Load requirement exceeds ability of the
motor.
Reverse Limit Switch RLS Reverse Limit Switch
Activated.
• Crane has approached the end-of-travel for
the selected operating plane as indicated by
the limit switch.
Run Before Ready RBR Run command received at
power up or Reset activated
while running.
• F or R terminal on during application of
power or system receives a Reset while
running.
Slack Rope SLCR Output torque level is too low. • Closed-loop Hoist Mode operation in the
reverse direction with F867 enabled, output
torque is less than F868 setting for F869 time.
Switch Out Of Sequence OSF Run command active during
power up or Reset activated
while running.
• Run command active during power up or
Reset activated while running.
Timed Run TRUN Timed Run Active. • Timed Run Activated via discrete input
terminal.
• F861 set to a non-zero value.
Cumulative Run Time OJ Run-time counter exceeded. • Type Reset required; select Clear Run Timer.
Torque Proving TPF Output torque level is too low. • Closed-loop Hoist Mode operation, within
F988 time setting the ASD output torque
level has not reached the F987 setting or is
unable to maintain the F987 setting for F989
time setting during active Run command.
* Reset ignored if active.
LCD Screen
LED
Screen
Description Possible Causes
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