Toshiba ACE-tronics G9 ASD Installation And Operation Manual page 260

LCD Screen
Screen
Comm2 Error
*Control Under-Voltage POFF
Drooping
Emergency Lift
External Fault
Forward Limit Switch
Heavy Load
Main Under-Voltage
Maintenance Timer
Motor Overload
* Reset ignored if active.
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LED
Description
CM2
External communications
error.
Under-voltage condition at
the 5, 15, or the 24 VDC
supply.
drop
Encoder pulses received in
excess of F998 setting of the
opposite direction of the
commanded frequency.
LIFT
Hoist-control function
switches from closed-loop
operation to open-loop
operation. Max speed UP =
F657. Max speed DOWN =
F656.
EFLT
Non-faulted ASD in a
multiple ASD system.
FLS
Forward Limit Switch
Activated.
HLD
Output torque requirement
has exceeded the setting of
F337.
MOFF
Under-voltage condition at
the 3-phase AC input to the
ASD.
LTA
Bearing Greaser Time has
expired.
OLM
Load requirement in excess of
the capability of the motor.
Possible Causes
• RS485 Failure.
• Improperly programmed ASD.
• Improper communications settings.
• Improperly connected cables.
• Defective Control board.
• Excessive load on power supply.
• Low input voltage.
• Requirements of the load are in excess of the
capability of the motor.
• Falling load.
• Encoder feedback signal has been lost and
discrete input terminal
F867 is set to Enabled.
• ASD of a multiple ASD system has faulted
— the non-faulted ASD(s) incur an External
Fault.
• Crane has approached the end-of-travel for
the selected operating plane as indicated by
the limit switch.
• Load too heavy for motor.
• Resets when output torque requirement drops
below the setting of F337
• Low 3-phase utility voltage.
• Bearing Greaser Alarm Time setting has
expired (F621).
• Ambient Average Temperature Time setting
has expired (F634).
• V/f parameter improperly set.
• Motor is locked.
• Continuous operation at low speed.
• Load too heavy for motor.
ACE-tronics G9 ASD Installation and Operation Manual
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