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EOI
Function
Display
Overvoltage
OP 2
(Decel)
OP 3
Overvoltage
(Run)
Overtorque Trip
OT
P-ER
Frequency Point
Setting Error
Alarm
POFF
Control Circuit
Undervoltage
186
Description
This fault is caused by an
overvoltage condition
during deceleration.
The bus voltage exceeds
specifications while
running.
This fault is caused by a
torque requirement by the
load in excess of the setting
of
F616
or
F617
for a time
longer than the setting of
F618.
This alarm is provided to
notify the operator that two
speed reference frequency
setpoint settings are too
close to each other. This
condition may occur when
configuring the gain and
bias of the analog inputs of
the Control Terminal Strip
when operating in the
Speed or Torque Control
modes.
This fault is caused by an
undervoltage condition at
the 5, 15, or the 24 VDC
supply.
Possible Causes
• The decel time is too short.
• The DBR resistance value is
too high (F308).
• The DBR function is turned
off.
• The Overvoltage Stall
feature is turned off.
• The incoming utility power
level is above the specified
range.
• The incoming utility power
level is above the specified
range.
• System is regenerating.
• Unstable load.
ASD is too small for the
application.
F616
or
F617
settings are too
low.
Frequency settings are too
close to each other.
Defective control board.
Excessive load on the power
supply.
Low input voltage.
Corrective Action
• Extend the decel time
setting.
• Decrease the DBR value.
• Install a DBR and enable
the DBR feature.
• Enable the Overvoltage
Stall feature.
• Install an input
inductance onto the ASD
AC input to minimize
voltage spikes.
• Install a DBR.
• Install an input
inductance onto the ASD
AC input to minimize
voltage spikes.
• Balance the load.
• Ensure that the ASD is
properly matched to the
application.
• Ensure that the
F616
and
F617
settings are
appropriate for the
application.
• Ensure that the load is
unobstructed.
• Increase the range
between the two
frequency settings.
• Replace the control board.
• Ensure that the input
voltage is as specified.
• Make a service call if the
failure persists.
H7 ASD Operation Manual
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Table of Contents
Troubleshooting
