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PROTECTIVE FUNCTIONS
Function
• The inverter stops when a short circuit or an
Overcurrent
protection
overcurrent due to an overload occurs on inverter
output side
• The inverter stops when a ground fault on the
output side is detected at startup
• When the DC link circuit voltage drops below the undervoltage level, the
Under voltage
protection
inverter stops
• When the DC link circuit voltage reaches the
Over voltage
protection
overvoltage level, the inverter stops
• When an abnormal temperature rise is detected in the heat sink, the inverter
Heat sink over-
heating protection
stops
• The inverter stops when internal electronic thermal overload detects an
Electronic thermal
overload relay
overload in:
• the motor (4-pole standard or 4-pole forced air cooled inverter motor)
• the inverter power module
External alarm
• The inverter stops on receiving external alarm signal
input
Memor y error
• The inverter stops in the event of a memory error
CPU error
• The inverter stops in the event of a CPU error
RS485
• The inverter stops in the event of a RS485 communication error
communication
error
NOTES:
*1 If the inverter output is held off while an internal alarm signal is being output, the alarm signal cannot be retained.
*2 No alarm signal is output when automatic restart function has been selected.
Notes:
1) To issue RESET command, press the
the cause of trip
2) Fault history data is stored for the past four trips. Select
13
Description
During
acceleration
During
deceleration
While running at
constant speed
During
acceleration
During
acceleration
While running at
constant speed
key on the keypad panel or connect terminals RST and P24 to clear the trip condition after removing
and press
Digital monitor
• Inverter output stops
• The motor coasts to a stop
• An alarm signal (1SPDT) is
• The alarm remains until
• Inverter output stops
• An alarm signal is output at
• The alarm remains until
• Inverter output stops
• The motor coasts to a stop
• An alarm signal (1SPDT) is
• An alarm remains until
key to review the data.
Operation
output
RESET command is issued*
1
power recovery*
2
RESET command is issued*
1,
*
2
output
RESET command is issued*
1,
*
2
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