Inverter Protection
6-75
îš‹ Reducing Inverter Overheating Pre-Alarm Warning Levels
The Inverter detects the temperature of the cooling fins using the thermistor, and protects the Inverter from
overheating. You can receive Inverter overheating pre-alarms in units of 1
°C.
The following overheating pre-alarm warnings are available: Stopping the Inverter as error protection, and
continuing operation, with the alarm OH (Radiation fins overheating) on the Digital Operator flashing.
îš„Related Constants
* The factory setting depends upon the Inverter capacity. The value for 200 V Class Inverter of 0.4 kW is given.
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
L8-02
Overheat pre-
alarm level
Sets the detection temperature for
the Inverter overheat detection
pre-alarm in °C.
The pre-alarm detects when the
heatsink temperature reaches the
set value.
50 to
130
95 °C*NoAAAAA4AEH
OH Pre-Alarm
Lvl
L8-03
Operation
selection after
overheat pre-
alarm
Sets the operation for when the
Inverter overheat pre-alarm goes
ON.
0: Decelerate to stop in
deceleration time C1-02.
1: Coast to stop
2: Fast stop in fast-stop time C1-
09.
3: Continue operation (Monitor
display only.)
A fault will be given in setting 0
to 2 and a minor fault will be
given in setting 3.
0 to 3 3 No A A A A A 4AFH
OH Pre-Alarm
Sel
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