Inverter Protection
6-77
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 10
°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 on the Inverter capacity. The value for a 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
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
L8-02
Overheat pre-
alarm level
Sets the detection temperature
for the Inverter overheat detec-
tion pre-alarm in °C.
The pre-alarm detects when the
cooling fin temperature reaches
the set value.
50 to
130
95 °C*NoAAAA4AEH
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 NoAAAA4AFH
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