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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
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.
Related Parameters
Param-
eter
Number
Overheat
pre-alarm
level
L8-02
OH Pre-
Alarm Lvl
Operation
selection
after over-
heat pre-
alarm
L8-03
OH Pre-
Alarm Sel
* The factory setting depends on the Inverter capacity. The value for a 200 V Class Inverter of 0.4 kW is given.
-80
6
Name
Description
Display
Sets the detection tempera-
ture for the Inverter overheat
detection pre-alarm in °C.
The pre-alarm detects when
the cooling fin temperature
reaches the set value.
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 set-
ting 0 to 2 and a minor fault
will be given in setting 3.
°
C.
Control Methods
Change
Setting
Factory
during
Range
Setting
Opera-
V/f
tion
50 to
95 °C
No
A
130
*
0 to 3
3
No
A
Regis-
V/f
Open
Flux
ter
with
Loop
Vec-
PG
Vector
tor
A
A
A
4AEH
A
A
A
4AFH
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Troubleshooting
