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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 10
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.
nRelated Parameters
Name
Param-
eter
Num-
LCD Display
ber
Overheat pre-alarm level
L8-02
OH Pre-Alarm Lvl
Operation selection after
overheat pre-alarm
L8-03
OH Pre-Alarm Sel
Description
Sets the detection temperature for the Inverter
overheat detection pre-alarm in °C.
The pre-alarm detects when the cooling fin tem-
perature 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 setting 0 to 2 and a minor
fault will be given in setting 3.
Inverter Protection
°
C.
Control Methods
Change
Setting
Factory
during
Range
Setting
Opera-
V/f
tion
50 to 130
95°C
No
A
0 to 3
3
No
A
Open
V/f
Loop
with
Vec-
PG
tor
A
A
A
A
61
6-
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Troubleshooting
