Reducing Inverter Overheating Pre-Alarm Warning Levels - Omron VARISPEED G7 Instruction Manual

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.
Related Constants
Name
Con-
stant
Display
Number
Overheat pre- Sets the detection temperature for
alarm level the Inverter overheat detection
pre-alarm in °C.
L8-02
The pre-alarm detects when the
OH Pre-Alarm
cooling fin temperature reaches
Lvl
the set value.
Operation Sets the operation for when the
selection after Inverter overheat pre-alarm goes
overheat pre- ON.
alarm 0: Decelerate to stop in
1: Coast to stop
L8-03 2: Fast stop in fast-stop time C1-
OH Pre-Alarm
3: Continue operation (Monitor
Sel
A fault will be given in setting 0
to 2 and a minor fault will be
given in setting 3.
* The factory setting depends upon the Inverter capacity. The value for 200 V Class Inverter of 0.4 kW is given.
Setting
Description
Range
50 to
deceleration time C1-02.
0 to 3
09.
display only.)
° C.
Change
Factory during
Setting Opera-
V/f
tion
95 °C* No A
130
3 No A
Inverter Protection
Control Methods
Open Open
V/f Flux
Loop Loop
with Vec-
Vector Vector
PG tor
1 2
A A A A
A A A A
65
6-