Omron VARISPEED L7 User Manual

6-47
6
Inverter Protection
 Inverter Overheat Protection
The Inverter is protected against overheating using a thermistor that detects the heatsink temperature.
When the overheat temperature level is reached the inverter output is switched off.
To prevent a sudden and unexpected stop of the inverter due to an over temperature, an overheat pre-alarm can
be output. The temperature level for that pre-alarm can be set in parameter L8-02. Using parameter L8-03 the
inverter operation when an over temperature occurs can be selected.
If a multifunction output is set to this function the output is switched ON when the heatsink temperature
exceeds the overheat pre-alarm level set in L8-02.
Related Parameters
Multifunction Outputs (H2-01 to H2-03)
 Input Open Phase Protection
*
This function detects an open input phase by observing the DC bus voltage ripple level.
Related Parameters
The factory setting is enabled. It is not recommended to disable this function.
* This function is not available in software version VSL701034 and higher.
Parameter
No.
Name
Factory
Setting
Change
during
Operation
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
Closed
Loop
Vector
(PM)
L8-02 Overheat pre-alarm level
95°C
*1
*1. The factory setting depends on the inverter capacity.
No AAAA
L8-03 Inverter overheat (OH) pre-alarm operation selection 3 No A A A A
Set Value Function
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
Closed
Loop
Vector
(PM)
20 Inverter overheat (OH) Yes Yes Yes Yes
Parameter
No.
Name
Factory
Setting
Change
during
Operation
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
Closed
Loop
Vector
(PM)
L8-05 Input open-phase protection selection 1 No A A A A

Omron VARISPEED L7 Specifications

General

Brand	Omron
Model	VARISPEED L7
Category	Inverter
Language	English