Continuing Operation
6-73
îš‹ Operation Selection After Cooling Fan Fault
Use the constant setting to select the operation of the motor after a cooling fan fault occurs. This function can
be used for times when a motor should not be stopped quickly (with an emergency stop.)
A cooling fan equipped for 200 V Class Inverters of 7.5 kW, 15 kW, and 30 to 110 kW, and 400 V Class
Inverters of 5.5 to 15 kW and 55 to 300 kW.
îš„Related Constants
The following table describes the operation of the motor and the display of the Digital Operator in accordance
with the settings of the L8-32 if a cooling fan fault occurred.
* If L8-32 is set to 0, the motor will continue running even if a cooling fan fault occurred. However, the Inverter rated output current and the
overload capacity will be reduced. The rated output current will be reduced to 80% if the normal rated output current is 100%, and the overload
capacity will be reduced to the values as follows.
When CT is selected: 100% per every 3 minutes, 150% per every 15 seconds
When VT is selected: 100% per every 30 seconds, 120% per every 10 seconds
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
L8-32
OH1 detection
of Inverter’ s
cooling fan
0: Disabled (FAN minor fault
detection)
1: Enabled (OH1 major fault
detection)
0 or 1 1 No A A A A
A
4E2H
OH1 检出选择
Setting
Value
Fault Digital Operator Motor Operation
Multi-function Con-
tact Output
0
Cooling Fin Overheating OH1 (lit) Coast to a stop Fault
Inverter’s Cooling Fan Fault FAN (blink)
Continue operation
*
Minor fault
1
Cooling Fin Overheating OH (lit) Coast to a stop Fault
Inverter’s Cooling Fan Fault OH1 (lit) Coast to a stop Fault
If L8-32 is set to 0, be sure to set H2-01 to H2-03 multi-function contact outputs to 10 (minor fault) or to 3D
(Inverter’s cooling fan fault.) If a cooling fan fault occurs, stop the Inverter immediately and replace the cool-
ing fan. If the Inverter continues to run while a cooling fan fault occurs, the Inverter’s cooling ability will be
affected and the Inverter’s internal temperature will increase and shorten the Inverter’s life.
During a cooling fan fault, the cooling fan stops for about 3 seconds every minute (interval operation.)
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