Operation Selection After Cooling Fan Fault - YASKAWA Varispeed G7 Instruction Manual

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.
Related Constants
Name
Con-
stant
Display
Number
OH1 detection
0: Disabled (FAN minor fault
of Inverter' s
L8-32*
cooling fan
1: Enabled (OH1 major fault
OH1 Detect Sel
* Applicable for G7-Series Inverters with software versions PRG:1038 or later.
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.
Setting
Fault
Value
Cooling Fin Overheating
0
Inverter's Cooling Fan Fault FAN (blink)
Cooling Fin Overheating
1
Inverter's Cooling Fan Fault OH1 (lit)
* 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
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.
IMPORTANT
During a cooling fan fault, the cooling fan stops for about 3 seconds every minute (interval operation.)
Setting
Description
Range
detection)
0 or 1
detection)
Digital Operator
OH1 (lit)
OH (lit)
Control Methods
Change
Open
Factory during
V/f
Loop
Setting Opera-
V/f with
Vector
tion
PG
1 No A A
Multi-function Con-
Motor Operation
Coast to a stop Fault
*
Minor fault
Continue operation
Coast to a stop Fault
Coast to a stop Fault
Continuing Operation
MEMO
Open
BUS
Flux
Loop
Regis-
Vec-
Vector
ter
tor
1 2
A
A A 4E2H
tact Output
6-
73