Programming 133
L8-10 Heatsink Cooling Fan Operation Selection
L8-11 Heatsink Cooling Fan Operation Delay Time
Setting Range: 0 to 300 Seconds
Factory Default: 300 Seconds
Parameters L8-10 and L8-11 allow the Drive programmer to customize the heatsink cooling fan operation. Parameter L8-10
determines whether the cooling fans are always ON whenever the Drive is powered (L8-10= “1: Fan Always On”) or if the
cooling fans are only ON when the Drive is in a Run condition (L8-10= “0: Fan On-Run Mode”).
Parameter L8-11 is a delayed OFF for the cooling fan if L8-10= “0: Fan On-Run Mode”. When the cooling fans are set to turn
OFF when the Run command is removed, parameter L8-11 will cause the fans to continue cooling the Drive for the amount of
time programmed into L8-11 after the Run command is actually removed. The Drive can be programmed to allow the cooling
fan to run for up to 5 minutes (factory default) after the run command is removed.
Both parameters are intended to extend fan life while still providing sufficient cooling for proper Drive operation.
Fig. 97 Heatsink Cooling Fan Operation Timing Diagram
L8-12 Ambient Temperature Setting
Setting Range: 113 to 140
o
F (45 to 60
o
C)
Factory Default: 113
o
F (45
o
C)
Set parameter L8-12 to the temperature
o
F (
o
C) of the area in which the Drive is mounted. If L8-12 exceeds the actual rated
ambient temperature of the Drive 113
o
F (45
o
C), the OL2 fault level will be de-rated as shown in the figure below. This will
allow the user to trade-off lighter drive loading for operation in a higher ambient temperature.
Fig. 98 Ambient Temperature Derating Curve
Setting Description
0 Fan On-Run Mode (factory default)
1 Fan Always On
t
t
Run
Command
Heatsink Fan
RUN
L8-11
ON (CLOSED)
OFF (OPEN)
OFF (OPEN)
ON (CLOSED)
TIME
0
100%
45
o
C
60
o
C
Ambient Temp.
L8-12
OL2 Rating
OL2 Fault Level
113
o
F
(45
o
C)
(60
o
C)
140
o
F
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