YASKAWA CIPR-GA50C series Technical Manual page 703

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L8-02: Overheat Alarm Level
No.
Name
(Hex.)
L8-02 Overheat Alarm Level
(04AE)
If the heatsink temperature is more than the temperature set in this parameter, the drive detects an overheat pre-
alarm. To enable this function, set one of H2-01 to H2-03 [MFDO Function Select] to 20 [Drive Overheat Pre-
Alarm (oH)].
If the temperature increases to the overheat fault level, the drive will trigger an oH1 [Heatsink Overheat] fault and
stop operation.
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L8-03: Overheat Pre-Alarm Selection
No.
Name
(Hex.)
L8-03 Overheat Pre-Alarm
Selection
(04AF)
0 : Ramp to Stop
The drive ramps the motor to stop in the deceleration time. The output terminal set for Fault [H2-01 to H2-03 =
E] activates.
1 : Coast to Stop
The output turns off and the motor coasts to stop. The output terminal set for Fault [H2-01 to H2-03 = E]
activates.
2 : Fast Stop (Use C1-09)
The drive stops the motor in the deceleration time set in C1-09 [Fast Stop Time]. The output terminal set for Fault
[H2-01 to H2-03 = E] activates.
3 : Alarm Only
The keypad shows oH and the drive continues operation. The output terminal set for Alarm [H2-01 to H2-03 =
10] activates.
4 : Operate at Reduced Speed (L8-19)
The drive decelerates to the level set in L8-19 [Freq Reduction @ oH Pre-Alarm] and continues operation. oH
flashes on the keypad.
oH flashes on the keypad. When the alarm is output, the drive decelerates each 10 seconds. If the drive decelerates
10 times and the alarm continues to be output, the output terminal set for oH Pre-Alarm Reduction Limit [H2-01
to H2-03 = 4D] activates. When the alarm is not output during deceleration, the drive accelerates until it is at the
frequency reference that was applicable before the alarm was turned off.
alarm and the drive operation at a decreased output frequency.
YASKAWA SIEPC71061753A GA500 Technical Manual
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the oH detection level in temperature.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the operation of drives when an oH alarm is detected.
12.9 L: Protection Functions
Description
Description
Figure 12.128
Default
(Range)
Determined by o2-04, C6-
01
(50 - 150 °C)
Default
(Range)
3
(0 - 4)
shows the output of the
703
12