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Setting 0: Enabled (Base Frequency)
Setting 1: Enabled (Max Frequency)
Motor Underload
Protection at Fmin
n
L6-14: Motor Underload Protection Level at Minimum Frequency
Sets the UL6 detection level at minimum frequency by percentage of drive rated current
No.
L6-14
Motor Underload Protection Level at Minimum Frequency
u
L8: Drive Protection
n
L8-02: Overheat Alarm Level
Sets the overheat alarm (oH) detection level.
The drive outputs an alarm when the heatsink temperature exceeds the overheat alarm level. If the drive is set to continue
operation after this alarm occurs (L8-03 = 4) and the temperature reaches the overheat fault level, the drive will trigger an oH1
fault and stop operation.
When an output terminal is set for the oH pre-alarm (H2-oo = 20), the switch will close when the heatsink temperature rises
above L8-02.
No.
L8-02
n
L8-03: Overheat Pre-Alarm Operation Selection
Sets the operation when an overheat pre-alarm is detected.
Note:
Change L8-03 setting only when necessary.
No.
L8-03
Setting 0: Ramp to Stop
If an overheat alarm occurs, the drive decelerates to stop using the currently selected deceleration time. If a digital output is
programmed for "fault" (H2-oo = E), this output will be triggered.
Setting 1: Coast to Stop
If an overheat alarm occurs, the drive switches off the output and the motor coasts to stop. If a digital output is programmed
for "fault" (H2-oo = E), this output will be triggered.
YASKAWA ELECTRIC SIEP C710636 10C Z1000U HVAC MATRIX Drive Programming Manual
UL Detection Level
L6-02
(0 to 300%)
L6-14
0
Fmin
Figure 1.74 Motor Underload Protection
Name
Name
Overheat Alarm Level
Name
Overheat Pre-Alarm Operation Selection
1/f
Fbase
Fmax
Setting Range
0 to 300%
Setting Range
50 to 150 °C
Setting Range
1.8 L: Protection Functions
Output
Frequency
Default
15%
Default
Determined by
o2-04
Default
0 to 4
4
1
123
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