Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 192)

Setting 0: Fbase Motor Load Enabled
Setting 1: Fmax Base Motor Load Enabled
UL Detection Level
L6-02
(0 to 300%)
0 Fmin Fbase
1/f
Fmax
Output
Frequency
L6-14
Motor Underload
Protection at Fmin
Figure 5.49 Motor Underload Protection
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. Name Setting Range Default
L6-14 Motor Underload Protection Level at Minimum Frequency 0 to 300% 15%
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 is set for the oH pre-alarm (H2-oo = 20), the switch closes when the heatsink temperature rises above L8-02.
No. Name Setting Range Default
L8-02 Overheat Alarm Level 50 to 150 °C Det. by o2-04
n L8-05: Input Phase Loss Protection Selection
Enables or disables the input phase loss detection.
No. Name Setting Range Default
L8-05 Input Phase Loss Protection Selection 0, 1 1
Setting 0: Disabled
Setting 1: Enabled
Enables input phase loss detection. Since measuring the DC bus ripple detects input phase loss, a power supply voltage
imbalance or main circuit capacitor deterioration may also trigger a phase loss fault (PF).
Detection is disabled if:
• The drive is decelerating.
• No Run command is active.
• Output current is less than or equal to 30% of the drive rated current.
5.8 L: Protection Functions
192 YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual