• b5-14 > 0 in Wire Break (Run at Fixed Speed Mode)
The drive detects an LOP condition when the output frequency rises above the LOP detection frequency, and the measured
quantity (current, power, or torque) falls below the LOP detection level.
When the condition is detected for longer than the time set in P1-20, Prime Loss Time, the drive will respond according to the
P1-22, Prime Loss Selection, setting.
Setting 0: Current (A)
U1-03, Output Current, is compared against LOP detection level parameters P1-19, P4-05, P4-08, P5-06, P5-07, and b5-14.
The unit text of the LOP Detection Level parameters is A (Amps).
Setting 1: Power (kW)
U1-08, Output Power, is compared against LOP detection level parameters P1-19, P4-05, P4-08, P5-06, P5-07, and b5-14.
The unit text of the LOP Detection Level parameters is kW.
Setting 2: Torque (%)
The drive calculated torque (U6-01, Motor Secondary Current (Iq in V/f) is compared against LOP detection level parameters
P1-19, P4-05, P4-08, P5-06, P5-07, and b5-14. The unit text of the LOP Detection Level parameters is percentage (%).
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P1-19: Prime Loss Level
Detects loss of prime in the pump when in AUTO or Sleep Boost mode. If the measured quantity determined by P1-18 drops
below this level for the time specified in P1-20 and the output frequency is above the level determined by P1-21, a “Loss Of
Prime” condition occurs. The drive will respond to the “Loss Of Prime” condition based on the P1-22 setting.
No. Name Setting Range Default
P1-19 Prime Loss Level 0.0 to 1000.0 A 0.0 A
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P1-20: Loss of Prime Time
Sets the delay time before a “Loss of Prime” condition occurs. The pump protection criteria specified in P1-18 and P1-19 must
be met before the timer will start.
No. Name Setting Range Default
P1-20 Loss of Prime Time 0 to 600 s 20 s
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P1-21: Loss of Prime Frequency
If P1-21 is set to a non-zero value, when the drive is operating above the frequency set in this parameter, the “Loss Of Prime”
detection is enabled. If this parameter is set to zero, the frequency level will be determined by the smaller value between (Fmax
- 1 Hz) and (d2-01 - 1 Hz).
No. Name Setting Range Default
P1-21 Loss of Prime Frequency 0.0 to [E1-04] 0.0 Hz
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P1-22: Loss of Prime Selection
Determines drive response to a “Loss Of Prime” condition.
No. Name Setting Range Default
P1-22 Loss of Prime Selection 0 to 2 0
Setting 0: Fault
Setting 1: Alarm
Setting 2: Digital out only
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P1-23: Loss of Prime Maximum Restart Time
If the Loss of Prime fault restart fails (or is not attempted due to a continuing fault condition), the drive will wait for the time
set in P1-23 before attempting another restart.
Note: This parameter will take the place of L5-04 during a Loss of Prime fault restart attempt.
No. Name Setting Range Default
P1-23 Loss of Prime Maximum Restart Time 0.2 to 6000.0 min 0.2 min
5.11 P: Pump
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
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Parameter Details
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