Yaskawa iQpump Micro Manuel d'utilisateur télécharger pdf (Page 171)

Digital Operator Display Fault Name

LOP

Loss of Prime

The pump has lost its prime.

Cause Possible Solution

The pump load, measured based on the

P1-18 setting (output current, kilowatts, or

power), has dropped below the level set in

P1-19, Prime Loss Level, for the time set in

P1-20, Loss of Prime Time, and the output

frequency has risen above P1-21, Prime

Loss Frequency. This is effective only

when P1-22 Loss of Prime Selection is set

to 0 (fault).

• Check for a dry well, air in the system, or no water in the system. Restart the pump using the preferred

priming method suggested by the pump manufacturer.

• Set the Loss of Prime fault characteristics in P1-18, P1-19, P1-20, and P1-21.

• Drive response to this condition is controlled by P1-21, Loss of Prime Selection.

• Auto-restart of this fault is controlled by L5-51, Loss of Prime Fault Retry Selection and P1-23, Loss of

Prime Maximum Restart Time after Fault

Digital Operator Display Fault Name

LWL

(LOH20)

Low Water Level

The “Low Water Level” digital input is active (H1-0o = 8F).

Cause Possible Solution

The Low Water Level switch is activated,

defective, or P1-30, Low Water Digital

Input Configuration, is programmed

incorrectly.

Raise the water level and/or adjust the Low Water Level switch.

Digital Operator Display Fault Name

MSL

Net Master Lost

(NSL)

Net Master Lost

The MEMOBUS master has been lost

Cause Possible Solution

Network Recovery is set to Fault MSL

(P9-27 = 3) and no message has been

received from the master within the time set

in P9-26.

• Increase the P9-26 setting to account for network latency.

• Verify that there is a drive on the network with parameter P1-01 set to 3 and P9-27 to 0.

• Check network connections and verify H5-01 and P9-25 settings for all drives on the network.

Digital Operator Display Fault Name

NMS

(NOTSP)

Not Maintaining Setpoint

The setpoint cannot be maintained and P1-17 is set to 0.

Cause Possible Solution

When the feedback deviates from the

setpoint at a level greater than P1-15, for a

time set in P1-16. This is effective only

when P1-17 is set to 0 (fault).

• Check for a blocked impeller, over cycling, or broken pipe.

• Set the Not Maintaining Setpoint fault characteristics in P1-16 and P1-17.

• Drive response to this condition is controlled by P1-17, Not Maintaining Setpoint Selection.

• Auto-restart of this fault is controlled by L5-50, Setpoint Not Met Retry.

Digital Operator Display Fault Name

nSE

Node Setup Error

A terminal assigned to the node setup function closed during run.

Cause Possible Solution

The node setup terminal closed during run.

Stop the drive when using the node setup function.

A Run command was issued while the node

setup function was active.

Digital Operator Display Fault Name

Overcurrent

Drive sensors detected an output current greater than the specified overcurrent level.

Cause Possible Solution

The motor has been damaged due to

overheating or the motor insulation is

damaged

• Check the insulation resistance.

• Replace the motor.

5.2 Fault Detection

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Troubleshooting

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Yaskawa iQpump Micro Manuel d'utilisateur Page 171

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