YASKAWA iQpump1000 Quick Start Manual page 199

HOA Keypad Display
LT-4
Cause
IGBTs have reached 50% of their expected
performance life.
HOA Keypad Display
Net Flow Meter
Lost, Chk Source
Cause
When P1-01 = 3, P6-01 > 0, and P9-40 = 3,
the flow meter function has not received a
valid flow rate from another drive that is
also running the flow meter function.
HOA Keypad Display
NETSCAN
Waiting for Master
Cause
No message was received from the master
within the time set in P9-28.
HOA Keypad Display
NMS
Cause
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 1 (alarm).
HOA Keypad Display
oH
Cause
Surrounding temperature is too high
Internal cooling fan has stopped.
Airflow around the drive is restricted.
HOA Keypad Display
oH2
Cause
An external device triggered an overheat
warning in the drive.
YASKAWA TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide
IGBT Maintenance Time (50%)
IGBTs have reached 50% of their expected performance life.
Note: An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Check the load, carrier frequency, and output frequency.
Net Flow Meter Loss
There is no drive on the MEMOBUS network with an analog flow meter.
• Set P9-40 to 0 if the drive has an operational flow meter connected to an analog or pulse input terminal.
• If another drive on the MEMOBUS network has a flow meter connected to an analog or pulse input
terminal, confirm that drive is online with parameter settings P6-01 > 0 and P9-40 = 0.
NETSCAN
Drive is waiting for a message from the master.
• 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.
Not Maintaining Setpoint
The setpoint cannot be maintained and P1-17 is set to 1.
• Check for a blocked impeller, over cycling, or broken pipe.
• Set the Not Maintaining Setpoint alarm characteristics in P1-16 and P1-17.
• Drive response to this condition is controlled by P1-17, Not Maintaining Setpoint Selection.
Heatsink Overheat
The temperature of the heatsink exceeded the overheat pre-alarm level set to L8-02.
• Check the surrounding temperature.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool surrounding area.
• Remove anything near drive that may cause extra heat.
• Replace the cooling fan.
• After replacing the drive, set parameter o4-03 to 0 to reset the cooling fan operation time.
• Provide proper installation space around the drive as indicated in the manual.
Orientation and Spacing on page 34
• Allow for the proper space and ensure that there is sufficient circulation around the control panel.
• Check for dust or other foreign materials clogging the cooling fan.
• Clear debris caught in the fan that restricts air circulation.
Drive Overheat Warning
"Drive Overheat Warning" was input to a multi-function input terminal, S1 through S8 (H1-oo= B).
Search for the device that tripped the overheat warning. Remove the cause of the problem.
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
for details.
Minor Fault Name
Possible Solution
5.3 Alarm Detection
Refer to Installation
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