Airman

TH INDICATION

UnclassifiedSpeed

What This Code Means

Protection circuit operates to stop the output of the inverter during acceleration; Protection circuit operates to stop the output of the inverter during constant-speed operation; Protection circuit operates to stop the output of the inverter during deceleration or stoppage; Electronic thermal function operates to stop the output of the inverter to protect the output transistor; Pre-alarm indication (TH indication) appears; Protection circuit operates to stop the output of the inverter

Possible Causes

  • •Inverter output current reaches about 170% of the rated current during acceleration
  • •Inverter output current reaches about 170% of the rated current during constant-speed operation
  • •Inverter output current reaches about 170% of the rated current during deceleration
  • •Inverter output current equal to or higher than 120% of the rated current flows but remains less than 170% for 60 seconds (inverse time characteristics)
  • •Motor is overheated to 85% of the setting value of the electronic thermal function due to overload during constant-speed operation
  • •Motor is overheated to 85% of the setting value of the electronic thermal function due to decrease in cooling performance during constant-speed operation
  • •Overheating reaches the specified limit value of the electronic thermal function

Suggested Actions

  1. 1Contact nearest office or distributor for details and countermeasures because technical knowledge is required

Related Airman Fault Codes

OVERCURRENT SHUTDOWN DURING ACCELERATIONOVERCURRENT SHUTDOWN AT A CONSTANT SPEEDFAIL TO STARTWATER TEMP HIGHWATER TEMPERATURE HIGHTHOVER VOLTAGEOVER CURRENTOUTPUT PHASE FAILURELOW FUEL
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