Head Control Board Cooling Fan

Error code
  • 030921 Head Drive Board Cooling Fan error
Occurrence condition
  • Fan has not reached the specified rotation speed.
Assumed cause
  • foreign substances tucking
  • Poor connection of connector
  • Fan Motor failure
  • Main Board failure
Defect-related parts
  • Head Board Cooling Fan
  • Main Board
Troubleshooting
Step Confirmation and action YES NO
1

Check the fan driving operation

  • Check the operation for each fans using the diagnostic function.

<Diagnostic function>

  • Target function: 30101** XX Fan
  • Judgment method: operation sound

Did you confirm the operating sound of the fan?

 Go to step 2 Go to step 3
2

Check fan lock signal

  • Check the drive detection for each fans using the diagnostic function.

<Diagnostic function>

  • Target function: 30102** XX Fan
  • Judgment method: drive the target fan and check the value changing.

Did you confirm the value changing?

Replace the Main Board

 Go to step 4
3

foreign substances tucking

  • Is there foreign substances tucking in the fan?
 Removal of foreign substances Go to step 4
4

Check the connection of the connector

  • Is the connector half-inserted to the corresponding fan?

Connect securely

 Replace a fan