Procedure
- The HCF PWB Fuse F10 (+24VDC) has blown.
- An internal short circuit has occurred in the HCF3 Lead Blower Fan/HCF3 End Blower Fan.
- A short circuit has occurred in the harness of the HCF3 Lead Blower Fan/HCF3 End Blower Fan.
NOTE:
The HCF PWB Fuse is a Chip Fuse. If it is open, replace the PWB.
The HCF3 has it’s own power cord. Whenever a procedure states to Power Off and then Power On, POPO, etc., powering Off and then powering On the IOT does NOT Power Off the HCF3. The HCF3 will have to be Powered Off and then On separately from the IOT by unplugging the HCF3 power cord.
Turn the power OFF and remove the HCF3 Tray Cover. Remove the Lead Blower and the End Blower Fan Motor Assy. Turn the fan blade of the Lead Blower and the End Blower Fan Motor manually.
The fan blade rotates smoothly. Yes No Unanswered
Check that there are no foreign substances, etc. in the rotating part of the fan blade. Also check that there is nothing that could impede the airflow. Remove any other mechanical loads.
Disconnect the Lead Blower Fan Motor connector
P/J289
The resistance between P/J289 - 1 and - 3 is approx. 3.95k Ohm. Yes No Unanswered
Replace the Lead Blower Fan Motor. (
PL 29.8)
Disconnect the End Blower Fan Motor connector
P/J290
The resistance between P/J289 - 1 (RED) and - 3 (BLK) is approx. 3.95k Ohm. Yes No Unanswered
Replace the End Blower Fan Motor. (
PL 29.8)
Restore the machine to its original state. Disconnect the HCF PWB connector
P/J815. Measure the resistance at the connector side.
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