Verifying Fan-Module Operation; Figure 2-11 Cooling Unit Module And Cooling Unit Failure Indicator - Hatteras HN4000 Hardware Installation Manual

Step 4. If the HN4000 is not operating:
a. Verify that the assigned breaker in the breaker panel is in the ON position or the
b. Verify that the power connector to the HN4000 is seated properly.
c. Verify that the HN4000 is receiving ‐48 VDC power of the proper polarity.
When removing power from the device, ensure that both power connections (A and B) are
removed.
Caution
End of Procedure
2.8

Verifying Fan-Module Operation

After the HN4000 powers up, verify that Cooling Unit Fail LED is "off," indicating that the fan
module is operating. Figure

Figure 2-11 Cooling Unit Module and Cooling Unit Failure Indicator

Do not operate an HN4000 for more than two minutes without its fan-module operating.
Caution
End of Procedure
920550-5020 Rev 14
assigned fuse in the fuse panel is working properly.
2‐11 shows the LED's location.
Verifying Fan-Module Operation
HN4000 Hardware Installation Guide
2-11