User's Manual

Page 314 FlexWave Prism Host, Remote and EMS 5.1 System Reference

A.1 HOST FAN REPLACEMENT PROCEDURE

Continuous airflow for cooling is provided by a fan assembly mounted on the left side

of the Host housing. The cooling fans blow cool air into the enclosure. Heated air is

exhausted through the vent openings on the right side of the enclosure. An alarm is

generated if a high temperature condition (>90º C/122º F) occurs. The fan assembly

may be field-replaced if either fan fails. Replacement of fan assembly does not

require that the Host be turned off.

Recommendation:: The replacement interval for the Host fan is 60 months.

Use the following procedure to remove and replace the Host cooling fans:

11 Notify the NOC or alarm monitoring system operator that the fan is being

replaced.

22 Loosen the two thumb screws that secure the fan/grill assembly to the front of

the Host enclosure.

33 Carefully withdraw the fan/grill assembly from the enclosure.

44 Slide the new fan assembly into the Host chassis until it is firmly seated.

55 Secure the fan/grill assembly to the front of the enclosure using the two screws

loosened in Step 2.

66 Verify that the fans run properly following power-up.

77 Notify the NOC or alarm monitoring system operator that the fans are back in

operation.

Electronic components can be damaged by static electrical discharge. To prevent ESD

damage, slip on a

n Electrostatic Discharge (ESD) wrist strap and connect the ground wire

to an earth ground source. We

ar the ESD wrist strap while completing each step in this

procedure.

22396-A

FAN

ASSEMBLY

THUMB

SCREWS