User's Manual

JUNI JF43-E1900/CFN03
CDMA FIBER FED REPEATER OPERATIONS MANUAL
Version 1.17 ⓒ J
uni America Inc. Page 69 of 88
cleaning and/or dusting.
6. Once maintenance is complete, return the Fan Control Unit back into its space
and tighten the multi-turn fasteners.
7. Plug the power cable back into the Fan Control Unit.
5.1.2 Remote Unit Fan Maintenance
1. The fan compartment is located at the top of the RU.
2. Turn off the fan at the fan controller.
3. To perform maintenance on the fan for the RU, turn the eye bolts at the top of the
RU a quarter turn to unlock the fan compartment and then slide it out of the RU.
The fan compartment has a draw stud which latches onto a predefined hole to
prevent the fan compartment from falling out.
4. Pull out the fan compartment firmly to release the stud from its hole. Do not pull
on it too hard as a 24V power cable is directly connected to the fan compartment.
5. There are two fans in the compartment which is required to be cleaned and
checked regularly to ensure proper operation of the fan and allow the fan to
perform its duty in cooling the RU.
6. At the completion of the maintenance, return the fan compartment by sliding it
back into its designated placement.
5.2 Fault Detection and Alarm Reporting
The JF43 FFR on board embedded software detects various unit and system faults
which generate either a Major or Minor alarm. A major alarm indicates that the
repeater has failed in a way that directly affects RF transport performance. When a
major alarm occurs, all RF functions are affected and will cause the system to be out
of service. A minor alarm means that the system performance is not affected, or in
some cases, that the performance may no longer be optical. When a minor alarm
occurs, RF functions continue and the system remains in service.