Bird Technologies 8920 Series - Manual (Page 21)

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Chapter 5 Maintenance
This chapter covers cleaning, inspection, trouble-shooting, and specifications for the Bird 8920 series loads.
Troubleshooting
The table below contains troubleshooting information for problems which can occur during normal operation. This
manual cannot list all malfunctions that may occur, or their corrective actions. If a problem is not listed or is not cor-
rected by the listed actions, notify a qualified service center.
WARNING
Never attempt to connect or disconnect RF equipment from the transmission line while RF power is being
applied. Leaking RF energy is a potential health hazard.
WARNING
Disconnect the unit from all power sources before servicing.
The unit may be energized from multiple sources.
The potential for electric shock exists.
WARNING
Oil is slippery. If a leak occurs, be careful not to fall.
Problem Possible Cause Correction
Leaking coolant Loose clamping band Tighten the clamping band
Defective or improperly installed
O-ring Replace the O-ring
(See “Load Resistor” on page 14)
High or low DC
resistance Loose RF input connector Tighten connector
Faulty RF input connector Model 8921: Replace connector
(See “RF Connector” on page 13)
All other models: Return the unit for service
Faulty resistor Replace the resistor
(See “Load Resistor” on page 14)
Overheating radiator RF power too high Lower RF power
Coolant level too low Check the coolant level. Add coolant if necessary
(See “Coolant Level” on page 13)
Coolant degraded Replace the coolant
(See “Coolant Level” on page 13)
Faulty resistor Replace the resistor
(See “Load Resistor” on page 14)