11
Chapter 5
Maintenance
This chapter covers cleaning, inspection, trouble-shooting, and specifications for the Bird 8860 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 “Replacing the Load Resistor” on page 14)
High or low dc
resistance
Loose RF connector
Tighten connector
Faulty RF input connector
Model 8860: Replace connector (See “Replacing
the RF Connector” on page 13)
All other models: Return the unit for service
Faulty resistor
Replace the resistor
(See “Replacing the 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 “Replacing the Load Resistor” on page 14)
