Bird Technologies 8890-320 Series - Manual (Page 25)

13
Chapter 6 Maintenance
This chapter covers cleaning, inspection, trouble-shooting, and specifications for the Bird 8890 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 blower assembly from supply voltage before performing any maintenance.
Problem Possible Cause Correction
No air flow from blowers;
“BLOWER ON” light off.
Unplugged power cable. Connect the power cable.
No AC power. Make sure AC power is properly connected and turned
on.
Fuse burnout. Replace fuse after correcting the burnout cause. See
“Replacing the Fuse” on page 16.
No air flow from blowers;
“BLOWER ON” light on.
Fan obstructed by bent grill. Straighten the grill.
Fan motors overheated. Clean the grill and fan blades. See “Cleaning the Load
Resistor” on page 14.
Fan motors burnt out. Replace the fan motors (See “Replacing the Fan” on
page 17).
Air flow from blowers;
“BLOWER ON” light off.
Lamp burnout. Replace lamp. See “Replacing the Indicator Light” on
page 16.
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 17.
High or low DC
resistance.
Loose RF input connector. Tighten connector.
Faulty RF input connector. Model 8890: Replace connector. See “Replacing the RF
Connector” on page 16.
All other models: Return the unit for service.
Faulty resistor. Replace the resistor. See “Replacing the Load Resistor”
on page 17.
Overheating radiator. RF power too high. Lower RF power. See “Specifications” on page 20 for
maximum RF power.
Coolant level too low. Check the coolant level. Add coolant if necessary. See
“Inspecting the Coolant Level” on page 15.
Coolant degraded. Replace the coolant. See “Inspecting the Coolant Level”
on page 15.
Faulty control thermoswitch
(blower only).
Replace control thermoswitch. See “Installing the
Thermoswitch” on page 6.
Faulty resistor. Replace the resistor. See “Replacing the Load Resistor”
on page 17.