24. Troubleshooting

24.1 Trouble shooting by operators

Be sure all the magnet power supplies are working (8 for each klystron) by observing the magnet current meters. If any magnet is drawing no current, check to see whether its breaker has been tripped.

If resetting the breaker restores the current, note this in the log. If the current remains zero, do not operate the transmitter.

Be sure the IPA power is turned on (switch on the IPA rack in the transmitter room).

PA system, including low-level stages

If the orange HV Ready light does not turn on 15 minutes after turning the system on, check the interlock indicator lights ar the lower left-hand apron of the console. If a string of lights is off, the first unlit light indicates which circuit is not functioning properly.

If any circuit is shown faulty by the interlock indicator lights, check the lower four rows of indicators on the same panel apron for the circuit breakers. If a light is off here (except for the spares) the circuit is dead. It can be reset by going to the left-hand rear side of the console where a bank of circuit breakers can be seen. Reset any breakers you find tripped.

If the orange light HV Ready light is on, but, upon pushing the HV On button, the red light doesn't stay on, press the Reset button for two to five seconds and then press the HV On button again. If the trouble persists, the power supply safety shorting bars are at fault.

24.2 Advanced Troubleshooting

The following list is not complete, but provides a start for troubleshooting.

Heat Exchanger	Breaker off or open relay coil

Low Water	Check gauge in the 30 gal. tank on the wall above the heat exchanger pad. If the water level is correct, depress the Emergency Off switch and restart the transmitter.

Kly A and/or b Collector Flow

Mag. Flow, Dummy and Waster Load Flow	Check the meter gauges in the water manifold. Check the hoses. Check for clogged filter at the pump house.

Temperatures: Magnet, Collector Body,

Tuner	Check for broken hoses, low flow

4160 phase failure (via relay K67)	Blown 1/4A fuses (F10,11,12) on Oil Ckt. Bkr. cabinet inside HV room, right-hand side of entrance door. Watch for 208 V at this place. Fuses are inside red pull-out handle.

Kly A or B reflected power	Push Reset on reflected power alarm chassis in console.

Magnet Current	Check 16 circuit breakers.

Kly A or B Tuner Cooling Air	Wait about two minutes when turning on for compressor to reach operating pressure. Check gauge at apron of klystron tank. This should read about 20 lbs.

Crowbar fired	Press PA Reset

Crowbar On	Check circuit breaker

Beam Supply meters	Check beam voltage, collector current, body current, or beam current meters. Press PA Reset to unlock. Then check modulator waveform on scope.

HV Vault Door	Turn console key

Capacitor Fault	Press PA Reset. If fault persists, check meter located at lower beam holding capacitor in HV room, in front of the entrance door.

Beam Supply fault current	Press PA Reset, check modulator waveform.

Ind(uctrol) Zero Set	Wait two minutes after momentary shut down. Comes on as soon as Inductrol runs down to zero setting.

No RF output	Check high reflected power alarm indicators, press RESET button on reflected power alarm chassis. Press PA Reset.