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Guardian Technologies 5209 User Manual

Page 40

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C.B.

20/30A

Figure 6-8. – 20/30 Amp Breaker Test Points

TEST 3 - TEST EXCITATION CIRCUIT bREAkER

PROCEDURE:
1. With the generator shut down for at least two minutes, locate

the Excitation Circuit Breaker in the control panel. Disconnect
wires from the breaker, to prevent interaction.

2. Set a volt meter to measure resistance.

3. Connect the VOM test probes across the circuit breaker termi-

nals. The meter should read CONTINUITY.

RESULTS:
1. If circuit breaker tests bad (meter reads “OPEN”) then proceed

to Test 4 and replace the breaker after completing Test 4.

2. If circuit breaker is good, go on to Test 4.

2

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Figure 6-9. - Testing Excitation Circuit Breaker

TEST 4 - FIXEd EXCITATION TEST/

ROTOR AMP dRAW

PROCEDURE:
*NOTE: If the generator is not producing AC

Power, loss of governor control may occur caus-

ing an overspeed or extremely high RPM condi-

tion. If this condition occurs manually control

throttle (60Hz /3600 RPM) to perform test.
1. Unplug the six pin connector at the Voltage Regulator.

2. Disconnect Wire 14 from the Resistor (R1).

3. Connect a jumper wire between the removed end of Wire 14

and Wire 4 where it is soldered at the Diode (D1). See Figure
6-10.

R1

D2

4

14

14

4

D2

4

14

WIRE 14

REMOVED

JUMPER LEAD

14

4

R1

Figure 6-10. – Jumper Lead From Wire 14 to Diode

4. Set voltmeter to measure AC voltage

5. Disconnect Wire 2 from the Excitation Circuit Breaker and con-

nect one meter test lead to it. Connect the other meter test lead
to Wire 6 located in the six pin connector previously removed
from the Voltage Regulator. Be careful not to damage the pin
connectors with the test leads. See Figure 6-11.

6. Set Idle control switch to OFF.

7. Start the generator.

8. Measure the output voltage across Wire 2 and Wire 6 and

record the results.

AC Voltage across Wires 2 and 6 = _____________

section 6
Diagnostic tests

Page 38

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