Guardian Technologies 4389, 4456 TEST 4- FIXED EXCITATION TEST ROTOR AMP DRAW TEST, Section, Part

AC GENERATORS PART 2

TEST 4- FIXED EXCITATION TEST

/ROTOR AMP DRAW TEST

DISCUSSION:

Supplying a fixed DC current to the rotor will induce a magnetic field in the rotor. With the generator running, this should create a proportional voltage output from the stator windings.

PROCEDURE:

1.Disconnect Wire 4 from the voltage regulator, 3rd terminal from the top. See Figure 3.

2.Connect a jumper wire to the disconnected Wire 4 and to the 12 volt fused battery supply Wire 15. (located at 15A fuse).

Figure 3. Voltage Regulator

3.Set VOM to AC volts.

4.Disconnect Wire 2 from the excitation circuit breaker (CB2) and connect one meter test lead to that wire. Disconnect Wire 6 from the voltage regulator and connect the other meter test lead to that wire. (5th terminal from top, double check wire number).

5.Set the AUTO-OFF-MANUAL switch to MANUAL. Once the engine starts, record the AC voltage.

6.Set the AUTO-OFF-MANUAL switch to OFF. Reconnect Wire 2 and Wire 6.

7.Disconnect Wire 11 from the voltage regulator and connect one meter test lead to that wire. Disconnect Wire 22 from the voltage regulator and connect the other meter test lead to that wire (both wires are located at the top two terminals of the voltage regulator, see Figure 3).

SECTION 2.4

DIAGNOSTIC TESTS

H

Below 60 VAC

Below 60 VAC

0.91-1.06A

0.80A

0.64A

0.71-0.82A

Above 1.5A

Above 1.3A

Above 1.1A

Above 1.3A

Test 10

Above 60 VAC

Above 60 VAC

Zero

Current

Draw

Zero

Current

Draw

Test 8

G

“Problem 1”

DRAW TEST

PAGE 2.3-1 & 2.3-2

F

Below 60 VAC

Below 60 VAC

0.91-1.06A

0.80A

0.64A

0.71-0.82A

0.91-1.06A

0.80A

0.64A

0.71-0.82A

Test 7

TEST 4 RESULTS - FIXED EXCITATION TEST/ROTOR AMP

ABCDE

Below 60 VAC

Below 60 VAC

Above 1.5A

Above 1.3A

Above 1.1A

Above 1.3A

Above 1.5A

Above 1.3A

Above 1.1A

Above 1.3A

Test 5Test 7Test 7Test 8Test 10

MATCH RESULTS WITH LETTER AND REFER TO FLOW CHART ON

Zero or

Residual Volts

Zero or

Residual Volts

Zero

Current

Draw

Zero

Current

Draw

Below 60 VAC

Above 60 VAC

0.91-1.06A

0.80A

0.64A

0.71-0.82A

0.91-1.06A

0.80A

0.64A

0.71-0.82A

Above 60 VAC

Below 60 VAC

0.91-1.06A

0.80A

0.64A

0.71-0.82A

0.91-1.06A

0.80A

0.64A

0.71-0.82A

Above 60 VAC

Above 60 VAC

0.91-1.06A

0.80A

0.64A

0.71-0.82A

0.91-1.06A

0.80A

0.64A

0.71-0.82A

(Model #)

ALL

ALL

4389-4758-4679

4456-4759

4390-4760

4692

4389-4758-4679

4456-4759

4390-4760

4692

Results:

Voltage Results

Wire 2 & 6

Voltage Results

Wire 11 & 22

Static Rotor

Amp Draw

Running Rotor

Amp Draw

GO TO

Page 2.4-3