Generac Power Systems 5411, 5412, 5413 Test 8 - Check Brush Leads, 9. - Stator Power Winding Leads

Section 7

DIAGNOSTIC TESTS

AC POWER WINDING RESISTANCE * RV45 (Model 5410/5411)

ACROSS WIRES:	OHMS
11 & 22	0.396Ω
11S & 22S	0.396Ω
33 & 44	0.396Ω

AC POWER WINDING RESISTANCE * RV55 (Model 5412/5413)

ACROSS WIRES:	OHMS
11 & 22	0.28Ω − 0.32Ω
11S & 22S	0.28Ω − 0.32Ω
33 & 44	0.28Ω − 0.32Ω

AC POWER WINDING RESISTANCE * RV65 (Model 5414/5415)

ACROSS WIRES:	OHMS
11 & 22	0.209Ω − 0.242Ω
11S & 22S	0.209Ω − 0.242Ω
33 & 44	0.209Ω − 0.242Ω

*Resistance values In ohms at 20° C. (68° F.). Actual readings may vary depending on ambient temperature. A tolerance of plus or minus 5% is allowed.

8.Now, set the VOM to its “Rx1 K” or “Rx10,000” scale and zero the meter.

9.Connect the meter test leads across Stator lead 11 and frame ground. “Infinity” should be read.

10.Connect the meter test leads across Stator lead 33 and frame ground. The reading should be “Infinity”.

11.Connect the meter test leads across Stator leads Wire 11 and Wire 33. The reading should be “Infinity”.

12.Connect the meter test leads across Stator leads Wire 11 and Wire 2. The reading should be “Infinity”.

13.Connect the meter test leads across Stator leads Wire 33 and Wire 2. The reading should be “Infinity”.

RESULTS:

1.If the Stator passes all steps except Step 7, repair, re-connect or replace Sensing leads 11S and 22S.

2.Replace the Stator if it’s power windings fail the test. (Note Result No. 1).

3.If the Power Windings test good, perform the “Insulation Resistance Test” on Page 13.

						CB1
	CB2
	11	11S	22S	22	44	33
RED	BLACk

Figure 7-9. – Stator Power Winding Leads

Test 8 – Check Brush Leads

DISCUSSION:

In Test 4, if application of battery voltage to the Rotor did NOT result in an output of about one-half rated voltage, the brush leads could be one possible cause of the problem. This test will check Wires 4 and 0 for an open circuit condition.

PROCEDURE:

1.Set a VOM to its “Rx1” scale and zero the meter.

2.Disconnect Wire 4 from the Voltage Regulator and from the Rotor brush terminal.

3.Connect the VOM test leads across each end of the wire. The meter should read “Continuity”.

4.Disconnect Wire 0 from the Rotor Brush Terminal. Connect one meter test lead to Wire 0. Connect the other test lead to a clean frame ground. The meter should read “Continuity”.

RESULTS:

1.Repair, reconnect or replace any defective wire(s).

2.If wires check good, go to Test 9.

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