Generac Power Systems 14 kW LP, 10 kW LP, 13 kW NG, 7 kW NG, 9 kW NG Test 40 Check Battery Charger

Section 3.4

Diagnostic tests

Part 3

Transfer switch

2.Test for utility source line-to-line voltage across Terminal Lugs N1 and N2 (see Figure 1). Normal utility source voltage should be indicated.

RESULTS:

1.If low or no voltage is indicated, find the cause of the problem and correct.

2.If normal utility source voltage is indicated, refer to Flow Chart.

Test 40 – CHECK BATTERY CHARGER

SUPPLY VOLTAGE

“pre-wire load center”

DISCUSSION:

The battery charger is supplied with 120 VAC. The output of the battery charger is 13.4 VDC / 2.5A.

PROCEDURE:

Refer to Figure 11.

1.Set VOM to measure AC voltage.

2.Measure across points A and B. 240 VAC should be measured.

a.If 240 VAC is not measured, verify load source voltage.

b.If 240 VAC is measured go to Step 3.

3.Measure across points A and C. 240 VAC should be measured.

a.If 240 VAC is not measured, repair or replace Wire T1.

b.If 240VAC is measured, proceed to Step 4.

4.Measure across points A and D. 240 VAC should be measured.

a.If 240 VAC is not measured, replace fuse F3.

b.If 240VAC is measured, proceed to Step 5.

5.Remove Fuse F3. Measure across points D and C. 120 VAC should be measured.

a.If 120 VAC is not measured, verify neutral wire is connected at point E. If good, replace battery charger, then retest.

b.If 120VAC is measured, refer to Flow Chart.

TEST 41 – CHECK BATTERY CHARGER

OUTPUT VOLTAGE

“pre-wire load center”

DISCUSSION:

The battery charger is supplied with 120VAC. The out- put of the battery charger is 13.4 VDC / 2.5A.

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PROCEDURE:

Refer to Figure 11.

1.Set VOM to measure DC voltage.

2.Remove Wire 0 and Wire 15B from transfer switch terminal strip points F and G.

3.Measure across points H and I. Battery supply voltage (12 VDC) should be measured.

a.If battery voltage is not measured, wait 5 minutes and repeat Step 3.

b.If battery supply voltage is still not available, refer to Flow Chart.

c.If battery voltage is measured, proceed to Step 4.

4.Reconnect Wire 0 and Wire 15B previously removed in Step 2.

5.Measure across points H and I. 13.4 VDC should be measured.

a.If 13.4 VDC is not measured, replace the battery charger

b.If 13.4 VDC is measured, the charger is working.

*NOTE: Battery charger voltage will be higher than battery supply voltage.

TEST 42 – Check Wire 0 and Wire15B

“pre-wire load center”

DISCUSSION:

In order for the battery charger to function, battery supply voltage must be available to the battery charger.

PROCEDURE:

Refer to Figure 11.

1.Set VOM to measure DC voltage.

2.Disconnect Wire 0 and Wire 15B from generator terminal strips, locations J and K.

3.Wait five (5) minutes after removing wires.

4.Measure across points L and M on the terminal strip. 12 VDC should be measured.

a.If 12 VDC is measured, proceed to Step 6.

b.If 12 VDC is not measured, proceed to Step 5.

5.Measure across points M and N. 12 VDC should be measured.

a.If 12 VDC is measured, repair or replace Wire 0 between the generator terminal strip and the ground lug.

b.If 12 VDC is not measured, proceed to Step 8.

6.Set VOM to measure resistance.

7.Connect the meter test leads across the disconnected Wire 0 and Wire 15B. Approximately 115 Ohms should be measured.