2. Test for utility source line-to-line voltage across TerminalLugs N1 and N2 (see Figure 1). Normal utility sourcevoltage should be indicated.RESULTS:1. If low or no voltage is indicated, find the cause of theproblem and correct.2. If normal utility source voltage is indicated, refer toFlow Chart.teSt 40 – check Battery charGerSupply VoltaGe“pre-Wire load center”DISCUSSION:The battery charger is supplied with 120 VAC. Theoutput 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 bemeasured.a. If 240 VAC is not measured, verify load sourcevoltage.b. If 240 VAC is measured go to Step 3.3. Measure across points A and C. 240 VAC should bemeasured.a. If 240 VAC is not measured, repair or replaceWire T1.b. If 240VAC is measured, proceed to Step 4.4. Measure across points A and D. 240 VAC should bemeasured.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 wireis connected at point E. If good, replace batterycharger, then retest.b. If 120VAC is measured, refer to Flow Chart.teSt 41 – check Battery charGeroutput 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.PROCEDURE:Refer to Figure 11.1. Set VOM to measure DC voltage.2. Remove Wire 0 and Wire 15B from transfer switchterminal 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 minutesand 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 removedin Step 2.5. Measure across points H and I. 13.4 VDC shouldbe measured.a. If 13.4 VDC is not measured, replace thebattery chargerb. If 13.4 VDC is measured, the charger is working.*note: Battery charger voltage will be higher thanbattery supply voltage.teSt 42 – check Wire 0 and Wire15B“pre-Wire load center”DISCUSSION:In order for the battery charger to function, battery supplyvoltage 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 terminalstrips, 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 bemeasured.a. If 12 VDC is measured, repair or replace Wire0 between the generator terminal strip and theground 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 disconnectedWire 0 and Wire 15B. Approximately 115 Ohms shouldbe measured.Part 3 TRANSFER SWITCHsEctioN 3.4DiaGNostic tEstsPage 860G9266revA.indd 86 10/15/2008 11:27:35 AM
