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  4. What should I do if my standby generator doesn’t crank or generator cranks and doesn’t run?

What should I do if my standby generator doesn’t crank or generator cranks and doesn’t run?

Step 1. Verify Generator Will Start and Run Manually
ATS MODELCOMMANDPASSFAIL
WINCO
ASCO165
ASCO185
Controller > manual mode > start commandGenerator starts & runs:
go to step 2
Generator does start & run:
repair symptom(s)

Step 2. Put Generator In Auto Mode
ATS MODELCOMMANDPASSFAIL
WINCO
ASCO165
ASCO185
Generator in Auto Mode > Jump Auto Start contacts to start in Auto ModeGenerator starts & runs:
Go to Step 3
Generator does start & run:
Repair symptom(s)

Step 3. Give Start Command From Transfer Switch
ATS MODELCOMMANDPASSFAIL
WINCOFlip toggle switch to start on the front paneGenerator starts & runsGenerator does not start & run: Troubleshoot the start switch continuity
ASCO165Press & hold the push to test button until the generator cranks & startsGenerator starts & runsGenerator does not start & run: Go to Step 4
ASCO185Press & hold the transfer test button for at least 15 secondsGenerator starts & runsGenerator does not start & run: Go to Step 4

Step 4. Start Command At Transfer Switch Fails

ATS MODELCOMMANDPASSFAIL
WINCOManually bypass the switch start command & verify generator starts > Jump the Start Signal (#23) & Battery Negative (#1) terminals on the switchGenerator starts & runs: Go to Step 5Generator does not start & run: Troubleshoot generator start circuit. Problem is in wiring between ATS and generator start contacts
ASCO165
2-Wire Switch
Manually send the start signal to the generator > Apply jumper to generator. Hold jumper for at least 20 seconds.
Closed on start Jump Terminal Block 7 terminals 4 and 5.
Open on start (not used w/Winco products) Terminal Block 7 terminals 5 and
Generator starts and runs: Go to Step 5Generator does not start and run: Troubleshoot generator start circuit. Problem is in wiring between the ATS and generator start contacts
ASCO165
4-Wire Switch
Got to Step 5
ASCO185Manually send start signal to generator > Apply jumper to generator. Hold jumper for at least 20 seconds.
Closed on start Jump Terminal Block 7 terminals 4 and 5
Generator starts and runs: Go to Step 5Generator does not start and run: Troubleshoot generator start circuit. Problem is in wiring between the ATS and generator start contacts

Step 5. Simulate Power Failure
ATS MODELCOMMANDPASSFAIL
WINCOInterrupt utility power to the transfer switch with the main switch in the Automatic position > ice cube relay should switch.
You should open continuity between Start and Bat – terminals
Proper continuity between Start & Battery – terminalsOpen continuity: Troubleshoot switch & relay wiring & function. Reset when finished
ASCO165
2-Wire Switch
Interrupt utility power to the transfer switch > start contact closed.
Closed on Start = Continuity between terminal block 7 terminals 4 and 5
Open on start (not used w/Winco products) = No Continuity between Terminal Block 7 terminals 5 and 6
Proper continuity, generator starts and runs: Go to Step 6Open continuity. If contact does not close when the utility available light goes out replace the ATS control board
ASCO165
4-Wire Switch
PART 1: Verify Voltages > Check voltage between Terminal Block 7 terminals 2(-) and terminals 3, 5 and 8 down.

PART 2: Verify Crank and Run Signal > Interrupt utility/reset switch errors.
Should have continuity between Terminal Block 7 terminals 7 and 8. Crank cycle is 10 seconds on/10 seconds off for three attempts. Should have continuity between Terminal Block 7 terminals 7 and 8.
Part 1: 12-15VDC: Continue to Part 2

PART 2: Generator starts and runs: Go to Step 6.
PART 1: Not VDC: Check generator battery, fuses and connections between switch and generator

Part 2: No Run Signal and/or No Crank Signal: Replace ATS board.
ASCO185Interrupt utility power to the transfer switch > this should close start contact
Closed on Start = Continuity between terminal block 7 terminals 4 and 5
Open on start (not used w/Winco products) = No Continuity between Terminal Block 7 terminals 5 and 6
Proper continuity, generator starts and runs. Go to Step 6Open continuity. If contact does not close when the utility available light goes out replace the ATS control board

Step 6. Reset System
ATS MODELCOMMAND
WINCO
ASCO165
ASCO185
Place transfer switch and generator in Auto Mode

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