Step 1. Verify if Utility Available Light is On
| ATS MODEL | COMMAND | PASS | FAIL |
|---|---|---|---|
| WINCO | Not applicable | ||
| ASCO165 ASCO185 | Make sure utility power breaker is open | Utility available light is on: Go to ‘Will Not Transfer’ help topic troubleshooting steps | Utility available light is off. Ensure plug is tight into the board: Go to Step 2 |
Step 2. Verify Utility Voltage at Switch
| ATS MODEL | COMMAND | PASS | FAIL |
|---|---|---|---|
| WINCO ASCO165 ASCO185 | With utility power available > check L1-L2 voltage is 220-252 VAC on the primary source contactors of the transfer switch | 220-252 VAC: Go to Step 3 | Not 220-252 VAC: Get utility power to the transfer switch. The breaker may be off or the power is still out, wiring between utility and transfer switch |
Step 3. Check Switch Harness
| ATS MODEL | COMMAND | PASS | FAIL |
|---|---|---|---|
| WINCO | With utility power on > check for voltage on Utility contact A1 and N. | +/-120VAC: Replace utility contactor or coil | No Voltage: Trouble shoot harness/relay functions through the print. Once problem identified, restart test |
| ASCO165 | Turn off generator with switch in Alternate position. Check continuity from L1 to pin 3 and 12 on Plug 1. Check continuity from L5 to pin 4 and Pin 15 on Plug 1. Ensure plug is tight on board | Harness continuity: Replace Board | Poor connection/continuity: Troubleshoot harness and repair |
| ASCO185 | Turn off generator with switch in Alternate position. Check continuity from L1 to pin 5 and 16 on Plug 1. Check continuity from L5 to pin 4 and Pin 8 on Plug 1. Ensure plug is tight on board | Harness continuity: Go to Step 4 | Poor connection/continuity: Troubleshoot harness and repair |
Step 4. Check Switch Settings
| ATS MODEL | COMMAND | PASS | FAIL |
|---|---|---|---|
| WINCO ASCO165 | Not Applicable | ||
| ASCO185 | Turn off all power in the switch. Check the following settings: Switch 1 actuator 4 = Off (Down) 60 hz Switch 2 actuator 2 = On (Up) | Match: Replace Board | No Match: Adjust switches and restart at first step |