Step 1. Check For Time Delays
| ATS MODEL | COMMAND | PASS | FAIL |
|---|---|---|---|
| WINCO | Not applicable: Go to Step 2. | ||
| ASCO165 ASCO185 | Press the Push to Test button to bypass the delays | Switch transfers to the next source. Note: ASCO switches will not transfer to a dead source | The switch does not transfer after time delays are bypassed |
Step 2. Does the Switch Work Manually
| ATS MODEL | COMMAND | PASS | FAIL |
|---|---|---|---|
| WINCO | Test with all power removed from the switch > manually press in the utility and generator contactor. Verify that both cannot be engaged together | Move Feely, contacts continuity when engaged: Go to Step 3 | Contacts don’t move freely, both contacts can engage together, no continuity when engaged: Replace contactor |
| ASCO165 ASCO185 | Test with all power removed from the switch > manually rotate handle on the left side of the contactor. | The switch transfers easily and smoothly. Go to Step 3 | Switch cannot transfer or is very difficult to transfer. Replace contactor assembly |
Step 3. Check Solenoid
| ATS MODEL | COMMAND | PASS | FAIL |
|---|---|---|---|
| WINCO | Not applicable: Go to step 4. | ||
| ASCO165 ASCO185 | Test with all power removed from switch > measure resistance of the solenoid | 35-70 Ohms: Go to Step 4 | Open/Out of pass range: Replace solenoid |
Step 4. Check Activation Signal
| ATS MODEL | COMMAND | PASS | FAIL |
|---|---|---|---|
| WINCO | Create a condition where the contactor should transfer. Monitor for AC voltage | 120 VAC. Replace contactor | No Voltage/Low Voltage. Replace switch, relay, auxiliary contact or harness |
| ASCO165 ASCO185 | Disconnect solenoid leads. Create condition where it should transfer and monitor for DC voltage | +/- 200VDC: Replace coil | No Voltage/Low Voltage: Replace Board |