Troubleshooting
6| Symptom | Cause | Remedy |
|---|---|---|
| Will not retransfer to utility source upon restoration | A test mode has been activated. Utility voltage is outside the preprogrammed limits (check utility source for adequate voltage). A loose control connection. Faulty limit switch contact in the ATS motor circuit. Defective ATS motor. Defective TSC 80/TSC 80e controller (verify output signals with circuit board-mounted diagnostic LEDs). | |
| Will not transfer to generator source upon failure of utility source | Generator set not producing enough voltage/frequency or output circuit power switching device open. Warmup time delay function has not timed out (verify TSC 80/TSC 80e timer setting). | |
| Transfer to generator source without a power failure in the utility source | A loose control connection. Faulty limit switch contact in the ATS motor circuit. Defective ATS motor. Defective TSC 80/TSC 80e controller (verify output signals with circuit board-mounted diagnostic LEDs). | |
| Generator does not start or stop when it should | Verify remote engine control panel is set for automatic mode. Verify the FTS4 selector is not in the off, engine start, or test positions. | |
| No time delay when there should be | Verify time delay function setting of TSC 80/TSC 80e controller. Verify load bus voltage decay during transfer to enable neutral delay timer. | |
| Power is not available at the load terminals but the utility or generator power switching device appears to be closed to a live source | The power switching device’s trip unit (service entrance type ATS) has tripped on a fault on the system. Correct the fault. |
Symptom → cause → remedy extracted from this unit’s service/owner documentation; verify against the official manual before servicing.
About
Kohler TSC 80 — transfer switch. Specifications and parts compiled from manufacturer documents.