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Troubleshooting for MV ACTS
!DANGER
Refer to the Group 5 Controller User’s Guide
Hazardous voltage capable of causing shock, burns, or death is used in the switch. Do not touch the power or load terminal of the transfer switch!
Problem | Check in Numerical Sequence |
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1 Operation | 2 | 3 Voltage on | ||
| Display | |||
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| Starting control must be in |
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Hold Transfer Test switch 15 | the automatic position. |
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Batteries must be charged |
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when the Transfer | seconds or the outage must be | and connected. Check |
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Control switch is turned | long enough to allow for | wiring to engine starting |
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and held in Transfer Test | Feature 1C time delay plus | contacts on customer |
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position or when the | engine cranking and starting | terminal block TB. Verify on |
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normal source fails. | time. | the controller that small |
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| plug J3 is connected to |
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| receptacle P3. |
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| Emergency | |
Transfer switch does not |
| Generator output circuit | voltage on | |
transfer the load to the | Wait for Feature 2B time delay | breaker must be closed. | controller display | |
emergency source after | Generator frequency must | should read at | ||
to time out (if used). | ||||
the | be at least 95% of nominal | least 90% of | ||
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starts. |
| (57 Hz for a 60 Hz system.) | nominal phase to | |
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| phase voltage. | |
Transfer switch does not |
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| Normal voltage on | |
transfer the load to |
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| controller display | |
normal source when | Wait for Feature 3A time delay |
| should read at | |
normal returns or when | to time out (if used). |
| least 90% of | |
the Transfer Control |
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| nominal phase to | |
switch is released. |
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| phase voltage. | |
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does not stop after load | Wait for Feature 2E time delay | Starting control must be in |
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retransfer to the normal | to time out (if used). | the automatic position. |
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source. |
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Failure to Synchronize | Conditions of normal or emergency | sources not suitable for closed transition | ||
light comes on. | transfer. Recheck voltage and frequency of both sources. Press Alarm Reset. | |||
Extended Parallel Time | CBN and CBE contacts are closed longer than setting in the controller. Open the | |||
light comes on. | disconnected source CB, then call ASI for assistance. |
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TS Locked Out light | Transfer lockout operation has occurred; transfer switch is disabled from automatic | |||
comes on. | operation. Open the disconnected source circuit breaker, then call ASI. | |||
Circuit breaker trips (on | Check the controller display for error messages and determine the cause of the | |||
trip. After the fault is cleared, turn the Breaker Control switch to CLOSE. Press | ||||
an ATS without protective | ||||
the Alarm Reset button. |
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relay) |
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The CB should close. |
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Circuit breaker trips (on | Check the protective relay and determine the cause of the trip (refer to device’s | |||
instructions). After fault is cleared, reset the protective relay. Then reset the Lock- | ||||
an ATS with a protective | Out Relay by turning it to RESET. Next turn the Breaker Control switch to | |||
relay) | CLOSE. Press the Alarm Reset button. |
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| The CB should close. |
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