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| Chapter 7 | Troubleshooting |
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No.1 |
| Fault description |
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| Reason |
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| Actions to be taken |
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| Bypass voltage or frequency is out |
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15 |
| Bypass |
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| of normal range and inverter output |
| Check the bypass voltage and frequency |
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| unsynchronized |
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| is not synchronized with the bypass |
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| output. |
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| Bypass | voltage | or | frequency |
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16 |
| Bypass ratings exceed |
| exceeds the normal range and the |
| Check the bypass voltage and frequency |
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| the normal range |
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| bypass will not power the load |
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| anymore. |
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17 |
| Bypass SCR fails |
| Bypass SCR is damaged |
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| Notify the service dept for repairing |
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| Bypass over current |
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| If the over current time exceeds the |
| Check the load, if it is normal, then restart |
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18 |
| timeout |
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| limit, the UPS may shut down the |
| the UPS |
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| bypass and the inverter. |
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| Shutdown due to |
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| When the overload delay time is due |
| Repair the bypass and reduce the load, |
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19 |
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| in inverter mode, if at this time the |
| and then restart the UPS. Note: Don’t let |
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| bypass fault |
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| bypass has fault, then the inverter is |
| the UPS in over load state for a long time. |
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| shutdown. |
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| The battery life is reduced due to |
| Notify the service dept for replacing the |
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20 |
| Battery | needs to | be |
| aging, which may endanger the |
| battery and set the battery model and |
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| replaced |
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| normal operation of UPS. Warn the |
| parameters through software. |
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| user that the battery is abnormal and |
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| needs to be replaced. |
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21 |
| No battery |
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| Batteries are not connected. |
| Check | the | battery | and | the wiring of |
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| batteries |
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| The battery discharges to |
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22 |
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| point (the battery capacity is |
| Shut down the load in time |
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| battery discharging |
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| inadequate), the system may shut |
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| down after a few minutes |
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23 |
| battery over |
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| battery temperature is too high |
| Check | the | battery | temperature and |
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| temperature |
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| ventilation |
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24 |
| Battery | contactor | is |
| Battery contactor fails |
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| Notify the service dept for repairing |
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| abnormal |
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25 |
| battery | is |
| The battery condition for |
| Start the self test after the conditions can |
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| disabled |
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| not satisfied |
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| meet the requirements |
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26 |
| Battery | is connected |
| Battery is connected reverse |
| Notify the UPS service engineer to |
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| reverse |
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| connect the battery again |
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27 |
| Bypass phase rotation |
| Bypass phase rotation is reverse |
| Notify the UPS service engineer to |
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| is reverse |
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| change the bypass phase rotation |
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28 |
| Rectifier fails |
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| Rectifier | is abnormal | and has |
| Notify the service dept for repairing |
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| serious fault |
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29 |
| Rectifier heatsink over |
| Rectifier heatsink temperature is too |
| The UPS | can recover | automatically. |
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| temperature |
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| high |
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| Check the environment and ventilation |
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