Troubleshooting – Status and Alarm Messages
Display Message | Meaning | Corrective Action |
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Int. Mech. Bypass | The internal mechanical switchgear is | No corrective action is necessary. |
Switch Open. | open. |
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The UPS is in battery operation and | Shut down the system and the load | |
| the battery charge is low. | equipment or restore incoming volt- |
| Note: Runtime is limited in duration. | age. |
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Load Is No Longer | The load previously exceeded the | No corrective action is necessary. |
Above Alarm Threshold. | alarm threshold and the situation has |
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| been corrected either because the load |
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| decreased or the threshold was |
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| increased. |
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Load Power Is Above | The load has exceeded the user- | Option 1: Use the display interface to |
Alarm Threshold. | specified load alarm threshold. | raise the alarm threshold. |
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| Option 2: Reduce the load. |
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Parallel Redundancy | The load has exceeded the user | Option 1: Use the display interface to |
Below Alarm Threshold. | specified load alarm threshold. | raise the alarm threshold. |
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| Option 2: Reduce the load. |
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| Parallel redundancy is now restored. |
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Mains Not Available. | The frequency or voltage is out of | Correct the input voltage to provide |
Input Freq/Volt Out of | acceptable range for normal | acceptable voltage or frequency. |
Range. | operation. |
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Min Runtime Restored. | The system runtime dropped below | No corrective action is necessary. |
| the configured minimum and has |
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| been restored. Additional Battery |
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| Modules were installed, the existing |
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| Battery Modules were recharged, the |
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| load was reduced, or the threshold |
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| was decreased. |
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No Batteries Are | No battery power is available. | Check that the batteries are inserted |
Connected. |
| properly. |
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No Master is Present in | No parallel master is present. The | Contact APC. |
the Parallel System. | parallel system will not be able to |
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| function properly. |
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Number of Battery | One or more battery modules were | No corrective action is necessary. |
Modules Decreased. | removed. |
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Number of Battery | One or more battery modules were | No corrective action is necessary. |
Modules Increased. | added. |
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Overload on a Parallel | One or more systems has overload. | No corrective action is necessary. |
Unit. | Note that the entire parallel system |
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| will not be able to return from bypass. |
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PBus Communication | Communication fault detected on the | Check PBus 1 or PBus 2 wiring. |
Fault on Cable 1. | PBus 1 or PBus 2. | If this does not help contact APC. |
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