Troubleshooting
Alarm Reason CodesSome alarms have a reason code as well as the alarm code. These reason codes may help you to interpret and isolate the cause of an alarm. Table 20 contains a listing of all reason codes along with the associated alarm codes. It also gives an interpretation of the reason, and a suggested corrective action.
Table 20. Alarm Reason Codes
Alarm Code and | What it Means | What to Do |
Reason Code |
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M Check Battery | A battery (pair of modules) has failed |
Open Cell | an open cell test. |
(Reason code 4) |
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Look in the alarm log for the slot number of the failed modules. Verify that both battery modules are properly installed. If properly installed, replace both battery modules.
M Check Battery | The system batteries have degraded | Replace all battery modules. |
Weak Battery | to the point where system runtime is |
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(Reason code 5) | less than the designed rating. |
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T Call Service | The UPS has detected the input | Correct the input wiring problem and restart the UPS. |
Phase Error | phase rotation to be incompatible |
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(Reason code 6) | with its output wiring and will not |
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| start up. |
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T Call Service | A power module has detected an |
Module Failure | internal fault and has shut down. |
(Reason code 7) |
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Look in the alarm log for the slot number of the power module and replace the defective module.
T Call Service Excessive Transfers (Reason code 8)
The UPS has detected an excessively Contact your service representative. high number of automatic transfers
from High Efficiency mode, and has switched to Double Conversion (Auto) mode.
T Call Service | A power module has detected an | Look in the alarm log for the slot number of the affected |
Precharge Failure | initialization sequence problem and | module. Contact your service representative. |
(Reason code 9) | will not start up. |
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U Low Redundancy | The UPS load exceeds 2800 watts per | Reduce the load or install additional battery modules (two |
Insufficient Batteries | battery string. The system will protect | modules per string). |
(Reason code 10) | the load during short power outages, |
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| but battery degradation or damage |
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| may result. |
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U Low Redundancy Insufficient Modules (Reason code 11)
The number of active power modules Reduce the load or install additional power modules. is too few to provide the programmed
redundancy level while protecting the load. The UPS will protect the load, but will not be fault tolerant.
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