Troubleshooting
Table 10 | Troubleshooting (continued) |
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| Problem | Cause | Solution | |
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Fault and Bypass indicators and |
| UPS requires service. Contact Emerson | ||
diagnostic B indicator are | UPS internal DC bus overvoltage | |||
Channel Support. | ||||
illuminated |
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Fault and Bypass indicators and |
| UPS requires service. Contact Emerson | ||
diagnostic C indicator are | UPS DC/DC fault | |||
Channel Support | ||||
illuminated |
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Fault indicator and diagnostic D | UPS PFC (Power Factor Correction | UPS requires service. Contact Emerson | ||
indicator are illuminated | Circuit) fault | Channel Support | ||
Fault and Bypass indicators and |
| UPS requires service. Contact Emerson | ||
diagnostic E indicator are | UPS inverter fault | |||
Channel Support | ||||
illuminated |
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Fault indicator and diagnostic A |
| Replace batteries. Contact your local dealer, | ||
UPS failed the battery test | Emerson representative or Emerson Channel | |||
and C indicators are illuminated | ||||
| Support | |||
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| Your UPS has received a signal or command | |
Fault and Bypass indicators and |
| from the attached computer. If this was | ||
UPS shut down by a command from | inadvertent, ensure the communication cable | |||
diagnostic C and E indicators | ||||
the communications port(s) | used is correct for your system. For assistance, | |||
are illuminated | ||||
| contact your local dealer, Emerson | |||
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| representative or Emerson Channel Support | |
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| UPS Failure (Includes Dual Fan | Ensure fan is not blocked. If the fault is not | |
Fault indicator and diagnostic A | failure, single fan failure under certain | |||
removed, contact your local dealer, Emerson | ||||
and B indicators are illuminated | condition and Battery Charger | |||
representative or Emerson Channel Support | ||||
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| Failure) and continuous alarm | ||
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| UPS detected a |
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| reversal or a loss of proper grounding |
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| for UPS; continuous alarm and UPS |
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| will not start in standby status. This is |
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AC input indicator is flashing | active only when power is first | Contact a qualified electrician to verify site wiring | ||
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| applied to the input. Once the UPS is |
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| running, the AC input indictor will |
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| flash, unless the input wiring is |
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| correctly changed |
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| Check battery connections, completely power | |
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| Battery source is not available; | down and restart UPS. | |
Battery indicator is flashing | NOTE: If the battery circuit opens while the UPS | |||
continuous alarm | ||||
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| is running, it will be detected when the next | ||
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| battery test is performed | |
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| The AC input powers the PFC input and serves | |
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| Because the voltage or frequency is | as the bypass source. If the AC is present but | |
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| the voltage or frequency exceeds the acceptable | ||
Bypass indicator is flashing | outside acceptable limits, the bypass | |||
range for safe operation with a load, the bypass | ||||
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| is disabled | ||
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| will be disabled and this indicator will flash, | ||
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| indicating that the bypass is unavailable | |
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When reporting a UPS issue to Emerson, include the UPS model and serial number. These are on the top panel of the Liebert® GXT3™.
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