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Denise HudsonSep 7, 2025
What causes a Boost failure on a WÄRTSILÄ UPS?
- MMichelle HowellSep 7, 2025
If the WÄRTSILÄ UPS displays 'Boost failure', it indicates a hardware problem. Replace the inverter.
What causes a Boost failure on a WÄRTSILÄ UPS?
If the WÄRTSILÄ UPS displays 'Boost failure', it indicates a hardware problem. Replace the inverter.
What does Bus B not present mean on my WÄRTSILÄ UPS?
If the WÄRTSILÄ UPS displays 'Bus B not present', verify the module is properly inserted. Check bus B connection and bus B present connection. Replace the module if necessary.
What does Bus A not present mean on my WÄRTSILÄ UPS?
If the WÄRTSILÄ UPS displays 'Bus A not present', verify the module is properly inserted. Check bus A connection and bus A present connection. Replace the module if necessary.
What does FAILURE mean on my WÄRTSILÄ UPS?
If the WÄRTSILÄ UPS indicates 'FAILURE' due to temperature, watchdog, or EMC, replace the T4S.
Why is my WÄRTSILÄ UPS showing a Derating Temperature?
If the WÄRTSILÄ UPS temperature is too high, the available output power is reduced. Check the temperature inside the inverter and the room temperature. You may need to replace the fan or the inverter.
What to do if WÄRTSILÄ UPS shows LOG NEARLY FULL?
If the WÄRTSILÄ UPS shows 'LOG NEARLY FULL', the log file must be cleared.
Why is my WÄRTSILÄ UPS showing Boost not ready?
If the WÄRTSILÄ UPS displays 'Boost not ready', it can be because it is less than 5 minutes after the previous boost action, or the AC_IN frequency or voltage is different from AC_OUT. Wait 5 minutes to recover the situation. Check the input/output cables.
What to do if WÄRTSILÄ UPS displays Freq ACin Too low?
If the WÄRTSILÄ UPS shows 'Freq ACin Too low', check the grid frequency.
What to do if WÄRTSILÄ UPS displays Freq ACin Too High?
If the WÄRTSILÄ UPS shows 'Freq ACin Too High', check the grid frequency.
What does Bus Not Present mean on my WÄRTSILÄ UPS?
If the WÄRTSILÄ UPS displays 'Bus Not Present', it means there is a bus present connection missing in one cabinet. Check if the module is properly inserted, check the bus present connection, and check the bus connection. Replace the module if necessary.
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