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Uninterruptible Power Supply Faults

UNINTERRUPTIBLE POWER SUPPLY – FAULTS
Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. Including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage of each battery may show 13 volts when tested with a multi-meter. This is a float voltage and a true indication of the battery voltage and its condition requires each battery to be tested under a load. If one battery is faulty in a set of batteries it will causes the whole battery system to fail and indicate a battery fault.
Also a faulty charging circuit will not charge the batteries and will cause a fault condition warning.

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my ups is not working


Batteries in the UPS will last 3 to 5 years and it depends upon several factors. including the number of times the unit must go on battery power and environmental conditions. Solution : replace the batteries

Nov 26, 2010 | APC Back-UPS CS 500VA UPS System

1 Answer

u p s by pass l e d flashing light


Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. Including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. If one battery is faulty in a set of batteries it will causes the whole battery system to fail and indicate a battery fault.
A faulty charging circuit will not charge the batteries and will also cause a fault condition.

Nov 29, 2009 | Liebert (PS2200RT2230) UPS System

1 Answer

when ups is on it willgo to falt mode we have conected in tv


I assue you connected the UPS to a TV to test the UPS unit.

Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. If one battery in a set of batteries that is faulty and causes the whole battery system to fail and indicate a battery fault. A faulty charging circuit will not charge batteries and will cause a fault condition.

These lower powered and cheaper type UPS are switch over types, when the mains supply fail, the UPS switches over to the battery and inverter in milli-seconds which then supplies mains power. A faulty inverter circuit and or flat batteries won’t deliver standby power when the mains supply fails.

Nov 18, 2009 | Battery Basics Computers & Internet

1 Answer

hi in my apc es 500 the amber and green light is alternatively flashing and my ups is not working on battery power it is shutting down automatically plz help


Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. There maybe one battery in a set of batteries that is faulty and causes the whole battery system to fail and indicate a battery fault.

These lower powered and cheaper type UPS are switch over types, when the mains supply fail, the UPS switches over to the battery and inverter in milli-seconds which then supplies mains power. A faulty inverter circuit and or flat batteries won’t deliver standby power when the mains supply fails.

Nov 12, 2009 | APC Computers & Internet

2 Answers

my ups is not working. it is not responding on main power supply neither backing up.


Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. There maybe one battery in a set of batteries that is faulty and causes the whole battery system to fail and indicate a battery fault.

These lower powered and cheaper KVA type UPS are switch over types, when the mains supply fail, the UPS switches over to the battery and inverter in milli-seconds which then supplies mains power but the power waveform is a pseudo sine wave (ie not a true sinewave. A faulty inverter circuit and or flat batteries won’t deliver standby power when the mains supply fails.

Nov 07, 2009 | APC Back-UPS CS 500VA UPS System

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