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4-7 UPS internal fault
If the following conditions occur, the UPS fails. At this time the UPS will
transfer to ǏBYPASS modeǐ. The bypass LED and fault LED will light on
and alarm continuously. If utility is too low or too high the UPS output will be
disabled. For fault messages, please refer to the troubleshooting (section7)
of this manual.
- When the UPS inner component overheats, the UPS will protect itself by
thermo-switches. This status is so-called (“O.T.P”).
- When under (or over) voltage is happened in the UPS output. This kind of
fault will be detected by the microprocessor in the UPS and is so-called
“U.V.P” (“O.V.P”).
- When under (or over) bus voltage is happened in the UPS and is
so-called “Bus U.V.P” (“Bus O.V.P”).
4-9 Output U.V.P 4-10 Output O.V.P
4-11 DC BUS U.V.P 4-12 DC BUS O.V.P
4-8 Derating power
In the range of 80Vac to 175Vac, the UPS load capacity will decrease. This
function provides a wider operating power voltage range.
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