Jaycar Electronics MP5212, Руководство пользователя

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Rack mount Series UPS
(
1~3kVA
)
User ‘s Manual
-22-
After working for a certain period, with normal input display, the buzzer gives
intermittent buzzing and displays battery low-voltage simultaneously. Cause:
too-low power grid voltage makes the UPS work under battery feed status.
When the battery runs low and low-voltage occurs, it enters into protection
status.
Problem 7
UPS is started and working. When power supply breaks down, UPS fails to
output power.
Cause: the battery unit is not connected to main unit or is severely damaged.
4.7 Troubleshooting
4.7.1 Overview
In the case of device failure, first of all, find out any obvious damage and try to
determine what causes the failure: device problem or external environment
(such as temperature, humidity and load). Always check these external factors
before coming to the conclusion of UPS system damage.
4.7.2 Troubleshooting
Only some simple troubleshooting suggestions are provided here. If the
diagnosis result is not certain or the information given here is not sufficient for
problem-solving, please turn to your local office or distributor for repair.
1
．
Buzzer gives long buzzing, trouble light is on, UPS is powered through
bypass, and inverter fails.
Possible causes: (1) Output overload or short circuit results in UPS automatic
shutdown protection.
(2) Driving or power tube malfunction.
(3) Master control board failure.
(4) UPS Over-temperature protection
2 ． UPS works properly when power supply is O.K., but it fails to function during
power failure.
Possible causes: (1) Battery failure.
(2) Battery charger malfunction: failing to charge battery
when power supply is O.K.