Emergency Dispose For System Fault - AEG IST7 User Manual

IST Series UPS (10kVA-200kVA)
User Manual
NO Abnormal phenomena
7 When there is mains,
the
normally, when there is
no mains, the UPS is
with no output.
8 Buzzer
DC/AC indicator on, the
UPS turns to bypass to
supply power.
9 There is mains, but
buzzer
intermittently.
10 At mains status, the
UPS works normally,
once power outage, the
UPS works normally
but load system halt.
11 FAULT indicator of a
power unit is on.

6.4.2 Emergency Dispose for System Fault

 How to deal with the system fault in emergency
When system fault, shut down the power supply of UPS by the touch screen, if necessary,
close the user load and disconnect the input and output breaker of the UPS to avoid further
damage for the UPS. Inform the engineering technicist to maintain.
 How to deal with the fault of single power unit in emergency
When some power unit fault, it will be insulated with system automatically, and generally, it
will not influence the system normal operation, but it will decrease the redundancy degree of
Possible reason
1. Battery fault or the battery group is serious damaged.
UPS output
2. Charger fault. The battery cannot be charged and
3. Battery wire is not well connected or the contact of wire
4. Battery breaker is not closed.
5. After serious overload of UPS, the UPS is not restarted,
long beeps, See the fault information on touch screen.
The voltage or frequency of mains exceed the allowable
beeps range of the UPS.
The grounding is not so good and the float voltage between
neutral wire and grounding wire is too large.
The power unit is fault, replace it in time.
causes battery energy insufficient.
terminal is not good.
which causes the UPS stay in bypass output status.
6 Maintenance and Troubleshooting
85