02/02
64
6.2 LED Interpretation
The item number refers to the details shown in figure 6.1.
Item
No.
Normal
State
I n t e r p r e t a t i o n – a c t i o n
1.
ON
If this green LED is OFF it signifies a problem with the bypass input AC.
Check the following:
a. Bypass input power switch Q2 is closed.
b. Input supply voltage is within 10% nominal.
c. Power Supply fuses are OK-LS1, LS2 on the AC Power supply board will extinguish if either fuse is ruptured.
If the above checks prove unsatisfactory, then seek qualified assistance.
2.
OFF
If this green LED is OFF it that the inverter is not producing its correct voltage. Check the following:-
a. If [OVER TEMPERATURE] or [OVER LOAD] alarm messages are active, then (after allowing the UPS to cool /
checking that the load current on the bypass line is not excessive) press the reset switch (S1) on the UPS
logic board.
b. If the DC busbar is below 320V DC for 380 V AC systems, 330 V DC for 400 V AC system or 340V DC for a
415 AC system, then do the checks as per ‘Rectifier Blocks’ – Input failure items as per 15,16,17 & 18 in the
following table.
c. If the inverter works OK when mains is available but not now when mains is unavailable, then check the battery
power fuse F13.
If the above checks prove unsatisfactory, then seek qualified assistance.
3.
OFF
If this yellow LED is ON (flashing), it signifies that the load has been transferred to the Static Bypass supply. If this
is an automatic change over it will be accompanied by a fault warning on the display panel: take the appropriate
actions for the display indications (see Display alarm message table).
4.
OFF
If this yellow LED is on, it signifies that the battery is not available. This could be due either to the battery circuit
breaker being open or that the DC busbar voltage is below the figures stated (2) above.
The battery circuit breaker will open automatically if the DC voltage falls below these levels.
Check the following:
a. Battery circuit breaker is closed.
b. DC busbar voltage – if not above 320 V
then carry out
but you are unable to close the battery circuit breaker then seek qualified assistance.
c. If the battery circuit breaker trips as soon as mains power is disconnected then check the battery power fuse. (F
13)
5.
N/A
This is a bar graph indicating the % of the total load that is being applied to the system under normal running
conditions several of these LEDS would be ON.
6.
N/A
This is a bar graph indicating the battery charge state and would normally have four or five of the LEDs ON. When
the unit runs on battery, this bar graph changes to give an indication of the time remaining on battery as 2 minutes
per LED for 10 minutes of battery backup.
7.
OFF
If this yellow LED is on it signifies that the applied load has exceeded the maximum. It will be accompanied by all
five load bar graph LEDs being ON (Item 5), the alarm warning indication flashing RED (Item 9) and an
OVERLOAD message on the visual display. This will be accompanied by an audible warning. Reduce the load
immediately.
8.
OFF
If this yellow LED is on it signifies that the battery voltage is low and that the end of battery is near (normally two
minutes). This will be accompanied by an audible warning.
9.
OFF
This red LED will flash on and off and indicate that the UPS has detected a fault, it will be accompanied by a
message on the display panel, take the required actions for the display panel message (see Display Alarm
Message Table). This will be accompanied by an audible warning.
To Next Page
Loading...
Need help?
General