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4.2.3 Switching the UPS from a Normal Operation to Maintenance Bypass Condition
1.
Enter COMMANDS menu by using UP and DOWN buttons on front panel during normal operation. Select
ENTER<BYPASS> command by using again the UP and DOWN buttons and pres ENTER button. The critical
load is transferred to bypass supply in this case and it is shown at LCD display with
“A09 MANUAL BYPASS”
message. Besides L6 (load on UPS) light on front panel will be off and L2 light (bypass) will be on.
2.
Turn on S3 (Maintenance Bypass) switch (after unlocking and taking away the padlock on it) to ‘’1’’
position.
3.
Turn off S7, S5, S1, S2 and S4 switches (to ‘’0’’ position).
In this case, bypass voltage is connected directly to the output of UPS and the critical load is supplied via
maintenance bypass switch. No AC or DC supply is connected to the inside and the circuits of UPS.
4.2.4 Switching the UPS from a Maintenance Bypass Condition to Normal Operation
1.
Turn on S1 (AC Input) switch (to ‘’1’’ position).
2.
Turn on S2 (Bypass) switch (to ‘’1’’ position).
3.
Turn on S4 (AC Output) switch (to ‘’1’’ position).
4.
Turn on S7 (On/Off) switch (to ‘’1’’ position). LCD panel activates, and main menu will appear at the
display. Also
“A08 ON MAINTENANCE”
message shown and the inverter will not start yet.
5.
Turn off S3 (Maintenance Bypass) switch (to ‘’0’’ position). Inverter will start automatically following the
turning off of S3 switch.
6.
Connect the batteries by turning on S5 (Battery) switch (to ‘’1” position).
Now UPS is ready for uninterruptable operation.
When the mains voltage is not available
" R02 LINE FAILURE "
message appears on LCD display. Sound
warning on and off is heard at the same time. UPS continues to supply the critical loads by converting the battery
voltage to AC voltage and provides operation without data losses or any other fault. Battery autonomy time may be
prolonged by shutting down the unnecessary loads for that moment.
But do not turn on these loads again during battery operation.
After a short period of time when the line voltage is available again, UPS returns to normal operation automatically
and the alarm message on the display disappears.
Shut down the critical loads in a period of minimum possible autonomy time (depends on the Ah capacity, charge
status, age of the batteries, actual load percentage of UPS and the ambient temperature). Otherwise critical loads
will be out of power at the end of battery autonomy time.
“A26 BATTERY LOW”
message appears first on front panel display during battery operation if battery voltage
drops below a defined level.
“A10 BATTERY LOW SHUT”
message appears on front panel display when the battery voltage drops to the end
of discharge voltage and UPS shuts itself down. Critical loads will be out of electrical power.
If a reserved generator in the system and if it’s available, that will start to supply the necessary electrical power to
UPS input and batteries start to be charged immediately. By means of using UPS together with a immediately
available generator system, battery discharge time decreases and so they will be charged quickly after a mains
outage.
4.3 UPS Behavior During Mains Outage
