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SALICRU
8.2. PROCEDURE FOR SWITCHING BETWEEN
OPERATION MODES
8.2.1. Switching the UPS into Battery Mode from Normal
Mode
The UPS transfers to Battery model immediately after input cir-
cuit breaker disconnects from the Utility.
8.2.2. Switching the UPS into Bypass Mode from Normal
Mode
Two ways to transfer the UPS into Bypass mode from Normal
mode; (a) Enter the menu Operate, touch the icon “transfer to
bypass”
and the system transfers to bypass mode
;( b) Press and hold the BYP key on the operator control panel
for longer than two seconds and the system transfers to bypass
mode. This needs to enable the switch behind the front door.
See Fig. 51.
Zoom in A area:
Fig. 51.
Enable the switch
Warning:
Ensure the bypass is working normally before transferring to
bypass mode. Or it may cause failure.
8.2.3. Switching the UPS into Normal Mode from Bypass
Mode
Two ways to transfer the UPS into Normal mode from Bypass
Mode: (a) Enter the menu Operate, touch the icon transfer to
inverter
and the system transfers to bypass mode
(b) Press and hold the INV key on the operator control panel for
longer than two seconds and the system transfers to Normal
mode.
Note:
Normally, the system will transfer to the Normal mode auto-
matically. This function is used when the frequency of the by-
pass is over track and when the system needs to transfer to
Normal mode by manual.
8.2.4. Switching the UPS into Maintenance Bypass Mode
from Normal Mode
These following procedures can transfer the load from the UPS
inverter output to the maintenance bypass supply, which is
used for maintaining the bypass module.
1.
Transfer the UPS into Bypass mode following section 8.2.2.
2.
Open the battery breaker and close the maintenance by-
pass. And the load is powered through maintenance bypass
and static bypass.
3.
Pull out the bypass module and the load is powered through
maintenance bypass.
Warning:
Before making this operation, read messages on LCD display
to be sure that bypass supply is regular and the inverter is syn-
chronous with it, so as not to risk a short interruption in pow-
ering the load.
Danger:
If you need to maintain the power module, wait for 10 minutes
to let the DC bus capacitor fully discharge before removing the
cover.
8.2.5. Switching the UPS into Normal Mode from
Maintenance Bypass Mode
These following procedures can transfer the load from the
Maintenance Bypass mode to inverter output.
1.
The bypass turns on 30S after the LED touch screen goes
on, the bypass indicator goes green and the load is pow-
ered through maintenance bypass and static bypass.
2.
Turn off the maintenance bypass switch and the load is
powered through bypass. The rectifier starts followed by
the inverter.
3.
After 60S, the system transfers to Normal mode.