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ZY120 6-20kVA (11) User Manual EN rev.04.doc
Remove the cover that protects the Maintenance Bypass CB from misoperation and the UPS
transfers to Bypass Mode with warning and wait until the LED indicator for bypass goes
green
(b) Close the Maintenance Bypass CB.
(c) Open the CB for output and input and disconnect the battery( For the standard UPS type ,
pull out Battery terminal of positive and negative ; for the long run type UPS, open the battery
CB).
3. Transfer back to Normal Mode
After the maintenance is finished, follow the procedures below to transfer the UPS to Normal
Mode from Maintenance Bypass Mode.
(a) Connect the battery (For the standard UPS type, connect the Battery terminal of positive
and negative; for the long run type UPS, close the battery CB)
(b) Close the CB for Input and Output.
(c) Open the CB for Maintenance Bypass and install the cover.
8. BATTERY MAINTENANCE
The UPS only requires minimal maintenance. The batteries used for standard models are value
regulated, sealed lead-acid, maintenance free battery. When being connected to the utility power,
whether the UPS is turned on or not, the UPS keeps charging the batteries and also offers the
protective function of overcharging and over-discharging.
⚫ The UPS should be charged once every 4 to 6 months if it has not been used for a long time.
⚫ In the regions of hot climates, the battery should be charged and discharged every 2 months.
The standard charging time should be at least 12 hours.
⚫ Under normal conditions, the battery life lasts 3 to 5 years. In case if the battery is found in bad
condition, earlier replacement should be made.
⚫ Battery replacement should be performed by qualified personnel.
⚫ Replace batteries with the same number and same type of batteries.
⚫ Do not replace the battery individually. All the batteries should be replaced at the same time
following the instructions of the battery supplier.
9. NOTES for BATTERY DISPASAL and REPLACEMENT
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