Service manual

For the reason of safety, please follow safety instruction to begin your work
STOP
High Voltage Danger: Some components contain residue charge and remain dangerous
high voltage even if the external power supply is cut of, operator should follow following
instruction strictly avoid risk of electrical shock.
1.Unplug the power cord from the utility.
2.Open outside case shown in the beginning of this manual
3.Remove connectors from battery, for long backup time model, unplug battery cabinet
connector to UPS.
4.Discharge energy in BUS CAPACITORS, and CHARGER CAPACITORS
5.Disassemble cable from connectors, if required.
6.Disassemble PCB if required.
Before starting service, some tools are necessary, at least: A DMM (Digital Multifunction
Meter) meter, screwdrivers and discharge resistor (100Ω/10W recommended). A DC
power supply with current limiting (over current protection) function (120VDC/3A at least)
is recommended for fast and safe diagnosis.
TO DISCHARGE the residue charge on bus capacitor,
For 1k(s) model contact P2/P8 BAT (-) terminal and upper lead of R4 with a 300Ω/10W
resistor to discharge +BUS capacitor, contact P2/P8 BAT (-) terminal and upper lead of
R1 with a 300Ω/10W resistor to discharge +BUS capacitor
For 2k(s)/3k(s) model, contact P01 BAT (-) terminal and upper lead of R104 with a
300Ω/10W resistor to discharge +BUS capacitor, contact P01 BAT (-) terminal and R118
(2k/3k) upper lead with a 300Ω/10W resistor to discharge +BUS capacitor
TO DISCHARGE the energy of charger capacitor, after disconnect the battery from
PSDR/Charger, you can use a 300Ω/10W resistor contact BAT (+) terminal and BAT (-)
terminal for discharge battery filter capacitor
!
DO NOT power up UPS with the mains unless you are sure that you have replaced all
defective components.
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