Service manual

1.3 Important Safety Instructions
STOP
1. For qualified service personnel only.
2. DO NOT performs any internal service or adjustment of this product unless another person is
capable of rendering first aid and resuscitation is present.
3. Dangerous voltage exists at several points in this product. To avoid personal injury, don't
touch any exposed connections or components while UPS is active.
4. Turn off the UPS and disconnect input power cord before removing outside protective cover.
5. AC voltage is always present if the input AC power is still available.
6. High voltage may present at DC capacitors. Before opening the outside cover, wait for at least
five minutes after turning off the UPS.
7. Verify input source (voltage and frequency) is within the maximum range before service.
!
1. DO NOT short-circuit internal batteries
2. If the battery connectors [BAT (+), BAT (-)] are disconnected, be sure to plug in the input
power cord and the input power is available before re-connect the battery connectors.
3. After service, verify the polarity of batteries, fasten all screws and connectors before
restarting the UPS.
After opening the cover, please always check the tightness of all wires, connectors, and
screws first. Then check if there are any de-colored components inside
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
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