Delta Electronics RT Series User Manual page 61

Error
Meaning
Code
Battery
Sd4
Low Shut-
down
B. About other problems that might happen
No. Problem
1 Overload
Battery
2
Missing
Weak Battery/ Battery
3
Replacement
NOTE :
If all possible causes are eliminated but the alarm still appears, please
contact your local dealer or customer service.
Possible Cause
The UPS transfers to
run in battery mode
due to AC utility abnor-
mality; however, the
battery power is almost
used up.
Possible Cause
The UPS is overloaded.
1. Wrong battery wiring.
2. Battery cables are
not connected or not
Batteries are damaged
or battery life time is
due.
57
Chapter 11 Troubleshooting
Solution
1. Check the main AC source
and the main power cord's
status.
2. Contact service personnel.
Solution
Decrease your con-
nected loads.
1. Contact service
personnel.
2. Connect the battery
cables and connect
Contact service person-
nel.