Trouble Shooting - KStar YDC9300-0.8 User Manual

Please contact the distributor if problems can not be solved by trouble shooting
below
No Problem description
No display on the
1 LCD, no self-
diagnostics
AC normal but AC
2 indicator off, the UPS
is in battery mode
3 No alarm but no output
UPS doesn't start after
4
pressing On button
5 AC indicator blinking
Buzzer beeps twice
every second, the LCD
6
shows "output
overload"
"Fault indicator On and
7 the LCD shows
"battery fault"
Fault indicator on, the
8 LCD shows "charger
fault "
9 Abnormal backup time
Long beeps, fault
10 indicator on, LCD
show...

5 Trouble shooting

Probable causes
A Input power absent
B Low input
A Input circuit breaker off.
B Input power connection
problem
Output connection
problem
pressing ON button time is
insufficient
B Overload
Input AC is beyond normal
range
UPS overload
A Battery circuit breaker
off or poor connection
B Reverse battery
connection
C Battery defective
Charger defective
A Battery not fully charged
B Battery terminate
Over temperature inside
UPS
- 32 -
Solution
Use Multi-meter to measure the
input to see if it is normal or not.
A Switch on the input breaker
B Check the connection and re-do
Check the connection and re-do
A Press and hold On button for 1s
B Disconnect all loads and restart
Pay attention to the backup time if
the UPS is in battery mode
Disconnect some loads
A Switch On the breaker, check
the battery connections
B Check the battery polarity
C Contact distributor to replace
battery
Contact distributor
A Charge battery for 8 hours when
AC is normal, then test the
backup time again
B Contact distributor to replace
battery
A Check to see if there is wind
blown out from the fans
B Move objects away from the
UPS
C Wait till the UPS cools down
and restart UPS