Minuteman UPS CPE 1000 ユーザーズマニュアル

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4.4. Inverter not Functioning 
 
4.4.1. Output Short-Circuit operating in the On-Line Mode 
 
If the output load becomes short-circuited while operating in the On-Line 
mode, the UPS will shutdown to prevent damaging the UPS and the 
remaining connected equipment.    The Fault LED illuminates and the alarm 
sounds continuously.  The UPS will not turn on automatically after the 
short-circuit condition has been removed.  The UPS must be manually 
restarted.  To restart the UPS after the short-circuit condition has been 
removed; press the Main Switch on the front panel to the "OFF" position first, 
then to the "ON" position. 
 
4.4.2. Output Short-Circuit operating in the Bypass Mode 
 
If the output load becomes short-circuited while operating in the Bypass 
mode, the AC fuse will open to prevent damaging the UPS and the 
connected equipment.    Remove the short-circuited equipment and replace 
the AC fuse with same ratings. 
 
4.5. Inverter Over-Temperature 
 
If the UPS experiences an over-temperature when the Utility is normal, the 
UPS will switch to the Bypass Mode.    The UPS will switch back to the On-
Line mode once the over-temperature condition has been eliminated.    If the 
over-temperature condition happens when the Utility is abnormal, the alarm 
will beep continuously, the Fault LED will illuminate and the output of the 
UPS will turn off. 
 
4.6. 
Inverter Over-Current and Output Voltage Out of Tolerance 
 
If the UPS’s inverter experiences an over-current or an out-of-tolerance 
output voltage, when Utility is normal; the UPS will switch to the Bypass 
mode and the Utility LED, Bypass LED and Fault LED will illuminate.    If the 
over-current or the out-of-tolerance output voltage condition happens when 
the Utility is abnormal, the Fault LED will illuminate and the output of the 
UPS will turn off. 
  O/P
OUTPUT
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Chapter Five: Maintenance Guide 
 
5.1. System Block   
 
 
 
5.2 Troubleshooting 
 
If the UPS malfunctions, check the list below to resolve the problem.  
Should the problem persist, call for service. 
 
Situation Check 
Items 
Solution 
Utility LED is not on and the 
UPS is on battery mode, 
when Utility is normal. 
AC Input cord is loose 
or AC Input fuse is 
open. 
1.Connect the Input 
power cord to the wall 
outlet. 
2.Replace the AC 
input fuse. 
3.If the problem 
persist call for service. 
The UPS switches to the 
Battery mode then back to 
the On-Line mode, when 
the connected device is 
turned on.  Or, the UPS 
switches back and forth 
between the Battery mode 
and the On-Line mode.   
1. 
Check if any power 
strip is connected to 
the UPS.   
2. Check the wall outlet.
1. 
Do not use power 
strips.  
2. Replace 
the 
wall 
outlet.  
The Overload LED is 
illuminated. 
 The 
UPS 
is 
overloaded.  Remove 
some of the load. 
 
 
 
 
 
PFC
AC/DC
INVERTER
DC/AC
BOOST
DC/DC
CHARGER
BATTERY
Control
Circuit