GE Digital Energy, User Manual

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9

User manual ML Series 350-1000 VA UPS 1.0 (GB)

6  -  TROUBLESHOOTING   

Whenever a malfunction occurs, first check external factors (e.g. connections, temperature, humidity or  

load) to determine whether the problem is caused by the unit itself or by its environment. Subsequently  

check the input fuse: it may be blown. If so: replace the fuse (see 5.2) and be sure that the UPS is not  

overloaded. 

The following chart is a simple troubleshooting checklist only. If the suggested solution does not succeed,  

or if the information is insufficient to solve the problem, please contact your dealer or consult 

www.gedigitalenergy.com.   

PROBLEM  

 POSSIBLE CAUSE  

 SOLUTION  

Blown input fuse  

 Output overload  

 Reduce load, replace fuse  

 System failure  

 Please contact your dealer or  

consult www.gedigitalenergy.com  

No output voltage during self  

test (3.2.2)  

System failure  

 Please contact your dealer or  

consult www.gedigitalenergy.com  

Only battery start possible  

 Blown input fuse  

 See above  

No communication between  

computer and UPS  

Computer interface problem  

 Check interface cable and  

attached computer.  

UPS operates on battery  

though mains is present  

Blown input fuse  

 See above  

Very high, low or distorted  

mains voltage  

Check mains voltage, contact  

qualified electrician  

Continuously sounding  

buzzer  

mains present  

UPS overload  

 Reduce load  

Continuously sounding  

buzzer  

mains not present  

UPS overload in battery mode  

 Reduce load  

UPS does not provide the  

expected back-up time, no  

alarm ‘replace battery’  

Weak battery: recent outage or  

worn out battery  

Charge the battery. If the battery is  

near the end of its service life,  

consider replacing the battery  

even if the ‘replace battery’ alarm  

is not yet active.  

Blinking LED ‘BAT’,  

intermittent buzzer  

Battery test just after  

installation or mains failure  

Allow the UPS to recharge the  

batteries  

Weak battery  

 Read 5.3  

UPS output switches OFF  

 Battery depleted during mains  

failure: end of runtime  

Wait until mains returns  

Load is less than 5% of rated  

output and no mains power is  

present (no-load shutdown  

function is active)  

Wait until mains returns  

Load is more than 150% of  

rated output  

Reduce load