Maintenance; Appendix 1 Problems And Solutions - LEGRAND NUMERIC HP i 33 User Manual

6. MAINTENANCE

CAUTION
All the maintenance operations should be done by authorized Numeric UPS Technical
Service Personnel.
Before working on this circuit
- Isolate Uninterruptible Power System (UPS)
- Check for Hazardous Voltage between
all terminals including the protective earth
Risk of Voltage Backfeed
WARNING
Hazardous moving parts
Keep away from moving fan blades
WARNING
Hot surface inside. Contact may cause burn.
Do not touch.
Wear protective gear before touching
the surface internal parts.
However, it is important to remember that electrical power equipments need regular checks. As they have
their own life cycle. They need to be checked regularly and, if needed be replaced. This is referred in particular
to the batteries, the fans and in some cases, to the electrolytic condensers.Therefore, a preventive maintenance
programme is strongly recommended. This preventive maintenance programme must be entrusted to
specialized personnel authorized by manufacturer. Our Technical Servicing department is at your disposal for
customized preventive maintenance options.
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APPENDIX 1
PROBLEMS AND SOLUTIONS
In case the UPS does not work normally, it might be a case of wrong installation, wiring or operation. Please
check these aspects first. If all these aspects are checked and no problems are found, please consult with local
agent right away and provide the following information.
1. Product model name and serial number
2. Describe the fault with more details, such as LCD display info, LED lights status, etc.
Read the user manual carefully, it can help a lot for using this UPS in the right way. Some FAQs (Frequently
Asked Questions) may help you to trouble shoot your problem easily.
S.No. Problem Possible reason
1. Utility is connected but the UPS Input power supply is not
cannot be powered ON. connected; Input voltage low;
The input switch of the UPS is
not switched on.
2. Utility normal but utility LED The input switch of the UPS are
does not light up and the UPS not switched on; Input cable is
operates at battery mode not well connected
3. The UPS does not indicate Output cable is not well
any failure, but output does not connected; Output switch
have voltage is not on
4. Utility LED is flashing Utility voltage exceeds UPS
input range.
Solution
Measure if the UPS input
voltage/frequency is within the
window.
Check if UPS input is switched on
Switch on the input switch;
Make sure the input cable is well
connected.
Make sure the output cable is well
connected;
Switch on the output switch.
If the UPS operates at battery
mode, please pay attention to the
remaining back up time needed
for your system.
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