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5.3.2 Weekly Checks Carry out the following checks from the mimic panel and log the
results:
1. Measure and record the battery float charge voltage.
2. Measure and record the battery charge current.
3. Measure and record the UPS output voltage on all three phases.
4. Measure and record the UPS output line currents. If these are
significantly different from the values previously logged then, if
possible, record the size, type and location of any additional load
connected to the UPS supply since the previous inspection. This
type of information could prove useful to the troubleshooting
engineer should a problem occur.
If any of the above indications differ greatly from the previously
logged values for no apparent reason then you should contact the
Customer service & Support Department at the address given at the
front of this manual for advice.
5.3.3 Annual Service The equipment should be thoroughly cleaned and the following
checks carried out annually. This entails working inside the equipment
in regions containing hazardous voltages.
A manufacturer-trained engineer is fully aware of the hazard
concerned and will carry out this procedure with the load connected
to the maintenance bypass supply; however if the customer decides to
carry out this service procedure himself it is imperative that the UPS
be totally shut down and isolated from the input mains and bypass
supplies and batteries using the procedure given below. We therefore
strongly recommend that the annual service is carried out by trained
personnel.
1. Carry out the weekly checks detailed above.
2. Shut down the UPS following the recommended operating
procedure.
3. Isolate the UPS input mains supply externally (also the bypass
supply if a split bypass system is in use) and isolate the battery.
4. Ensure that the UPS is totally powered down by checking for
voltage at the rectifier input connections (U1, Vl & WI), the battery
connection terminals, the output connections (U2, V2 & W2) and
the bypass input connections (U3, V3 & W3).
5. Gain full access to the UPS interior by opening its internal hinged
safety panel.
6. Carry out a thorough examination of the UPS power components
and sub-assemblies, paying particular attention to the following:-
Electrolytic capacitors - Check for signs of leakage, buckling etc.
Magnetic components - Check for signs of overheating, security of
fixture and signs of delamination.
Cables and connections - Check cables for chaffing, fraying or
signs of overheating. Check that all printed circuit board
connectors are secure.
Printed circuit boards - Check the cleanliness and integrity of the
circuit boards and replace if any signs of deterioration are found.
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