Emerson 7400 - Manual (Page 56)

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Series 7400 Single Phase 1+N UPS
5.1 Introduction
This chapter contains the procedures necessary to effect general
maintenance of the UPS module and battery. Certain procedures
entail gaining internal access to the UPS, and should only be
undertaken by a competent engineer who is familiar with the
operation and layout of the equipment and understands the areas
of potential hazard. If you have any doubts concerning safety or
the method carrying out any procedure then contact an approved
service agent for assistance or advice. If the locally approved
agent is known to you, then you should contact the Customer
Services & Support department at the address shown at the front
of this manual.
The manufacturer offers customer training, at a nominal fee, if
required. Such training can range from a one-day operator course
to in-depth training on maintenance and troubleshooting lasting
several days, and can be carried out at the manufacturer’s plant or
at the customer premises.
5.2 Safety Precautions
When working on the UPS remember that the equipment contains
live voltages at ALL TIMES unless it is externally isolated from the
mains supply, bypass supply and batteries. It is essential that the
safety and precautionary notes contained throughout this manual
are read and FULLY UNDERSTOOD before touching any UPS
internal component part.
5.3 Scheduled Maintenance
The UPS utilises solid-state components which are not subject to
wear, with the only moving parts being the cooling fans. Scheduled
maintenance requirements, beyond ensuring that the
environmental conditions remain suitably cool and clean, are
therefore minimal. However, a well documented periodic program
of inspection and preventive maintenance, as suggested below, will
help to ensure optimum equipment performance and may serve to
detect certain minor malfunctions prior to them developing into a
major fault.
Carry out a daily walk-by inspection of the UPS, checking the
following points:
1. Carry out a spot check of the operator control panel; ensuring
that all mimic LED indications are normal, all metered
parameters are normal and no warning or alarm messages are
present on the display panel.
2. Check for obvious signs of overheating.
3. Listen for any noticeable change in audible noise.
4. Ensure that the ventilation grills around the UPS are
unobstructed.
5. If possible, log the results of the inspection, noting any
discrepancies from the norm.
C h a p t e r 5 C h a p t e r 5
Maintenance
5.3.1 Daily Checks