Emerson 7400 User Manual
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Series 7400 Single Phase 1+N UPS
Corrective Action
When all the indications have been noted, you should refer to the
following fault interpretation charts and carry out the actions
detailed against any led whose status is abnormal. If you are
unsure as to how to undertake the actions detailed - or if several
LED indications are abnormal and you are unable to distinguish
between the likely cause and affects - then seek immediate
assistance from an approved service agent.
Fault Reporting
Irrespective of whether fault rectification is successful or not, report
the fault occurrence to the nearest service agent - who will then
forward the details to the manufacturer. This type of customer
feedback is an important factor in maintaining high product
reliability, and also provides important data concerning the
equipment field performance.
CAUTION
The following diagnostic charts are designed for ‘first aid’
troubleshooting only. If a problem cannot be resolved by
taking the actions given then fully trained assistance should
be sought immediately.
Do not under any circumstances make internal circuit
adjustments or interfere with the circuit boards in any other
way.
Uninterruptible Power System
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LS1
LS2
LS4
LS6
LS3
LS5