Simplex POWERSTAR 110 KW - Diagnostics and Troubleshooting; Introduction; General Maintenance

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9.0 DIAGNOSTICS AND TROUBLESHOOTING
9.1 Introducon
Through good pracce, cumulave issues can be prevented through basic maintenance.
In the unlikely event that something goes wrong with the load bank, we will cover how
to solve some of the more common problems. Finally, if the need arises, we will cover
how to replace various parts for the load bank.
In this secon, you will learn:
— How to perform preventave maintenance on the placeholder hardware.
— Some common issues that you may run into and how to troubleshoot these
items independently.
— The part names and numbers, and each of the primary funcons is in the load
bank.
9.2 General Maintenance
The load bank has been designed to require minimum maintenance. All components
have been chosen for a long, reliable life. Two basic intervals of maintenance are
required: each operaon and either
every 50 hours or 6 months (whichever
comes rst).
9.2.1 Each Operaon
The air intake screens and
louvers, fan and cooling chamber,
and exhaust openings must be
checked for any obstrucons or
foreign objects. Due to the high
volume of air circulated, paper
and other items can be drawn
into the air intake. During load bank operaon, ensure that air is exing from the
exhaust vent. The load branches should be checked for blown fuses or opened
load resistors. To check the fuses or load resistors, operate the load bank from
a balanced 3-phase source and check the three-line currents. The three-current
readings should be essenally the same. If a sizable dierence is noted, one or
more load fuses or load resistors may have malfunconed.
9.2.2 Every 50 Hours or 6 Months
Check the ghtness of the electrical connecons. The expansion and contracon
caused by load bank operaon may result in loose connecons. The vibraons
caused by the cooling fan may also loosen electrical connecons. If the load bank
is transported long distances, the electrical connecons should be checked for
ghtness at a shorter-than-normal me interval. For a detailed inspecon guide,
see “4.3 Primary Inspecon” on page 13.
WARNING
Always remove all power from the
load bus and all fan/control power
before servicing the Load Bank.
Never operate or service a Load
Bank that is not properly connect-
ed to an earth-ground.