OPTI-UPS SS45K33 - Manual (Page 10)

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Maintenance By‐pass :
□ Close Mold cast circuit breaker “Off” of every load.
□ Pushing the green button “Off” on front panel, although there is no output voltage, the AVR is
still in action.
□ Switch MCCB(1) Mold cast circuit breaker to “Off” position.
□ Switch MCCB(2) Mold cast circuit breaker up to “On” position.
□ Using Ture RMS voltage meter to measure the O/P N, U V W on the terminal board, if the output
voltage is correct, AVR is by‐pass successfully.
9‐ Maintenance & Cleaning
Do the cleaning during the input Mold cast circuit breaker MCCB(1) and maintenance
by‐pass MCCB(2) switch is in “Off” position for human health.
Do not use detergents or any cleaning material that may damage the cabinet surfaces.
Do not let any liquid get into the AVR.
Ensure that the air holes are open.
The AVR body can be wiped with a clean and dry cloth.
Check the area surrounding the AVR. Ensure the area is not cluttered, allowing free
access to the unit.
Ensure the air intakes (vents on the front doors) and exhaust opening (on rear of the AVR
cabinet sections) are not blocked.
To ensure maximum life of the equipment,the following should be part of an annual maintenance
program.Warning De‐energize unit before performing maintenance.Voltages are present inside this unit
which can cause injury.Therefore,only personnel qualified to service electrical equipment should
perform maintenance on this unit.
‐Vacuum the voltage regulator inside and out to remove accumulated dirt, which could lead to
overheating or insulation failure.
‐Tighten all electrical connections,particularly all power wiring to,and in,the unit.
‐Inspect all variable transformer brushes and commutators for signs of wear or pitting. Replace as
required.Do not attempt to clean a commutator with an abrasive such as sandpaper or a file. This will
ruin the soft precious metal plating on the commutator and will shorten the life of the unit. It is
normal for commutators to become black due to carbon brush tracking. If a commutator is to be
cleaned,use denatured alcohol and a soft cloth.