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User Manual 200 kVA-1200 kVA UPS 6 Maintenance
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2. The basic requirements of equipment management are as follows: ensure the mechanical performance of the
equipment is intact, the electrical performance of the equipment meets the standard requirements, the
operation of the equipment is stable and reliable, and the technical data and original records related to the
equipment are complete.
6.3 Preventative Maintenance
6.3.1 Monthly Maintenance

Check the operation conditions of the equipment, including ambient temperature, humidity, input and output
voltage, frequency, load type, load rate, various alarm information, etc.

Check UPS for any abnormal sound. If yes, identify the source of abnormal sound, especially the fan, the
power unit and the bypass unit. If the reason cannot be identified, contact the customer service center in time.

Check whether the input and output connection terminals of the equipment are firm, the connection cables
are intact, aging or damaged. If damaged, analyze the cause of damage and pay special attention to rat
prevention.

Check the UPS monitoring panel to confirm that all graphical display units on the monitoring panel are in
normal operation, and all operating parameters of the power supply are within the normal range, and there is
no fault or alarm information in the displayed records.

Clean and dedust the equipment.

Observe whether there is any change in the load of UPS, and check and record increase and decrease of the
load regularly.

Check and record the operating environment temperature and humidity of UPS.

Check that the UPS parameters are conFig.d correctly.

Fill in UPS maintenance report form, classify and deal with abnormal situation and alarm.

Export alarm information from the system and analyze the alarm information, and the output alarm analysis
report.
6.3.2 Quarterly Maintenance
Repeat monthly maintenance.

Thoroughly dedust and clean UPS, especially the dust accumulating on the fans and air inlet and outlet.

Check input and output cables and terminals for aging, breakage, burning and loosening. Reinforce all
input-output terminals if necessary.

If conditions permit, the internal key components of UPS shall be inspected, mainly including the following
components:

Electrolytic capacitor: check for leakage, bleeding and expansion.

Transformer and inductance: check for color change caused by overheating, and delamination.

Cable and wiring: check whether the sheath of the connecting cable is damaged, cracked and scraped,
reinforce the connecting terminals of all power cables, and check whether the cables between the boards are
firmly installed.

Printed circuit board: check the cleanliness of printed circuit board and circuit integrity, pay attention to
check for color change caused by overheating, and whether the components on the circuit board are intact,
damaged and corroded.

Check whether input, output, battery, load voltage and current are consistent with system requirements and
those displayed on LCD with the multimeter and the clamp current meter.