DS-E Series（1~6KVA）User’s Manual
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some procedures that are frequently performed. These procedures are used to
prevent system failure as well as to obtain best operating efficiency. Remedial
maintenance includes searching for system malfunction to facilitate effective
repair.
4.6.1 Safety Precaution
In order to securely and successfully conduct system maintenance, relevant
safety precautions must be observed and necessary tools and testing
equipment must be used, with the participation of qualified maintenance
personnel. Pay attention to the following safety operation rules:
1． Bear in mind that there is dangerous voltage in UPS even if the UPS
system is not in operation.
2． Make sure that the UPS operation and maintenance personnel are
familiar with this equipment and the content of this Manual.
3． When operate UPS, do not wear gold or silver jewelry such as ring or
watch, etc.
4． Do not take the safety operation procedure for granted. If there is any
doubt, consult personnel who are familiar with the equipment.
5． Be cautious that there is dangerous voltage in UPS. Before
maintenance and adjustment, use voltmeter to check and ensure that
the power is turned off and the equipment is under safe condition.
4.6.2 Preventive and Regular Maintenance
The following shows the preventive maintenance procedures which will
improve UPS system operation efficiency and reliability.
1． Keep the environment clean to avoid dust and chemical contamination
to the UPS.
2． Cable connection
Semiannually check the input and output cable connecting terminals
once. Carefully measure and check them to ensure good contact.
3． Check the working status of the vent fan on a regular basis to prevent
clogging of the air outlet. Repair it if there is any damage.
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