48 Chapter 7 Maintenance And Troubleshooting
Liebert
®
ITA 10kVA UPS User Manual
Emerson will not be liable for any environment results caused by improper disposal for the waste and old battery
products, if the user does not comply with the notice in this chapter or use the waste and old battery recycle system
provided by Emerson.
7.3 Cleaning UPS
Clean the UPS periodically, especially the ventilation holes, to ensure that the airflow can circulate freely in the UPS
chassis. Clean the UPS with a vacuum cleaner, if necessary. Confirm that no object obstruct the ventilation of the
UPS.
7.4 Checking UPS Status
It is recommended to check the UPS operation status once every half year.
The checking content includes:
1. Check whether the UPS is faulty: Is the fault indicator on? Is the UPS giving any fault alarm?
2. Check whether the UPS works in Bypass mode. Normally, the UPS should operate in Normal mode, if it operates
in Bypass mode, find out the reason, such as operator intervention, overload, internal faults, and so on.
3. Check whether the battery is discharging. When the mains is normal, the battery should not discharge, if the UPS
operates in Battery mode, find out the reason, such as mains failure, battery test, operator intervention, and so on.
7.5 Checking UPS Functions
警告
危 险
Notice
The operation procedures for checking the UPS functions may cause power interruption to load.
It is recommended to check the UPS functions once every half year.
Before conducting the functions check, confirm that the mains is normal and backup the data. The procedures are as
follows:
1. Press the OFF key, check whether the buzzer, indicators and LCD are displayed normally.
2. Press the ON/SILENCE key to check again whether the indicators and LCD are displayed normally, and whether
the UPS has been transferred to Inverter mode.
3. After the UPS operates in Inverter mode (inverter indicator is on), press and hold the ON/SILENCE key for four
seconds to start the battery self-test to check whether the battery is normal. If any battery problem is found, find out
the reasons immediately and take measures to solve the problem.
7.6 Troubleshooting
In case of UPS abnormity and fault, first check and remove the fault according to the instruction in Table 7-1. If the
problem still exists, seek technical support or service by contacting Emerson service hotline 4008876510 or local
dealer.
Table 7-1 Troubleshooting
No.
Fault
Cause Analysis
Disposal Method
1
Mains switch is closed, but the
UPS provides not display on
the display panel. The system
does not conduct self-test
Input power is not
connected to the UPS
Check that the UPS input cables are connected properly
Input voltage is too low
Use a voltmeter to confirm that the UPS input voltage is
within specifications
2
The mains is normal, but the
mains indicator is off, and the
UPS is in Battery mode
UPS mains switch is open
Close UPS mains switch
Input cables improperly
connected
Check that the UPS input cables are connected properly
3
No UPS alarm generates, but
the UPS has no output voltage
Output cables improperly
connected
Ensure that the output cables are connected properly
