Liebert UPS System - Manual (Page 121)

Chapter 10 Service after Sales
115
No.1 Fault description Reason Actions to be taken
34 Output surge current
Surge current occurs in bypass
mode, the system shutdown Avoid applying big load abruptly and
short circuit
35
Transfer to bypass due to
surge
The system transfers to bypass
mode due to surge current and
back to inverter mode after load is
decreased
Avoid applying load abruptly and the
UPS can recover automatically
36
Neighbouring UPS module
requires to transfer to
bypass mode
In parallel operation system,
some UPS module may require to
transfer to bypass due to surge or
overload, other modules will
transfer to bypass after receiving
the signal sent by this UPS
module that requires to transfer to
bypass mode
If the parallel operation system
transfers to bypass mode, and the
operation condition enables, all the
UPS modules can recover to normal
mode synchronously.
37 User’s wrong operation
Wrong operation such as start the
UPS with the maintenance
bypass switched on
Operate with reference to User’s
Manual
38
The actual transfer times
exceed the permissible
transfer times per hour Transfer times exceed the times
set by background. The system
will stay in bypass mode until next
hour.
Avoid frequent overload
10.2 Warranty
We provide 1 year of free service for our UPS (including the battery).
The above warranty shall not apply in the following circumstances:
The battery is provided by user;
Damage resulting from operation not in accordance with the user manual;
Damage as a result of fire, flood, etc.;
Different levels of customized service packages are available with reasonable
charge, including responsive, preventive maintenance, warranty period extension,
etc. For detailed information, please contact the distributor or the local technical
support center.