General Warnings And Precautions - Kohler PW 6000 User Manual

5.1.3

General warnings and precautions

WARNING: The operating procedures given below must be performed by a trained operator.
WARNING: When the UPS system is operating on
load supply is unprotected if the bypass mains supply fails. It is essential that the load user is informed of this
possibility before you select a
WARNING: When the UPS is shut down, power is still applied to the UPS input/bypass terminals unless the
input/bypass mains is isolated at the UPS supply switchgear panel. In a single module installation it is not
permissible to turn off the external input/bypass mains supply when the load is connected via the internal
maintenance bypass switch (IA1) as this will also disconnect the load power. Under these circumstances the
UPS will ALWAYS contain live mains voltages.
Key Point: To reduce the possible effects of any high inrush currents that might occur when the load is initially
turned on, we recommend that you power-up the load when the UPS system is operating on maintenance
bypass, as described in the start-up procedure.
Key Point: Depending on the model of the TFT assembly fitted to your UPS, the display may be slightly
different to that shown in this chapter. In particular the 'rectifier' power block might be labelled as 'booster.'
These two terms are interchangeable and do not imply any variation in function or operation.
IMPORTANT NOTE (MAINTENANCE BYPASS SWITCH)
In the following procedures, all references to the 'Maintenance Bypass Switch' apply to the internal
maintenance bypass switch (IA1) in the case of a single cabinet if it is not connected to an external
maintenance bypass facility.
Where an external maintenance bypass facility is installed (standard in a parallel-module system) all
references to the 'Maintenance Bypass Switch' apply to the maintenance bypass switch in the external
facility. You should familiarise yourself with the operation of the external maintenance bypass circuit
before using the following UPS operating procedures.
Note: As you step through these operating procedures several events will be logged in the UPS events register,
accompanied by the appearance of the WARNING triangle in the TFT Header bar and, in some cases, accompanied by
an audible alarm. When this occurs you can cancel the audible warning by pressing the triangular warning symbol.The
TFT Control Panel is described in paragraph 2.6.
© 2023
Kohler Uninterruptible Power
BYPASS operating mode.
12/9/23
5: Operating Instructions (TFT)
BYPASS or via the MAINTENANCE BYPASS SWITCH, the
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