KKT chillers ECO 133 L, Install Instructions Manual

Page: 16 / 39

83003502.Kc ECO_Install_Instruction_V03.odt
Page 16 of 39
5.8 Phase sequence
Observe the correct phase sequence when routing the wires, otherwise the cooling block
will not start. A phase sequence relay (4A1) is installed for this purpose.
The monitoring relay has ist own power supply, measured voltage = supply voltage.
The relay monitors the phase sequence an the phase failure of one of the three phases in
a 3-phase network. No settings are necessary.
When the line voltage is switched on, the green LED lights up. IF the correct phase
sequence is applied to the terminals L1-L2-L3, the output relay picks up.
If the wrong phase sequence is applied, the red LED blinks an the output relay does not
pick up. If a phase failure occurs, the red LED lights up an the output relay drops out.
Attention: The red LED is an error diagnosis indicator an does not show the current state
of the relay.