Power supply ICOS-PS 3160 series Installation, use and maintenance manual - EN
Ver. 1.05 49
6.4 Working operation and possible anomalies
When the capacitors charging phase is over, the power supply unit activates the PWG digital output and the
PWG LED is turned ON, indicating that the power supply unit is ready; from this moment, the load can be ac-
tivated and can remain in this status as long as the PWG digital output remains active.
Here are the causes due to which the power supply unit may enter the alarm status during the operational
phase:
• input supply voltage < 120VAC
• output overload (concerning single-phase or three-phase power supply)
• power supply missing phase
• short-circuit of the dynamic brake resistor
Power
supply
missing
phase
Lamp On Off 0 0
Voltage
>250VDC
within 5s
from the
start
One of the three
phases of power
supply is missing or
the power supply unit
has not been set to
single-phase
operation.
Wait for the reset
signal.
The charge
phase takes
longer than
5s
Lamp On Off 0 0
Voltage
<250VDC
after 5s
from the
start
Faulty charging
circuit of the power
supply unit.
Wait for the reset
signal.
If the PWG signal turns off, it means that there is an alarm and the load must be disconnect-
ed, in order to reduce the risk of damaging the power supply unit.
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