Indicator Lights - Grundfos CU 401 Instrucciones De Instalación Y Operación

4. Indicator lights

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Digital inputs 1 to 6:
The indicator light is yellow when the input is active.
Relay outputs 7 and 8:
The indicator light is yellow when the output is active.
Fault (F):
The indicator light is red if the CU 401 unit does not function
correctly.
Power (P):
The indicator light is green when the CU 401 unit is active
and OK.
Run (R):
The indicator light is green when the application program is
running correctly.
UPS battery back-up (BATT):
The indicator light is green when
• the battery for the UPS battery back-up (PU 102) is
The indicator light is off when
• the UPS battery back-up (PU 102) has not been fitted.
• the battery for the UPS battery back-up (PU 102) has not
charged and capable of powering the CU 401 in case of
supply failure.
been charged.
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