Norgren VS18 Series Valve Advantage - Manual (Page 81)

VS18/VS26 MAINTENANCE & INSTRUCTION BOOKLET
8.6.8 Diagnostics
The VS18/VS26 AS-Interface slaves report missing +24V for the valves to the ASi master as a
peripheral fault. If the valve power is not present the red LED is blinking too.
8.6.9 AS-Interface LED indicators
ASI 1 (green) – This LED will only be energised when the Network power is connected to the
Network connector, indicating that the ASi 1 logic circuit of the module is
powered.
DG 1 (red)
–
This LED indicates the status of the 1 st ASi IC.
ASI 2 (green) –
This LED will only be energised when the Network power is connected to the
Network connector, indicating that the ASi 2 logic circuit of the module is
powered.
DG 2 (red)
– This LED indicates the status of the 2 nd ASi IC.
VA (green)
– This LED will only be energised when 24 volts is applied to the valve power
terminal of the power supply connector.
Indicator status during powering up and commissioning
Condition ASI 1 DG 1 ASI 2 DG 2 VA
Power up on on on on on
Device in a pre-operation state on on on on on
Device in an operation state on off on off on
Valve power is missing on blinking on blinking off
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