control only for Open and Close but
local Stop can still be used by turning
the red knob anti-clockwise.
3.3 Display–Local Indication
Fig. 3.2 The Actuator Display
The display consists of:
1. Red – position indication lamp
2. Yellow – position indication lamp
3. Green – position indication lamp
4. Liquid crystal display screen (LCD)
5. Infra-red sensors
6. Infra-red signal confirmation
indicator (Red)
The liquid crystal display screen has 2
modes of position indication:
1. Valve position – power on
2. Valve position – power off
On power up the actuator’s liquid
crystal display screen is back-lit with a
“soft amber” light and one of the
indicator lamps will be on, dependent
on position. The display screen will
show percentage open or an end of
travel symbol. (See Figs 3.3, 3.4 and
3.5)
As standard, red lamp signifies valve
open, yellow intermediate, and green
lamp signifies valve closed. Open and
closed colour functions can be reversed
on request.
Open
Red indicator and open symbol
displayed
Fig. 3.3
Mid Travel
Yellow indicator and percentage open
value displayed
Fig. 3.4
Closed
Green indicator and closed symbol
displayed
Fig. 3.5
With the main power supply switched
off, the liquid crystal display screen is
powered by a battery and continues to
display actuator position. However, the
battery does not support screen back-
lighting, or position indicator lamps.
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