Alfa Laval ThinkTop Digital 8 User Manual

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6. Fault finding6.1 Fault finding and LEDs
Below is stated the meaning of the LEDs' indications for fault finding in connection with the operation of the ThinkTop
®
.
Red flashing: Unit in set-up mode or internal software fault.
If internal software fault, re-programme unit.
Red steady: Unit in set-up mode or internal hardware fault.
If internal hardware fault, check if magnet is in range and check correct wiring.
1. Orange flashing: Time for maintenance has run out.
The unit has been self-adjusted into a maintenance alert condition.
Valve maintenance is strongly recommended. After maintenance: Disabling of
maintenance/self-adjustment function is required before setting new position,
however, it is strongly recommended to make a complete new set-up after valve
maintenance.
2. Orange steady,
yellow flashing
(A and/or B): The unit has been self-adjusted into a maintenance alarm condition and the feedback
is lost (a minimum of seal left).
Valve maintenance is required. After maintenance: Disabling of the self-adjustment
function is required before setting new position, however, it is strongly
recommended to make a complete new set up after valve maintenance.
NOTE! The maintenance indicator lighting up, and an open or closed light
flashing.....
= Note the following:
• Self-adjustment programme is only valid for SRC/ARC valves, do not use
the programme for other valve types.
• Use tolerance/valve type 1.
• In conjunction with valve type change-over; 21, 22, 31 and 32, the open
position must be defined as the upper sensor position (when the magnet is
in the highest position).
• A loose top, magnet holder or sensor system can also generate the alert/
alarm condition.
• Removing a ThinkTop
®
with self-adjust activated, will immediately generate
an alarm condition! If the ThinkTop
®
has to be removed, not because of a
valve maintenance issue, but for some other reasons, and you want to store
the already adjusted data - disable the self-adjust function before removing
the ThinkTop
®
and enable it again once the ThinkTop
®
is back on the
actuator.
• After valve maintenance a disabling of the self-adjustment function is
required before setting a new position, however, it is strongly recommended
to make a complete new set-up (disable all functions in step 2 valve type -
and make a complete new set-up).
Red
Orange
Yellow A
Yellow B

Alfa Laval ThinkTop Digital 8 Specifications

General

Brand	Alfa Laval
Model	ThinkTop Digital 8
Category	Control Unit
Language	English