Pump Block Status Indicator (Loading Pump) - Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS

6.2 Pump Block Status Indicator (Loading Pump)

The status LED that is located on the interior front panel above the pump head of the
loading pump indicates the operational status of the pump block (→ Fig. 91, page 226):
LED
The LED is dark.
The LED is green.
The LED flashes green:
In normal operation
During pump
maintenance
The LED flashes red.
Page 146
Operational Status
The pump head is not delivering (no flow).
The pump head is delivering.
In addition, the message 'Compression limit reached' appears
in the Chromeleon Audit Trail.
The compression value was 100% during each of the past
three strokes. If the compression value is lower than 100%
for several strokes afterward, the message 'Compression back
to normal' will appear in the Audit Trail.
For more information about the compression values, see
section 6.7 (→ page 174).
The pistons are in the appropriate position for piston (seal)
replacement.
The pistons are not in the appropriate position for normal
operation (for example, after piston (seal) replacement) or an
error occurred during internal maintenance (→ page 142).
In both cases, the following message appears on the pump
display "Undock err., open purge valve". A similar message
appears in the Chromeleon Audit Trail.
To resolve the problem:
1. Open the purge valve.
2. Perform the Dock Pistons command.
3. Close the purge valve.
Operating Instructions