8.1.1 System error messages
Fault mes‐
sage
Possible cause Measure
[MA]
4 ... 20 mA circuit open Check cabling
[DESC]
Drying agent saturated Exchange drying agent. Refer
to
Ä Chapter 6.1 „Load drying
agent“ on page 30
[LAMP]
Lamp failure Exchange lamp. Contact cus‐
tomer service
[FLOW]
Flow interrupted Establish flow
[CLN]
Cuvette ultrasound trans‐
ducer has no contact
Rotate the cuvette slightly in
order to improve contact.
Exchange the cuvette if the
problem persists.
Cuvette removed Insert cuvette
[FAIL]
Fatal system errors Contact customer service
8.1.2 Faults in the process
Fault Possible cause Process error
Displayed
values higher
than expected
Air bubbles in the
sample water
Ensure that the outlet bleed valve is
open and not blocked
Create backpressure
Install air bubble trap, accessories,
order number 1037790
Condensate or cuvette
not airtight
Check cuvette for condensate or
leaks
Cuvette soiled Clean cuvette
Maintenance, troubleshooting and repair
67
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