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8.1.1 System error messages
Fault message Possible cause
Measure
[MA]
4 ... 20 mA circuit open
Check cabling
[DESC]
Drying agent saturated
Exchange drying agent. Refer to
[LAMP]
Lamp failure
Exchange lamp. Contact cus‐
tomer service
[FLOW]
Flow interrupted
Establish flow
[CLN]
Cuvette ultrasound transducer
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
Incorrectly calibrated
Calibration, see
Displayed
values incorrect
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
Maintenance, troubleshooting and repair
69