JUMO AQUIS 500 RS, Operating Manual, Page: 90 / 120

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10 Remedying errors and malfunctions
10.1 General error messages
Problem/error message Possible cause Measure
No measured value dis-
play or
current output No voltage supply Check voltage supply
Measured value display
0000 or
current output 4 mA Sensor not submerged
in medium
Container level too low Top-up container
Flow fitting blocked Clean flow fitting
Sensor measurand
unsuitable or sensor faulty Clean sensor
Replace sensor
Incorrect or
unstable
measured value display Sensor measurand
unsuitable Clean sensor
Calibrate sensor
Replace sensor
Sensor not positioned correctly Select different installation loca-
tion
No through-mixing Ensure homogeneous medium.
Ensure sensor has
rinsing flow on all sides
Air bubbles disrupt the measure-
ment Optimize mounting
Measured value display
8888,
Temperature display "ok",
flashing Overrange Select suitable measuring range
Connected sensor faulty Replace connected
sensor
Measured value display
8888,
Temperature display 8888
flashing Temperature overrange or under-
range The temperature of the medium
must be within the admissible
range.
Replace sensor
Temperature probe short circuit or
open circuit Replace sensor or cable
Line break Replace sensor or cable
No sensor connected Connect sensor
Configure sensor on device
Short circuit
- Cable
- Sensor
- Terminals Check cables and connections.
Replace sensor.
Temperature too high Keep within admissible range