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9
Malfunctions and troubleshooting
Personnel:
Protective equipment:
9.1
General troubleshooting and fault rectification
Fault description
No display
Date/time is not saved
Conductivity display is not stable
No post-proportioning despite under-
concentration
Pre-proportioning does not start
9.2
Fault messages
The acoustic alarm can be switched off by pressing any button on the front of
the unit. The alarm message on the display remains visible until the error has
been resolved.
n
Operator
n
Specialist
n
Service personnel
n
Trained personnel
n
Protective gloves
n
Protective eyewear
n
Safety shoes
Cause
LMI03 is not switched on
Connection transformer defective
Control PCB defective
Defective or empty CMOS battery
Air bubbles at the measuring cell
installation point
Proportioning lock input is not closed
Setpoint setting has changed
Product storage container is empty
Release signal 'PP start' not present
Proportioning lock also effective on pre-
proportioning (if configured)
Product storage container is empty
Pre-proportioning delay time set
69
Malfunctions and troubleshooting
Remedy
Switching on the LMI03
Replace the connection transformer
Replace WWC PCB
Replace WWC PCB
Check the installation scenario for air
bubbles or insufficient pipe filling.
Check the proportioning lock
connection on the unit and system.
Correct the setpoint setting
Check the contents level and level
detection device
Check the release signal at the
system
Check the proportioning lock signal
Check the contents level and level
detection device
Check the time setting, if necessary
MAN049432 Rev. 03-03.2024
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