Water Monitoring System
User Manual
Page
66
of 82
Ver. 1.1 – Revision March 2022
10.
Troubleshooting
For troubleshooting of the system, please refer to the PI diagram of each
system.
Troubleshooting should always be carried out by skilled personnel.
WARNING/ATTENTION
Electrocution hazard
The water monitoring system is connected to hazardous electric voltages,
which can cause personal injury or mechanical damage if not handled
correctly and in accordance with normal safety regulations.
10.1 General troubleshooting
Trouble
Possible Cause
Action
Electrical
Display is dead
Circuit breaker
Power supply
Check the circuit breaker
Check power supply – the
power supply needs to be at
correct voltage
Check the electrical wiring
Display screen
shows nothing
despite power
supply and circuit
breaker are OK
Display is defective Replace the display
Communication error
The system cannot
find the HMI.
Faulty ethernet port
Faulty ethernet
cable
Check communication cable
to HMI
Replace the HMI or PLC
pH module
Incorrect
indication of pH
value
Try to clean the sensor and
chamber manually
Try to validate the pH sensor
Change the pH electrode
