P11
9.2 Trouble shooting
Problem
Corrective Action
Cannot power up
Check power line connection and make sure the power source
connection is correct.
Digit display shows nothing or
doesn’t fully display
Check fuse or Digit display out of function
Incorrect ORP/ pH reading
Check probe connections;
Run zero and probe calibration;
Replace probes
Relay out of function; dosing
pump does not run
Check dosing pump connection and power of controller
；
Check the power and voltage of dosing pump is correct and
match with the controller.
pH probe calibrate incorrect, pH
digit display shows“--- Er ”
。
Check probe connections;
Run zero and probe calibration;
Measurement error
，
digital
display will show tES EE”
Check all connections
Restart the unit
