Lutz Jesco EASYPRO, Operating

Page: 49 / 64

Fault resolution
49
Subject to technical changes.
200114 BA-42820-02-V03
Water sampling station
EASYPRO
Operating instructions
12 Fault resolution
See below for information about how to rectify faults on the control product or the system. If you cannot eliminate the fault, please consult with the man-
ufacturer on further measures or return the product for repair.
Fault Possible causes Measures for resolution
Balls in the disinfection
measuring cell rotate too
weakly or float does not
float
Water inflow pressure too low
n
Lay sample water line with larger cross-section.
n
Installation of a sample water pump.
Sample water filter soiled Clean or replace the filter sieve.
The float floats but the reed
switch does not switch upon
connection.
Harmonisation between the float and reed
switch is incorrect.
Calibrate reed switch
Reed contact defective Replace reed contact
Display fluctuates during
the excess chlorine
measurement of the
connected measurement
amplifier
Fluctuating pH value influences the chlorine
measurement Stabilise the pH value in the water
(e.g. optimise control path, controller parameters)
“Sample water shortage”
display on the measurement
device.
Reed switch in the flow control defective Replace reed switch
Inflow tap closed
Open the inflow tap (Fig. 2 „Water sampling station EASYPRO 4“ on
page 10, pos. 5).
The sample water inflow is soiled.
Check the visible parts and filter (Fig. 2 „Water sampling station
EASYPRO 4“ on page 10, pos. 3) for soiling and clean if necessary.
The LEDs are continually
red. The controller does not control the LEDs
correctly. Comply with the instructions in section8.3.2.6 „Actuation of the LEDs
for the water sampling stations“ on page 34.
Measured value fluctuates
constantly
Loose measurement cable connections Check measurement cable; re-attach if necessary
The measurement is very
slow.
Diaphragm blocked Clean electrode
Electrode becoming obsolete Replace electrode
Buffer solution becoming obsolete Check the expiration date and replace if necessary.
The measurement deviates
or is unstable
Measuring cell defective Replace measuring cell
Diaphragm is dry and/or soiled Clean measuring cell
The display deviates by a
constant value
Measuring cell not correctly installed Check correct installation; check correct calibration
External potential in the system
Remove the external potential or set the offset (see chapter 9.5.2.3
„Offset compensation“ on page 38).
TOPAX
®
MC
controller
constantly displays pH value
"7.00". Short circuit Check measuring cell for damage and replace if necessary
No reaction to pH buffer
solution
Measuring cell not correctly installed Check correct installation; check correct calibration
Measuring cell defective Check measuring cell for damage and replace if necessary
Value for "free chlorine"
fluctuates heavily
pH-value instability Check pH value measurement
Tab. 43: Troubleshooting
EASYPRO