Evoqua WALLACE & TIERNAN GMS PLUS, Original Instruction Manual

Page: 92 / 116

92
WT.050.455.000.DE.IM.0319
Operation
GMS
plus
6.
Please note
The accuracy of the alarm function is not certain during the run-in
period.
Error diagnostics on
Chloratect sensors
Using a digital voltmeter, the DC voltages on the measuring cell
input can be measured (terminals 21 – 22 and 25 – 26). They are
used to trouble-shoot the sensors. The voltages are typical values
for appropriate zero balance currents:
• Cl
2
- and ClO
2
sensor at 1 µA: approx. 1.1 – 1.3 V=
• O
3
-sensor at 0.3 µA: approx. 0.35 – 0.45 V=
Please note
The sensor is defective or improperly enabled if the measured
voltage deviates from the specified values!
COMMON 1
COMMON 2
COMMON 3 red flashing or
constant Common alarm 1
active common relay 1
triggered Follow alarm plan. For "latched"
mode: After removing the cause,
clear with the
key or external
acknowledge key. Remove
cause of alarm.
See 4.3 “Alarms" on page 24.
Common alarm 2
active common relay 2
triggered
Common alarm 3
active common relay 3
triggered
SENSOR
red constant Sensor current too low
or too high Replenish the electrolyte in the
sensors.
Check the µA signal in the menu
Diagnosis.
Check the cable connection
between the sensors and the
GMS
plus .
Sensor not yet run in; calibrate
after run-in period.
For
"latched" mode: After
removing the cause, clear with
the
key or external
acknowledge key.
flashing Sensor alarm latched
Sensor current too low
or too high
Display Color Meaning Measures