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Alarm
Alarm
Item
No.
description
Light source
14
abnormality
15
Zero calibration
Turbidity
16
Span calibration
Analyzer
17
abnormality
Concentration
20
Color
upper limit
Cause
Degradation or failure in
turbidity light source (LED)
Detector failure
Internal analog circuit board
failure
Connection failure in light
source or detector
Degradation in zero water
filter
Mismatching calibration
solution
Blockage in calibration
solenoid valve
Detector failure
Mismatched calibration
results
Mismatching calibration
solution
Blockage in calibration
solenoid valve
Detector failure
Degradation in zero water
filter
Mismatched calibration
results
Dirt in turbidity/color cell
Detector failure
Internal analog circuit board
failure
Air bubbles in turbidity/color
cell
Sample water abnormality
Mismatched calibration
results
Dirt in turbidity/color cell
Detector failure
Corrective action
(*: Manufacturer service required)
Readjust or replace turbidity light
source.*
Replace detector.*
Replace internal analog circuit
board (TW-ADC-01).*
Inspect light source or detector
connection.*
Replace filter cartridge.
Replace calibration solution and
reexecute calibration.
Replace calibration solenoid
valve.*
Replace detector.*
Reset calibration value and
reexecute calibration.
Replace calibration solution and
reexecute calibration.
Replace calibration solenoid
valve.*
Replace detector.*
Replace filter cartridge.
Execute calibration.
Clean turbidity/color cell.*
Replace detector.*
Replace internal analog circuit
board (TW-ADC-01).*
Perform auto cleaning.
Manually analyze sample water.
Execute calibration.
Clean turbidity/color cell.*
Replace detector.*
8 TROUBLESHOOTING
Reference
page 141
page 42
page 42
page 141
page 42
page 105
page 31
153
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