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8 TROUBLESHOOTING
146
25
Color
Zero calibration
Degradation in zero water
filter
Replace filter cartridge.
Mismatching calibration
solution
Replace calibration solution and
reexecute calibration.
Blockage in calibration
solenoid valve
Replace calibration solenoid
valve.*
Detector failure
Replace detector*
26
Span calibration
Mismatched calibration
results
Reset calibration value and
reexecute calibration.
Mismatching calibration
solution
Replace calibration solution and
reexecute calibration.
Blockage in calibration
solenoid valve
Replace calibration solenoid
valve.*
Detector failure
Replace detector*
27
Analyzer
abnormality
Degradation in zero water
filter
Replace filter cartridge.
Mismatched calibration
results
Perform calibration.
Dirt in turbidity/color cell
Clean turbidity/color cell.*
Detector failure
Replace detector.*
Internal analog circuit board
failure
Replace internal analog circuit
board (TW-ADC-01).*
30
Residual
chlorine
Concentration
upper limit
Sample water abnormality
Manually analyze sample water.
Inappropriate flow rate
Check the flow rate.
Mismatched calibration
results
Perform calibration.
Inappropriate applied voltage Set appropriate applied voltage.
Electrode failure
Polish residual-chlorine sensor
or
Replace residual-chlorine sensor.
Internal analog circuit board
failure
Replace internal analog circuit
board (TW-ADC-01).*
31
Concentration
lower limit
Sample water abnormality
Manually analyze sample water.
Inappropriate flow rate
Check the flow rate.
Mismatched calibration
results
Perform calibration.
Inappropriate applied voltage Set appropriate applied voltage.
Electrode failure
Polish residual chlorine sensor
or
Replace residual-chlorine sensor.
Internal analog circuit board
failure
Replace internal analog circuit
board (TW-ADC-01).*
Alarm
No.
Item
Alarm
description
Cause
Corrective action
(*: Manufacturer service required)
Reference
Summary of Contents for TW-100
Page 1: ...Water Distribution Monitor TW 100 Instruction Manual CODE GZ0000080187H ...
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