horiba TW-150 Instruction Manual page 180

8 TROUBLESHOOTING
Alarm Alarm
Item
No. description
Concentration
21
lower limit
Concentration
22 device upper
limit
Color
Concentration
23 device lower
limit
Light source
24
abnormality
154
Cause
Sample water abnormality
Degradation in zero water
filter
Mismatched calibration
results
Dirt in turbidity/color cell
Detector failure
Sample water abnormality
Mismatched calibration
results
Dirt in turbidity/color cell
Detector failure
Internal analog circuit board
failure
Sample water abnormality
Degradation in zero water
filter
Mismatched calibration
results
Dirt in turbidity/color cell
Detector failure
Internal analog circuit board
failure
Degradation or failure in
turbidity light source (LED)
Detector failure
Internal analog circuit board
failure
Connection failure in light
source or detector
Corrective action
(*: Manufacturer service required)
Manually analyze sample water.
Replace filter cartridge.
Perform calibration.
Clean turbidity/color cell.*
Clean turbidity/color cell.*
Replace detector.*
Manually analyze sample water.
Perform calibration.
Clean turbidity/color cell.*
Replace detector*
Replace internal analog circuit
board (TW-ADC-01).*
Manually analyze sample water.
Replace filter cartridge.
Perform calibration.
Clean turbidity/color cell.*
Clean turbidity/color cell.*
Replace detector.*
Replace internal analog circuit
board (TW-ADC-01).*
Readjust or replace turbidity light
source.*
Replace detector.*
Replace internal analog circuit
board (TW-ADC-01).*
Inspect light source or detector
connection.*
Reference
page 141
page 31
page 31
page 141
page 31