Alarm Causes And Corrective Actions - horiba TW-150 Instruction Manual

8.2

Alarm Causes and Corrective Actions

Alarm Alarm
Item
No. description
Cell
temperature
00
adjustment
abnormality
Cell
temperature
01
adjustment
warming up
Temperature
02 compensation
abnormality
Cell wiper
03 operation
abnormality
Common
ADC
04 communication
abnormality
05 Leak
PIO
06 communication
abnormality
07 Power ON/OFF
Battery
08
abnormality
Cause
Connection failure in heater
temperature sensor or heater
Failure in temperature
sensor in measurement cell
Heater disconnection
Internal analog circuit board
failure
Waiting for cell temperature
adjustment to finish
Connection failure in residual
chlorine electrode
Failure in residual chlorine
temperature compensation
sensor
Operation abnormality
caused by foreign particles in
cell
Connection failure in motor
or photo sensor
Cell wiper motor failure
Failure in detection photo
sensor for cell wiper position
Connection failure in internal
analog circuit board
Internal analog circuit board
failure
Connection failure in inner
piping
Leaks in inner piping, parts
Leak in wiper-axis sealing
Connection failure in internal
I/O circuit board
Internal I/O circuit board
failure
Power disconnection caused
by a blackout
Clock backup battery
expiration
Corrective action
(*: Manufacturer service required)
Inspect heater temperature sensor
or heater connection.*
Replace heater temperature
sensor.*
Replace heater.*
Replace internal analog circuit
board.*
This is not abnormal condition.
(Cell temperature adjustment
takes approximately 20 minutes to
become stable.)
Inspect residual chlorine electrode
connection.
Replace residual chlorine
electrode.
Clean turbidity/color cell, remove
foreign particles.*
Inspect motor or photo sensor
connection.*
Replace cell wiper motor*
Replace detection photo sensor
for cell wiper position.*
Inspect connection between
internal analog and CPU circuit
boards.*
Replace internal analog circuit
board (TW-ADC-01).*
Inspect inner piping connection.*
Replace inner piping or parts.*
Replace parts.*
Inspect connection between
internal I/O and CPU circuit
boards.*
Replace internal I/O circuit board
(TW-PIO-01).*
This is not abnormal condition.
Replace clock backup battery.*
8 TROUBLESHOOTING
Reference
page 142
151