horiba TW-100, Instruction Manual

Page: 154 / 175

8 TROUBLESHOOTING
142
8.2 Alarm Causes and Corrective Actions
Alarm
No.
Item
Alarm
description
Cause
Corrective action
(*: Manufacturer service required)
Reference
00
Common
Cell
temperature
adjustment
abnormality
Connection failure in heater
temperature sensor or heater Inspect heater temperature sensor
or heater connection.*
Failure in temperature
sensor in measurement cell Replace heater temperature
sensor.*
Heater disconnection Replace heater.*
Internal analog circuit board
failure Replace internal analog circuit
board.*
01
Cell
temperature
adjustment
warming up
Waiting for cell temperature
adjustment to finish
This is not abnormal condition.
(Cell temperature adjustment
takes approximately 20 minutes to
become stable.)
02
Temperature
compensation
abnormality
Connection failure in residual
chlorine electrode Inspect residual chlorine electrode
connection.
page 133
Failure in residual chlorine
temperature compensation
sensor
Replace residual chlorine
electrode.
03
Cell wiper
operation
abnormality
Operation abnormality
caused by foreign particles in
cell
Clean turbidity/color cell, remove
foreign particles.*
Connection failure in motor
or photo sensor Inspect motor or photo sensor
connection.*
Cell wiper motor failure Replace cell wiper motor*
Failure in detection photo
sensor for cell wiper position Replace detection photo sensor
for cell wiper position.*
04
ADC
communication
abnormality
Connection failure in internal
analog circuit board
Inspect connection between
internal analog and CPU circuit
boards.*
Internal analog circuit board
failure Replace internal analog circuit
board (TW-ADC-01).*
05 Leak
Connection failure in inner
piping
Inspect inner piping connection.*
Leaks in inner piping, parts Replace inner piping or parts.*
Leak in wiper-axis sealing Replace parts.*
06
PIO
communication
abnormality
Connection failure in internal
I/O circuit board
Inspect connection between
internal I/O and CPU circuit
boards.*
Internal I/O circuit board
failure Replace internal I/O circuit board
(TW-PIO-01).*
07 Power ON/OFF
Power disconnection caused
by a blackout
This is not abnormal condition.
08
Battery
abnormality Clock backup battery
expiration
Replace clock backup battery.*