Liquiline System CA80AL
Diagnostics and troubleshooting
Hauser
129
No.
Message
Factory settings
Tests or remedial action
S
D
F
976
PFM/PWM value high
S
On
Off
Pulse frequency modulation: output signal
exceeded/undershot. Measured value outside the
specified range.
• Sensor in air
• Air pockets in assembly
• Incorrect flow to sensor
• Sensor fouled
1.
Clean sensor
2.
Check plausibility.
3.
Adjust the PFM configuration.
977
PFM/PWM value low
S
On
Off
978
ChemoClean Failsafe
S
On
On
No feedback signal detected within the configured
period.
1.
Check application.
2.
Check wiring.
3.
Extend the duration.
990
Deviation limit
F
On
On
Redundancy: limit value of percentage deviation
exceeded
991
CO2 conc. range
F
On
On
CO
2
concentration (degassed conductivity) outside
the measuring range
992
pH calculation range
F
On
On
pH calculation outside the measuring range
993
rH calculation range
F
On
On
rH calculation outside the measuring range
994
Difference conduct.
F
On
On
Dual conductivity outside the measuring range
1)
Status signal
2)
Diagnostic message
3)
Failure current
11.6.2 Sensor-specific diagnostic messages
Operating Instructions "Memosens", BA01245C
11.7 Pending diagnostic messages
The Diagnostics menu contains all the information on the device status. Furthermore,
various service functions are available.
The following messages are directly displayed every time you enter the menu:
• Most important message
Diagnostic message recorded with the highest criticality level
• Past message
Diagnostic message whose cause is no longer present.
All the other functions in the Diagnostics menu are described in the following chapters.
11.8 Diagnostics list
All the current diagnostic messages are listed here.
A time stamp is available for each message. Furthermore, the user also sees the
configuration and description of the message as saved in
Menu
/
Setup
/
General settings
/
Extended setup
/
Diagnostics settings
/
Diag. behavior
.
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