ABB Endura APA592 Operating Instruction page 76

Endura APA592
pH / Redox (ORP) transmitter
Diagnostic Message
[Sub-error Message]
M026.024
Non-volatile
memory burn error
M052.037
Sensor diagnostic
signal input error
[Glass diag signal
input error]
M054.012
High reference
electr. impd.
M056.002
Ref impedance
input error
M058.018
Snsr factory
cal data corrupt
Table 8.2 Diagnostic Messages (Continued)
74
Possible Cause(s)
[Related Condition]
Writing to the electronic non-Volatile
Memory was not successful.
[ELECTRONICS]
Glass diagnostic signal related
sensor board electronics
malfunction.
[ELECTRONICS]
Reference electrode impedance is
higher than the user set limit
[SENSOR]
Sensor reference diag signal related
sensor board electronics
malfunction.
[ELECTRONICS]
Sensor factory calibration data
corrupt or missing.
[ELECTRONICS]
8 Troubleshooting and Diagnostics
Corrective Action
Replace the electronics as soon as possible.
If the sensor does not support diagnosis, disable
the sensor diagnosis feature – see page 63.
If the problem persists, contact factory.
Verify sensor wiring.
Verify sensor wiring is free of nicks, cuts, breaks
and/or open connections.
Verify configuration settings are correct.
Ensure diagnostics is set to OFF if the sensor
does not have a solution ground connection.
Verify reference electrode is clean.
Remove any foreign material.
Verify sensor responds to pH buffers.
Contact factory.
Contact factory.
OI/APA592–EN Rev. E