Endress+Hauser Liquiline CM44P - Page 156

Diagnostics and troubleshooting Liquiline CM44P
156 Endress+Hauser
No. Message Factory settings Sensor
type
Tests or remedial action
S
1)
D
2)
F
3)
740 Sensor defective F On On CLS82D Internal electrode failure
1. Replace sensor.
2. Contact the Service Department.
771 Lamp change F On Off N, T, S Lamp change alarm
Configured operating time has been
reached
1. Replace lamp.
2. Contact the Service Department.
772 Lamp change M On Off Phot Lamp change warning
Possible reasons: remaining lamp
intensity low, lamp service life was not
reset after lamp replacement
1. Replace lamp and reset lamp
service life.
2. Contact the Service Department.
773 Lamp change F On On Phot Lamp change alarm
Possible reasons: remaining lamp
intensity low, lamp service life was not
reset after lamp replacement
1. Replace lamp and reset lamp
service life.
2. Contact the Service Department.
774 Lamp defective F On On Phot Possible reasons: cable defective, lamp
defective
1. Check cable.
2. Replace lamp.
3. Contact the Service Department.
832 Temp. range
exceeded
S Off Off All except
U
Outside temperature specification
1. Check application.
2. Check temperature sensor.
841 Operating range S Off Off All Process value outside operational range
1. Check application.
2. Check sensor.
842 Process value S Off Off P Process limit value exceeded/undershot
Reasons: sensor in air, air pockets in
assembly, incorrect flow to sensor, sensor
defective
1. Change process value.
2. Check electrode system.
3. Change sensor type.
843 Process value S Off Off P
844 Process value S Off Off N, T, S Measured value outside specified range
Reasons: sensor in air, air pockets in
assembly, incorrect flow to sensor, sensor
defective
1. Increase process value.
2. Check electrode system.
3. Change sensor type.