Troubleshooting – SOR Single Point Ultrasonic Level Switch User Manual
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Form 829 (08.13) ©SOR Inc.
Model No.
of 1 pt control
for metal notch
integral sensor
Replacement
Board
includes
hardware
Model No.
of 1 pt control
for metal notch
remote sensor
Replacement
Board
includes
hardware
Model No.
of 1 pt control
for viscous
sensor
Replacement
Board
includes
hardware
711K1-N-P6-C
5002-996
711R1-N-P6-C
5002-958
711K1-V-P6-C
5003-021
711K1-N-P7-C
5002-997
711R1-N-P7-C
5002-959
711K1-V-P7-C
5003-022
711K1-N-P8-C
5002-998
711R1-N-P8-C
5002-960
711K1-V-P8-C
5003-023
721K2-N-P6-C
5002-999
721R2-N-P6-C
5002-961
721K2-V-P6-C
5003-024
721K2-N-P7-C
5003-001
721R2-N-P7-C
5002-962
721K2-V-P7-C
5003-025
721K2-N-P8-C
5003-002
721R2-N-P8-C
5002-963
721K2-V-P8-C
5003-026
Model No.
of 2 pt control
for metal notch
integral sensor
Replacement
Board
includes
hardware
Model No.
of 2 pt control
for metal notch
remote sensor
Replacement
Board
includes
hardware
Model No.
of 1 pt remote
control for
viscous sensor
Replacement
Board
includes
hardware
712K3-N-P6-C
5003-003
712R3-N-P6-C
5002-964
711R1-V-P6-C
5003-015
712K3-N-P7-C
5003-004
712R3-N-P7-C
5002-965
711R1-V-P7-C
5003-016
712K3-N-P8-C
5003-005
712R3-N-P8-C
5002-966
711R1-V-P8-C
5003-017
722K3-N-P6-C
5003-006
722R3-N-P6-C
5002-967
721R2-V-P6-C
5003-018
722K3-N-P7-C
5003-007
722R3-N-P7-C
5002-968
721R2-V-P7-C
5003-019
722K3-N-P8-C
5003-008
722R3-N-P8-C
5002-969
721R2-V-P8-C
5003-020
Symptom
Possible Causes
Solutions
Sensor
Monitor
relay
de-energized
(Model 721,
722 only)
No power to unit
Restore power.
One or both sensor coax cable(s) unplugged
from PC board. Check sensor housing on
remote units.
Replug coax cables into the board according
to the Field Replacement procedure (page 11).
Internal or external damage to sensor.
Sensor damage can be verified using sensor
test procedure (page 13). If sensor tests
okay, replace circuit board according to field
replacement procedure (page 11).
Replace entire instrument or contact factory
for replacement sensor. The factory will
request model and serial numbers to provide
replacement sensor.
No response
to liquid level
No power to unit
Restore power.
Blown fuse
Replace fuse (page 13)
One or both sensor cable(s) unplugged
from PC board. Check sensor housing on
remote units.
Replug sensor cables into the board
according to the Field Replacement procedure
(page 11).
Internal or external damage to sensor.
Sensor damage can be verified using sensor
test procedure (page 8). If sensor tests
okay, replace circuit board according to field
replacement procedure (page 11).
Replace entire instrument or contact factory
for replacement sensor. The factory will
request model and serial numbers to provide
replacement sensor.
Troubleshooting
NOTE: Agency certifi ed units, (FM, CSA, IEC) must be returned to SOR for repairs.