SOR Single Point Ultrasonic Level Switch - Manual (Page 8)

8/16 Form 841 (08.13) ©SOR Inc.
Troubleshooting
Symptom/Problem Possible Cause Corrective Action
No current in the
loop
No LEDs lit
1. Power supply turned off.
2. Improperly wired terminal
block TB1.
3. Broken power supply wire. 1. Check power supply source.
2. Check terminal block wiring
per
.
3. Check loop wire integrity.
Current is greater
than 20mA 1. Incorrectly wired circuit 1. Check current loop wiring
per
.
Current is 8mA
when 16mA is
expected or
current is 16mA
when 8 mA is
expected. 1. Wet probe switch is in the
wrong position.
2. Time Delay has not timed
out (units with DT accessory
only). 1. Set wet probe switch to
proper position.
2. Check time delay switches
and wait for timeout or set
new timeout or cycle power
(turn off power then turn it
back on.)
If corrective action is not effective, please consult the factory.
NOTE: Agency certifi ed units, (FM, CSA, IEC) must be returned to SOR for repairs.
Sensor Replacement

Disconnect power to the unit.

Remove the housing cover.

Slide out PC board to expose the sensor connections J1 and J2. (See )

Disconnect the sensor wires from J1 and J2.

Unscrew the sensor from the housing.

Apply thread sealant to the male threads of the new sensor.

Thread the new sensor into the bottom of the housing.

Connect one sensor wire into the J2 mini-phono jack on the circuit board.

Connect the other sensor wire into the J1 miniphone jack on the circuit board.

Slide the PC board into the grooves in the plastic ring inside the housing.
Reconnect power and replace the housing cover.
Replacement Sensors
See Form 973 Ultrasonic Catalog for replacement sensor model numbers.