Somat SPC-75S, Operation & Service Manual

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SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
Not enough
water in Pulper.
1. Water make up shut-
off valve closed.
2. Low water pressure
3. Faulty operation of
solenoid valve (see
equipment
schematic for
location).
1. Open valve.
2. Increase “POT 1” setting to increase pre-fill. Increase
“POT 2” setting to increase frequency of make-up
water
3. Check for loose electrical connections. If the valve
plunger is stuck or the coil is burned out, replace with
a new valve.
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
Too much water
in Pulper.
1. Trough valve open
too far
2. Misadjusted PLC
POT setting.
3. Faulty operation at
valve. (see
equipment
schematic for
location.)
4. Overflow fitting and
line clogged.
1. Throttle down valve to decrease water in pulper and
increase water in extractor (more overflow)
2. The PLC controls the circuit to the solenoid valve. Too
high a setting would tend to hold the solenoid valve
open too long letting too much water into the Pulper.
Adjust POT 2 to correct the problem.
3. Repair or replace solenoid valve.
4. Clean fitting and line.