
Model 415C & 415SGS Instruction Manual
D01669102
April 2019, Revision A
46
Symptom
Cause
Remedy
Erratic motor speed
control.
Outer Mag-Drive Housing
not tight on motor shaft
Disassemble and tighten mag-drive
housing using HEXAGONAL wrench.
Worn out magnetic drive
outer rotator.
Check rotator for excessive run out or
wobble with motor running. Replace if
necessary.
Pressure Differential in
cylinder
Ensure inner magnetic drive housing
and slurry head are properly assembles
and paddle rotates freely.
Heater will not get
hot.
Blown fuse.
Check fuses inside electrical box.
Replace any that are blown.
Loose heater wire.
Check heater terminals for loose wires
and reconnect if necessary.
Faulty heater.
Replace.
Faulty solid state relay.
Replace.
Temperature display
is erratic.
Faulty thermocouple.
Replace thermocouple.
Loose connection in
thermocouple wiring.
Check for loose wiring and correct if
necessary.
Temperature
displays unusually
high /low number.
Open circuit in
thermocouple.
Replace thermocouple.
Open circuit in thermocouple
circuitry
Check thermocouple circuitry for open
circuits or loose connections.
Temperature is
overshooting.
The instrument is optimized
for higher temperature
operation and may have
difficulty at temperatures just
above ambient.
Program a dual ramp instead of one
single ramp. Also check the supplied
voltage to the machine as higher or
lower voltages may affect operation.
Temperature is
lagging behind.
Supply voltage too low.
Cooling water solenoid leak.
Air gap.
Check the line voltage to the
instrument. If the voltage is too low,
then this will affect heat rate.
Check the cooling water solenoid is not
leaking water causing water to flow
into the heater.
Check that the pressure vessel is
making solid contact between the
inside of the heater and the outside of
the pressure vessel. If there is no
contact this will affect the heat rate.
Check the slurry cup height adjustment
ring is correctly installed. If upside
down, this will cause an air gap.
Consistency reading
is high when test is
Air trapped in mag drive.
Open the nut on the top of the mag
drive housing and bleed air bubbles.