Magnum Venus Plastech CFH-4000 User Manual
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CFH-4000 IN-LINE RESIN HEATER MANUAL
TROUBLESHOOTING INSTRUCTIONS
Two basic problems may occur with the MVP Resin Heater:
Loss of electrical current or heat
Material flow blockage or leakage.
Loss of Electrical Current or Heat:
1. Indicator Light: If indicator light is not sequencing during operation, try preheat
button to see if light comes on. If not, inspect bulb and replace if defective. Also,
check diodes for continuity. If light does not operate and no heat is generated in the
heater and diodes are OK, then
DISCONNECT POWER FROM THE UNIT.
2. Fuses: Remove lid to electrical enclosure and check all fuses to insure they have
not blown out. If so, replace.
3. Loose Wire: Check all connections for loose or disconnected terminals.
4. Rheostat: NOTE: Air must be ON for rheostat check. If rheostat controlled function
is not working, disconnect wires and check continuity through rheostat when it is cool.
If there is continuity-
check that it’s getting current from normally open contacts of
microswitch. If no continuity through rheostat, it is faulty and must be replaced. If
neither preheat or thermostat function works, check fuses first, then make sure pilot
light is not burned out (remove bulb and inspect).
5. Thermal Limiter: Once fuses and rest of circuit has checked out, disconnect wires
and check continuity through thermal limiter when it is cool. If there is no continuity
through switch when cool (room temp. 70° F) it is faulty and must be replaced.
Heat limiter may be adjusted to trip at different levels and may need readjustment.
MVP factory setting is to trip at approx. 120° F.
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