ITW Dynatec DYNAMELT D15 Series - Page 226

Page 8 ITW Dynatec
Rev.10.15 Appendix Pumps
Troubleshooting
Problem Possible Cause Solution
Pump leaks
Screws not tight.
Re-torque screws to recommended
tightening torque.
Seal scratched or worn.
Replace seal.
Pump will not turn.
1. Low pump temperature.
Check temperature sensor and control
loop for proper setting/ operation.
Allow sufficient heat-up time.
2. Drive malfunction.
Verify drive is powered.
Check to assure all alarm circuits are
clear.
Check drive motor current and speed
settings.
Check all drive couplings.
3. Process conditions
changed.
Check process conditions for proper
melt temperature, pressures, viscosities
and materials.
4. Foreign particle.
Send pump for repair to ITW Dynatec.
5. Possible internal
damages.
Send pump for repair to ITW Dynatec.
Excessive seal assembly
leakage
1. Worn seal plate.
Send pump for repair to ITW Dynatec.
2. Low temperature pump
start.
Increase temperature. Allow heat soak
time.
3. Worn lip seal.
Replace lip seal.
Reduced pump efficiency /
Error with pump delivery
1. Worn gears/ bearings/
plates.
Send pump for repair to ITW Dynatec.
2. Process conditions
changed:
• Low inlet pressure
(cavitation).
• High outlet pressure
(slippage).
Check and adjust the recommended
process conditions.