Chapter 8
Troubleshooting
DM55 DynaDrum PP V6, Manual No.21-18, Rev.2.19 Page 129
Chapter 8
Troubleshooting
8.1 Troubleshooting Notes
Please re-read all security advices given in chapter 2 before troubleshooting.
All troubleshooting or repair procedures must be performed by qualified, trained
technicians.
The temperatures measured on the outer surface may deviate significantly from the
temperatures set and displayed. This can lead to a false conclusion (e.g. defective
heating). Such a difference is normal and depends also largely on the materials used.
In general: If failure occurs, check first:
• Check all the electrical and pneumatic connections.
• Verify that the main power switch of the unit is ON.
• Verify that the pump is functioning and the application heads have the required air
pressure.
• Verify that the temperature controller is in operation and that the set points are correct
for the Melter, Heated Hoses, Applicator and all other components connected to the
unit.
• Check to see if all components are heating properly.
Verify the following before proceeding in troubleshooting:
1. The equipment is switched on.
2. The equipment is supplied with power.
3. The equipment is supplied with clean, dry pneumatic air.
4. Pneumatic and electrical connections are correct.
5. A drum is loaded into the Bulk Melter and there is adhesive in it.
Hose/ Valve Heater Troubleshooting Tip
Hose or valve heater (or applicator if applicable) problems can be isolated by electrically
connecting the valve heater and hose to the alternate socket on the Bulk Melter. If the
malfunction goes with the valve heater and hose, the problem will usually be in the valve
heater or hose that was moved. If the malfunction does not move with the valve heater
and hose, the problem is probably in the Bulk Melter.
High-Temperature Redundant Overtemp Thermostat
The Bulk Melter includes a mechanical (redundant) overtemp thermostat that acts as a
safety backup. If the unit’s manifold temperature should exceed 232°C (450°F), the
thermostat will cause the Bulk Melter’s circuit breaker to open and power to the manifold,
platen, valve heater and hose(s) will be cut off. The mechanical thermostat automatically
re-sets after the manifold temperature falls below 204°C (400°F).
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