Chapter 6: Troubleshooting
6-1 Introduction
The utmost in safety precautions should be observed at all times when working on or around the machine and the electrical components. All normal
The use of good quality test equipment cannot be
Before making haphazard substitutions and repairs when defective electrical components are malfunctioning, we recommend that you check the associated circuitry and assemblies for other defective devices. It is common to replace the obviously damaged component without actually locating the real cause of the trouble. Such hasty substitutions will only destroy the new component. Refer to wiring diagrams and schematics.
Locating mechanical problems, should they occur, is relatively straightforward. When necessary, refer to the parts catalog section.
| Problem |
| Possible cause |
| Corrective action |
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| Undersized connectors/lines. |
| Increase size of connectors/ |
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| water lines. | |
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| |
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| Long connecting lines between |
| Move the unit closer to the mold |
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| unit and mold. |
| and shorten connecting lines. |
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| Serpentine flow through mold. |
| Connect lines for parallel flow |
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| instead of series flow. | |
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| Blocked line in mold. |
| Check mold for metal chips or |
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| deposits. Clean mold. | |
| Temperature fluctuations/rapid |
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| |
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| Quick disconnect fitting with |
| Remove and replace fitting or | |
| cycling from hot to cold. |
| check valve. |
| valve. |
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| Carbon |
| Clean or replace affected piping. |
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| or fittings. |
| Replace fluid. |
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| Check unit by opening the |
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| Faulty TCU. |
| manual bypass to determine if |
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| the TCU contols the set point | |
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| temperature. |
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| Reversed probes. |
| Switch Return and Delivery |
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| probes. | |
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Upright Portable Hot Oil TCUs | Chapter 6: Troubleshooting | 36 |
