TROUBLE DIAGNOSIS
CLAIMS. |
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| CAUSES AND CHECK POINTS. | HOW TO CHECK | |||||
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3. Refrigeration | 4) No cooling air circulation. |
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is weak. |
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| Faulty fan motor. |
| Fan is |
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| Fan shroud contact. - Clearance. |
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| constrained. |
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| Damping evaporator contact. |
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| Accumulated residual frost. |
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| Small cooling air |
| Insufficient |
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| Fan overload. - Fan misuse. |
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| discharge. |
| motor RPM |
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| Bad low termperature RPM characteristics. |
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| Rated power misuse. |
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| Faulty fan. |
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| Low voltage. |
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| Fan misuse. |
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| Bad shape. |
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| Loose connection. - Not tightly connected. |
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| Insert depth. |
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Shorud. Bent.
Ice and foreign materials on rotating parts.
5)Compressor capacity. Rating misuse. Small capacity. Low valtage.
6) | Refrigerant |
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| Malfunction of charging cylinder. |
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| too much or too little. |
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| Wrong setting of refrigerant. |
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| Insufficient compressor. - Faulty compressor. |
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7) | Continuous operation |
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| - No contact of temperature controller. - Foreign materials. |
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| ■ Check visually after | ||||||||||
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| disassembly. |
8) | Damper opens continuously. |
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| Foreign materials |
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| P/U liquid dump. | ■ Check visually after | ||
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| jammed. |
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| EPS water sediment. | disassembly. | ||
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| Screw. |
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| Failed sensor. - Position of sensor. |
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| Characteristics |
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| Bad characteristics of its own temperatue. |
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| of damper. |
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| Parts misuse. |
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| Charge of temperature - Impact. |
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| characteristics. |
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9) | Food storing place. - Near the outlet of cooling air. |
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- 49 -