2. EVAPORATOR IS FROZEN UP
PROBLEM |
| POSSIBLE CAUSE |
| REMEDY | ||||||
[1] Freeze cycle |
| a) Float Switch | 1. | Leads | 1. | Check and replace. | ||||
time is too |
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| defective switch. |
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long. |
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| 2. | Float does not move freely. | 2. | Clean or replace. | ||||
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| b) Water Solenoid | 1. | Diaphragm does not close. | 1. | Check for water leaks | ||||
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| Valve |
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| with icemaker off. | ||
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| c) Controller Board |
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| 1. Defective. | 1. | See “II.2[e] CHECKING | |||
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| CONTROLLER BOARD.” | ||
[2] All ice formed |
| a) Evaporator | 1. | Scaled up. | 1. | Clean. |
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on Evaporator |
| b) Water Supply Line | 1. | Water pressure too low. | 1. | Check and get | ||||
does not fall |
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| recommended pressure. | ||
into bin in |
| c) Water Solenoid | 1. | Dirty mesh filter or orifice. | 1. | Clean. | ||||
harvest cycle. |
| Valve | 2. | Diaphragm does not close. | 2. | Check for water leaks | ||||
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| with icemaker off. | ||
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| d) Ambient and/or | 1. | Too cool. | 1. | Increase temperature. | ||||
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| water temperature |
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| e) Line Valve | 1. | Continues to open in | 1. | Check operation in | ||||
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| harvest cycle. |
| harvest cycle and replace. | ||
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| f) Thermistor | 1. | Out of position or loose | 1. See “V. 11. REMOVAL | |||||
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| attachment.. |
| AND REPLACEMENT OF | ||
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| THERMISTOR.” | ||
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| g) Controller Board | 1. | Defrost Timer is set too | 1. | Adjust longer, referring |
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| short. |
| to “II. 2. [d] CONTROLS | ||
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| AND ADJUSTMENT, 2) | ||
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| Defrost Timer.” | ||
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| 2. Defective. | 2. | See “II. 2.[e] CHECKING | |||
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| CONTROLLER BOARD.” | ||
[3] Others |
| a) Spray Tubes |
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| 1. Clogged. | 1. Clean. | ||||
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| 2. | Out of position. | 2. | Place in position. |
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| b) Water System | 1. | Dirty. | 1. | Clean. | ||||
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| c) Refrigerant |
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| 1. Undercharged. | 1. | Check for leaks and | |||
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| recharge. | ||
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| d) Expansion Valve | 1. | Bulb out of position or | 1. | Place in position. | ||||
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| loose attachment. |
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| 2. Defective. | 2. | Replace. | |||
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| e) Hot Gas Solenoid |
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| 1. Coil winding opened. | 1. Replace. | ||||
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| Valve | 2. | Plunger does not move. | 2. Replace. | |||||
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| 3. | Wiring to Hot Gas Valve. | 3. | Check for loose | |||
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| connection or open, and | ||
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| replace. | ||
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| f) Water Supply Line | 1. | Too small; requires 3/8” | 1. | Increase Water Line size. | ||||
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| OD line dedicated per |
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| machine. |
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| g) Water Filter (if | 1. | Flow rate too small. | 1. | Replace with filter with | ||||
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| larger flow rate. | ||
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44
