1)Check the dip switch settings to assure that S1 dip switch 3, 4, 7, 8, 9 & 10 and S2 dip switch 1 through 6 are in the factory default position. S1 dip switch 1, 2, 5, & 6 are cleaning adjustments and the settings are flexible.
2)Move the control switch to the “ICE” position and check for proper control voltage. If the “POWER OK” LED is on, the control voltage is good. If the “POWER OK” LED is off, check the control transformer circuit. If no voltage is present, check the power supply circuit.
3)To perform a relay sequence test, turn on the power switch while pressing the “OUTPUT TEST” button. The correct lighting sequence should be 5, 6, 7, 8, 9, 4. Some components (e.g., the compressor) will cycle during test. Each LED comes on for 5 seconds. LED 5 is on while LED 6 is on. Following the output test sequence, the icemaker will resume normal operation beginning with the 1 minute fill cycle.
[e] CONTROL BOARD REPLACEMENT
The dip switches should be adjusted to the factory default settings as outlined in this manual.
4. THERMISTOR
A thermistor (semiconductor) is used as a harvest control sensor and
Temperature (°F) | Temperature (°C) | Resistance (kΩ) |
0 | 14.401 | |
10 | 10.613 | |
32 | 0 | 6.000 |
50 | 10 | 3.871 |
70 | 21 | 2.474 |
90 | 32 | 1.633 |
Check a thermistor for resistance by using the following procedure:
1)Disconnect the connector K1 on the board.
2)Remove the thermistor. See “V. 17. THERMISTOR”.
3)Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes.
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