a)Continuous
The evaporator fan runs constantly (except in defrost). The frame heaters are on continuously.
b)Energy Saving
The evaporator fan runs when the compressor is on, but only intermittently when the compressor is off. The frame heaters cycle on and off with the evaporator fan for refrigerators auxiliary code Q6 and later, but are on continuously for refrigerators auxiliary code Q5 and earlier and all freezers. Intermittent fan operation saves energy by reducing heat leak, especially around the gasket, and by extending compressor off time. Fan on/off time is dependent on the setpoint temperature.
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| Off Time | On Time | |
Model | Setpoint Temperature | (seconds) | (seconds) | |
| 23 to 30°F | 90 | 15 | |
| ||||
Refrigerator |
|
| ||
32 to 52°F | 150 | 15 | ||
| ||||
| (0 to 11°C) | |||
|
|
| ||
Freezer | 30 | 30 | ||
|
|
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c) Automatic Corrections Made During Energy Saving Operating Mode
(1) Temperature Display Correction
When the unit is in energy saving mode and the evaporator fan shuts off, the temperature at the cabinet thermistor drops due to its close proximity to the evaporator. Therefore, the temperature at the cabinet thermistor does not accurately reflect the true cabinet temperature. To compensate for this, the cabinet temperature registered at compressor shutoff is displayed for 120 seconds after shutoff when in energy saving mode. After 120 seconds, the cabinet temperature plus 1.8°F (1°C) will be displayed. Once the compressor turns back on, the display will return to the normal display.
(2) Temperature Differential Correction
During energy saving mode, the cabinet temperature tends to be higher than during normal operation because the evaporator fan operates only intermittently when the compressor is off. The upper setpoint differential for turning the compressor on is automatically adjusted to compensate.
E. Perimeter Frame Heater
This unit is equipped with a perimeter frame heater. This prevents the formation of condensate on the front frame of the unit under high humidity conditions.
Note: On refrigerators with auxiliary code Q6 and later, perimeter frame heater(s) operate together with the evaporator fan(s).
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