Press the TEST button on the MAIN PWB to start the test mode.
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Pressing the TEST button one time will turn on the compressor, all fan motors, all dampers, and all items on the display. |
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Pressing the TEST button a second time will force the damper closed. The display will show 22 22. |
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Pressing the TEST button a third time will force the defrost mode. The display will show 33 33. |
The microprocessor sends a signal to the fan motor and checks its status. If there is no feedback, the motor is stopped for 10 seconds and then powered again for 15 seconds. To determine if there is a fan malfunction, this process is repeated three times before an error code is displayed. The error code will be displayed for 30 minutes, after which the process will repeat. If normal operation is restored, the error message is cleared and the microprocessor is reset automatically.
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