Gree GUHD series - Page 98

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Malfunction display: F5 Failure of Indoor Room Sensor at Wire Controller
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2.2.1Brief Introduction to the Electric Control Box of the Outdoor Unit .(Applicable to 09~12K)
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2. Testing Method to the Key Points on the Outdoor Unit’s Electric Control Box
2.1Test Points and Testing Method of 15V/12V/5V Power Supplies.