A/A DC INVERTER U-MATCH AIR CONDITIONERS MAINTENANCE
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2.2 Typical Troubleshooting for C series Outdoor Unit Drive (Inverter) by Single-phase
Motor
(Applicable to GUHD09NK3CO，GUHD12NK3CO)
2.2.1Brief Introduction to the Electric Control Box of the Outdoor Unit
1.Schematic of Outdoor Unit Electric Control Box (Control board on the left; filter plate board on the right)
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
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