9. Troubleshooting 9.1 Indoor unit error display Operation lamp Auto lamp Timer lamp Failure ☆ ☆ ☆ Over current protection occurs 4 times ☆ ☆ EEPROM error ☆ The T1 sensor is open circuit or short circuit ☆ The T2 sensor is open circuit or short circuit ☆...
9.2 Diagnosis and Solution 9.2.1 Over current protection occurs 4 times diagnosis and solution Check if the voltage of the Repair the power supply. power supply is too low ? Is the outdoor operation temperature too high? Does the Correct the operation condition. outdoor unit has bad air circulation? Check if the outdoor...
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9.2.2 The temp sensor is open circuit or short circuit diagnosis and solution Check the connections between temperature Correct the connections. sensor and PCB. Are the connections good? Replace the sensor and c h e c k i f t h e p r o b l e m Replace indoor or outdoor PCB.
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9.2.4 Communication malfunction between indoor unit and outdoor unit diagnosis and solution Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes? Check all the wirings between indoor and outdoor, indoor PCB and outdoor PCB following the wiring diagram.
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