Platinum Series Troubleshooting (9K & 12K)

NO.	Malfunction Name	Display Method of Indoor Unit				Display Method of Outdoor Unit			A/C Status	Possible Causes
		Dual-8 Code Display	Indicator Display			Indicator Display
			Operation Indicator	Cooling Indicator	Heating Indicator	Yellow Indicator	Red Indicator	Green Indicator
1	High pressure protection of system	E1	Off 3s and blink once						During cooling and drying operation, all loads except the indoor fan stop operation. During heating operation, the entire unit stops.	Refrigerant was superabundant; Poor heat exchange (including filth blockage of heat exchanger and bad radiating environment); Ambient temperature is too high.
2	Antifreezing protection	E2	Off 3s and blink twice			Off 3s and blink 3 times			During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates.	Poor air-return in indoor unit; Fan speed is abnormal; Evaporator is dirty;
3	System block or refrigerant leakage	E3	Off 3s and blink 3 times				Off 3s and blink 9 times		Dual-8 code display will show E3 until the low pressure switch stops operation.	Low-pressure protection Low-pressure protection of system Low-pressure protection of compressor
4	High discharge temperature protection of compressor	E4	Off 3s and blink 4 times			Off 3s and blink 7 times			During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating, all loads stop.	Please refer to malfunction analysis below.
5	Overcurrent protection	E5	Off 3s and blink 5 times			Off 3s and blink 5 times			During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating, all loads stop.	Supply voltage is unstable; Supply voltage is too low and load is too high; Evaporator is dirty;
6	Communication malfunction	E6	Off 3s and blink 6 times					Off	During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating, all loads stop.	Please refer to malfunction analysis below.
7	High temperature resistant protection	E8	Off 3s and blink 8 times			Off 3s and blink 6 times			During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating, all loads stop.	Please refer to malfunction analysis below.
8	EEPROM malfunction	EE			Off 3s and blink 15 times	Off 3s and blink 11 times			During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating, all loads stop.	Replace outdoor control panel AP1
9	Limit/decrease frequency due to high temperature of module	EU		Off 3s and blink 6 times	Off 3s and blink 6 times				All loads operate normally, while operation frequency for compressor is decreased.	Discharging after the complete unit is de-energized for 20mins, check whether the thermal grease on IPM module of outdoor control panel AP1 is sufficient and whether the radiator is inserted tightly. If it is no use, please replace control panel AP1.
10	Malfunction protection of jumper cap	C5	Off 3s and blink 15 times						Indoor unit does not respond to the wireless remote commands.	No jumper cap inserted to main board; Jumper cap is inserted incorrectly; Jumper cap is damaged; Abnormal detecting circuit of main board;
11	Gathering refrigerant	F0	Off 3s and blink once	Off 3s and blink once					When the outdoor unit receives the F0 signal, the system will be forced to run under cooling mode for gathering refrigerant.	Nominal cooling mode
12	Indoor ambient temperature sensor is open/short circuited	F1		Off 3s and blink once					During cooling and drying operation, indoor unit operates while other loads will stop. During heating operation the complete unit will stop operation.	Loosening or bad contact of indoor ambient temp. sensor and main board terminal; Components in main board fell down leading to short circuit; Indoor ambient temp. sensor damaged; Main board damaged;
13	Indoor evaporator temperature sensor is open/short circuited	F2		Off 3s and blink twice					AC stops operation once it reaches the set temperature. Cooling/drying: internal fan motor stops operation while other loads stop operation. Heating: AC stops operation.	Loosening or bad contact of indoor evaporator temp. sensor and main board terminal; Components in main board fell down leading to short circuit; Indoor evaporator temp. sensor damaged; Main board damaged;
14	Outdoor ambient temperature sensor is open/short circuited	F3		Off 3s and blink 3 times			Off 3s and blink 6 times		During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating, all loads stop.	Outdoor temperature sensor hasn't been connected well or is damaged.
15	Outdoor condenser temperature sensor is open/short circuited	F4		Off 3s and blink 4 times			Off 3s and blink 5 times		During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating, all loads stop.	Outdoor temperature sensor hasn't been connected well or is damaged.