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R410A 60Hz 16 SEER Universal Outdoor Series Technical Manual
E2: Indoor ambient temp. sensor fault (T1 sensor)
Solution:
(1)Check the T1 sensor connection loosen or not, inset it firmly, if not solve, go to next step;
(2)Take out the sensor, measure the resistance of the sensor, it is about 5KΩ at 25℃, if not, replace it; if resistance
normally, change the indoor main board.
E3: Indoor evaporator pipe temperature sensor (T2) failure
Solution:
(1)Check the T2 sensor connection loosen or not, inset it firmly, if not solve, go to next step;
(2)Take out the sensor, measure the resistance of the sensor, it is about 5KΩ at 25℃, if not, replace it; if resistance
normally, change the indoor main board
E5: Outdoor unit failure
Check the detail of failure at the outdoor unit.
E7: EEPROM failure
Change the indoor mainboard
E8: The protection for the stall of indoor fan motor
Solution:
(1)Check the connection between motor and main board is loosen or not, inset it firmly
(2)Check that is something blocked the motor or fan blade, if it is, remove it; if not, change the indoor main board or
DC motor
E9: Indoor unit and wire controller communication failure
Solution:
(1)Check the connection between wired controller and main board is loosen or not, inset it firmly
(2)Connect with a new wired controller, if not solve, change with a new communication cable
(3)If all above steps done, it still not solves, change the indoor main board or transformer.
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