Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM-201409
43
Error code and protection code:
Code
Explanation
Solution
E2
Outdoor unit and
wired controller
communication error.
Check whether the communication wire is damaged.
Check whether the communication wire is correctly connected
to the motherboard.
Check whether voltage provided is too low.
Check whether the signal of communication wire is in strong
electromagnetic interference.
E3
Outlet water
temperature sensor
Tout error.
Check whether the Tout temperature sensor is damaged.
Check whether the Tout temperature sensor is correctly
connected to the motherboard.
Check whether the signal of Tout sensor is in strong
electromagnetic interference.
E4
Inlet water
temperature sensor
T6 error.
Check whether the T6 temperature sensor is damaged.
Check whether the T6 temperature sensor is correctly
connected to the motherboard.
Check whether the signal of T6 sensor is in strong
electromagnetic interference.
E5
Evaporator pipe
temperature sensor
T3 error.
Check whether the T3 temperature sensor is damaged.
Check whether the T3 temperature sensor is correctly
connected to the motherboard.
Check whether the signal of T3 sensor is in strong
electromagnetic interference.
E7
Ambient temperature
sensor T4 error.
Check whether the T4 temperature sensor is damaged.
Check whether the T4 temperature sensor is correctly
connected to the motherboard.
Check whether the signal of T4 sensor is in strong
electromagnetic interference.
E9
Water flows switch
error.
Check whether the water pump is damaged.
Shut down the unit and start until water in pipe flow fluently.
Check whether the water flow switch is correctly connected to
the motherboard.
Check whether the installation direction of water flow switch is
correct.
Check whether the water flow switch is damaged.