MCAC-HTSM-201409 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual
44
Continues
Code
Explanation
Solution
EE
Discharge pipe
temperature sensor
Tp error.
Check whether the Tp temperature sensor is damaged.
Check whether the Tp temperature sensor is correctly
connected to the motherboard.
Check whether the signal of Tp sensor is in strong
electromagnetic interference.
P0
System high
pressure protection
≥4.4MPa active,
≤3.2MPa inactive.
Check whether the high pressure protection switch is
damaged.
Check whether the refrigerant pipes is blocked
Check whether the high pressure protection switch is correctly
connected to the motherboard.
P4
Compressor current
over-load protection.
Check whether the dial code S2 is correct.
Check whether the voltage supplied is in the accepted voltage
range.
Check whether compressor is damaged.
Check whether the refrigerant pipes is blocked
P6
Evaporator pipe
temperature over
high protection
Check whether the T3 temperature sensor is damaged.
Check whether the T3 temperature sensor is correctly
connected to the motherboard.
Check whether the fan is running normally.
PF
Discharge pipe
temperature over
high protection
Check whether the Tp temperature sensor is damaged.
Check whether the system is short for refrigerant.
Check whether the refrigerant pipes is blocked.
Pb
Anti-frozen protection
Check whether T6 and Tout are correctly connected to the
motherboard.
Check whether T6 and Tout are damaged.
The detected temperature of T6 and Tout is lower than 5
℃
.
Normal protection, no need for treatment.