MCAC-RTSM-2013-12
Midea High-temperature Direct-heating Heat Pump Water Heater Technical Manual
45
De-frosting
mode
De-frosting solenoid
valve is not open
Check the de-frosting solenoid valve.
The four-way directional valve
cannot change the direction
Check the four-way directional valve.
P2
Current protection for
system 2
Compressor current protection before system
high pressure protection
The same as the system high
pressure protection.
P3
Current protection for
system 1
Compressor current protection before system
high pressure protection
The same as the system high
pressure protection.
P8
Protection for
excessive high outlet
water temperature
Deficient water flow, the outlet water
temperature is higher than 70
℃
and maintain
for one minute
The same as the system high
pressure protection.
Pb
Anti-freezing
protection
Prevent PTE cracking by freezing in the winter
Normal protection, no need for treatment.
P4
Manual mode setting is invalid.
When there is any failure or protection, the red indicator of the wire controller will twinkling and the wire controller and the
digital pipe of the main unit control panel will display the code. The code of the slave unit should be checked and transferred to
the corresponding address on the wire controller and then be found by page down and page up.
