P5: Condenser High Temperature Protection - Midea Mini VRF Technical & Service Manual

R410A All DC Inverter Mini VRF

4.13 P5: Condenser high temperature protection

When condenser temperature is higher than 62 degrees for 3 seconds, the unit will stop operating.
When pipe temperature outside is lower than 52 degrees, the unit will resume operate.
LED displays P5
Condenser T3 high temperature protection
Check whether condenser temperature is higher than
62 degrees for 3 seconds.
Check whether the resistance of condenser
temperature sensor is correct.
Replace the outdoor PCB.
Clean heat exchanger
Remove the refrigerant pipe and then
use high pressure
refrigerant to
Vacuumed the pipe then add the
refrigerant again.
74
NO
YES
Stop the unit
YES
nitrogen or
blow the pipe.
NO
Replace the temperature sensor
YES
Judge 1: whether outdoor temperature is too high(higher than
Judge 2: whether heat exchanger needs cleaning.
YES
Judge 3: if refrigerant pipe is blocked or not?
Replace outdoor PCB.
MCAC-VTSM-2016-02
YES
43 degrees)nor not
NO
NO
NO
Troubleshooting