Midea MSEAAU-09HRFN1(SB) - Page 43

DM16-01.01.23en Kids Star Inverter
Service manual 43
11.2.5 Refrigerant Leakage Detection diagnosis and solution (PL)
Error Code
PL
Malfunction decision
conditions
● Cooling mode:
25℃＜T4≤50℃
|ucT1Average-ucT2Average|＜coolantT0
|ucT2AveCompOpen- ucT2Average |＜coolantT2
| ucT1AveCompOpen - T1_Average| < 3℃
● Heating mode:
T4≥0℃
|T2Average_heat-T1_Average|＜heatantT0
|ucT2AveCompOpen - T2Average | ＜heatantT2
| ucT1AveCompOpen - T1_Average| < 3℃
Supposed causes ● T2,T4,T1 sensor faulty
● Indoor PCB faulty
● System problems, such as leakage or blocking.
Trouble shooting:
Check air blowing out
from indoor air outlet
Yes
Yes
Check if T2,T1,T4
sensor is well fixed
No
Check leakage of system
No
Power off, then restart the
unit 2 minutes later.
Replace indoor PCB.
Yes
Repair the leakage and
recharge the refrigerant.
Yes
check blockIng of system and
clear the blocking