39
9.3.6 Refrigerant Leakage Detection diagnosis and solution(EC)
Error Code
EC
Malfunction decision
conditions
Define the evaporator coil temp.T2 of the compressor just starts
running as Tcool.
In the beginning 5 minutes after the compressor starts up, if T2
<
Tcool
-
2
°
C(Tcool
-
35.6
°
F) does not keep continuous 4
seconds and this situation happens 3 times, the display area will
show
“
EC
”
and AC will turn off.
Supposed causes
●
T2 sensor faulty
●
Indoor PCB faulty
●
System problems, such as leakage or blocking.
Trouble shooting:
Summary of Contents for MSMBB-12CRDN1-MP0W
Page 7: ...5 2 2 Part names of Indoor Outdoor units ...
Page 9: ...7 For MSMBB 12CRDN1 MP0W For MSMBC 18CRDN1 MP0W For MSMBD 22CRDN1 MP5W ...
Page 13: ...11 MOF1 22CDN1 MP5W ...
Page 25: ...23 ...
Page 32: ...30 MOF1 22CDN1 MP5W ...
Page 36: ...34 9 2 3 Zero crossing detection error diagnosis and solution E2 ...
Page 39: ...37 supply or 50V 115V power supply the PCB must has problems and need to be replaced ...
Page 45: ...43 P W N U ...
Page 46: ...44 N V N W ...