Refrigerant Leakage Detection Diagnosis And Solution (Ec) - COMFORT-AIRE A-DVC24SF-1 Service Manual

8.2.6 Refrigerant Leakage Detection diagnosis and solution (EC)

Error Code
Malfunction conditions
Possible causes
Troubleshooting:
Shut off the power supply and
2 minutes
turn it on
still displaying the error code?
Yes
Is there cool air blowing
out from indoor air outlet?
No
Is there any leakage? Especially
the connection parts, such as the
gas valve and the liquid valve.
No
Is there any blockage? (Such as the
capillary or the welded points of the pipes.)
Yes
Clear the blockage.
EC
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
° C (
Tcool－35.6
＜Tcool－2
seconds and this situation happens 3 times, the display area will
show "EC" and AC will turn off.
T2 sensor faulty
●
Indoor PCB faulty
●
System problems, such as leakage or blocking.
●
later. Is it
Yes
Yes
Service Manual - DVC 09/12/18/24 SF Series
°F)
does not remain continuous 4
Check T2 sensor connection.
Correct the installation or
replace T2 sensor. Does the
problem remain?
Yes
Replace indoor PCB.
Repair the leak and
recharge the refrigerant.
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