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8.2.4 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 8 minutes after the compressor starts up, if T2
＜
Tcool
－
2
˚
C does not keep continuous 4 seconds and compressor running
frequency higher than 50Hz does not keep continuous 3 minutes, 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:
Shut off the power supply and
turn it on 2 minutes later. Is it
still displaying the error code?
Yes
Is there cool air blowing
out from indoor air outlet?
No
Yes
Check if T2 sensor is well
fixed. Correct the installation
or replace T2 sensor. Does the
problem remain again?
Yes
Is there any leakage? Especially
the connection parts, such as the
gas valve and the liquid valve.
No
Yes
Replace indoor PCB.
Repair the leakage and
recharge the refrigerant.
Is there any blocking? (Ex. The capillary or
the welded points of the pipes.)
Yes
Clear the blocking.
Summary of Contents for DA1221-H2-I
Page 1: ...DuctlessAire ES Series Service Manual 2016 ABSSA B4 1601 ...
Page 8: ...6 For DA1221 H2 I For DA1821 H2 I DA2421 H2 I ...
Page 10: ...8 For DA1221 H2 O ...
Page 11: ...9 For DA1821 H2 O ...
Page 12: ...10 For DA2421 H2 O ...
