Carrier DHMVHA Service Manual page 26

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DIAGNOSIS AND SOLUTION (CONT.)
Refrigerant Leakage Detection (EL0C)
Error Code
Malfunction decision conditions
Supposed causes
Troubleshooting
Power off. Wait 2 minutes
then restart the unit.
Check cool air blowing out
from indoor air outlet.
Check for system leaks.
Check for system blocking and
clear the block.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
EL0C
Define the evaporator coil temp.T2 of the compressor. It starts running in Tcool. At first, 5 minutes after the
compressor starts up, if T2<Tcool - 35.6°F (Tcool-2°C) does not run for 4 seconds and this situation occurs
three times, the display area displays "EC" and the unit turns off.
Wiring mistake
Sensor faulty
PCB faulty
Yes
No
No
Yes Check the T2 sensor.
Replace indoor PCB.
Yes
Repair the leak and
recharge the refrigerant.
26
Yes