38 Specifications subject to change without notice. SG-38MHRC-01
DIAGNOSIS AND SOLUTION (CONT)
Refrigerant Leakage Detection diagnosis and solution (EC)
Description: Define the evaporator coil temp.T2 of the compressor. The compressor starts running in Tcool. At first, 5 minutes after the
compressor starts up, if T2 <Tcool-35.6F (Tcool-2C) does not run for 4 seconds and this situation occurs 3 times, the display area displays
“EC” and the air conditioner turns off.
Possible causes:
• Faulty T2 sensor
• Faulty indoor PCB
• System problems, such as leaks or blockages
Troubleshooting
Check for cool air blowing out
from the indoor air outlet.
Yes
Yes
No
Check for system leaks.
No
Power off, then restart the
unit 2 minutes later.
Replace the indoor PCB.
Yes
Repair the leak and
recharge the refrigerant.
Yes
Check for a system block and
clear the block.
Check the T2 sensor.
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