Bryant 619AHB Series Service Manual page 24

SG-619AHB-01: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
Refrigerant Leakage Detection diagnosis and solution (EC)
Malfunction Decision Conditions
Define the compressor's evaporator coil temp.T2. The unit starts running in Tcool. Five minutes after the compressor starts, 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 air conditioner turns off.
Possible Causes:
• System problems such as leaks or blockage
• T2Sensor faulty
• Indoor PCB faulty
Troubleshooting
Power off, then restart the
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.
unit 2 minutes later.
Yes
Check cool air blowing out
from indoor air outlet.
No
Check for system leaks.
No
Check the T2 sensor.
Yes
Yes
Replace indoor PCB.
Yes
Repair the leakage and
recharge the refrigerant.
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