Ec/El 0C (Refrigerant Leakage Detection Diagnosis And Solution) - Pioneer QUANTUM INVERTER Series Service & Troubleshooting Manual

7.7

EC/EL 0C (Refrigerant Leakage Detection diagnosis and solution)

Description: Define the evaporator coil temperature T2 of the compressor just starts running as Tcool.
In the first 5 minutes after the compressor starts up, if T2 < Tcool-1°C(1.8°F) does not keep continuous 4 seconds
and compressor running frequency higher than 50Hz does not keep for 3 minutes, and this situation happens
3 times, the LED displays the failure code and the AC turns off.
Recommended parts to prepare:
• T2 sensor
• Indoor PCB
• Additional refrigerant
Troubleshooting and repair
Power off, then restart the unit 2 minutes later.
Does a problem remain?
Put your hands in front of
the indoor air outlet.
air blowing out from
Check system for leakages.
Check system for blockages
and clear blockages if present.
:
YES
Is there cool
indoor air outlet?
NO
Are any leakages
present?
NO
Troubleshooting

Check the T2 sensor.
YES
Is it securely
attached?
NO
Repair the leakage and
YES
recharge the refrigerant.
28
Replace the
YES
indoor PCB
Securely fix
into place