Allied 4DHV Mini-Split Series - Error Codes and Troubleshooting; Error Code EC Diagnosis

508067-01Issue 2016Page 68 of 75
Error Code: EC
Description: Refrigerant Leakage Detection Diagnosis and Solution
General Note: Dene the evaporator coil temperature T2 of the compressor just starts running as Tcool.
In the beginning eight minutes after the compressor starts up, if T2<Tcool-2°C does not keep continuous four
seconds and compressor running frequency higher than 50Hz does not keep continuous three minutes, and
this situation happens three times, the display area will show “EC” and AC will turn o󰀨.
YES
NO
YES
NO
Check System for blockages and
clear blockages if present.
Power off, then restart the unit 2 minutes later.
Does a problem remain?
YES
Are any leakages
present?
Is there cool
air blowing out from
indoor air outlet?
NO
Check system for leakages.
Put your hands in front of the
indoor air outlet.
Is it securely
aached?
YES
Replace the
indoor PCB
Check the T2 sensor.
Repair the leakage and
recharge the refrigerant.