Ec (Refrigerant Leakage Detection Diagnosis And Solution) - Kaisai FLY INVERTER Series Service Manual

5.8

EC (Refrigerant Leakage Detection diagnosis and solution)

Description: Define the evaporator coil temp.T2 of the compressor just starts running as Tcool.
In the beginning 8 minutes after the compressor starts up, if T2<Tcool-1°C does not keep continuous 4 seconds and
compressor running frequency higher than 50Hz does not keep continuous 3 minutes, and this situation happens 3
times, the display area will show "EC" and AC will turn off.
Recommended parts to prepare:
• Faulty T2 sensor
• Faulty
indoor PCB
• System problems, such as leakage or blockages
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
indoor air outlet?
Check system for leakages.
Are any leakages
Check System for blockages and
clear blockages if present.
Page 80
Is there cool
NO
present?
NO
YES Check the T2 sensor.
Is it securely
attached?
Repair the leakage and
YES
recharge the refrigerant.
indoor PCB