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 indoo
r PCB
• System problems, such as leakage or blockages
Troubleshooting and repair
:
YES
NO
YES
NO
Page 80
Check System for blockages and
clear blockages if present.
Power off, then restart the unit 2 minutes later.
Does a problem remain?
Check system for leakages.
Are any leakages
present?
Is there cool
air blowing out from
indoor air outlet?
Put your hands in front of the
indoor air outlet.
Is it securely
attached?
indoor PCB
Check the T2 sensor.
Repair the leakage and
recharge the refrigerant.
Trou
b
le
sho
oti
ng
