TCL Air Conditioner Service Manual
37
3.2.3 E4 ---
AC Cooling system abnormal (Gas not enough)
Start
Display E4
Check the pressure
Lower than 0.8 Mpa in
cooling, 2.0 Mpa in
heating, is not enough
Add gas
Check the valves open or
not
E4 display?
System block
Maintain the system
Check the sensor short or
open?
AC pressure correct?
(cooling:0.8-1.3Mpa,/
heating 2.0-3.6Mpa)
Replace the sensor
Replace the main PCB
Open the valves
End
No
No
No
No
Yes
Yes
Yes
Yes