38
Installation and Maintenance
Service Manual
7. High discharge temperature protection of compressor (E4)
Start
System is abnormal (such as blockage)
Out door uni t’s mo tor is abnormal
(under cooling mode)
Outdoor air comes in abnormally
(under cooling mode)
System is abnormal ,
but resist ance v alue of discharge
sensor for compressor
temperature is abno rmal
Replace con trol
panel
End
Check the system;
Eliminate the block-
age inside the system
Check wiring and
fan capacitor;
replace motor
Check the unit to
let air come in and
come out smoothly
Replace temperature
sensor
Problem is solved
Problem is solved
Problem is solved
Problem is solved
no
no
no
no
no
no
no
no
yes
yes
yes
yes
yes
yes
yes
