INVENTOR u-match on/off, Service Manual

Page: 99 / 163

U-MATCH AIR CONDITIONERS MAINTENANCE
96
‹
Malfunction display: E4 Compressor Exhaust High Temperature Protection
Compressor Exhaust High
Temperature Protection
Check if the capacity output of the outdoor
unit meets with the capacity requirement of
the indoor unit?
check if the liquid bypass parts are in good
conditions, for examples, if the solenoid
valve works properly or the capillary is
clogged?
check if the liquid bypass plug is connected
when the air exhaust temperature of the
compressor exceeds 115
ć
?
Check if the air exhaust temperature has
reached 130
ć˛
Yes
Yes
Yes
Yes
Check if the resistance value of the
sensor is correct?
Replace the main board of the
outdoor unit
Repair if system tube is
leaking and add refrigerant of
the same quality
refer to capacity code
Replace the liquid bypass
parts
No
No
No
No
replace the corresponding
discharge temperature sensor
No
Yes