INVENTOR u-match on/off Service Manual page 99

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