DC INVERTER U-MATCH AIR CONDITION MAINTENANCE
106
◆Malfunction display: E1 Compressor High Pressure Protection
Mainly check the inlet and outlet of main pipe connecting with
each indoor unit and capillary of indoor and outdoor units.
Replace the parts like filter, capillary and so on.
Check if indoor unit fan and outdoor unit fan
run
Check if swing louver of indoor unit is
completely open
High pressure switch
Y
N
Check if the pressure is really high pressure
with the measurement of a manometer
Check if pressure switch is
normal
Replace the main board
of the outdoor unit.
Replace pressure
switch
Check if operation mode of indoor
unit is properly set
N
N
Y
Y
Y
Y
Check if gas valve and liquid valve
are completely open
Refer to Instruction
Manual of indoor unit
Check if the panel of outdoor unit is
firmly closed?
N
N
Completely open the
valve
Close the panel
Check if the air return and supply from heat exchanger
of indoor unit and outdoor unit are smooth
Remove the blockage
Measure the fan motor and
signal input
Measure swing motor
and signal input
N
N
N
System pipeline is blocked
Y
Y
Y
Y
Check if there is filth blockage to indoor/
outdoor filter or heat exchange fin
Refer to Care and
Maintenance
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