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30
Installation and Maintenance
Service Manual
Malfunction display: E1 Compressor High Pressure Protection
Mainly check the inlet an
d
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 protection
Y
N
Check if the pressure is really high pressure with the
measurement of a manometer
Replace the outdoor
unit mainboard
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 is
smooth
Remove the barrier
Measure the fan motor and
signal input
Measure swing motor and
signal input
N
N
N
System pipeline is blocked
Y
Y
Y
Check if there is filth blockage to indoor/
outdoor filter or heat exchange fin
Refer to Care and Maintenance
N
Y
Y
N
Check if pressure switch
is abnormal
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