7URXEOHVKRRWLQJ
41
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Malfunction
D
isplay: E3 Compressor Low Pressure Protection
Y
N
N
Y
Y
Y
N
N
N
N
N
Y
Y
Y
N
N
N
Y
Y
Y
Compressor Low
Pressure Protection
Check if the pressure is really low pressure
with the measurement of a manometer
Check if operation mode of
indoor unit is properly set
Check if gas valve and liquid valve
are completely open
Check if the panel of
outdoor unit is firmly closed
Check if the air return and supply from
heat exchanger of indoor unit and outdoor
unit is smooth
Check if indoor unit fan and outdoor unit fan run
Check if swing louver of indoor unit is completely open
Check if there is filth blockage to indoor/outdoor
filter or heat exchange fin
System pipeline is blocked
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.
Refer to Care and Maintenance
Measure swing motor and
signal input
Measure the fan motor and
signal input
Remove the barrier
Close the panel
Completely open the valve
Refer to Instruction Manual of indoor unit
Charge refrigerant according to the amount
specified in the nameplate and calculated
additional amount
Refer to the high pressure
protection
Check if the refrigerant in the
system is sufficient
