SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)
56 421 08 9204 00
Improperly set temperature
Adjust set temperature
If cooling or heating load is
matched to unit
Check the forecasted load of cooling (heating)
The refrigerant has leakage
or is insufficient
Leakage between the high pres−
sure and the low pressure in−
side the compressor
Replace the compressor
Malfunction of four−way valve
Replace the four−way valve
Blocked capillary or failure of
metering device
Replace the capillary or metering
device
Malfunction of
refrigerant flow
Heat insulation for the connection
pipes of the indoor unit and the out−
door unit is bad.
Make sure that heat insulation for the thick and thin pipes
is good. Heat insulation must also be provided for the
joint and the exposed part of the copper pipe .
Block of outdoor heat ex−
changer
Clean the dust accumulated on the
surface of the heat exchanger.
Air filter were blocked
Clean the filter
Fan speed was set too slow
Set the fan speed to high or
middle speed
Air circulation
is insufficient
Fan rotation speed becomes
low
Capacitor
damage
Motor
damage
Replace the
capacitor
Replace the motor
The installation position of
the outdoor unit is not
appropriate.
Good ventilation must be provided for
the installation of the outdoor unit.
The outdoor temperature is too high.
Properly install the rainproof plate or the sunproof
plate. If the maximum cool air still can not meet the
requirement, it is suggested to replace the air
conditioner.
Minimize air migration, try not to use
electrical appliance with large quantity of heat
Too much air migration. People
come in and out too frequently. There
are heating devices indoors.
Poor COOL (HEAT) operation
Fix the leak and recharge the system.
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