Daikin RXYSQ4-5-6PA7V1B Service Manual page 88

SiBE34-802
1.1.4.2 Procedures for adding refrigerant
Procedure 1: Adding refrigerant by using the automatic refrigerant charging function
(recommended)
How to connect the tank?
When the refrigerant tank is connected and the specified operation is performed, the
appropriate amount of refrigerant will be charged into the system. After charging, the system will
stop automatically. The refrigerant must be charged according to the procedure described
below.
Caution
Automatic refrigerant charging procedure
1. Open the liquid and gas side stop valves completely.
Note that valve A must be closed!
2. Turn on the power of the outdoor unit and indoor units.
Note When an indoor unit is connected to the refrigerant system and the indoor unit is turned off,
automatic charging will fail.
3. Make sure that the led on the PCB on the outdoor unit are as shown in the table below. This
Test Operation
Liquid line stop valve
Gas line stop valve
Service port for
V1
adding refrigerant
Valve A
Measuring instrument
To indoor unit
Make sure to turn ON the power 6 hours before starting the operation. This is necessary to
warm the crankcase by the electric heater.
Automatic charging is able to charge 6 kg/hour refrigerant at an outside temperature of 0°C
to 24 kg/hour refrigerant at an outside temperature of 35°C.
The charging time depends on the amount of charged refrigerant and on the outside
temperature.
Automatic refrigerant charging is NOT possible if the following restrictions are exceeded:
Outside temperature: 0°C DB~43°C DB
Indoor temperature: 0°C DB~32°C DB
Indoor unit connection capacity: 50%~130%
indicates that the system is operating normally.
Liquid line stop valve
Y1
Gas line stop valve
R-410A tank
To indoor unit
H1P H2P H3P H4P H5P H6P H7P
h h i h h h
Test Operation
Pipe fixing plate
Valve A
Service port for adding refrigerant
R-410A tank
Measuring instrument
h
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