Specifications

SiBE18-821 Test Operation
Test Operation 129
Procedure 2: Charging while the outdoor unit is at a standstill
1. Determine the weight of refrigerant to be charged additionally referring to the page 10 "Note:
1" and fill in the amount in the "Additional refrigerant charge label" attached to the unit.
2. After the vacuum drying is finished, open valve A and charge the additional refrigerant in its
liquid state through the service port on the liquid stop valve taking into account following
instructions:
- Turn on the power of the outdoor unit and indoor units.
- Check that gas and liquid stop valves are closed.
- Stop the compressor and charge the specified weight of refrigerant.
Caution
♦
To avoid compressor breakdown. Do not charge the refrigerant more than the specified
amount.
♦
If the total refrigerant cannot be charged while the outdoor unit is at a standstill, it is possible
to charge the refrigerant by operating the outdoor unit using the refrigerant charge function
(refer to "Setting mode 2" on page 138) and follow "Procedure 3: Charging while the outdoor
unit is operating" below.
Procedure 3: Charging while the outdoor unit is operating
See the figure in "How to connect the tank?" on page 122.
1. Completely open the gas side stop valve and liquid side stop valve. Valve A must be left fully
closed.
2. Close the front panel and turn on the power to all indoor units and the outdoor unit.
3. Open valve A immediately after starting of the compressor.
4. Charge the additional refrigerant in its liquid state through the service port of the liquid line
stop valve.
5. While the unit is at a standstill and under setting mode 2 (refer to "Setting the mode 2" on
page 138), set the required function A (additional refrigerant charging operation) to ON (ON).
Then operation starts. The blinking H2P led indicates test operation and the remote
controller indicates TEST (test operation) and (external control).
6. When the specified amount of refrigerant is charged, push the BS3 RETURN button. Then
operation stops.
♦
The operation automatically stops within 30 minutes.
♦
If the refrigerant charge cannot be finished within 30 minutes, repeat step 5.
♦
If the operation stops immediately after restart, there is a possibility that the system is
overcharged.
The refrigerant cannot be charged more than this amount.
7. After the refrigerant charge hose is removed, make sure to close valve A.
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V1 Y1