Specifications

SiBE28-805 Test Operation
Test Operation 73
Charging while the outdoor unit is operating
1. Completely open the gas line stop valve.
Valve A must be left fully closed.
Make sure the liquid stop valve is totally shut. If it is open, the refrigerant cannot be charged.
Charge the additional refrigerant in its liquid state through the service port of the liquid line
stop valve.
2. While the unit is at standstill and under setting mode 2 (refer to Checks before initial start-up,
"Setting the mode" on page 76), 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).
3. When the specified amount of refrigerant is charged, push the BS1 MODE button. Then
operation stops.
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The operation automatically stops within 30 minutes.
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If the refrigerant charge cannot be finished within 30 minutes, repeat step 2.
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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.
4. After the refrigerant charge hose is removed, make sure to fully open the liquid stop valve.
Otherwise the piping may burst due to blocked liquid.
5. After the refrigerant is charged, turn on the power for the indoor units and for the outdoor
unit.
1.2.5.6 Checks after Adding Refrigerant
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Are the stop valves for both liquid and gas open?
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Is the amount of refrigerant, that has been added, recorded?
Make sure to open the stop valves after charging the refrigerant.
Operating with the stop valves closed will damage the compressor.
1.2.6 Before Operation
1.2.6.1 Service Precautions
Warning : ELECTRIC SHOCK
Caution when performing service to inverter equipment
1. Do not open the electric box cover for 10 minutes after the power supply is turned off.
2. Measure the voltage between terminals on the terminal block for power supply with a tester
and confirm that the power supply is shut off.
In addition, measure the points, as shown in the figure below, with a tester and confirm that
the voltage of the capacitor in the main circuit is less than 50 V DC.
3. To prevent damaging the PC board, touch a non-coated metal part to eliminate static
electricity before pulling out or plugging in connectors.
4. The performing of the service to the inverter equipment must be started after the junction
connectors X1A and X2A for the fan motors in the outdoor unit are been pulled out. Be
carefull not to touch the live parts.
(If a fan rotates due to strong wind, it may store electricity in the capacitor or in the main
circuit and cause electric shock.)
5. After the service is finished, plug the junction connecter back in. Otherwise the error code
E7
will be displayed on the remote controller and normal operation will not be performed.
For details refer to the wiring diagram labeled on the back of the electric box cover.
A2P
A1P
A3P
TP1 TP2