Charging The Refrigerant; Removing The Control Box - Daikin GYEQ20AN Service Manual

SiAUY361411EA
2.5

Charging the Refrigerant

Caution Check page 203 [1 Precautions to Take before Replacement] before proceeding with the
following steps.
• If the refrigerant is recovered when repairing the refrigerant system or in some other
1. Open all of the stop valves and perform evacuation through the stop valves. Turn ON the
2. Turn on the power supply for the indoor and outdoor units and confirm signal transmission
3. Charge 1 kg of refrigerant from the oil port.
4. Through the gas side stop valve, charge a total amount of refrigerant (initial charged amount
5. Through the liquid side stop valve, charge the remaining full amount.
2.6

Removing the Control Box

Caution Check page 203 [1. Precautions to Take before Replacement] before proceeding with the
following steps.
1. Remove the strut on the front left side.
2. Remove the starter transformer, rectifier, and reactor.
3. Remove all harnesses connected to the connectors inside the control box.
4. Remove the bolts that fasten the upper and lower halves of the control box and the control
5. Remove the bolts that fasten the control box to the intermediate plate.
6. Pull out the upper and lower halves of the control box.
[Reverse the steps above to install the replacement]
∗ Make sure that the types and sizes (length in particular) of the bolts and nuts are correct.
∗ Connect connectors while confirming the electrical connection diagram.
∗ After completing the work, perform an actuator check to check for incorrect wiring.
Replacement of Parts
operation, recharge the refrigerant with the following procedure.
outdoor unit evacuation mode when performing evacuation. Be sure to turn OFF the outdoor
unit evacuation mode after the completion of evacuation.
∗ When charging refrigerant after replacing the compressor, cranking or a similar operation
is required. (See page 206 [2.2 Replacing the Compressor].)
for the indoor and outdoor units.
+ on-site charged amount - 1) in the ratio described in the table below, depending on the
outdoor air temperature.
Outdoor air temperature
Charged amount
If you cannot completely charge the remaining amount, close the liquid side stop valve and
charge refrigerant using the additional refrigerant charging mode.
∗ Since there are numerous connectors, take photographs or sketches or apply markings
as appropriate to ensure that you can exactly restore the original connections.
box base. (The control box splits into upper and lower halves.)
∗ Take care not to damage the circuit boards and other parts.
Note that connectors are identified by shape and color. The connectors with same shape and
color are identified by labels (such as color or number) on the harness side. Also, the
connectors on the PCB are described with the name of the actuator to be connected, so refer
to the shape, color, label and indication on the PCB and take care not to misconnect the
connectors.
0°C or lower 0°C to 30°C
2%
Example of PCB Description
Example of Label
Connector Color to be
Replacement of Primary Parts
Higher than 30°C
5% 10%
028512-00E01
210