Daikin RXYQ10PY1 [281/487] Procedure of adding refrigerant charging and check operation

Daikin RXYQ5PY1 [281/487] Procedure of adding refrigerant charging and check operation
ED34-645B Additional Refrigerant Charge and Check Operation
Installation of Outdoor Units 673
15
11.2 Procedure of Adding Refrigerant Charging and Check Operation
Warning Electric Shock Warning
Make sure to close the EL. COMPO. BOX lid before turning on the power when performing the refrigerant
charging operation.
Perform the setting on the PC-board (A1P) of the outdoor unit and check the LED display after the power is on via
the inspection door which is in the EL. COMPO. BOX lid.
Use an insulated rod to operate the push buttons via the EL. COMPO. BOX’s inspection door.
There is a risk of electric shock if you touch any live parts, since this operation must be performed with the power
on.
Caution
Make sure to use the protect tool (protective groves and goggles) when charging the refrigerant.
Due to a danger of liquid hammer, the refrigerant must not be charged over the allowable maximum amount when
charging the refrigerant.
Do not perform the refrigerant charging operation under working for the indoor unit.
When opening the front panel, make sure to take caution to the fan rotation during the working.
After the outdoor unit stops operating, the fan may keep rotation for a while.
If operation is performed within 12 minutes after the indoor and outdoor units are turned on, H2P will be lit on
and the compressor will not operate.
In order to ensure uniform refrigerant distribution, it may take up to around 10 minutes for the compressor to
start up after the unit starting operating. This is not a malfunction.
<About refrigerant charging>
The refrigerant charge port is connected to the piping inside the unit.
When the unit is shipped from the factory, the unit’s internal piping is already charged with refrigerant, so be
careful when connecting the charge hose.
After adding the refrigerant, make sure to close the lid of the refrigerant charging port.
The tightening torque for the lid is 11.5 to 13.9 Nm.
See [Shutoff valve operation procedure] in chapter 11-1 for details on how to handle shutoff valves.
When done or when pausing the refrigerant charging operation, close the valve of the refrigerant tank
immediately. If the tank is left with the valve open, the amount of refrigerant which is properly charged may be off
the point. More refrigerant may be charged by any remaining pressure after the machine is stopped.
<About check operation>
Make sure to perform the check operation after installation. Otherwise, the malfunction code “U3” will be displayed
and normal operation cannot be performed.
And the failure of “Check of miswiring” may also cause abnormal operation. Performance may drop due to the
failure of “Judgment of piping length”.
Check operation must be performed for each refrigerant piping system.
Checking is impossible if plural systems are being done at once.
The individual problems of indoor units can not be checked.
About these problems check by test run after the check operation is completed. (See chapter 13)
The check operation cannot be performed in recovery or other service modes.
1. Make sure the following works are complete in accordance with the installation manual.
Piping work
Wiring work
Air tight test
Vacuum drying
Installation work for indoor unit
2. Calculate the “additional charging amount” using “How to calculate the additional refrigerant to be charged” in “6-
5 Example of Connection”.
Note

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