Daikin VRV III, Руководство по обслуживанию, Страница: 244 / 567

SiUS34-801A_b Test Operation
VRVIII R-410A Heat Recovery 60Hz 229
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 gloves 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 while working on the BS and indoor unit.
When opening the front panel, make sure to be careful of the fan rotation while working. After
the outside unit stops operating, the fan may continue rotating for a while.
NOTE: If operation is performed within 12 minutes after the BS, indoor and outside units are
turned on, H2P will be lit on and the compressor will not operate.
Check the LED display indicate as shown below.
In order to ensure uniform refrigerant distribution, allow up to 10 minutes after initially starting
operation for the compressor to startup. . This is not a malfunction.
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 cap of the refrigerant charging port.
The tightening torque for the lid is 8.48 to 10.3 ft · lbf.
See [Shutoff valve operation procedure] in chapter 10.2.6.1 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.
The refrigerant charge port of this product has an electric expansion valve.
The valve will be closed at end of refrigerant charging. However the valve will be opened on
operation after refrigerant charging (check operation, normal operation, etc.).
If the tank is left with the valve open, the amount of refrigerant which is properly charged may be
incorrect.
Make sure to perform the check operation after installation. Otherwise, the malfunction code
[U3] will be displayed and normal operation cannot be performed.
Failure to check for miswiring may also cause abnormal operation. Performance may drop due
to the failure of proper 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.
Perform a test run after the check operation is completed. (See Section 10.2.8.2).
The check operation cannot be performed in recovery or other service modes.
10.2.6.2.1 Procedure of Adding Refrigerant charging
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 BS, indoor unit
2. Calculate the additional charging amount using How to calculate the additional refrigerant
to be charged in Part 6. Example of connection .
H1P H2P H3P H4P H5P H6P H7P
h i h h h h h