Daikin RTSQ20PY1 Service Manual page 147

SiBE31-801_C
Note: When the leak detection function is not required, complete charging when using the previous
described method (unit is not operating) can be done.
If it is not possible to charge the entire quantity through the service port of the liquid pipe stop
valve with the unit not operating, refer to "1.3.5 Remaining Refrigerant Charging Method" on
page 143.
1.3.3 Automatic Refrigerant Charging Operation
After pre-charging, perform the refrigerant charge operation as shown below and charge the
remaining refrigerant of the additional charging amount through valve A. (See P.135)
1. Turn on power for all the indoor units and outdoor units (for Multi system, all the outdoor
2. Make sure to fully open the stop valves of liquid pipe, gas pipe and equalizer pipe (only for
3. Close all front panels except the electric component box front panel and turn the power ON.
Note 1: If the H2P LED is not flashing (in 12 minutes time after turning on the power), make sure it is
displayed as shown in the "2. Normal system display" on P.140.
If the H2P LED is flashing, check the malfunction code on the remote controller "3. Remote
controller malfunction code display" on P.141.
Note 2: If you perform the refrigerant charging operation within the refrigerant system with one or more
units with power OFF, the refrigerant charging operation can not be accomplished properly.
For confirming the number of indoor units with power ON, refer to "1. How to check how many
units are connected" on page 140.
4. Press the BS1 MODE button once if the LEDs combination is not as in the figure below.
5. Press the BS4 TEST button once.
6. Hold the BS4 TEST button down for 5 seconds or more.
7. Charging mode judgement
Note 1: When charging in cooling mode, the unit will stop operating when the required amount of
refrigerant is charged.
Note 2: During charging in heating mode, a person must manually close valve A before complete
charging is finished. The required amount is the calculated amount (see "5. Example of
Connection (R-410A Type)" on page 404), therefore, the weight must be monitored constantly.
Test Operation
units) and the function unit in the whole refrigerant system.
Multi system).
(Valve A, B, C must be closed)
Make sure all indoor units are connected, refer to "1. How to check how many units are
connected" on page 140.
H1P H2P H3P H4P H5P H6P H7P
h h k h h h h
H1P H2P H3P H4P H5P H6P H7P
k k k k k k k
However, if the indoor temperature is 10°C DB or lower or the outdoor temperature is
0°C DB or lower, in some cases the unit will charge in heating mode to increase the indoor
temperature.
The unit will automatically select the cooling mode or heating mode for charging.
Test Operation
136