Daikin VRV III REYQ8PY1B, Service Manual

Page: 185 / 472

Test Operation SiBE37-701
174 Test Operation
Note:
For a multi outdoor unit system, it is not required to connect all charge ports to a refrigerant
tank.
The refrigerant will be charged with ±30 kg in 1 hour time at an outdoor temperature of 30°C DB
or with ±12 kg at an outdoor temperature of 0°C DB.
If you need to speed up in case of a multiple outdoor system, connect the refrigerant tanks to
each outdoor unit as shown in figure on page 173.
1. Start of automatic charging refrigerant
- Open the liquid pipe, suction gas pipe, high pressure/low pressure gas pipe and equalizer
pipe stop valves and the service port stop valve. (Valves A, B and C must be closed.)
- Close all front panels except the electric component box front panel and turn the power
ON.
- Make sure all indoor units are connected, refer to "How to check how many units are
connected" on page 179.
- 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 "Normal system display" on page 177.
If the H2P LED is flashing, check the malfunction code on the remote controller " Remote
controller malfunction code display" on page 178.
„
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 "How to check how many
units are connected" on page 179.
In case of a multi system, turn the power ON to all outdoor units in the refrigerant system.
„
To energize the crankcase heater, make sure to turn the power ON at least 6 hours before
starting operation.
2. Press the BS1 MODE button once if the LEDs combination is not as in the figure below.
3. Press the BS4 TEST button once.
4. Hold the BS4 TEST button down for 5 seconds or more.
5. Charging mode judgement
However, if the indoor temperature is 10°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.
„
When charging in cooling mode, the unit will stop operating when the required amount of
refrigerant is charged.
„
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 "6. Example of
connection" on page 433), therefore, the weight must be monitored constantly.
H1P H2P H3P H4P H5P H6P H7P
h h i h h h h
H1P H2P H3P H4P H5P H6P H7P
i i i i i i i