Midea V6R Series Manual page 122

Settings") and all other indoor and outdoor unit field settings have been set as required.
9. The additional refrigerant charge has been added as per Part 3, 8 "Charging Refrigerant". Note: In some circumstances
it may be necessary to run the system in cooling mode during the refrigerant charging procedure. In such circumstances,
points 1 to 8 above should be checked before running the system for the purpose of charging refrigerant and the
outdoor unit liquid and gas valves should be opened.
During commissioning, it is important that you:
 Keep a supply of R410A refrigerant at hand.
 Keep the system layout, system piping and control wiring diagrams at hand.
11.5 Commissioning Trial Runs
11.5.1 Commissioning test run of single refrigerant system
Once all the pre-commissioning checks in Part 3, 11.4 "Pre-commissioning Checks" have been completed, a test run should
be performed as described below and a V6R Series System Commissioning Report (see Part 3, 12 "Appendix to Part 3 –
System Commissioning Report") should be completed as a record of the operating status of the system during
commissioning.
Note: When running the system for commissioning test runs, if the combination ratio is 100% or less, run all the indoor units
and if the combination ratio is more than 100%, run indoor units with total capacity equal to the total capacity of the outdoor
units.
The test run procedure is as follows:
1. Open the outdoor unit liquid, low pressure gas and high pressure gas stop valves.
2. Turn on the power to the indoor units, MS box and outdoor units.
3. If manual addressing is being used, set the addresses of each indoor unit and MS box, refer to part 4 "Field settings" in
"V6R VRF Service Manual".
4. Use the menu mode "n11" to enter the test run according to the method in part 4 "Field settings" in "V6R VRF Service
Manual".
5. Leave the power on for a minimum of 12 hours prior to running the system to ensure that the crankcase heaters have
heated the compressor oil sufficiently.
6. Run the system:
a) Run the system in cooling mode with the following settings: temperature 17°C; fan speed high.
b) After one hour, complete Sheet A of the system commissioning report then:
i. Check the system parameters using system check button on each outdoor unit's data transfer module and
complete the cooling mode columns of one Sheet E and one Sheet F of the system commissioning report for
each outdoor unit.
ii. Check the MS box parameters using the spot check buttons on each MS box's PCB and complete the cooling
mode columns of one Sheet G of the system commissioning report for each group of indoor units
downstream of each MS box.
c) Run the system in heating mode with the following settings: temperature 30°C; fan speed high.
d) After one hour, complete Sheet B of the system commissioning report then:
i. Check the system parameters using system check button on each outdoor unit's data transfer module and
complete the heating mode columns of one Sheet E and one Sheet F of the system commissioning report for
each outdoor unit.
ii. Check the MS box parameters using the spot check buttons on each MS box's PCB and complete the heating
mode columns of one Sheet G of the system commissioning report for each group of indoor units
downstream of each MS box.
e) Run the system in mixed mode with the following settings:
V6R VRF 50/60Hz
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