20
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Commissioning
Installer and user reference guide
131
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1A – 2020.10
Damaged equipment
Check the inside of the unit for damaged components or squeezed pipes.
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a refrigerant leak, try to repair
the leak. If the repair is unsuccessful, call your local dealer. Do not touch any refrigerant
which has leaked out from refrigerant piping connections. This may result in frostbite.
Oil leak
Check the compressor for oil leakage. If there is an oil leak, try to repair the leak. If the
repairing is unsuccessful, call your local dealer.
Air inlet/outlet
Check that the air inlet and outlet of the unit is NOT obstructed by paper sheets,
cardboard, or any other material.
Additional refrigerant charge
The amount of refrigerant to be added to the unit shall be written on the included "Added
refrigerant" plate and attached to the rear side of the front cover.
Installation date and field setting
Be sure to keep a record of the installation date on the sticker on the rear of the front
panel according to EN60335‑2‑40 and keep record of the contents of the field setting(s).
Insulation and air leaks
Make sure the unit is fully insulated and checked for air leaks.
Possible consequence:
Condensate water might drip.
Drainage
Make sure drainage flows smoothly.
Possible consequence:
Condensate water might drip.
External static pressure
Make sure the external static pressure is set.
Possible consequence:
Insufficient cooling or heating.
20.4 Checklist during commissioning
To perform a
test run
.
20.4.1 About the test run
NOTICE
Make sure to carry out the test run after the first installation. Otherwise, the
malfunction code
will be displayed on the user interface and normal operation or
individual indoor unit test run cannot be carried out.
The procedure below describes the test operation of the complete system. This
operation checks and judges following items:
▪
Check of wrong wiring (communication check with indoor units and heat
exchanger unit).
▪
Check of the stop valves opening.
▪
Check of wrong piping.
Example:
Gas or liquid pipes switched.
▪
Judgement of piping length.
