12
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Commissioning
Installer reference guide
62
2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9
R32 Split series
4P600463-7G – 2022.09
NOTICE
Turn ON the power 6 hours before operation in order to have power running to the
crankcase heater and to protect the compressor.
During test operation, the outdoor unit and the indoor units will start up. Make
sure that the preparations of all indoor units are finished (field piping, electrical
wiring, air purge, ...). See installation manual of the indoor units for details.
12.3 Checklist before commissioning
1
After the installation of the unit, check the items listed below.
2
Close the unit.
3
Power up the unit.
The
indoor unit
is properly mounted.
The
outdoor unit
is properly mounted.
The system is properly
earthed
and the earth terminals are tightened.
The
power supply voltage
matches the voltage on the identification label of the unit.
There are NO
loose connections
or damaged electrical components in the switch box.
There are NO
damaged components
or
squeezed pipes
on the inside of the indoor and
outdoor units.
There are NO
refrigerant leaks
.
The
refrigerant pipes
(gas and liquid) are thermally insulated.
The correct pipe size is installed and the
pipes
are properly insulated.
The
stop valves
(gas and liquid) on the outdoor unit are fully open.
Drainage
Make sure drainage flows smoothly.
Possible consequence:
Condensate water might drip.
The indoor unit receives the signals of the
user interface
.
The specified wires are used for the
interconnection cable
.
The
fuses, circuit breakers,
or locally installed protection devices are installed according to
this document, and have NOT been bypassed.
Check if marks (room A~E) on the wiring and piping match for each indoor unit.
Check if the priority room setting is set for 2 or more rooms. Keep in mind that the DHW
generator for Multi or the Hybrid for Multi shall not be selected as the priority room.
12.4 Checklist during commissioning
To perform a
wiring
check.
To perform an
air purge
.
To perform a
test run
.
