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Table 6.2 For 33.5kW unit only,33.5kW unit adopt different PCB
0-1
ENC1
The number of indoor units is in
&
the range 0-1,0-1 on ENC1
0
S9-3
indicate 0-1 indoor units;
1 2 3
Outdoor unit network address
ENC3
setting, Only 0 to 7 should be
0-7
selected (default is 0).
When connected to AC or 1st
1
generation DC indoor unit
S1-1
1 2 3
0
Auto addressing (default)
S1-2
1
Clear indoor unit addresses
1 2 3
0
Reserved
S1-3
1
Reserved
1 2 3
Auto priority (default)
000
100
Cooling priority
010
First ON priority
S2
1 2 3
110
Heating only
001
Cooling only
Other combinations,Heating priority
Reserved
0
S9-1
1
Outdoor unit capacity,12HP
1 2 3
Reserved
0
S9-2
1 2 3
1
Factory test only
NOTE
Please cut off the power supply when
changing the dial switch .
7 COMMISSIONING
7.1 Precautions When Commissioning
WARNING
During the test run, the outdoor unit operates
at the same time with indoor units connected
to it. It is very dangerous to commission
indoor units during the test run.
Do not insert fingers, sticks, or other items
into the air inlet or outlet. Do not remove the
fan mesh cover.
7.2 Checklist Before Commissioning
Once this unit is installed, check the following items first.
After all the following checks have been completed.
Installation
Check if the unit is installed correctly to prevent
strange noises and vibrations when the unit starts.
Field wiring
Based on the wiring schematic and the relevant
regulations, make sure the field wiring is based on
the instructions described in section 5.10 on
connecting wires.
Earth wirings
Make sure the earth wirings is connected
correctly, and the earthing terminal is tight.
Insulation test of main circuit
Use the megameter of 500V, apply a voltage of
500V DC between the power terminal and the
earth
terminal.
resistance is above 2 MΩ. Do not use the
megameter on the transmission line.
Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or locally
installed protection devices comply with the size
and type specified in section 4.4.1 on the
requirements for safety devices. Make sure you
use fuses and protection devices.
Internal wiring
Visually inspect if the connections between the
electrical component box and the interior of the
unit is loose, or if the electrical components are
damaged.
Piping dimensions and insulation
Make sure the installation piping dimensions are
correct, and the insulation work can be carried out
normally.
Stop valve
Make sure the stop valve is open on both the
liquid, low pressure and high pressure gas sides.
Equipment damage
Check for damaged components and extruded
piping inside the unit.
Refrigerant leak
Check for refrigerant leaks inside the unit. If there
is a refrigerant leak, try to repair the leak. If the
repair is not successful, please call the local
dealer. Do not come in contact with the refrigerant
leaking from the refrigerant piping connections. It
may cause frostbite.
Oil leak
Check if there is oil leaking from the compressor.
If there is an oil leak, try to repair the leak. If the
repair is not successful, please call the local
dealer.
Air inlet/outlet
Check for paper, cardboard or any other material
that may obstruct the air inlet and outlet of the
equipment.
Add additional refrigerant
The amount of refrigerant to be added to this unit
should be marked on the "Confirmation Table"
which is placed at electrical control box front
cover.
Installation date and field settings
Make sure the installation date is recorded on the
label of the electric control box cover, and the field
settings are recorded as well.
MAINTENANCE AND REPAIR
8
INFORMATION
i
Arrange for the installation personnel or service
dealer to carry out one maintenance every year.
33
Check
that
the
insulation
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