10 Commissioning
Installation manual
19
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
3P600450-1D – 2020.08
2
1
A
1
2
3
4
5
2
1
SW6
2
OFF
ON
1×
1
2
Set the night quiet mode switch (SW6-1) to ON.
9.4
About heat mode lock
Heat mode lock limits the unit to heat operation.
9.4.1
To turn on heat mode lock
1
Remove the switch cover on the service PCB.
2
Set the heat mode lock switch (SW5-1) to ON.
4
3
2
1
4
3
2
1
A
1
2
3
4
5
SW5
2
OFF
ON
1×
1
9.5
About cool mode lock
Cool mode lock limits the unit to cool operation. Forced operation
remains possible in cool mode.
Specifications for the connector housing and pins: ST products,
housing VHR‑5N, pin SVH‑21T‑1,1
When cool mode lock is used in combination with the Hybrid for
Multi, these units will not operate by the heat pump.
9.5.1
To turn on cool mode lock
1
Short-circuit pins 3 and 5 of connector S15.
4×
VHR-5N
SVH-21T-1
S15
1 3
5
10
Commissioning
NOTICE
ALWAYS operate the unit with thermistors and/or pressure
sensors/switches. If NOT, burning of the compressor might
be the result.
10.1
Checklist before commissioning
After the installation of the unit, first check the items listed below.
Once all checks are fulfilled, the unit must be closed. Power-up the
unit after it is closed.
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.
Summary of Contents for 2MXM68N2V1B
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