Daikin 2MXM68N2V1B, Installation Manual

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10 Commissioning
Installation manual
20
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
3P600450-1D – 2020.08
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.
10.2 Checklist during commissioning
To perform a wiring check.
To perform an air purge .
To perform a test run .
10.3 Trial operation and testing
For the Hybrid for Multi, certain precautions are required before
using this function. For more information, see the indoor unit
installation manual and/or the indoor installer reference guide.
Before starting the test run, measure the voltage at the
primary side of the
safety breaker .
The piping and wiring work match.
The stop valves (gas and liquid) on the outdoor unit are
fully open.
Initialization of the Multi system can take several minutes depending
on the number of indoor units and options used.
10.3.1 About wiring error check
The wiring error check function will check and automatically correct
any wiring errors. This is useful for checking wiring that CANNOT be
checked directly, such as underground wiring.
This function CANNOT be used within 3 minutes after activating the
safety breaker or when the outside air temperature is ≤5°C.
To perform a wiring error check
INFORMATION
▪ You only have to perform a wiring error check if you are
not sure that the electrical wiring and piping is
connected correctly.
▪ If you perform a wiring error check, the hybrid for multi
indoor unit will not operate by heat pump for 72 hours.
During this time, the gas boiler will take over the hybrid
operation.
1 Remove the service PCB switch cover.
A
1
2
3
4
5
SW3
2
1×
1
2 Press the wiring error check switch (SW3) on the outdoor unit
service PCB.
Result: The service monitor LEDs indicate whether correction
is possible or not. For details about how to read the LED
display, refer to the service manual.
Result: Wiring errors will be corrected after 15-20 minutes. If
automatic correction is not possible, check the indoor unit wiring and
piping in the usual way.
INFORMATION
▪ The number of LEDs displayed depends on the number
of rooms.
▪ The wiring error check function will NOT work if outside
temperature is ≤5°C.
▪ After wiring error check operation is completed, LED
indication will continue until normal operation starts.
▪ Follow the product diagnosis procedures. For details of
product error diagnosis refer to service manual.
Status of LEDs:
▪ All LEDs flash: automatic correction is NOT possible.
▪ LEDs flash alternately: automatic correction is completed.
▪ One or more LEDs are permanently on: abnormal stop (follow the
diagnosis procedure on the back of the right side plate and refer to
service manual).
10.3.2 To perform a test run
Prerequisite: Power supply MUST be in the specified range.
Prerequisite: Test run operation may be done in cooling or heating
mode.
Prerequisite: Test run should be done in accordance with the
operation manual of the indoor unit to make sure that all functions
and parts are working properly.
1 In cooling mode, select the lowest programmable temperature.
In heating mode, select the highest programmable temperature.
2 Measure the temperature at the indoor unit inlet and outlet after
running the unit for about 20 minutes. The difference should be
more than 8°C (cooling) or 20°C (heating).
3 First check operation of each unit individually, then check
simultaneous operation of all indoor units. Check both heating
and cooling operation.
4 When test run is finished, set the temperature to a normal level.
In cooling mode: 26~28°C, in heating mode: 20~24°C.
INFORMATION
▪ Test run can be disabled if necessary.
▪ After the unit is turned OFF, it cannot be started again
for 3 minutes.
▪ When the test run is started in the heat mode right after
turning the safety breaker on, in some cases no air will
be output for about 15 minutes in order to protect the
unit.
▪ Operate only air conditioner during test run. Do NOT
operate the Hybrid for Multi or the DHW generator
during test run.
▪ During cooling operation, frost may form on the gas
stop valve or other parts. This is normal.
INFORMATION
▪ Even if the unit is turned OFF, it consumes electricity.
▪ When the power turns back on after a power break, the
previously selected mode will be resumed.