Daikin 2MXM68A2V1B9 Manuel D'installation page 19

1×
2 Press shortly 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
INFORMATION
If the unit runs into an error during commissioning, see the
service manual for the detailed troubleshooting guidelines.
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.
2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9
R32 Split series
3P774208-3 – 2024.05
A
1
2
3
4
2
5
SW3
11 Maintenance and service
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.
10.4 Starting up the outdoor unit
See the indoor unit installation manual for configuration and
commissioning of the system.
11 Maintenance and service
NOTICE
General maintenance/inspection checklist. Next to the
maintenance instructions in this chapter, a general
maintenance/inspection checklist is also available on the
Daikin Business Portal (authentication required).
The general maintenance/inspection
complementary to the instructions in this chapter and can
be used as a guideline and reporting template during
maintenance.
NOTICE
Maintenance MUST be done by an authorised installer or
service agent.
We recommend performing maintenance at least once a
year. However, applicable legislation might require shorter
maintenance intervals.
NOTICE
Applicable legislation on fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
Formula to calculate the quantity in CO
tonnes: GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
DANGER: RISK OF ELECTROCUTION
Disconnect the power supply for more than 10 minutes,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing. The
voltage MUST be less than 50 V DC before you can touch
electrical components. For the location of the terminals,
see the wiring diagram.
checklist
equivalent.
equivalent
2
Installation manual
is
19