About Wiring Error Check - Daikin Multi+ R32 Split Series Installer's Reference Manual

12 | Commissioning

12.5.1 About wiring error check

To perform a wiring error check
Installer reference guide
60
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.
INFORMATION
This function is available only for the air-conditioning indoor units. DHW tank wiring
MUST be check manually, automatic correction is NOT possible.
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 and if water temperature in DHW tank
is ≥20°C.
INFORMATION
You only have to perform a wiring error check if you are not sure that the electrical
wiring and piping is connected correctly.
1 Remove the service PCB switch cover.
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.
A
1
2
3
4
2
5
SW3
4MWXM-A9
R32 Split series
4P708645-1 – 2022.09