Wiring Error Check Function - Daikin Super multi NX E Series Service Manual

SiBE121135_A

3. Wiring Error Check Function

Outline The convenient wiring error check function is designed for the microcomputer to correct wiring
errors itself.
If local wiring is unclear in the case of buried piping, for example, just press the wiring error
check switch that is behind the stop valve cover of the outdoor unit. Even if the connections for
Room A and Room B are confused, the system may run without a hassle. Note that this check
function does not work in the following cases.
When the piping and wiring are perfect, there is no need to use this function.
Operation
1. Remove the stop valve cover.
2. Press the wiring error check switch (SW3) on the service monitor PCB of the outdoor unit,
3. In about 10 ~ 20 minutes, the check finishes automatically.
4. When the check is over, the service monitor LED indicators start blinking.
Note: 1. Wrongly connected liquid and gas pipes cannot be self-corrected. Be sure to make the liquid
2. To cancel the wiring error check procedure halfway, press the wiring error check switch
3. When replacing the outdoor unit PCB, be sure to use this function.
4. Make the priority room setting after wiring error check. If you set the priority room before
Trial Operation and Field Settings
For 3-minute standby period after the power is turned on or after the compressor has
stopped.
When the outdoor temperature is below 5°C.
If the indoor unit is in trouble (also in case of all-room transmission failure).
and the wiring error check function is activated.
LED 1 2
All blinking at once
Status
Blinking one after another
Self-correction complete...The LED indicators 1 ~ 3 (3-room model), 1 ~ 4 (4-room model),
or 1~5 (5-room model) blink one after another.
Self-correction impossible...The LED indicators blink all at the same time.
∗ Transmission failure occurs at any of the indoor units.
∗ The indoor unit heat exchanger thermistor is disconnected.
∗ An indoor unit is in trouble (if a trouble occurs during the wiring error checking).
Emergency stop...Any of the LED indicators stays on.
pipe and the gas pipe in pairs.
again.
In this case, the memory of the microcomputer returns to its initial status (Room A wiring →
Port A piping, Room B wiring → Port B piping).
wiring error check, the prioritized room may be changed after self-correction.
3 4 5
Self-correction impossible
Self-correction complete
Service monitor PCB
Wiring error
check switch
(SW3)
(R12871)

Wiring Error Check Function

Judgment
244