Daikin CTXS07LVJU Service Manual page 190

Wiring Error Check Function
Details
Ex: Suppose the LED indicators are blinking as follows.
The above means that Port A is connected with Room B, and Port B with Room A (or self-corrected
this way.)
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 again.
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 wiring
178
Refrigerant flows from Port A and on. The indoor heat exchanger temperatures are detected
one by one to check up the matching between the piping and wiring.
With this function on, freezing (crackling) noise may be heard from the indoor unit. This is not a
problem. (This is because the indoor heat exchanger temperature is made to drop below 0°C
(32°F) in order to increase the detection accuracy.)
The indoor fan turns on or off during wiring checking.
The results can be checked by looking at the service monitor LED indicators, when the wiring
error checking is over. The LED indicators stop blinking when the ordinary operation starts.
LED1...Room A wiring, LED2...Room B wiring
1st blinking LED...Port A piping, 2nd blinking LED...Port B piping
The 1st blinking LED means the room that is connected with Port A. The 2nd blinking LED
means the one connected with Port B.
L
E
D
L
E
D
Outdoor unit
pipe and the gas pipe in pairs.
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).
error check, the prioritized room may be changed after self-correction.
A 1 2 3 4 5
Green Red
A 1 2 3 4 5
Green Red
A
Wiring
B
A
Piping
B
L
A 1 2 3 4 5
E
D Green Red
(R22004)
Indoor unit
Wiring
Piping
(R22274)
Trial Operation and Field Settings
SiUS121602E