Wiring-Error Check - Daikin FTKS20D3VMW Service Manual

Control Specification

3.14 Wiring-Error Check

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 right-hand panel 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.
$ For about 1 minute after the power is turned on (during initial setup).
$ For 3-minute standby period after the compressor has stopped.
$ When the outdoor air temperature is below 5°C.
$ If the indoor unit is in trouble (also in case of all-room transmission failure).
When the piping and wiring are perfect, there is no need to use this function.
Operation
1. Remove the 2 screws from the service panel (right side panel) and detach the panel.
2. Press the wiring error check switch on the service monitor PCB, and the wiring error check
3. In about 10-15 minutes, the checking will end automatically.
4. When the checking is over, the service monitor LED indicators start flashing.
Self-correction complete...The LED indicators 1 ~ 4 flash one after another.
Self-correction impossible...The LED indicators flash 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 1 ~ 4 stays on.
Note: 1. After self-correction completed, LED 3 and LED 4 are not displayed for 2 rooms, LED 4 is
2. It takes about 10-15 minutes (after pressing the wiring error check switch) to complete the
3. Wrongly connected liquid and gas pipes cannot be self-corrected either. Be sure to make the
4. To forced-terminate the wiring error check procedure halfway, press the wiring error check
5. In replacing the outdoor unit PCB, be sure to use this function.
6. Make the power slide setting after doing the wiring error checking. (Otherwise, if the wiring is
$ This function works in this way. Refrigerant is let flow from Port A and on. The temperatures
Basic Knowledge
$ With this function on, freezing (crackling) noise may be heard from the indoor unit. This is
$ The indoor fan is made to turn on and off at the same time.
98
function is activated.
LED 1 2
All flashing at once
Status
Flashing one after another
not displayed for 3 rooms.
checking. (Wrong wiring between the upper and lower units cannot be self-corrected.)
liquid pipe and the gas pipe in pairs.
switch again.
In this case, the microcomputer's memory gets back to its initial status (Room A wiring →
Port A piping, Room B wiring → Port B piping).
reversed, the air-conditioners being connected are set up in the reverse way.)
of the indoor unit heat exchanger thermistors are detected one by one to check up the
matching between the pipes and wiring.
not a problem. (This is because the heat exchange temperature is made to drop below 0°C
in order to increase the detection accuracy.)
3 4 Judgment
Self-correction impossible
Self-correction complete
SiENBE12-713
Function and Control