Carrier 38QUS018DS2-2 Installationshandbuch Seite 24

10. FUNCTUON OF AUTOMATIC WIRING/PIPING CORRECTION
10.1 Automatic Wiring/Piping Correction Function
More recent models now feature automatic correction of wiring/piping errors. Press the
"check switch" on the outdoor unit PCB board for 5 seconds until the LED displays "CE",
indicating that this function is working, Approximately 5-10 minutes after the switch is
pressed, the "CE" disappears, meaning that the wiring/piping error is corrected and all
wiring/piping is properly connected.
10.2 How To Activate This Function
1. Check that outside temperature is above 5℃.
(This function does not work when outside temperature is not above 5℃)
2. Check that the stop valves of the liquid pipe and gas pipe are open.
3. Turn on the breaker and wait at least 2 minutes.
4. Press the check switch on the outdoor PCB board unit LED display "CE".
GB-23 7
Correct wiring
Terminal
block
Liquid/
Gas pipe
Outdoor unit
Incorrect wiring
Terminal
block
Liquid/
Gas pipe
Outdoor unit
Incorrect wiring
Terminal
block
Liquid/
Gas pipe
Outdoor unit
B
A
Indoor unit B
B
A
Indoor unit A
B
A
Indoor unit B
B
A
Indoor unit A
B
A
Indoor unit B
B
A
Indoor unit A
Check switch
LED display