Multizone Outdoor Unit Installation Manual

Revised 5/14/2020
10
Function of Automatic Wiring/Piping Correction
Automatic Wiring/Piping Correction Function
How To Activate This Function
Automatic
Correction Function
 Page 24 
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”, indicatomg 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.
1. Check that outside temperature is above 5
o
C.
(This function does not work when outside temperature is not above 5
o
C)
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 "C E".
Check switch
LED display
Correct
Terminal
block
Liquid/
Gas pipe
Outdoor unit
Indoor unit B
Indoor unit A
B
A
B
A
Incorrect wiring
Terminal
block
Liquid/
Gas pipe
Outdoor unit
Indoor unit B
Indoor unit A
B
A
B
A
Incorrect wiring
Terminal
block
Liquid/
Gas pipe
Outdoor unit
Indoor unit B
Indoor unit A
B
A
B
A