T
roubleshooTing
N
t
etwork
roubleshootiNg
If a network communication error code has occurred, use the
following steps to help troubleshoot the system. (For network
communication error codes, refer to the table below and the
tables of error codes for outdoor unit and indoor unit.)
After any wiring changes have been made or DS1 dip switches
on the outdoor unit control board have been changed, apply
power to the system and see if the error codes have cleared.
1. Confirm low voltage wiring is correct per installation
instructions. Check for miswiring. (i.e. Terminal 1 and
2 is reversed.)
NOTE: A removable plug connector is provided with the
control to make thermostat wire connections (3.5 - 5.0 ton
only). This plug may be removed, wire connections made to
the plug, and replaced. It is strongly recommended that you
do not connect more than two wires into a single terminal in
the field because there is a risk of the wires becoming loose,
which may result in intermittent operation.
LED COLOR
LED Status
Red Communications LED
Outdoor unit control
1 Flash
board: (H1P)
Indoor unit control
board :(H2P)
2 Flash
Green Receive LED
1 Steady Flash
Outdoor unit control
board:(H2P)
Indoor unit control
Rapid Flashing
board:(H3P)
On Solid
Indication
Off
Normal condition
Communications failure
Out-of-box reset
No power
Off
Communications error
No network found
Normal network traffic
Terminal 1/Terminal 2 miss-wire
2. Check wires for damage. (i.e. Broken wire at terminal,
broken inside wire nuts or damaged cable betwee
nunits.)
3. Perform continuity check on wires to make sure
cable is OK. Replace the cable if necessary
4. Change both dip switches of DS1 on the outdoor unit
control board to the opposite position. See image
below.
ON*
OFF
1
2
The integrated control module has some onboard tools that
can be used to troubleshoot the network. These tools are:
red communications LED, green receive (Rx) LED, and the
learn button.
• Red communications LED – Indicates the status of the
network. The table below indicates the LED status and
the corresponding potential problem.
• Green receive LED – Indicates network traffic. The table
below indicates the LED status and the corresponding
potential problem.
• LEARN button – Used to reset the network. Press the
button for approximately 5 seconds to reset the network.
Probable Causes
• None
• Unknown packet is received
• Communications failure
• Control power up
• Learn button depressed
• No power to unit
• Open fuse
• Communication error
• Broken/disconnected communication
wire(s)
• Unit is installed as a legacy/traditional
system
• Control is "talking" on network as expected
• Terminal 1 and Terminal 2 wires reversed
at indoor unit, thermostat, or outdoor unit
• Short between terminal 1 and terminal
2 wires
• Short between terminal 1 or terminal 2 two
wires and terminal C (24VAC) or terminal
R (24VAC, COM)
43
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ASXS6S̲3P679063-2D̲ALL̲220729.pdf
DS1
(*)Default factory setting.
Corrective Actions
• None
• Depress learn button
• Verify wiring connection
• None
• Check circuit breakers and fuses; Reset/Replace if
needed
• Reset network by depressing learn button
• Check communication wires (terminal 1/terminal 2
wires); Replace if needed
• Check for shorts in low voltage wiring.
• Check communication wires (terminal 1/terminal 2
wires); Replace if needed
• Check installation type (legacy/traditional or com-
municating)
• None
• Check communication wires (terminal 1/terminal 2
wires); Replace if needed