TROUBLESHOOTING-OUTDOOR UNIT
73
NETWORK TROUBLESHOOTING
If a network communication error code has occurred, use
the following steps to help troubleshoot the system. (For net-
work 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 switch-
es on the outdoor unit control board have been changed,
apply power to the system and see if the error codes have
cleared.
1. -
structions. Check for miswiring. (i.e. Terminal 1 and 2 is
reversed.)
NOTE: A removable plug connector is provided with the con-
trol to make thermostat wire connections. This plug may be
removed, wire connections made to the plug, and replaced.
It is strongly recommended that you do not connect more
there is a risk of the wires becoming loose, which may result
in intermittent operation.
2. Check wires for damage. (i.e. Broken wire at terminal,
broken inside wire nuts or damaged cable between
units.)
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 above.
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 net-
work. The table below indicates the LED status and the cor-
responding potential problem.
-
low indicates the LED status and the corresponding poten-
tial problem.
LEARN button – Used to reset the network. Press the button
for approximately 5 seconds to reset the network.
LED DELROLOC elbaborPnoitacidnIsutatS evitcerroCsesuaC Actions
Off Normal enoN •enoN •noitidnoc
1 Flash Communications failure
• Unknown packet is received
• Communications failure
• Depress learn button
• Verify wiring connection
2 Flash Out- of- box reset
• Control power up
• Learn button depressed
• None
Off No power Communications error
• No power to unit
• Open fuse
• Communication error
• Check circuit breakers and fuses; Re
set/Replac e 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.
1 Steady Flash No network found
• Broken/disconnected communication wire(s)
• Unit is installed as a legacy/traditional system
• Check communication wires (terminal 1/terminal 2
wires); Replace if needed
• Check installation type (legacy/tr
aditional or
communicating)
Rapid Flashing Normal network lortnoC •ciffart is “ talking” on network as expected • None
On Solid Terminal 1/Terminal 2 miss- wire
• 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)
• Check communication wires (term
inal 1/terminal 2
wires); Replace if needed
Red Communications LED Outdoor
unit control board: (H1P)
Indoor unit control board :(H2P)
Green Receive LED Outdoor unit
control board:(H2P)
Indoor unit control board:(H3P)
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