Amana AVXC20 Series Service Instructions Manual page 73

TROUBLESHOOTING
ClimateTalk PCB LED Transmitted
Fault Code Display ClimateTalk Message
11 E11 RUN SYS TEST
N T
ETWORK ROUBLESHOOTING
Communications is achieved by taking the difference between a
positive dc signal and a negative dc signal. The positive dc signal
is termed "data 1" or "1'. Data 1 is positive with respect to ground
(or common). The negative dc signal is termed "data 2" or "2".
Data 2 is negative with respect to ground (or common).
Data 1 should be approximately 2.8 volts dc. Data 2 should be
approximately 2.2 volts dc. The voltage difference between data 1
and data 2 should be approximately 0.6 volts dc.
Verify that the bus DS1 dip switches are in the ON position.
OFF ON
1
2
LED color LED Status
Red Communications LED 1 Flash
(H1P)
2 Flash
Green Receive LED
1 Steady Flash
(H2P)
Rapid Flashing
On Solid
Thermostat Fault
Items below are messages only displayed on the thermostat screen.
This test is required at startup. Installer should
navigate to the ComforrtNet User Menu, choose Air
Conditioner, then EQUIP TEST and SYSYTEM
TEST. Selecting ON will run the required test.
Display will clear once testing is complete.
TERM
Indication
Off Nominal condition
Communications Failure
Out-of-box reset
No power
Off
Communications error
No network found
Nominal network traffic
Data 1/Data 2 miss-wire
OUTDOOR UNIT ERROR CODES
Probable Causes
● Incomplete SYSTEM TEST
● SYSTEM TEST is running
The ComfortNet™ system is a fully communicating system, consti-
tuting a network. Occasionally the need to troubleshoot the net-
work may arise. The integrated control module has some on-
board 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. Depress the button
for approximately 5 seconds to reset the network.
Probable Causes
● None
● Unknown packet is received
● Control power up
● Learn bu on depressed
● No power to Outdoor unit
● Open fuse
● Communica on error
● Broken/ disconnected communica on wire(s)
● AC is installed as a legacy/ tradi onal system
● Control is "talking" on network as expected
● Data 1 and data 2 wires reversed at indoor unit,
thermostat, or outdoor unit
● Short between data 1 and data 2 wires
● Short between data 1 or data 2 wires and R (24VAC) or
C (24VAC common)
Corrective Actions
MESSAGE ONLY
Corrective Actions
● none
● Depress learn bu on
● None
● Check circuit breakers and fuses; Replace if
needed
●Reset network by depressing learn bu on
● Check communica on wires (data 1/ data 2
wires); Replace if needed
● Check communica on wires (data 1/ data 2
wires); Replace if needed
● Check installa on type (legacy/ tradi onal or
communicating)
● Check data 1/ data 2 voltages
● none
● Check communica on wires (data 1/ data 2
wires); Replace if needed
● Check data 1/ data 2 voltages
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