iComfort Wi-Fi
®
7-Day Programmable Communicating Thermostat
Page 49
Table 10. Alert Codes and Troubleshooting
Critical alerts are displayed on the Home screen, in the Home
owner alert button, and in the Installer alert button. Minor and
moderate alerts are found only in the Installer alert button.
Alert
Code
PRIORITY
CONDITION
APPLICABLE
SYSTEM
COMPONENTS
ALERT TEXT
COMPONENT OR SYSTEM OPERA
TIONAL STATE AND TROU
BLESHOOTING TIP
HOW TO CLEAR
ALERT CODE
180 Critical
Furnace, air han
dler or equipment
interface module
The thermostat has found a
problem with a system compo
nent's outdoor temperature
sensor.
In normal operation after system
component control recognizes
sensors, the alarm will be sent if
valid temperature reading is lost.
Compare outdoor sensor resis
tance to temperature / resistance
charts in unit installation instruc
tions.
Replace sensor pack if neces
sary.
At the beginning of (any) configu
ration, furnace, air-handler control
or equipment interface module will
detect the presence of the sen
sor(s).
If detected (reading in range), ap
propriate feature will be set as 'in
stalled' and shown in the 'About'
screen.
Automatically clears
upon configuration, or
sensing normal val
ues.
200 Critical
Furnace
The furnace roll out limit switch
is open.
Correct the cause of roll out trip.
Reset roll out switch.
Test the furnace operation.
Automatically clears
after the furnace roll
out switch is closed.
201 Critical
Furnace or air
handler
The system has lost communi
cation with the indoor unit's
blower motor.
Lost communication with indoor
blower motor.
Possible causes include power
outage, brown-out, motor not
powered, loose wiring, condensa
tion on system component control
without cover on breaker.
Problem may be on system com
ponent control or motor side.
Automatically clears
after communication is
restored.
202 Critical
Furnace or air
handler
The unit size code for the in
door unit and the size of blower
motor do not match.
Incorrect appliance unit size code
selected.
Check for proper configuring un
der unit size codes for furnace/air
handler on configuration guide or
in installation instructions.
Remove the thermostat from the
system while applying power and
reprogramming.
Automatically clears
after the correct match
is detected following a
reset.
203 Critical
Furnace or air
handler
The unit size code for the in
door unit has not been select
ed.
No system component unit size
code selected.
Check for correct configuration.
Unit size codes for furnace and
air handler are listed in the sys
tem component configuration
guide or installation instruction.
Remove the thermostat from the
system while applying power and
reprogramming.
Automatically clears
after the correct match
is detected following a
reset.
204 Critical
Furnace
There is an issue with the fur
nace gas valve.
Check gas valve operation and
wiring.
Automatically clears
after the issue is cor
rected.
205 Critical
Furnace
The furnace gas valve relay
contact is closed.
Check wiring on control and gas valve.
Automatically clears
after the issue is cor
rected.
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