icomfort
Touch Screen 7−Day Programmable Thermostat
Page 31
Alarm Codes and Troubleshooting
Alarm ID
Message Name
Action required to Clear/Recover
10
Unknown Device Detected − DEVICE2
Reconfigure the system. Press and hold Lennox Logo, press setup tab, press start, and press confirm. If still
persists, then check all DEVICE connections to make sure they are icomfort compatible.
11
Missing DEVICE2
Check all connections and cycle system power. If problem persists, then reconfigure the system (procedure
mentioned above).
12
Incomplete System
Thermostat did not find an Indoor Unit. Check connections and cycle power. Replace board if no response.
14
Too Many Devices of the Same Type
Thermostat found more than one outdoor unit, or more than 1 indoor unit, or more than 1 thermostat connected
to the system. Check wiring and remove duplicate equipment.
18
Low Ambient HP Heat Lockout
Notification only − Outdoor Temp is below the Low Balance Point. HP will not be used to service a Heating Call.
19
High Ambient Auxiliary Heat Lockout
Notification only − Outdoor Temp is above the High Balance Point. Indoor Unit (Furnace or Electric Heat) will not
be used to service a Heating Call.
29
Over Temperature Protection
Indoor Temp went above 99ºF during a heating or cooling call. Heating is not allowed. Check that Thermostat
Sensor is accurate. Check that Heating Equipment is not stuck ON (reversing value, etc.). Select system mode
to cooling to try and cool the indoor space.
30
Low Temperature Protection
Indoor Temp went below 40ºF. Cooling is not allowed. Check that cooling equipment is not stuck ON. Check
accuracy of the thermostat temperature. Try to heat the space to above 40ºF.
31
Lost Communication with DEVICE2
DEVICE2 is not communicating to the thermostat for more than 3 minutes. Check connections if fault persists,
then cycle power.
32
Asynchronous Reset DEVICE2
DEVICE2 is resetting by itself. Check power connections, and check 24VAC voltage at DEVICE. The alarm is
only cleared by pressing the clear button on the Installer Alerts Tab. If fault persists after checking connections,
replace board.
34
Must Program Unit Capacity for DEVICE2
DEVICE2 is missing the programmed unit capacity. Go to DEVICE2 and program unit capacity manually. See
unit IOM for instructions.
35
Incorrect Operation of DEVICE2
DEVICE2 did not follow the command of the thermostat. Check connections and cycle power.
105
Communication Problem
Equipment is unable to communicate. Check for miswired and/or loose connections and check for a high volt-
age source of noise close to the system (welder etc.).
110
Low AC Line Voltage
Line Voltage Low (Voltage lower than nameplate rating). Check voltage.
113
High AC Line Voltage
Line Voltage High (Voltage higher than nameplate rating). Check voltage.
114
AC Line Frequency/Distortion Problem
No 60 Hertz Power (Check voltage and frequency).
115
Low Secondary (24VAC) Voltage
24 Voltage Low (Range is 18 and 30 volts ). Check voltage.
116
High Secondary (24VAC) Voltage
24 Voltage High (Range is 18 and 30 volts ). Check voltage.
120
Unresponsive DEVICE2
Usually caused by delay in outdoor unit responding to indoor unit poling recycle power, check wiring.
124
Active Subnet Controller Missing
Equipment lost communication with the thermostat. Check connections and cycle power on the thermostat.
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