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icomfortt 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.
table continued on next page