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TABLE 14
LED 7 Segment Status / Error Code
Press the diagnostic push button and hold it to cycle through a menu of options. Every five seconds a new menu item will be displayed.
Release the button when the desired mode is displayed.
When a solid ”P” is displayed, the furnace capacity/ size is programmed.
When the solid “E” is displayed, the control enters the Error Code Recall mode. Error Code Recall mode menu options: No change (display
ing error history) remains in Error Code Recall mode; solid “b” exits Error Code Recall mode; and solid “c” clears the error history. Must press
button while flashing “c” is displayed to clear error codes.
When the solid “-” is displayed, the control enters the Field Test mode. Field Test mode menu options: Solid “C” starts pressure switch
calibration; blinking “-” exits Field Test mode.
Code
Diagnostic Codes/Status of Equipment
Action Required to Clear and Recover
.
Idle mode (Decimal blinks at 1 Hertz -- 0.5 second ON, 0.5 second OFF).
A
Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5 second
OFF) / cfm setting for current mode displayed.
C
Cooling stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm
setting displayed / Pause / Repeat codes).
d
Dehumidification mode (1 second ON) / 1 second OFF) / cfm setting displayed /
Pause / Repeat Codes).
h
Variable Capacity Heat (1 second ON, 0.5 second OFF) / % of input rate displayed
/ Pause/ cfm setting / Pause/ Repeat codes.
H
Heat Stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm set
ting displayed / Pause / Repeat codes.
df
Defrost mode.
U
Discharge air temperature
Soft disable - Soft disabling is when thermostat finds a device on the BUS that it
does not recognize and the thermostat sends a the device a message to be in soft
disabling mode until properly configured. Two horizontal bars will display.
Steps to follow if the damper control module is displaying
the soft disable code.
1- Confirm proper wiring between all devices
(thermostat, damper control module, indoor and
outdoor).
2- Cycle power to the control that is displaying
the soft disable code.
3- Put the room thermostat through set up.
4- Go to
setup / system devices / thermostat /
edit
/ then push
reset.
5- Go to
setup / system devices / thermostat /
edit /
then push
resetAll
.
E 105
Device communication problem - No other devices on BUS (Communication
system).
Equipment is unable to communicate. Check for mis wire
and loose connections and check for a high voltage
source of noise close to the system. (welder etc.).
E 110
Low line voltage.
Line Voltage low (Voltage lower than nameplate rating)
Check voltage.
E 113
High line voltage.
Line Voltage High (Voltage higher than nameplate rating)
Check voltage.
E 114
Line voltage frequency out-of-range.
No 60 hertz power (Check voltage and frequency).
E 115
Low 24V - Control will restart if the error recovers.
24 voltage low (Range is 18 to 30 volts) Check voltage.
E 120
Unresponsive device.
Usually caused by delay in outdoor unit responding to
indoor unit poling recycle power, check wiring.
E 124
Active communicating thermostat signal missing for more than 3 minutes.
Equipment lost communication with the thermostat. Check
connections and cycle power on the thermostat.
E 125
Control failed self-check, internal error, failed hardware. Will restart if error
recovers. Integrated furnace control not communicating. Covers hardware errors
(flame sense circuit faults, pin shorts, etc.).
Hardware problem on the control board. Cycle power on
control. Replace if problem prevents service and is
persistent.
E 126
Failed internal control communication between microcontrollers.
Hardware problem on the control board. Cycle power on
control. Replace if problem prevents service and is
persistent.
E 131
Corrupted control parameters (Verify configuration of system).
Reconfigure the system. Replace board if service (heating
/cooling) is unavailable.
E 180
Outdoor air sensor failure - NO error if disconnected. Only shown if shorted or
out-of-range.
Compare outdoor sensor resistance to temperature
resistance charts in installation instructions. Replace if
necessary.
E 200
Hard lockout - Rollout circuit open or previously open.
Correct unit cause of rollout trip or replace flame rollout
switch and test furnace operation.
E 201
Indoor blower communication failure - Unable to communicate with blower motor.
Indoor blower communication failure including power
outage.
