Lennox iComfort Wi-Fi Setup Manual page 59

Table 10. Alert Codes and Troubleshooting
Alert PRIORITY
Code CONDITION
417 Critical
Moderate IHarmony Damper
417
/ Critical
®
iComfort Wi-Fi
APPLICABLE
SYSTEM ALERT TEXT
COMPONENTS
The outdoor unit discharge
sensor is either open, short-cir­
Outdoor unit
cuited or the temperature is out
of sensor range.
The damper control discharge
air temperature sensor is either
open, short-circuited or the
control module
temperature is out of sensor
range.
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.
COMPONENT OR SYSTEM OPERA­
TIONAL STATE AND TROU­
BLESHOOTING TIP
•
Outdoor unit control will not per­
form demand or time / tempera­
ture defrost operation. (System
will still heat or cool.)
•
Outdoor unit control detects open
or shorted sensor, or temperature
that is out of sensor range.
•
Critical alert after 10 minutes.
•
Reset by replacing sensor.
•
This fault is detected by allowing
the unit to run for 90 seconds be­
fore checking sensor resistance.
•
If the sensor resistance is not
within range after 90 seconds, the
board will count one fault.
•
After five faults, the outdoor con­
trol will lock out.
•
Check for proper sensor reading
and attachment to line.
•
Replace outdoor control if out-of-
specifications.
•
Outdoor control will not perform
any defrost tempering – moder­
ate condition.
•
The damper control module de­
tects open or shorted discharge
sensor, or temperature that is out
of discharge sensor range.
•
Check the resistance of the dis­
charge sensor and compare to
temperature resistance chart - re­
place if needed.
•
Reset by replacing the discharge
sensor.
•
This fault is detected by allowing
the unit to run for 90 seconds be­
fore checking discharge sensor
resistance.
•
If the discharge sensor resistance
is not within range after 90 sec­
onds, the control will count one
fault.
•
After five faults, the control will
lock out – critical condition.
•
Check for proper sensor reading
and attachment to line.
7-Day Programmable Communicating Thermostat
Page 59
HOW TO CLEAR
ALERT CODE
Automatically clears
when the system de­
tects that the issue no
longer exists.
Automatically clears
after a power reset.