Lennox icomfort Wi-Fi - Page 66

507343-01
Page 66
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
443
Critical
Outdoor unit
Incorrect appliance unit size
code selected.
 Check for proper configuring un
der unit size code used for out
door unit (see unit configuration
guide or in installation instruc
tions).
 If replacing inverter, verify inverter
model matches unit size.
 Remove the thermostat from the
system while applying power and
reprogramming.
Automatically clears af
ter the correct match is
detected following a
power reset.
530
Moderate /
Critical
IHarmony Damper
control module
Low Damper 24VAC Voltage
• Damper supply voltage is less
than 18VAC.
• Maintain non-zone mode for five
minutes after alarm clears.
Automatically clears
when the condition no
longer exists.
532
Moderate
IHarmony Damper
control module
Zoning Pressure Switch Opened
(high pressure)
 Compressor pressure is above
the specified limit.
 Compressor is turned off.
 Zoning will be restored once the
high pressure switch closes.
Automatically clears af
ter compressor pres
sure is within limits.
542
Moderate/
Critical
IHarmony Damper
control module
Zone 1 Temperature Sensor
Problem
 Zone temperature sensor reading
out of range.
 Open or short zone temperature
sensor detected for more than
five second.
 Damper control module will oper
ate in non-zone mode (all
dampers open) – moderate condi
tion.
 If after 10 minutes the condition
does not change, the priority code
is change to critical. System will
continue to operate in non-zone
mode.
Automatically clears 30
seconds after condition
no longer exist.
543
Moderate/
Critical
IHarmony Damper
control module
Zone 2 Temperature Sensor
Problem
544
Moderate/
Critical
IHarmony Damper
control module
Zone 3 Temperature Sensor
Problem
545
Moderate/
Critical
IHarmony Damper
control module
Zone 4 Temperature Sensor
Problem
594
Moderate /
Critical
Equipment inter
face module
Pre-coil discharge air tempera
ture sensor problem (DFM mode
only). Advances from moderate
to critical after ten (10) minutes.
 Interlock relay energized, but in
put not sensed after three sec
onds.
 No heating and cooling opera
tions.
 De-energize interlock relay and
re-energized five minutes later if
demand is still present.
Alarm clears five min
utes after fault clears.
600
Critical
Outdoor unit
Compressor has been cycled
OFF on utility load shedding.
 Load shedding function provides
a method for a local utility compa
ny to limit the maximum power
level usage of the outdoor unit.
 The feature is activated by apply
ing 24VAC power to the L and C
terminals on the outdoor control.
Automatically clears
when L terminal is inac
tive.