Lennox iComfort Wi-Fi Setup Manual page 66

Table 10. Alert Codes and Troubleshooting
Alert PRIORITY
Code CONDITION
Critical
443
Moderate /
IHarmony Damper
530
Critical
IHarmony Damper
Moderate
532
Moderate/
IHarmony Damper
542
Critical
Moderate/ IHarmony Damper
543
Critical
Moderate/ IHarmony Damper
544
Critical
Moderate/ IHarmony Damper
545
Critical
Moderate /
594
Critical
Critical
600
507343-01
APPLICABLE
SYSTEM
COMPONENTS
Incorrect appliance unit size
Outdoor unit
code selected.
Low Damper 24VAC Voltage
control module
Zoning Pressure Switch Opened
control module
(high pressure)
Zone 1 Temperature Sensor
control module
Problem
Zone 2 Temperature Sensor
control module
Problem
Zone 3 Temperature Sensor
control module
Problem
Zone 4 Temperature Sensor
control module
Problem
Pre-coil discharge air tempera­
Equipment inter­ ture sensor problem (DFM mode
only). Advances from moderate
face module
to critical after ten (10) minutes.
Compressor has been cycled
Outdoor unit
OFF on utility load shedding.
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
ALERT TEXT
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Page 66
TIONAL STATE AND TROU­
BLESHOOTING TIP
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.
Damper supply voltage is less
than 18VAC.
Maintain non-zone mode for five
minutes after alarm clears.
Compressor pressure is above
the specified limit.
Compressor is turned off.
Zoning will be restored once the
high pressure switch closes.
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.
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.
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.
HOW TO CLEAR
ALERT CODE
Automatically clears af­
ter the correct match is
detected following a
power reset.
Automatically clears
when the condition no
longer exists.
Automatically clears af­
ter compressor pres­
sure is within limits.
Automatically clears 30
seconds after condition
no longer exist.
Alarm clears five min­
utes after fault clears.
Automatically clears
when L terminal is inac­
tive.