Lennox iComfort S30 Installation And Setup Manual page 70

Initial notification of critical alerts will pop up on the home screen and will be listed under notification menu. Minor and moderate alerts are found only under the notification menu.
* Current Lennox modulating outdoor units are XC20, XP20, XC25 and XP25.
Applicable
Alert Priority
System
Code Condition
Component(s)
Inverter based
441 Moderate
outdoor unit*
442 Critical Outdoor unit
443 Critical Outdoor unit
Minor
(Escalated
to Critical
500 PureAir S
after alarm
persists for
15 minutes)
Minor
(Escalated
to Critical
501 PureAir S
after alarm
persists for
15 minutes)
502 Critical PureAir S
503 Moderate PureAir S
504 Critical PureAir S
505 Moderate PureAir S
Table 18. Alert Codes and Troubleshooting
Actual
Displayed Alert Component or System Operational State and Troubleshooting Tip
Text
Compressor slowdown due to high compressor current.
• Compressor slowdown due to high compressor current.
• Compressor current is approaching limit.
OD Inverter
• The compressor speed automatically slows.
Compressor
Slowdown • The control sets indoor CFM and outdoor RPM to values according to demand percentage
- High rather than the actual Hz.
Compressor
• Possible issue is system running at high pressures.
Current
• Check for high pressure trips or other alert codes in thermostat and outdoor control.
• Inverter LEDs will blink code 14.
• Refer to the unit service documentation for detailed troubleshooting procedures.
The top cap switch has opened five times within one hour. As a result, the outdoor unit is locked
out
.
Compressor
Top Cap Switch • This condition occurs when compressor thermal protection sensor opens five times within one
Strike Lockout
hour.
• Outdoor unit will stop.
Incorrect appliance unit size code selected.
• Check for proper configuring under unit size code used for outdoor unit (see unit configuration
MUC Unit Code
guide or in installation instructions).
to Inverter
Model Mismatch
• If replacing inverter, verify inverter model matches unit size.
• Remove the thermostat from the system while applying power and reprogramming.
Pressure sensor reports a fault for more than 5 minutes, or does not respond for more than 5
minutes.
Diff Press
Sensor Fault
Device will not perform any pressure reading calculations until fault is recovered. Remaining filter
life display will indicate "-" while fault exists.
UV sensor reports a fault for more than 5 minutes or UV sensor does not respond for more than
5 minutes.
UV Sensor
Fault
Device will not perform any UV lamp life remaining calculations until fault has recovered. Life
remaining display shall indicate "-" while fault exists.
The light is determined to be off when the last three last light intensities measurements are below
UV Lamp Off
the set threshold.
Filter life at 10% Filter life remaining determined to be <=10%, but greater than 0%
Filter Life at 0% Filter life remaining determined to be 0%
PureAir Model
Selection Model Selection jumper has changed positions.
Changed
70
How to clear alert code
Automatically clears when the
condition no longer exists.
To clear, disconnect power to
outdoor unit and restart.
Automatically clears after the
correct match is detected follow-
ing a power reset.
Automatically clears 30 seconds
after fault is recovered.
Automatically clears 30 seconds
after fault is recovered.
Light is determined on after 1 set
of five samples are above the set
threshold.
None
None
Jumper repositioned back
to original jumper position or
system rebooted.