Lennox CLIMATIC series User Manual

• 45 •CLIMATIC RT_UNITARY-IOM-1508-E
COMMUNICATION
ALARM 021, 022, 023, 024, 025, 026:
TEMPERATURE, OUT OF RANGE
ALARM 029:
AIR QUALITY, TOO HIGH
Description
The temperature measured by the probe is outside of the permitted range or the hot water system frost thermostat is activated.
• Alarm 021: the blowing air temperature is higher than the safety limit,
• Alarm 022: the blowing air temperature is lower than the safety limit,
• Alarm 023: the room air temperature is higher than the safety limit,
• Alarm 024: the room air temperature is lower than the safety limit,
• Alarm 025: the water condenser temperature is higher than the safety limit,
• Alarm 026: the water condenser temperature is lower than the safety limit.
Action
Alarms 022 / 024: No action - Alarms 025 / 026: Stop compressors
Alarm 022:
1st threshold - All compressors stop. Fresh air damper closed.
2nd threshold : If there is a hot water coil; the complete unit stops immediately. Otherwise; the unit stops after 15 minutes.
Alarm 021:
1st threshold -One compressor or heating stage stops immediately, then others progressively
2nd threshold - All the compressors and all the back-up heating stages stop
Fault displayed -
Reset
Automatic resetting of fault as soon as the temperature returns to within the permitted operating range, except 3rd safety threshold
lower limit which requires a manual reset
Possible cause(s)
• Insuffi cient airfl ow / Air damper jammed open
• Frost safety thermostat activated
• Temperature probe failed,
• Problem with wiring of probe.
Remedies
• Check the air system / Check the air damper, mechanically and electrically
• Replace probe,
• Check the connections of the probe.
Description
The air quality measured by the sensor is over of the high limit.
Action
The alarm is signalling.
Reset
The alarm is manually reset.
Possible cause(s)
• Problem with wiring connection (sensor in short circuit or disconnected),
• Sensor damaged.
Remedies
• Check the wiring connections,
• Replace the sensor.

Lennox CLIMATIC series Specifications

General

Connectivity	Wi-Fi
Compatibility	Lennox HVAC systems
User Interface	Touchscreen
Remote Access	Yes, via app
Energy Management	Energy-saving modes
Display	Color
Programmability	7-day programmable