Indoor Unit Indicators And Controls; Cassette Unit Display; Ducted Unit Display - Lennox MPA009S4S Service Manual

24. Indoor Unit Indicators and Controls

For a list of applicable error codes for the indoor units, refer to "20. Quick Reference Guide - Error Codes" on page 95. All
indoor units provide error code information with either a digital LED display or with flash codes.

24.1. Cassette Unit Display

24.2. Ducted Unit Display

ION indication lamp (optional function): This lamp illuminates when clean air feature is activated.
Defrost Indication Lamp (for cooling and heating models only): Lights up when the air conditioner starts defrosting automatically or
when the warm air controls feature is activated in heating operation.
Operation Indication Lamp: This lamp illuminates when the air conditioner is in operation.
Timer Indication Lamp: Lights up during timer operation.
Temperature Indicator: Displays the temperature settings when the air conditioner is operational. Also displays error codes.
PRE-DEF indicator(cooling and heating type)
or fan only indicator(cooling only type)
Timer indicator
Operation lamp
Temporary button
MANUAL OPERATION TIMER DEF./FAN ALARM
Figure 71. Cassette Unit Display
Figure 72. Ducted Unit Display
Alarm indicator
Infrared signal receiver
Display digital tube
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