To Next PageTo Next PageWhat to do if my Lennox Air Conditioner shows an outdoor EEPROM malfunction?
If your Lennox Air Conditioner displays an outdoor EEPROM malfunction, try these steps: * Power off the unit, then restart it after 3 minutes. * If the issue persists, the outdoor main PCB may need to be replaced.
What to do if my Lennox Air Conditioner shows a communication error E2?
If your Lennox Air Conditioner is showing a communication error (E2 for outdoor code) between the indoor and outdoor units, the first step is to check the wiring and connections between these units to ensure they are secure and properly connected.
What to do if my Lennox Air Conditioner has low refrigerant?
If your Lennox Air Conditioner is experiencing a low refrigerant issue, contact a qualified technician to check for leaks.
What to do if my Lennox Air Conditioner has an outdoor coil temperature sensor error (T3)?
If your Lennox Air Conditioner's outdoor coil temperature sensor (T3) is showing an error, check the sensor connections and condition.
How to fix a Lennox Air Conditioner compressor discharge temperature sensor error (T5)?
If your Lennox Air Conditioner's compressor discharge temperature sensor (T5) is showing an error, examine the sensor and its wiring.
How to troubleshoot an indoor fan speed error on my Lennox MMDA048S4-*P?
If the Lennox Air Conditioner displays an indoor fan speed error, inspect the fan motor and connections.
What to do if my Lennox MMDA048S4-*P Air Conditioner shows an indoor coil temperature sensor error?
If your Lennox Air Conditioner has an indoor coil temperature sensor error, inspect the sensor for damage.
How do I fix an indoor return air temperature sensor error on my Lennox MMDA048S4-*P Air Conditioner?
If your Lennox Air Conditioner has an indoor return air temperature sensor error, check the sensor and its wiring.
General| Brand | Lennox |
|---|---|
| Model | MMDA048S4-*P |
| Category | Air Conditioner |
| Language | English |
Details technical specifications for MPA single-zone outdoor units from 0.75 to 1.5 tons.
Details technical specifications for MPA multi-zone outdoor units from 1.5 to 2.5 tons.
Lists key technical specifications for MMDA indoor units.
Lists valid indoor/outdoor unit combinations for MPA multi-zone systems.
Procedures for adding refrigerant to single-zone systems.
Procedures for adding refrigerant to multi-zone systems.
Procedure to measure compressor winding resistance.
Procedure to measure IPM resistance values.
Procedure to measure AC fan motor winding resistance.
Steps to test the four-way valve voltage and resistance.
Details EXV connector pin-out and resistance measurement.
Explains how to calculate system capacity based on indoor/outdoor conditions.
Details the conditions and logic for initiating and terminating defrost mode.
Explains how outdoor fan speed is selected based on ambient temperature.
Describes the operation and control logic of the Electronic Expansion Valve.
