To Next PageTo Next PageWhat to do if my Lennox Air Conditioner shows an indoor return air temperature sensor error?
If your Lennox Air Conditioner indicates an indoor return air temperature sensor error, examine the sensor and its connections.
What to do if my Lennox MWMB030S4-*P Air Conditioner has low refrigerant?
If your Lennox Air Conditioner has low refrigerant, add refrigerant according to system specifications.
What to do if my Lennox Air Conditioner has high or low voltage protection error?
If your Lennox Air Conditioner displays a high or low voltage protection error, verify the voltage supply levels and correct if required.
How to fix communication error between indoor and outdoor unit in Lennox MWMB030S4-*P?
To address a communication error between the indoor and outdoor units of your Lennox Air Conditioner, check the communication wiring and connections.
What to do if my Lennox Air Conditioner has a high water level alarm?
If your Lennox Air Conditioner is showing a high water level alarm, clear any blockage from the drain system.
How to reset outdoor current overload on Lennox MWMB030S4-*P?
If your Lennox Air Conditioner senses an outdoor current overload, reset the overload protection if it has tripped.
What to do if my Lennox MWMB030S4-*P Air Conditioner has an outdoor coil temperature sensor error?
If your Lennox Air Conditioner shows an outdoor coil temperature sensor error, inspect and verify the sensor's condition.
How to fix indoor coil temperature sensor error in Lennox MWMB030S4-*P Air Conditioner?
To address an indoor coil temperature sensor error in your Lennox Air Conditioner, check temperature sensor functionality.
How to troubleshoot IPM error on Lennox MWMB030S4-*P Air Conditioner inverter module?
To troubleshoot an IPM error on your Lennox Air Conditioner's inverter module, examine the inverter module and replace it if necessary.
What to do for compressor pressure switch issues in Lennox MWMB030S4-*P Air Conditioner?
If your Lennox Air Conditioner has a compressor high-pressure or low-pressure switch open, investigate system pressures and correct abnormalities.
General| Brand | Lennox |
|---|---|
| Model | MWMB030S4-*P |
| Category | Air Conditioner |
| Language | English |
Explains the model number structure for MCFA and MCFB ceiling/floor indoor units.
Lists valid combinations of MPA outdoor units with various indoor units for multi-zone systems.
Lists valid combinations of MPB outdoor units with various indoor units for multi-zone systems.
Outlines limitations for piping length and elevation for single-zone systems.
Outlines limitations for piping length and elevation for multi-zone systems.
Describes the features and buttons of the wireless remote control.
Details the features and buttons of the wired remote control.
Explains how to set unique addresses for indoor units connected to a centralized controller.
Guides on calculating and adding refrigerant for single-zone systems based on pipe length.
Guides on calculating and adding refrigerant for multi-zone systems based on pipe length.
Provides instructions for performing a 30-minute test run on MWDA and MWMB units.
Details how to measure winding resistance to check compressor windings and terminals.
Explains how to measure resistance to check the IPM and its components.
Provides resistance values for AC fan motor windings based on model and brand.
Guides on measuring voltage and resistance for the four-way valve to diagnose issues.
Details the process for checking the EXV by disconnecting connectors and measuring resistance.
Explains fan motor protection when speed is out of control, leading to unit stoppage and LED failure indication.
Describes inverter module protection functions against current, voltage, and temperature issues.
Explains the behavior of low voltage protection if it does not resume within 3 minutes.
Details the behavior of compressor current limit protection if it does not resume within 3 minutes.
Explains how to calculate total capacity request based on norm code, HP, modify rate, and temperature.
Outlines the conditions and timing for initiating the defrost mode.
Details the control logic and modification commands for the EXV in cooling and heating modes.
