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Lennox MWMA024S4-*P

Lennox MWMA024S4-*P
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MINI-SPLIT SYSTEMS SERVICE MANUAL
CORP1602-L9
3/2017
Supersedes 10/2016
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss
of life.
Installation and service must be performed by a licensed professional HVAC installer (or equivalent) or service agency

Table of Contents

Other manuals for Lennox MWMA024S4-*P

Questions and Answers:

Lennox MWMA024S4-*P Specifications

General IconGeneral
EER Rating9.5
RefrigerantR-410A
Voltage208/230V
Phase1
Cooling Capacity24, 000 BTU/h
Power Supply208/230V, 1 Phase, 60 Hz
Heating Capacity24000 BTU/h

Summary

Single and Multiple Zone Outdoor Units

M22 A, M33 A and M33 B Cassette Non-Ducted Indoor Units

MMDA Ducted Indoor Units

MWMA and MWMB Wall Mounted Indoor Units

MCFA and MCFB Ceiling Floor Indoor Units

Indoor Outdoor Unit Combinations

Refrigeration Pipe Work

Power Wiring for Outdoor and Indoor Units (Diagrams)

Outdoor Unit Diagrams

Indoor Unit Diagrams

Condensate Pipe Work Installation

Controls

Connection to Centralized Controller

Set Indoor Unit Address for Centralized Control

Explains how to set unique addresses for indoor units connected to a centralized controller.

Start-Up

Adding Refrigerant - Single-Zone Systems

Provides instructions for calculating and adding refrigerant for single-zone systems.

Adding Refrigerant - Multi-Zone Systems

Details refrigerant addition for multi-zone systems based on pipe length and number of ports.

Quick Reference Guide - Error Codes

Troubleshooting Outdoor Unit Error Codes

Error Code E0: Outdoor EEPROM Malfunction

Troubleshooting steps for E0 error code indicating outdoor unit EEPROM malfunction.

Error Code E2: Communication Error Between Outdoor and Indoor Units

Troubleshooting steps for E2 error code indicating communication failure between units.

Error Code E3: Communication Error Between Outdoor Unit Main Control and IPM

Troubleshooting steps for E3 error code indicating communication issue between main control and IPM.

Error Code E4: Temperature Sensor Error

Troubleshooting for E4 error code related to temperature sensor failures (outdoor coil, ambient, compressor, indoor coil).

Error Code E5: High or Low Voltage Protection

Troubleshooting for E5 error code indicating high or low voltage protection.

Error Code E6: PFC Module Protection

Troubleshooting for E6 error code indicating PFC module protection.

Error Code E8: Outdoor DC Fan Motor Speed Error

Troubleshooting steps for E8 error code related to outdoor DC fan motor speed.

Error Codes F1, F2, F3, F4, F5 and F6: Indoor Unit Coil Temp Sensor Errors

Troubleshooting for F1-F6 error codes indicating indoor unit coil temperature sensor failures.

Error Code P1: High Pressure Switch Open

Troubleshooting for P1 error code indicating a high pressure switch fault.

Error Code P2: Low Pressure Switch Open

Troubleshooting for P2 error code indicating a low pressure switch fault.

Error Code P3: Outdoor Compressor Current Overload Sensed

Troubleshooting for P3 error code indicating outdoor compressor current overload.

Error Code P4: Compressor Discharge Temperature Sensor Error

Troubleshooting for P4 error code indicating compressor discharge temperature sensor issues.

Error Code P5: High Temperature Sensed at Outdoor Coil

Troubleshooting for P5 error code indicating high temperature at the outdoor coil.

Error Code P6: IPM Module or IGBT Over Current Protection

Troubleshooting for P6 error code indicating IPM module or IGBT over current protection.

Troubleshooting Indoor Unit Error Codes

Error Code E1: Communication Malfunction Between Indoor Unit and Outdoor Unit

Troubleshooting steps for E1 error code indicating communication failure between indoor and outdoor units.

Error Code E3: Indoor Fan Speed Error

Troubleshooting for E3 error code related to indoor fan speed errors.

Error Code E4: Indoor Return Air Temperature Sensor Error

Troubleshooting for E4 error code indicating indoor return air temperature sensor failure.

Error Code E5: Indoor Coil Temperature Sensor Error

Troubleshooting for E5 error code indicating an indoor coil temperature sensor fault.

Error Code EC: Low Refrigerant Error

Troubleshooting steps for EC error code indicating low refrigerant condition.

Error Code EE: Water-Level Alarm Malfunction

Troubleshooting for EE error code indicating water-level alarm malfunction in M22A, M33A/B, MMDA units.

Error Code F5: Outdoor Unit Fan Speed Error

Troubleshooting for F5 error code related to outdoor unit fan speed errors.

Error Code F6: Indoor Unit Evaporator Outlet Coil Temperature Sensor Faulty

Troubleshooting steps for F6 error code indicating a faulty indoor unit evaporator outlet coil temperature sensor.

Error Code P0: IPM Module or IGBT Over Current Protection

Troubleshooting for P0 error code indicating IPM module or IGBT over current protection.

Error Code P1: High or Low Voltage Protection

Troubleshooting for P1 error code indicating high or low voltage protection.

Error Code P2: Compressor Top High Temperature Protection (OLP)

Troubleshooting steps for P2 error code indicating compressor top high temperature protection.

Error Code P3: Outdoor Unit Low Temperature Lockout

Troubleshooting for P3 error code indicating outdoor unit low temperature lockout.

Error Code P4: Compressor Drive Error

Troubleshooting steps for P4 error code indicating compressor drive error.

Error Code P6: Compressor High-Pressure or Low-Pressure Switch Open

Troubleshooting for P6 error code indicating compressor high or low pressure switch is open.

Component Troubleshooting

Component Protection

Specifications and Operations

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