Lennox MPB012S4S

1
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

Lennox MPB012S4S Specifications

General

Phase	1
Cooling Capacity	12000 BTU/h
Voltage	208/230V
Power Supply	208/230V, 1 Phase, 60 Hz
Refrigerant	R410A

Summary

Single and Multiple Zone Outdoor Units

MPA Single-Zone Specifications

Provides detailed specifications for MPA single-zone outdoor units covering capacities from 0.75 to 1.5 Ton.

MPA Single-Zone Specifications (2.0 - 4.0 Ton)

Details specifications for MPA single-zone outdoor units, capacities from 2.0 to 4.0 Ton.

MPB Single-Zone Specifications (0.75 - 1.5 Ton)

Lists specifications for MPB single-zone outdoor units, capacities from 0.75 to 1.5 Ton.

MPB Single-Zone Specifications (2 - 4 Ton)

Provides specifications for MPB single-zone outdoor units, capacities from 2 to 4 Ton.

MLA Single-Zone Specifications (0.75 - 2 Ton)

Details specifications for MLA single-zone outdoor units, capacities from 0.75 to 2 Ton.

MPA Multi-Zone Specifications (1.5 - 2.5 Ton)

Specifies MPA multi-zone outdoor units for capacities 1.5 to 2.5 Ton, including AHRI ratings.

MPA Multi-Zone Specifications (3 - 4 Ton)

Lists specifications for MPA multi-zone outdoor units, capacities 3 to 4 Ton, including AHRI ratings.

MPB Multi-Zone Specifications (1.5 - 2.5 Ton)

Provides specifications for MPB multi-zone outdoor units, capacities 1.5 to 2.5 Ton.

MPB Multi-Zone Specifications (3 - 4 Ton)

Details specifications for MPB multi-zone outdoor units, capacities 3 to 4 Ton.

MLA Multi-Zone Specifications (1.5 - 3 Ton)

Specifies MLA multi-zone outdoor units for capacities 1.5 to 3 Ton, including AHRI ratings.

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

M22 A Indoor Unit Specifications

Details the specifications for M22A cassette indoor units.

M33 A and M33 B Indoor Unit Specifications

Provides specifications for M33A and M33B cassette indoor units.

MMDA Ducted Indoor Units

Indoor Unit Specifications

Lists specifications for MMDA ducted indoor units across various capacities.

MWMA and MWMB Wall Mounted Indoor Units

Indoor Unit Specifications (009 - 012 Ton) Units

Details specifications for MWMA/MWMB indoor units of 009-012 Ton capacity.

Indoor Unit Specifications (018 - 030 Ton) Units

Provides specifications for MWMA/MWMB indoor units of 018-030 Ton capacity.

MCFA and MCFB Ceiling Floor Indoor Units

Indoor Unit Specifications (018 - 048 Ton) Units

Indoor Outdoor Unit Combinations

MPA Multi-Zone System Combinations

MPB Multi-Zone System Combinations

MLA Multi-Zone System Combinations

Refrigeration Pipe Work

Outdoor Unit Diagrams

Indoor Unit Diagrams

Condensate Pipe Work Installation

Controls

M0 STAT60 Q-1 Wireless Remote

M0 STAT61 Q-1 Wired Remote

Connection to Centralized Controller

Set Indoor Unit Address for Centralized Control

Start-Up

Adding Refrigerant - Single-Zone Systems

Instructions for adding refrigerant to single-zone systems based on pipe length.

Adding Refrigerant - Multi-Zone Systems

Guidelines for adding refrigerant to multi-zone systems based on pipe length.

Outdoor Unit Spot Check Function

Test Run - MWDA and MWMB

Test Run Instructions

Provides instructions for performing a test run on MWDA and MWMB units.

Quick Reference Guide - Error Codes

Single-Zone 009012 115 VAC208-230 VAC LED Codes

Lists LED flash codes and their descriptions for single-zone outdoor units.

Single-Zone 018030 208-230 VAC Main Control Codes

Details main control LED codes for single-zone 018/030 outdoor units.

Multi-Zone Outdoor Unit Error Codes

Presents error codes for multi-zone outdoor units, including display and description.

Troubleshooting Outdoor Unit Error Codes

Component Troubleshooting

Compressor Check

Instructions for checking compressor windings resistance for shorts and terminal identification.

IPM Check

Procedure for measuring the resistance of IPM windings for proper function.

AC Fan Motor

Four-Way Valve

EXV Check

Component Protection

Fan Motor Protection

Inverter Module Protection

Low Voltage Protection

Compressor Current Limit Protection

Specifications and Operations

Capacity Request Calculations

Defrost Control

Outdoor Fan Control

Four-Way Valve Control

Electronic Expansion Valve (EXV) Control