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MPB036S4M
Lennox MPB036S4M Service Manual
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43
7.5.
MP
A and MPB Five-Zone Refrigerant
Cycle Diagram
L
IQ
UID
VA
L
VE
A
GAS VALVE A
Indoor Coil
Outdoor Coil
COOLING
HE
AT
IN
G
T2 Evaporator
temp
.
s
en
sor
T1 R
oo
m
temp
.
s
en
sor
T3
Condenser
temp
.
s
en
sor
T4 Ambi
en
t
temp
.
s
en
sor
INDOOR
OUTDOOR
EXV A
CA
PILIARY A
CHEC
K VALVE
CA
PILIA
RY
TUBE
EXV B
CA
PILIARY B
L
IQ
UID
VA
L
VE
B
GAS VALVE B
EXV C
C
AP
ILI
ARY
C
L
IQ
UID
VA
L
VE
C
GAS VALVE C
EXV D
C
AP
ILI
ARY
D
L
IQ
UID
VA
L
VE
D
GAS VALVE D
EXV E
CA
PILIARY E
L
IQ
UID
VA
L
VE
E
GAS VALVE E
Compressor
4-WAY VALVE
T5
Di
sc
harge
temp
.
s
en
sor
Accumulator
Hi
gh pr
essu
re
switch
Lo
w
pr
essu
re
switch
42
44
Table of Contents
Default Chapter
2
Table of Contents
2
1 Single and Multiple Zone Outdoor Units
5
Model Number Identification
5
MPA Single-Zone Specifications Outdoor Units (0.75 - 1.5 Ton)
6
MPA Single-Zone Specifications Outdoor Units (2.0 - 4.0 Ton)
7
MPB Single-Zone Specifications Outdoor Units (0.75 - 1.5 Ton)
8
MPB Single-Zone Specifications Outdoor Units (2 - 4 Ton)
9
MLA Single-Zone Specifications Outdoor Units (0.75 - 2 Ton)
10
MPA Multi-Zone Specifications Outdoor Units (1.5 - 2.5 Ton)
11
MPA Multi-Zone Specifications Outdoor Units (3 - 4 Ton)
12
MPB Multi-Zone Specifications Outdoor Units (1.5 - 2.5 Ton)
13
Mpb Multi-Zone Specifications Outdoor Units (3 - 4 Ton)
14
MLA Multi-Zone Specifications Outdoor Units (1.5 - 3 Ton)
15
Single-Zone Outdoor Unit Dimensions
16
Multi-Zone Outdoor Unit Dimensions
17
Outdoor Unit Clearances
18
2 M22A, M33A and M33B Cassette Non-Ducted Indoor Units
19
Model Number Identification
19
M22A Indoor Unit Specifications
19
M33A and M33B Indoor Unit Specifications
20
M22A Indoor Unit Dimensions
21
M33A and M33B Indoor Unit Dimensions
22
M22A, M33A and M33B Indoor Unit Clearances
23
3 MMDA Ducted Indoor Units
24
Model Number Identification
24
Indoor Unit Specifications
24
Indoor Unit Blower Data
25
Indoor Unit Dimensions
28
Indoor Unit Clearances
29
4 MWMA and MWMB Wall Mounted Indoor Units
30
Model Number Identification
30
Indoor Unit Specifications (009 - 012 Ton) Units
30
Indoor Unit Specifications (018 - 030 Ton) Units
30
Indoor Unit Dimensions
31
Indoor Unit Clearances
31
5 MCFA and MCFB Ceiling / Floor Indoor Units
32
Model Number Identification
32
Indoor Unit Specifications (018 - 048 Ton) Units
32
Indoor Unit Dimensions
33
Indoor Unit Clearances
34
6 Indoor / Outdoor Unit Combinations
35
MPA Multi-Zone System Combinations
35
MPB Multi-Zone System Combinations
37
MLA Multi-Zone System Combinations
40
7 Refrigeration Pipe Work
41
MPA and MPB Single-Zone Refrigerant Cycle Diagram
41
MPA and MPB Two-Zone Refrigerant Cycle Diagram
41
MPA and MPB Three-Zone Refrigerant Cycle Diagram
42
MPA and MPB Four-Zone Refrigerant Cycle Diagram
42
MPA and MPB Five-Zone Refrigerant Cycle Diagram
43
Single-Zone Piping Limitations
44
Multi-Zone Piping Limitations
44
8 Master Valves (3- to 5-Zone Outdoor Units)
46
9 MPA, MPB and MLA Outdoor Unit Connections and Line Set Usage
47
10 Power Wiring for Outdoor and Indoor Units (Diagrams)
52
11 Outdoor Unit Diagrams
55
MPA and MPB Single-Zone
55
MLA Single-Zone
61
MPA and MPB Multi-Zone
62
MLA Multi-Zone
66
12 Indoor Unit Diagrams
68
Mwma And Mwmb Indoor Unit
68
M22A Indoor Unit
68
M33A And M33B Indoor Unit
69
Mmda Indoor Units
70
Mcfa And Mcfb Indoor Units
72
13 Control Board Photos
75
14 Condensate Pipe Work Installation
77
Outdoor Unit Condensate Piping
77
Indoor Unit Gravity Drain
78
Indoor Unit Lift Pump
79
15 Controls
82
M0STAT60Q-1 Wireless Remote
82
M0STAT61Q-1 Wired Remote
85
16 Connection to Centralized Controller
87
Set Indoor Unit Address For Centralized Control
87
Indoor Unit Connection Points For Centralized Controller
88
17 Indoor Unit Connection Points for ON/OFF Device
88
18 Indoor Unit Connection Points for Alarm Device
89
19 Start-Up
90
Adding Refrigerant - Single-Zone Systems
90
Adding Refrigerant - Multi-Zone Systems
90
Outdoor Unit Spot Check Function
91
Outdoor Unit Digital Display Tube
93
Dry Mode Operation - Mwma And Mwmb
93
Test Run - Mwda And Mwmb
93
Double-Check Pipe Connections
94
Ambient Temperature Is Below 63°F (17°C)
94
20 Quick Reference Guide - Error Codes
95
21 Single-Zone Outdoor Unit LED Locations
97
22 Multi-Zone Outdoor Unit Leds and SW1 Locations
101
23 Troubleshooting Outdoor Unit Error Codes
102
24 Indoor Unit Indicators and Controls
126
Cassette Unit Display
126
Ducted Unit Display
126
Wall-Mounted And Ceiling/Floor Unit Displays
127
25 Troubleshooting Indoor Unit Error Codes
128
26 Temperature Sensor Resistance Values
152
27 Discharge Temperature Sensor Resistance Values
153
28 Temperature Sensor Identification Table
154
29 Component Troubleshooting
154
Compressor Check
154
Ipm Check
155
Ac Fan Motor
156
Four-Way Valve
157
Exv Check
158
30 Component Protection
159
Fan Motor
159
Inverter Module Protection
159
Low Voltage Protection
159
Compressor Current Limit Protection
159
31 Specifications And Operations
160
Capacity Request Calculations
161
Heating Mode
162
Defrost Control
163
Defrost Theory
163
Defrost Termination
164
Outdoor Fan Control
164
Four-Way Valve Control
165
Electronic Expansion Valve (EXV) Control
166
32 Index
167
5
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Lennox MPB036S4M Specifications
General
Brand
Lennox
Model
MPB036S4M
Category
Air Conditioner
Language
English
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