Name: Lennox MPA012S4S-1L
Brand: Lennox
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Lennox Mini-Split Service Manual / Page 143

E0 Fault Code

Basic Description:

Outdoor EEPROM malfunction.

General Note:

PCB main chip does not receive feedback from EEPROM chip. EEPROM: a read-only

memory whose contents can be erased and reprogrammed using a pulsed voltage.

For the location of EEPROM chip, please refer to the below photos.

Table of Contents3
Section 1 - Outdoor Unit Data9
Section 1.1 - Mpa Single Zone Condensing Units10
- Model Number Identification11
- Specifications - 0.75 - 1 Ton Mpa Outdoor Units - 115V-1 Phase12
- Specifications - 0.75 - 1.5 Ton Mpa Outdoor Units - 208/230V-1 Phase13
- Specifications - 2 - 4 Ton Mpa Outdoor Units - 208/230V-1 Phase14
Section 1.2 - Mpa Multi-Zone Condensing Unit15
- Specifications - 1.5 - 2.5 Ton Mpa Outdoor Units16
- Specifications - 3 - 4 Ton Mpa Outdoor Units17
Section 2 - Indoor Unit Data18
Section 2.1 - M22A Compact Cassette Unit19
- Model Number Identification20
- Specifications - Cassette Indoor Units - M22A009-01821
- Sound Data22
- Air Throw Data23
Section 2.2 - M33A Cassette Unit24
- Model Number Identification25
- Specifications - Cassette Indoor Units - M33A024-04826
Section 2.3 - Mmda Ducted Unit27
- Model Number Identification28
- Specifications - Medium Static Ducted Indoor Units - 009-01829
- Specifications - Medium Static Ducted Indoor Units - 024-04829
- Blower Data30
Section 2.4 - Mwma Wall Mounted Unit33
- Model Number Identification34
- Specifications - Wall-Mounted Indoor Units - 009-01235
- Specifications - Wall-Mounted Indoor Units - 018-03035
Section 2.5 - Mcfa Ceiling/Floor Unit36
- Model Number Identification37
- Specifications - Ceiling/Floor Mount Indoor Units - 012-02438
- Specifications - Ceiling/Floor Mount Indoor Units - 036-04838
Section 3 - Installation Dimensions of Outdoor Units39
Section 3.1 - Single Zone Installation Dimensions40
- MPA009S4S, MPA012S4S, MPA018S4S Dimensions41
- MPA024S4S, MPA030S4S, MPA036S4S Dimensions42
- MPA048S4S Dimensions43
Section 3.2 - Multi-Zone Installation Dimensions44
- MPA018S4M Dimensions45
- MPA030S4M, MPA036S4M Dimensions46
- Front View46
- MPA048S4M Dimensions47
Section 3.3 - Mpa Outdoor Unit Clearances48
- Outdoor Unit Clearances49
Section 4 - Installation Dimensions of Indoor Units50
Section 4.1 - M22A Compact Cassette51
Section 4.2 - M33A Cassette Unit54
Section 4.3 - Mmda Ducted Unit57
Section 4.4 - Mwma Wall Mounted Unit60
Section 4.5 - Mcfa Ceiling/Floor Unit63
Section 5 - Indoor Unit Combinations66
- Multi-Zone System Combinations67
- Multi-Zone System Combinations69
Section 6 - Refrigeration Pipe Work70
Section 6.1 - Single Zone Refrigerant Cycle Diagram71
Section 6.2 - Multi-Zone Refrigerant Cycle Diagram73
Section 6.1 - Refrigeration Pipe Work for Singe Zone Systems78
- Piping Limitations79
Section 6.2 - Refrigeration Pipe Work for Multi-Zone Systems80
- Connections and Line Set Usage82
- Connections and Line Set Usage83
- Connections and Line Set Usage84
Section 7 - Power Wiring for Outdoor & Indoor Units85
Section 8 - Data Wiring86
036 & 048 Sizes Only86
Section 9 - Wiring Diagrams87
Section 9.1 - Single Zone Wiring Diagrams88
- 115V MPA009S4S-1L and MPA012S4S-1L Outdoor Unit Wiring Diagram89
- 208/230V MPA009S4S-1P and MPA012S4S-1P Outdoor Unit Wiring Diagram89
- Vmpa018S4S-1P90
- 208/230V MPA024S4S-1P Outdoor Unit Wiring Diagram90
- 208/230V MPA030S4S-1P Outdoor Unit Wiring Diagram91
- 208/230V MPA036S4S-1P Outdoor Unit Wiring Diagram92
- 208/230V MPA048S4S-1P Outdoor Unit Wiring Diagram93
Section 9.1 - Multi-Zone Wiring Diagrams94
- 208/230V MPA018S4M-1P Outdoor Unit Wiring Diagram95
- 208/230V MPA030S4M-1P Outdoor Unit Wiring Diagram95
- MPA036S4M-1P Outdoor Unit Wiring Diagram96
- MPA048S4M-1P Outdoor Unit Wiring Diagram96
Section 9.1 - Indoor Unit Wiring Diagrams97
- MWMA Unit Wiring Diagram98
- M22A009S4-1P, M22A012S4-1P, M22A018S4-1P, M33A024S4-1P Unit Wiring Diagram99
- M33A036S4-1P & M33A048S4-1P Unit Wiring Diagram100
- MMDA024S4-1P Ducted Units Wiring Diagram101
- MMDA036S4-1P & MMDA048SA-1P Ducted Units Wiring Diagram101
- MMDA009S4-1P, MMDA012S4-1P, MMDAA018S4-1P Ducted Units Wiring Diagram102
- MCFA024S4-1P Unit Wiring Diagram103
- MCFA036S4-1P Unit Wiring Diagram103
- MCFA048S4-1P Unit Wiring Diagram104
Section 10 - Condensate Pipe Work Installation Data105
Section 10.1 - Outdoor Unit Condensate Pipe106
- Condensate Piping Requirements - Outdoor Unit107
Section 10.2 - Indoor Unit Gravity Drain108
- Condensate Piping Requirements - MWMA & MCFA109
Section 10.3 - Indoor Unit Lift Pump110
- Condensate Piping Requirements - MMDA & M22A/M33A111
- Mmda111
- M22A and M33A112
Section 11 - Controls113
Section 11.1 - M0Stat60Q Wireless Controller114
Section 11.2 - M0Stat61Q-1 Wired Controller117
Section 12 - Start up119
Section 12.1 - General Start up Information120
- Outdoor Unit Spot Check Function121
- Outdoor Unit's Digital Display Tube125
Section 13 - Fault Codes126
Section 13.1 - Quick Reference Guide - Fault Codes128
- Single Zone 009/012 115VAC/208-230VAC Outdoor Units Quick Reference129
- Single Zone 018/030 208-230VAC Outdoor Units Quick Reference130
- Multi-Zone Outdoor Units Quick Reference131
- Indoor Unit Fault Code Units Quick Reference for ALL Indoor Units132
Section 13.2 - Troubleshooting Single Zone Outdoor Units133
Section 13.3 - Troubleshooting Multi-Zone Outdoor Units140
- E0 Fault Code143
- E0 Flow Chart144
- E2 Fault Code145
- E2 Flowchart146
- E3 Fault Code149
- E3 Flow Chart150
- E4 Fault Code152
- E4 Flow Chart153
- E5 Fault Code154
- E5 Flow Chart155
- E6 Fault Code160
- E6 Flow Chart161
- E8 Fault Code164
- E8 Flow Chart165
- F1 Fault Code168
- F1 Flow Chart169
- F2 Fault Code170
- F2 Flow Chart171
- F3 Fault Code172
- F3 Flow Chart173
- F4 Fault Code174
- F4 Flow Chart175
- F5 Fault Code176
- F5 Flow Chart177
- F6 Fault Code178
- P1 Fault Code179
- P1 Flow Chart180
- P2 Fault Code182
- P2 Flow Chart183
- P3 Fault Code185
- P3 Flow Chart186
- P4 Fault Code188
- P4 Flow Chart189
- P5 Fault Code190
- P5 Flow Chart191
- P6 Fault Code192
- P6 Flowchart193
Section 13.4 - Indoor Unit Fault Codes194
- E0 Fault Code197
- E0 Flowchart198
- E1 Fault Code199
- E1 Flow Chart200
- E3 Fault Code202
- E3 Flow Chart203
- E4 Fault Code204
- E4 Flow Chart205
- E5 Fault Code206
- E5 Flow Chart207
- EC Fault Code208
- EC Flow Chart209
- EE Fault Code210
- EE Flow Chart211
- F0 Fault Code212
- F0 Flow Chart213
- F1 Fault Code214
- F1 Flow Chart215
- F2 Fault Code216
- F2 Flow Chart217
- F3 Fault Code218
- F3 Flow Chart219
- F4 Fault Code220
- F4 Flow Chart221
- F5 Fault Code222
- F5 Flow Chart223
- F6 Fault Code224
- F6 Flow Chart225
- P0 Fault Code226
- P0 Flowchart227
- P1 Fault Code228
- P1 Flow Chart229
- P3 Fault Code230
- P3 Flow Chart231
- P4 Fault Code232
- P4 Flow Chart233
- P5 / -- Fault Code234
- P6 Fault Code235
- P6 Flow Charts236
- P7 Fault Code239
- P7 Flow Chart240
- Temperature Sensor Resistance Value Table (°C--K)241
- Appendix 1241
- Discharge Temperature Sensor Table (°C--K)242
- Appendix 2242
- Celsius to Fahrenheit Conversion Table243
- Appendix 3243
- Compressor Check244
- IPM Check245
- AC Fan Motor246
- 4-Way Valve247
- EXV Check248
- Low Voltage Protection251
- Compressor Current Limit Protection251
- Electronic Functions Abbreviations252
- Electronic Control Working Environment252
- Main Protection252
- Compressor Preheating Functions253
- Compressor Crankcase Heater253
- Capacity Request Calculation254
- Defrost Control256
- Outdoor Fan Control257
- Four-Way Valve Control258
- Electronic Expansion Valve (EXV) Control258

Lennox MPA012S4S-1L User Manual

Table of Contents

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Lennox MPA012S4S-1L Specifications

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Brand	Lennox
Model	MPA012S4S-1L
Category	Air Conditioner
Language	English