Lennox MPB018S4M User Manual

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19.4. OutdoorUnitDigitalDisplayTube ............................................................................................................................... 93
19.5. DryModeOperation-MWMAandMWMB ................................................................................................................. 93
19.6. TestRun-MWDAandMWMB .................................................................................................................................... 93
19.7. Double-CheckPipeConnections ................................................................................................................................ 94
19.8. 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
24.1. CassetteUnitDisplay ................................................................................................................................................ 126
24.2. DuctedUnitDisplay................................................................................................................................................... 126
24.3. 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IdenticationTable........................................................................... 154
29. Component Troubleshooting .............................................................................................. 154
29.1. CompressorCheck ................................................................................................................................................... 154
29.2. IPMCheck ................................................................................................................................................................. 155
29.3. ACFanMotor ............................................................................................................................................................ 156
29.4. Four-WayValve ......................................................................................................................................................... 157
29.5. EXVCheck ................................................................................................................................................................ 158
30. Component Protection ........................................................................................................ 159
30.1. FanMotor .................................................................................................................................................................. 159
30.2. Inverter Module Protection ........................................................................................................................................ 159
30.3. LowVoltageProtection ............................................................................................................................................. 159
30.4. CompressorCurrentLimitProtection ........................................................................................................................ 159
31. SpecicationsandOperations ........................................................................................... 160
31.1. CapacityRequestCalculations ................................................................................................................................. 161
31.2. DefrostControl .......................................................................................................................................................... 163
31.3. DefrostTheory .......................................................................................................................................................... 163
31.4. DefrostTermination ................................................................................................................................................... 164
31.5. OutdoorFanControl ................................................................................................................................................. 164
31.6. Four-WayValveControl ............................................................................................................................................ 165
31.7. Electronic Expansion Valve (EXV) Control ................................................................................................................ 166
32. Index ..................................................................................................................................... 167

Lennox MPB018S4M Specifications

General

Brand	Lennox
Model	MPB018S4M
Category	Air Conditioner
Language	English