Carrier 38MBR series Service Manual

Also see for 38MBR series: Service manual

Contents

19DIAGNOSTIC GUIDESTable 10—Diagnostic Guides Indoor UnitsOPERATION LAMP TIMER LAMP DISPLAY LED STATUS☆ 1 time X E0 Indoor unit EEPROM parameter error☆ 2 times X E1 Communication malfunction between indoor and outdoor units☆ 4 times X E3 Indoor fan speed malfunction☆ 5 times X E4 Indoor room temperature sensor (T1 ) malfunction☆ 6 times X E5 Evaporator coil temperature sensor (T2) malfunction☆ 7 times X EC Refrigerant leakage detection☆ 8 times X EE Water-level alarm malfunction☆ 1 time O F0 Current overload protection☆ 2 times O F1 Outdoor ambient temperature sensor (T4 ) malfunction☆ 3 times O F2 Condenser coil temperature sensor (T3) malfunction☆ 4 times O F3 Compressor discharge temperature sensor (T5) malfunction☆ 5 times O F4 Outdoor unit EEPROM parameter error☆ 6 times O F5 Outdoor fan speed malfunction☆ 7 times O F6 Indoor coil outlet pipe sensor(Located on outdoor unit low pressure valve)☆ 8 times O F7 Communication malfunction between the cassette optional lift panel and the unit☆ 9 times O F8 Cassette optional lift panel malfunction☆ 10 times O F9 Cassette optional lift panel not closed☆ 1 time ☆ P0 Inverter module (IPM) malfunction☆ 2 times ☆ P1 Over-voltage or under-voltage protection☆ 3 times ☆ P2 Compressor top high temperature protection (OLP)☆ 4 times ☆ P3 Low ambient temperature cut off in heating☆ 5 times ☆ P4 Compressor drive malfunction☆ 6 times ☆ P5 Indoor units mode conflict☆ 7 times ☆ P6 Low pressure protection☆ 8 times ☆ P7 Outdoor IPM temperature sensor errorO（light） X（off） ☆（flash）