Carrier 38MBQ Series Service Manual page 17

DIAGNOSTIC GUIDES
OPERATION LAMP TIMER LAMP
☆ 1 time
☆ 2 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 7 times
☆ 8 times
☆ 1 time
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 7 times
☆ 8 times
☆ 9 times
☆ 10 times
☆ 1 time
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 7 times
☆ 8 times
Table 14—Diagnostic Guides Indoor Units
DISPLAY
X E0 Indoor unit EEPROM parameter error
X E1 Communication malfunction between indoor and outdoor units
X E3 Indoor fan speed malfunction
X E4 Indoor room temperature sensor (T1 ) malfunction
X E5 Evaporator coil temperature sensor (T2) malfunction
X EC Refrigerant leakage detection
X EE Water-level alarm malfunction
O F0 Current overload protection
O F1 Outdoor ambient temperature sensor (T4 ) malfunction
O F2 Condenser coil temperature sensor (T3) malfunction
O F3 Compressor discharge temperature sensor (T5) malfunction
O F4 Outdoor unit EEPROM parameter error
O F5 Outdoor fan speed malfunction
O F6 Indoor coil outlet pipe sensor(Located on outdoor unit low pressure valve)
O F7 Communication malfunction between the cassette optional lift panel and the unit
O F8 Cassette optional lift panel malfunction
O F9 Cassette optional lift panel not closed
☆
P0 Inverter module (IPM) malfunction
☆
P1 Over-voltage or under-voltage protection
☆
P2 Compressor top high temperature protection (OLP)
☆
P3 Low ambient temperature cut off in heating
☆
P4 Compressor drive malfunction
☆
P5 Indoor units mode conflict
☆
P6 Low pressure protection
☆
P7 Outdoor IPM temperature sensor error
O（light）
LED STATUS
☆（flash）
X（off）
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