Sinclair SMF-C18AI, SMF-4E27AI, SMF-C12AI Outdoor unit LED display function, Check function

7.9 Outdoor unit LED display function:

1.When stand-by it display number of indoor unit online;

2.When operation it display frequency of outdoor unit;

3.When defrost it display “df”;

4.When a protection or error occurred, it display as the following table:

Display	Explanation
E0	EEPROM error
E1	No 1 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective
E2	No 2 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective
E3	No 3 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective
E4	Outdoor temp. sensor or connector of temp. sensor is defective
E5	Compressor voltage protection
E6	No 4 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective
E7	Indoor and outdoor communication error
P0	Compressor top protection against temperature
P1	High pressure protection
P2	Low pressure protection
P3	Compressor current protection
P4	Inverter module protection
P5	Outdoor low temp. protection
P6	Condenser high-temperature protection

7.10 Check function:

There is a check button on outdoor pcb. When push this button, the outdoor LED can display in sequence:

Capacity demand→Running mode →revised capacity → fan state →No.1 evaporator pipe temp. →No.2 evaporator pipe temp.→No.3 evaporator pipe temp.→No.4 evaporator pipe temp.→outdoor pipe temp. → Outdoor temp. →discharge gas temp.→current of outdoor unit → No. 1 opening degree of electronic expansion valve → No. 2 opening degree of EXV → No. 3 opening degree of EXV→No. 4 opening degree of EXV→indoor unit number→last protection/error code→capacity demand(cycle)

Explanation for the some display content:

1. Running mode:

Display Corresponding mode

0Off

1Cooling mode

2Heating mode

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