TroubleshootingIf an error occurs during the operation, it is displayed on the outdoor unit PCB.E-30SEG 1, 2 SEG 3, 4 ExplanationDisplayHigh temperature of Discharge (Protection control)SUMP COMP DOWNReverse phase error (Protection control)COMP DOWN due to frozen Eva of indoor unitError of momentary power failure (disappears when the unit is Off/On)Compressor Down due to protection control of high pressure sensorCompressor Down due to protection control of low pressure sensorIn removing frostCompressor Down due to protection control of condensation ratioError of OUT TEMP sensor (OPEN/SHORT)Error level: Over 4.9V(-50°C), below 0.4V(93°C)Error of COND TEMP sensor (OPEN/SHORT)Error level: Over 4.9V(-50°C), below 0.4V(93°C)Error of PWM Discharge TEMP sensor (OPEN/SHORT)Detected when the outdoor temperature is over -10°CError level: Over 4.95V(-30°C), below 0.5V(151°C)Error of liquid refrigerant pipe(cond out) TEMP (OPEN/SHORT)Error level: Over 4.9V(-50°C), below 0.4V(93°C)Error of OIL TEMP sensor (OPEN/SHORT)Detected when the outdoor temperature is over -10°CError level: Over 4.95V(-30°C), below 0.5V(151°C)Error of SUCTION TEMP sensor (OPEN/SHORT)Error level: Over 4.9V(-50°C), below 0.4V(93°C)Error of high pressure sensor (OPEN/SHORT)Detected when the compressor is onSHORT error when below 0.4V, OPEN error when over 4.2VError of low pressure sensor (OPEN/SHORT)Detected when the compressor is onSHORT error when below 0.4V, OPEN error when over 4.7VError of fixed compressor discharge sensor (OPEN/SHORT)System Down caused by communication error after completion of trackingMismatching of the indoor unit numbers set with those communicated after completion of trackingError of float switch in indoor unitError of setting option switches for optional accessoriesOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFError about protectioncontrol of outdoor unitErrors about outdoor unitsensor (OPEN/SHORT)Communication errorsRemark