Service manual

Error Codes: Outdoor Units ESIE03–01

3–46 Part 3 – Troubleshooting

3.5 Abnormal Low Pressure (Detected by the LPS) (E4)

Error code E4

Error generation The error is generated when the low-pressure switch is activated during compressor operation.

Causes The possible causes are:

P Malfunctioning refrigerant piping circuit

P Malfunctioning low-pressure switch

P Disconnected or broken low-pressure switch harness

P Malfunctioning low-pressure switch connector connection

P Malfunctioning outdoor unit PCB.

P Stop valve is left close

LPS settings The table below contains the preset LPS values.

Applicable units Abnormal Reset

R(Y)P71/100/125L < -0.3 bar > +0.5 bar