Service manual

Error Codes: Outdoor Units ESIE03–01

3–44 Part 3 – Troubleshooting

3.4 Abnormal High Pressure (Detected by the HPS) (E3)

Error code E3

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

Causes The possible causes are:

P Abnormal high pressure caused by too much refrigerant or by non-condensable gas (air or

nitrogen)

P Inaccuracy of the high-pressure switch

P Broken or disconnected high-pressure switch harness

P Malfunctioning high-pressure switch connector connection

P Malfunctioning outdoor unit PCB

P Malfunctioning refrigerant piping circuit

P Indoor unit air filter is clogged (Heat mode)

P Outdoor heat exchanger dirty (Cool mode)

P Outdoor fan malfunction (Cool mode)

P Stop valves remained close

HPS settings The table below contains the preset HPS values.

Applicable units Abnormal Reset

R(Y)P71/100/125L > 33 bar < 25.5 bar