Daikin RZQ100B8V3B Service Manual page 211

ESIE05-03
3.5 Actuation of Low Pressure Switch: RZQ100~140 (E4)
E4
Error code
Method of The protection device circuit checks continuity in the low pressure switch.
Malfunction
Detection
Error generation The error is generated when the low-pressure switch is activated during compressor operation.
Causes The possible causes are:
LPS settings The table below contains the preset LPS values.
Applicable units
RZQ100~140
See page page 2-48 for details
Part 3 – Troubleshooting
Malfunctioning refrigerant piping circuit
Malfunctioning low-pressure switch
Disconnected or broken low-pressure switch harness
Malfunctioning low-pressure switch connector connection
Malfunctioning outdoor unit PCB
Stop valve is not opened.
Abnormal
< 1.2 bar
Error Codes: Outdoor Units
Reset
> 2 bar
3–63
1
3 3
4
5