Abnormal Low Pressure (Detected By The Lps) - Daikin Sky Air R-407C Service Manual

ESIE02–01
3.4 Abnormal Low Pressure (Detected by the LPS) (E4)
E4
Error code
LED indications The table below shows the LED indications.
Operation
Normal
Malfunction
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
R(Y)P71/100/125/200/250B
Part 3 – Troubleshooting
HAP (green)
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.
H1P (red)
6
6
Abnormal
< -0.3 bar
Error Codes: Outdoor Units
H2P (red)
8 8
7 8
Reset
> +0.5 bar
1
3 3
4
5
3–41