E3-24 - High Pressure Switch Abnormality - Daikin altherma 3 M Service Manual

2 | Troubleshooting
2.3.27 E3-24 – High pressure switch abnormality
Service manual
30
5 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 286].
Possible cause: Refrigerant overcharge.
6 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See
Possible cause: Non‑condensables and/or humidity in the refrigerant circuit.
7 Check if the refrigerant circuit is clogged. See
Possible cause: Clogged refrigerant circuit.
8 Perform a check of the outdoor unit fan motor. See
4
motor" [ 217].
Possible cause: Faulty outdoor unit fan motor.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
High pressure switch
opens due to measured
pressure above high
pressure switch operating
point.
High pressure control
(measured pressure just
below high pressure
switch operating point)
occurs 16 times within
300 minutes.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the refrigerant pressure sensor. See
4
pressure sensor" [
Possible cause: Faulty refrigerant pressure sensor.
2 Perform a check of the high pressure switch. See
4
switch" [ 157].
Possible cause: Faulty high pressure switch.
3 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
4 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 286].
Possible cause: Refrigerant overcharge.
"4.2 Refrigerant circuit" [
Effect
Unit will stop operating.
244].
"3.14 Main
"4.2 Refrigerant
4
286].
"4.2 Refrigerant circuit" [
"3.16 Outdoor unit fan
Reset
Manual reset via user
interface.
"3.19 Refrigerant
"3.11 High pressure
4
PCB" [ 171].
"4.2 Refrigerant
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
4
286].