Daikin RXTA30B2V1B, Service Manual

Page: 23 / 264

3 | Troubleshooting
Service manual
23
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
3.5.10 E3-00 – Outdoor unit: Actuation of high pressure switch
Trigger Effect Reset
High pressure switch
opens due to measured
pressure above high
pressure switch operating
point. Unit will stop operating. Manual reset via user
interface.
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 Check that all stop valves of the refrigerant circuit are open. See
"5.2 Refrigerant circuit" [ 4 211].
Possible cause: Closed stop valve in the refrigerant circuit.
2 Perform a check of the high pressure switch. See "4.6 High pressure
switch" [
4
83].
Possible cause: Faulty high pressure switch.
3 Perform a check of the main PCB. See "4.14 Main PCB" [
4
126].
Possible cause: Faulty main PCB.
4 Check if the refrigerant circuit is correctly charged. See "5.2 Refrigerant
circuit" [
4
211].
Possible cause: Refrigerant overcharge.
5 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See
"5.2 Refrigerant circuit" [ 4 211].
Possible cause: Non‑condensables and/or humidity in the refrigerant circuit.
6 Check if the refrigerant circuit is clogged. See "5.2 Refrigerant circuit" [
4
211].
Possible cause: Clogged refrigerant circuit.
7 Perform a check of the outdoor unit fan motor. See "4.15 Outdoor unit fan
motor" [
4
135].
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.