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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
Possible cause:
Closed stop valve in the refrigerant circuit.
2
Perform a check of the high pressure switch. See
Possible cause:
Faulty high pressure switch.
3
Perform a check of the main PCB. See
126].
Possible cause:
Faulty main PCB.
4
Check if the refrigerant circuit is correctly charged. See
Possible cause:
Refrigerant overcharge.
5
Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See
211].
Possible cause:
Non‑condensables and/or humidity in the refrigerant circuit.
6
Check if the refrigerant circuit is clogged. See
Possible cause:
Clogged refrigerant circuit.
7
Perform a check of the outdoor unit fan motor. See
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.
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