2 | Troubleshooting
Service manual
39
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
2.3.38 F6-00 – Outdoor unit: Abnormal high pressure in cooling
Trigger Effect Reset
Outdoor heat exchanger
thermistor measures a
too high temperature.
Unit will NOT stop
operating.
Automatic reset when
temperature drops.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Clean the outdoor heat exchanger. See "5Maintenance"[4309].
Possible cause: Dirty outdoor heat exchanger.
2 Check that all stop valves of the refrigerant circuit are open. See
"4.2Refrigerant circuit"[4286].
Possible cause: Closed stop valve in the refrigerant circuit.
3 Perform a check of the heat exchanger thermistor. See
"3.20Thermistors"[4248].
Possible cause: Faulty heat exchanger thermistor.
4 Perform a check of all expansion valves. See "3.9Expansion valve"[4149].
Possible cause: Faulty expansion valve.
5 Perform a check of the main PCB. See "3.14Main PCB"[4171].
Possible cause: Faulty main PCB.
6 Check if the refrigerant circuit is correctly charged. See "4.2 Refrigerant
circuit"[4286].
Possible cause: Refrigerant overcharge.
7 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See "4.2Refrigerant circuit"[4286].
Possible cause: Non‑condensables and/or humidity in the refrigerant circuit.
8 Check if the refrigerant circuit is clogged. See "4.2Refrigerant circuit"[4286].
Possible cause: Clogged refrigerant circuit.
9 Perform a check of the outdoor unit fan motor. See "3.16 Outdoor unit fan
motor"[4217].
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.
2.3.39 FA-00 – Outdoor unit: Abnormal high pressure, actuation of high pressure switch
Trigger Effect Reset
Outdoor heat exchanger
thermistor measures a
too high temperature.
Unit will NOT stop
operating.
Automatic reset when
temperature drops.
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