A5-00 - Outdoor Unit: High Pressure Peak Cut / Freeze Protection Problem - Daikin EBLA04E V Series Service Manual

3.3.22 A5-00 – Outdoor unit: High pressure peak cut / freeze protection problem
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
Possible cause:
▪ Faulty or disturbance of the power supply (power supply MUST be within
range of nominal operating voltage ±4%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Pressure is too high in
heating / domestic hot
water, too low in cooling.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check the water pressure. See
Possible cause: Water pressure is too low.
2 Check the water flow. See
Possible cause: Water flow is too low.
3 Check that all stop valves of the water circuit are open. See
4
circuit" [ 265].
Possible cause: Closed stop valve in the water circuit.
4 Purge the water circuit. See
Possible cause: Air in the water circuit.
5 Perform a check of the outdoor air thermistor. See "4.19 Thermistors" [
Possible cause: Faulty ambient air thermistor.
6 Perform a check of the expansion valve. See
Possible cause: Faulty expansion valve.
7 Check that all stop valves of the refrigerant circuit are open. See
"5.2 Refrigerant circuit" [
Possible cause: Closed stop valve in the refrigerant circuit.
8 Check if the refrigerant circuit is clogged. See
Possible cause: Clogged refrigerant circuit.
9 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 256].
Possible cause: Refrigerant overcharge or shortage.
10 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.
Effect
Unit will stop operating.
"5.3 Water circuit" [
4
"5.3 Water circuit" [
"5.3 Water circuit" [
"4.9 Expansion
4 256].
"5.2 Refrigerant
4
"5.2 Refrigerant circuit" [
draft – 31/05/2022 15:53
3 | Troubleshooting
Reset
Manual reset via user
interface.
4
265].
265].
"5.3 Water
4
265].
4
4
valve" [ 162].
4
circuit" [ 256].
"5.2 Refrigerant
256].
Service manual
217].
33