A1-00 - Zero Cross Detection Problem; A5-00 - Outdoor Unit: High Pressure Peak Cut / Freeze Protection Problem - Daikin altherma 3 M Service Manual

2 | Troubleshooting
2.3.14 A1-00 – Zero cross detection problem
2.3.15 A5-00 – Outdoor unit: High pressure peak cut / freeze protection problem
Service manual
20
Possible cause: Faulty water temperature setting.
3 Perform a check of the 3-way valve. See
Possible cause: Faulty 3‑way valve.
4 Perform a check of the operation of the Aquastat. See
4
components" [ 307].
Possible cause: Faulty Aquastat.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Power supply
abnormality. The sinus of
the power supply crosses
the 0‑axis too often in
±10 seconds.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
2 Perform a check of the noise filter PCB. See
Possible cause: Faulty noise filter PCB.
3 Check if the power supply is conform with the regulations. See
4
circuit" [ 284].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >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.
"3.1 3-way
Effect
Unit will stop operating.
"3.14 Main
"3.15 Noise filter
Effect
Unit will stop operating.
4
valve" [ 86].
"4.4 Manufacturer
Reset
Manual reset via user
interface.
Power reset.
4
PCB" [ 171].
4
PCB" [ 194].
"4.1 Electrical
Reset
Manual reset via user
interface.
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03