2 | Troubleshooting
Service manual
19
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.12 8H-00 – Abnormal increase outlet water temperature
Trigger Effect Reset
Outlet water after backup
heater thermistor detects
a too high temperature
during space heating
without electrical heater.
Unit will stop operating. Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check the water circuit for an external heat source. See "4.3 Water
circuit"[4299].
Possible cause: Increased water temperature due to an external heat source.
2 Perform a check of the outlet water after backup heater thermistor. See
"3.20Thermistors"[4248].
Possible cause: Faulty outlet water after backup heater thermistor.
3 Perform a check of the backup heater. See "3.3Backup heater"[4104].
Possible cause: Faulty backup heater.
4 Perform a check of the hydro PCB. See "3.12Hydro PCB"[4160].
Possible cause: Faulty hydro PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.13 8H-03 – Overheating water circuit (thermostat)
Trigger Effect Reset
Unit detects activated
aquastat.
Pump will stop running. Automatic reset when the
circuit is closed.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check the set trigger temperature of the safety thermostat. See
"4.4Manufacturer components"[4307].
Possible cause: Faulty trigger temperature setting of the safety thermostat.
2 Check the set water temperature. See "3.21User interface"[4266].