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3
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Troubleshooting
Service manual
31
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
3.3.18 8H-01 – Overheating mixed water circuit
Trigger
Effect
Reset
Water temperature in the
mixed circuit is too high.
Unit will not stop
operating.
Automatic reset.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Perform a check of the outlet water thermistor bizone. See
217].
Possible cause:
Faulty outlet water thermistor for bizone.
2
Check the field setting [9‑00]. See
Possible cause:
Mixed water temperature >[9‑00] 5K.
3
Perform a check of the domestic hot water/space heating 3-way valve of the
unit. See
99].
Possible cause:
Faulty 3‑way valve.
4
Perform a check of the 3-way valve of the bizone kit. See documentation of
the bizone kit.
Possible cause:
Faulty 3‑way valve.
5
Perform a check of the bizone kit PCB. See documentation of the bizone kit.
Possible cause:
Faulty bizone kit PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
3.3.19 8H-02 – Overheating mixed water circuit (thermostat)
Trigger
Effect
Reset
Thermal protector Q3L in
mixed circuit is activated.
Unit will stop operating.
Automatic reset after
reset of thermal
protector.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Perform a check of the thermal protector of the mixed circuit. See
273].
Possible cause:
Faulty thermal protector or faulty switching temperature of
thermal protector.
2
Perform a check of the bizone kit PCB. See documentation of the bizone kit.
Possible cause:
Faulty bizone kit PCB.
draft – 31/05/2022 15:53
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