00 - Backup Heater Outlet Water Temperature Increase; 02 - Overheating Mixed Water Circuit (Thermostat); 03 - Overheating Water Circuit (Thermostat); A1-00 - Zero Cross Detection Abnormality - Daikin Altherma EBLQ011CAV3 Service Manual

1 Troubleshooting
Possible cause: Increased water temperature due to an
external heat source.
2 Perform a check of the outlet water after backup heater
thermistor. See "2.23 Thermistors" on
Possible cause: Faulty outlet water after backup heater
thermistor.
3 Perform a check of the backup heater. See
heater" on page 41.
Possible cause: Faulty backup heater.
4 Perform a check of the hydro PCB. See
page 58.
Possible cause: Faulty hydro PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.12 8H-00 – Backup heater outlet water
temperature increase
Trigger Effect
Outlet water after Unit will stop
backup heater operating.
thermistor detects
temperature >65°C
during space heating
without electrical
heater.
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
"3.3 Water circuit" on page 95.
Possible cause: Increased water temperature due to an
external heat source.
2 Perform a check of the outlet water after backup heater
thermistor. See "2.23 Thermistors" on
Possible cause: Faulty outlet water after backup heater
thermistor.
3 Perform a check of the backup heater. See
heater" on page 41.
Possible cause: Faulty backup heater.
4 Perform a check of the hydro PCB. See
page 58.
Possible cause: Faulty hydro PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.13 8H-02 – Overheating mixed water circuit
(thermostat)
Trigger Effect
Thermal protector Unit will stop
Q3L in mixed circuit operating.
is activated.
Service manual
8
page 82.
"2.4 Backup
"2.14 Hydro PCB" on
Reset
Manual reset via user
interface.
page 82.
"2.4 Backup
"2.14 Hydro PCB" on
Reset
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 Q3L. See
"3.4.1 Checking procedures" on
Possible cause: Faulty thermal protector or faulty switching
temperature of thermal protector Q3L.
2 Perform an electrical check of the extension PCB. See
"2.12 Extension PCB" on page 56.
Possible cause: Faulty extension PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.14 8H-03 – Overheating water circuit
(thermostat)
Trigger Effect
Unit detects activated Pump will stop
aquastat. running.
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
"3.4 Manuafacturer components" on
Possible cause: Faulty trigger temperature setting of the
safety thermostat.
2 Check the set water temperature. See
page 87.
Possible cause: Faulty water temperature setting.
3 Perform a check of the 3-way valve. See
page 35.
Possible cause: Faulty 3‑way valve.
4 Perform a check of the operation of the Aquastat. See
"3.4 Manuafacturer components" on
Possible cause: Faulty Aquastat.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.15 A1-00 – Zero cross detection abnormality
Trigger Effect
Power supply Unit will stop
abnormality. The operating.
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.
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
page 98.
Reset
Automatic reset when
the circuit is closed.
page 98.
"2.24 User interface" on
"2.1 3-way valve" on
page 98.
Reset
Manual reset via user
interface.
Power reset via
outdoor unit.
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02