Daikin Altherma EBLQ011CA3V3 - Water Heat Exchange Freezing Abnormality; 00 - Backup Heater Outlet Water Temperature Increase (During Domestic Hot Water Without Booster Heater)

1 Troubleshooting
Service manual
7
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
2 Perform a check of the hydro PCB. See "2.14 Hydro PCB"on
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.
1.4.8 89-01 – Water heat exchange freezing
abnormality
Trigger Effect Reset
Warning 89‑02 or
89‑03 occurred 3
times, with less than
30minutes between
each warning.
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 Perform a check of the heat exchanger thermistor. See
"2.23Thermistors"on page82.
Possible cause: Faulty heat exchanger thermistor.
2 Perform a check of the hydro PCB. See "2.14 Hydro PCB"on
page58.
Possible cause: Faulty hydro PCB.
3 Perform a check of the refrigerant circuit. See "3.2Refrigerant
circuit"on page92.
Possible cause:
▪ Stop valve is closed,
▪ Clogged refrigerant circuit,
▪ Refrigerant circuit NOT charged correctly,
▪ Humidity in the refrigerant circuit,
▪ Non-condensables in the refrigerant circuit,
▪ Leaking refrigerant circuit.
4 Check the water flow. See "3.3Water circuit"on page95.
Possible cause: Water flow is too low.
5 Check the water pressure. See "3.3Water circuit"on page95.
Possible cause: Water pressure is too low.
6 Check the water volume. See "3.3Water circuit"on page95.
Possible cause: Water volume is too low.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.9 89-02 – Water heat exchange freezing
abnormality
Trigger Effect Reset
Condensing
temperature <0°C
during space heating.
Unit will stop
operating.
Automatic reset.
Liquid refrigerant
thermistor ≤0°C
during space heating
or domestic hot
water.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the 4‑way valve. See "2.24-way valve" on
page38.
Possible cause: Faulty 4‑way valve.
2 Perform a check of the main PCB. See "2.17 Main PCB" on
page66.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.10 89-03 – Water heat exchange freezing
abnormality
Trigger Effect Reset
Evaporation
temperature is too
low during defrost.
Unit will NOT stop
operating.
Automatic reset.
Outlet water after
plate type heat
exchanger thermistor
<6°C during defrost.
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 after plate type heat
exchanger thermistor. See "2.23Thermistors"on page82.
Possible cause: Faulty outlet water after plate type heat
exchanger thermistor.
2 Perform a check of the hydro PCB. See "2.14 Hydro PCB"on
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.
1.4.11 8F-00 – Backup heater outlet water
temperature increase (during domestic
hot water without booster heater)
Trigger Effect Reset
Outlet water after
backup heater
thermistor detects
temperature >75°C
during domestic hot
water 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
"3.3Water circuit"on page95.