Daikin Altherma 3 M - 06 - Water Flow During Cooling;Defrost

2 | Troubleshooting
Service manual
14
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
2.3.4 7H-06 – Water flow during cooling/defrost
Trigger Effect Reset
Water flow abnormality
determined mainly during
cooling or defrost
operation.
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.
NOTICE
Focus the troubleshooting on the space cooling circuit.
1 Check that all stop valves of the water circuit are open. See "4.3 Water
circuit"[4299].
Possible cause: Closed stop valve in the water circuit.
2 Purge the water circuit. See "4.3Water circuit"[4299].
Possible cause: Air in the water circuit.
3 Check the water flow. See "4.3Water circuit"[4299].
Possible cause: Water flow is too low.
4 Check the water pressure. See "4.3Water circuit"[4299].
Possible cause: Water pressure is too low.
5 Check if a by‑pass is installed in the water circuit. See "4.3 Water
circuit"[4299].
Possible cause: No by‑pass installed in the water circuit.
6 Perform an electrical check of the water flow sensor. See "3.22 Water flow
sensor"[4268].
Possible cause: Faulty water flow sensor.
7 Perform a check of the 3-way valve. See "3.13-way valve"[486].
Possible cause: Faulty 3‑way valve.
8 Perform a check of the water pump. See "3.24Water pump"[4276].
Possible cause: Faulty water pump.
9 Perform a check of the hydro PCB. See "3.12Hydro PCB"[4160].
Possible cause: Faulty hydro PCB.
10 Perform a check of the backup heater. See "3.3Backup heater"[4104].
Possible cause: Faulty backup heater.
11 If installed, perform a check of the booster heater. See "3.5 Booster
heater"[4129].
Possible cause: Faulty booster heater.