06 - Water Flow During Cooling/Defrost - Daikin Altherma 3 H HT ECH2O Service Manual

3.5.4 7H-06 – Water flow during cooling/defrost
EPRA14~18D + ETSH/X(B)16P30+50E
Daikin Altherma 3 H HT ECH₂O
ESIE22-11A – 2023.06
10 Perform a check of the hydro PCB. See
Possible cause: Faulty hydro PCB.
11 Perform a check of the hydro extension PCB. See
4
PCB" [ 201].
Possible cause: Faulty hydro extension PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Water flow abnormality
determined mainly during
cooling or defrost
operation.
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
circuit" [ 4 377].
Possible cause: Closed stop valve in the water circuit.
2 Purge the water circuit. See
Possible cause: Air in the water circuit.
3 Check the water flow. See
Possible cause: Water flow is too low.
4 Check the water pressure. See
Possible cause: Water pressure is too low.
5 Check if a by‑pass is installed in the water circuit. See
4
circuit" [ 377].
Possible cause: No by‑pass installed in the water circuit.
6 Clean the water filter. See
Possible cause: Clogged water filter.
7 Perform an electrical check of the water flow sensor. See
sensor" [ 4 344].
Possible cause: Faulty water flow sensor.
8 Perform a check of both 3-way valves. See
Possible cause: Faulty 3‑way valve(s).
9 Perform a check of the water pump. See
"4.11 Hydro
Effect
Unit will stop operating.
"5.3 Water circuit" [
4
"5.3 Water circuit" [
"5.3 Water circuit" [
"5.4 Manufacturer components" [
"4.1 3-way
"4.27 Water
3 Troubleshooting
|
4
PCB" [ 193].
"4.12 Hydro extension
Reset
Manual reset via user
interface.
"5.3 Water
4
377].
377].
4
377].
"5.3 Water
4
386].
"4.25 Water flow
4
valve" [ 108].
4
pump" [ 352].
Service manual
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