Water Volume/Flow Related - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting

3.16. Water volume/flow related

Possible failures
The water flow is to low (7H
error)
Water volume is too low
Page 64
Daikin Altherma Monobloc CA
Root cause
Shut off valve are closed.
Water filter is dirty.
Air in the system.
Water pressure is >1bar.
Expansion vessel is broken.
The resistance in the water cir-
cuit is too high for the pump.
Flow sensor is broken.
3. Symptom based troubleshooting
Check
Check if shut off valves are com-
pletely open.
Check the water filter.
Check the water pressure on the
manometer.
Check the expansion vessel.
Check ESP curves.
Check flow sensor and flow sen-
sor connector to PCB board.
Check if the water volume is cor-
rect, refer to installer reference
guide
Corrective action
Open shut of valves if required.
Clean water filter when required.
Perform an air purge, refer to
Installer Reference Guide.
Add water when required until
water pressure is +/- 2 bar.
Replace expansion vessel when
required.
Adjust water circuit when
required.
Replace flow sensor of flow sen-
sor harness when required.
Add water when required.
19/07/16