Repair Procedures - Daikin altherma 3 M Service Manual

3 | Components

3.10.2 Repair procedures

To remove the flow switch
To install the flow switch
Service manual
156
Is measured voltage correct?
No
4 Make sure that the unit is NOT operating, and there is NO water flow.
5 Measure the resistance on the (disconnected) flow switch connector.
Result: The flow switch MUST be open (OL).
6 Activate Installer on the user interface. See the installer reference guide
for the correct procedure.
7 Go to Actuator test run via the user interface.
8 Activate the Pump.
9 Make sure to select high speed and check that the water flow is >15 L/min.
10 Again measure the resistance on the (disconnected) flow switch connector.
Result: The flow switch MUST be closed (0 Ω).
Are flow switch measurements
correct?
Yes
No
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
1 Drain the water circuit, see
2 Unscrew the flow switch and remove it from the piping.
3 Disconnect the flow switch wires from terminal D2 of terminal block T5 on the
main PCB and from terminal 703 of terminal block XD.
4 Disconnect the flow switch harness connector from the hydro PCB.
5 Cut all tie straps that fix the wiring harness.
6 Guide the flow switch harness out of the switch box and remove the flow
switch.
7 To install the flow switch, see
1 Install (screw) the flow switch on correct location on the piping. Ensure that
the O-ring is correctly installed and NOT damaged.
2 Route the flow switch harness into the switch box.
3 Connect the flow switch harness connector to the hydro PCB.
Then
Perform a check of the hydro PCB, see
"3.12.1 Checking
Action
Flow switch is OK. Return to
troubleshooting of the specific error
and continue with the next procedure.
Replace the flow switch, see
"3.10.2 Repair
"3.17 Plate
"4.3.2 Repair procedures" [
"3.10.2 Repair procedures" [
4
procedures" [ 160].
4
procedures" [ 156].
4
work" [ 230].
4
302].
4
156].
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03