Flow Switch; Checking Procedures - Daikin EBLA04E V Series Service Manual

4.10 Flow switch

4.10.1 Checking procedures

To perform an electrical check of the flow switch
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
2 Route the expansion valve coil harness towards the appropriate PCB.
3 Connect the expansion valve coil connector to the appropriate PCB.
WARNING
When reconnecting a connector to the PCB, make sure to connect it on the correct
location and do NOT apply force, as this may damage the connector or connector
pins of the PCB.
4 Fix the expansion valve coil harness using new tie straps.
5 Install the insulation cap on the expansion valve coil (if applicable).
Is the problem solved?
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 Check that the flow switch is correctly installed. The arrow MUST point in the
direction of the water flow. Correct as needed.
2 Turn ON the power of the unit.
3 With the unit powered ON but NOT operating, disconnect the flow switch
connector X45A from the hydro PCB.
4 Measure the voltage on the connector on the hydro PCB.
Result: The measured voltage MUST be approximately 16 V DC.
Is measured voltage correct?
Yes
No
5 Make sure that the unit is NOT operating, and there is NO water flow.
6 Measure the resistance on the (disconnected) flow switch connector.
Result: The flow switch MUST be open (OL).
7 Activate Installer on the user interface. See the installer reference guide
for the correct procedure.
8 Go to Actuator test run via the user interface.
9 Activate the Pump.
10 Make sure to select high speed and check that the water flow is >15 L/min.
4 |
Action
No further actions required.
Return to "4.9.1 Checking
4
procedures" [ 162] of the expansion
valve and continue with the next
procedure.
"4.16 Plate work" [
Then
Continue with the next step.
Perform a check of the hydro PCB, see
"4.12.1 Checking procedures" [
draft – 31/05/2022 15:53
Components
4
202].
4
175].
Service manual
169