High Pressure Switch; Checking Procedures - Daikin altherma 3 M Service Manual

3.11 High pressure switch

3.11.1 Checking procedures

To perform an electrical check of the high pressure switch
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
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 Install new tie straps to fix the flow switch wiring harness.
INFORMATION
Replace all cable ties that were cut during removal.
5 Open the valve (if equipped) of the water circuit towards the expansion vessel.
CAUTION
Make sure to open the valve (if equipped) towards the expansion vessel, otherwise
the overpressure will be generated.
6 Open the stop valves and add water to the water circuit if needed, see
"4.3.2 Repair procedures" [
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 Recuperate the refrigerant from the refrigerant circuit, see
4
procedures" [ 291].
2 Fill the refrigerant circuit with nitrogen until pressurized just below operating
pressure of the high pressure switch.
a
d
c
f
a High pressure switch protection control
b Pressure
c High pressure switch closed
d High pressure switch open
e High pressure switch operating pressure
f High pressure switch reset pressure
4
302].
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"3.17 Plate
e b
3 Components
|
4
work" [ 230].
"4.2.2 Repair
Service manual
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