Water Pressure Sensor; Checking Procedures - Daikin altherma 3 M Service Manual

3 | Components

3.23 Water pressure sensor

3.23.1 Checking procedures

To perform an electrical check of the water pressure sensor
Service manual
272
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 Turn ON the power of the unit.
2 Read the water pressure on the home screen of the user interface.
Result: The pressure MUST be 1~2 bar.
3 Using the graphic below, determine the expected sensor output voltage based
on the measured pressure.
a
4
3
2
1
0
0 0.5 1
a Pressure (bar)
b Output voltage (V)
V DC
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
2 3 3.5 4 5
Detected pressure (bar)
0.00
0.13
0.26
0.40
0.53
0.66
0.80
0.93
1.06
1.20
4
"3.17 Plate work" [ 230].
b
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03