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

3 | Components

3.18.2 Repair procedures

3.19 Refrigerant pressure sensor

3.19.1 Checking procedures

To perform an electrical check of the refrigerant pressure sensor
Service manual
244
5 Measure the inductance of the reactor using an LCR meter.
Result: The inductance MUST be as follows:
Measuring points
d‑e
Is the inductance measurement
correct?
Yes
No
As the reactors are part of the main PCB, replace the complete main PCB. See
4
"3.14 Main PCB" [ 171].
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 Connect a pressure gauge to the gas service port. Read the pressure.
3 Using the graphic below, determine the expected sensor output voltage based
on the pressure obtained in the previous step.
5
4.5
4
3.5
3
2.5
a
2
1.5
1
0.5
0
-0.5
-0.5 0 0.5 1
Inductance
104~116 µH
Action
Return to the troubleshooting of the
specific error and continue with the
next step.
Replace the reactor, see
procedures" [
1.5 2 2.5 3 3.5 4
b
"3.18.2 Repair
4
244].
"3.17 Plate work" [ 4 230].
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03