Repair Procedures - Daikin Sensira Series Service Manual

2 | Components
Problem solved?

2.3.2 Repair procedures

To remove the expansion valve motor
Service manual
56
sequence you may be able to measure the supply voltage for a short time. If
you set the multimeter range to Auto, then most likely you may NOT read a
value between switching ranges. The best way to check is to feel the
movement of the valve by touching, rather than trying to measure the driving
voltage.
8 When the expansion valve was commanded to close, check the inlet and
outlet of the valve with a contact thermometer or use an expansion valve
stethoscope to see if refrigerant flows through the expansion valve. Check
that the valve is NOT bleeding.
Result: There MUST be NO flow through the expansion valve.
9 When the expansion valve was commanded to open, check the inlet and
outlet of the valve with a contact thermometer or use an expansion valve
stethoscope to see if refrigerant flows through the expansion valve.
Result: Refrigerant MUST flow through the expansion valve.
Is the flow through the expansion valve
correct?
Yes
No
After all checking procedures listed above have been performed:
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 If needed, remove any parts or insulation to create more space for the
removal.
2 Remove the cap (if appliccable) from the expansion valve motor.
Action
Component is OK. Return to the
troubleshooting of the specific error
and continue with the next step.
Replace the expansion valve, see
"2.3.2 Repair procedures" [
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"2.10 Plate
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
4
56].
4
work" [ 101].
Split Sensira R32
ESIE18-12E – 2021.02