Daikin VRV IV+ Service Manual page 339

To perform an operation check of the solenoid valve
Problem solved?
3.19.2 Repair procedures
To remove the solenoid valve coil
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Prerequisite: First perform an electrical check of the solenoid valve, see
"3.19.1 Checking procedures" [
1 With the unit operating, check if the solenoid valve is open or closed.
INFORMATION
Check the solenoid valve status using the service monitoring tool.
On a single unit the solenoid valve is open when the unit is operating.
On a multi combination:
▪
If there is enough liquid compared to the load, the solenoid valve may be
switched OFF in one of the units.
▪
When in high load operation, the solenoid valve will most likely be open on all
units.
2 When the solenoid valve is closed, check the valve inlet and outlet for leaks.
Replace the valve body if any leak is found, see
4
procedures" [ 339].
3 If the solenoid valve is open, check with a contact thermometer (or by
touching) if refrigerant flows through the solenoid valve.
4 Wait for the solenoid valve to open or close and again perform the above
checks.
Is the solenoid valve operating
correctly?
Yes
No
After all checking procedures listed above have been performed:
Is the problem solved?
Yes
No
Prerequisite: Stop the unit operation via the central controller.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
Prerequisite: If needed, remove any parts or insulation to create more space for
the removal.
1 Remove the screw that fixes the solenoid valve coil to the solenoid valve body.
4
337].
Action
Component is OK. Return to the
troubleshooting of the specific error
and continue with the next step.
Replace the solenoid valve body, see
"3.19.2 Repair
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"3.15 Plate
3 Components
|
"3.19.2 Repair
4
procedures" [ 339].
4
work" [ 315].
Service manual
339