Expansion Valve; Checking Procedures - Daikin VRV IV+ Service Manual

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a Current sensor
b Tie wrap
c Ferrite core
d Screw connections
e Power wiring
2 Remove the necessary tie wraps from the wiring of the current
sensor and the power wiring.
3 Remove the ferrite core.
4 Loosen the screws on the connections.
5 Slide the current sensor on the power wiring and remove the
current sensor.
To install a current sensor
1 Slide the current sensor on the power wiring and install the
current sensor in place.
2 Install the power wiring in the connections and fasten the
screws.
3 Install the ferrite core.
4 Connect the current sensor connector.
5 Install new tie wraps on the wiring of the current sensor and on
the power wiring.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
a
b
e
b
c
b
e
d
a Current sensor
b Tie wrap
c Ferrite core
d Screw connections
e Power wiring
3.5

Expansion valve

3.5.1

Checking procedures

INFORMATION
It is recommended to perform the checks in the listed
order.
To perform a mechanical check of the expansion
valve
Prerequisite: Power OFF the unit for 3 minutes. Then turn ON the
unit and listen to the expansion valve assembly. If the expansion
valve does NOT make a latching sound, continue with the electrical
check of the expansion valve, see
page 89.
Prerequisite: Stop the unit operation (via the user interface, central
controller, operation switch, ...).
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
work" on page 118.
1 Remove the expansion valve motor from the expansion valve
body, see "3.5.2 Repair procedures" on
2 Slide the expansion valve magnet over the expansion valve
body and gently rotate the magnet clockwise/counterclockwise
to manually close/open the expansion valve.
Does the expansion valve
open?
Yes
No
3 Components
a
b
e
b
c
b
e
d
"3.5.1 Checking procedures" on
"3.13 Plate
page 90.
Action
Perform an electrical check of the
expansion valve, see
"3.5.1 Checking procedures" on
page 89.
Replace the expansion valve
body, see "3.5.2 Repair
procedures" on page 90.
Service manual
89