Repair Procedures; Oil Return Valve; Checking Procedures - Daikin VRV IV+ Service Manual

3 Components
3.10.2

Repair procedures

To correct the wiring from the main power supply
terminal to the noise filter PCB
1 Make sure that all wires are firmly and correctly connected, see
"6.2 Wiring diagram" on page 146.
2 Check the continuity of all wires.
3 Replace any damaged or broken wires.
Is the problem solved?
Yes
No
To remove the noise filter PCB
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.
Prerequisite: Access the switch box, see
page 118.
1 Disconnect all the wires of the noise filter PCB.
INFORMATION
The connectors on the PCB can be screw- or Faston-type,
depending on the model.
b b
a
a
a
a
b b
a Connector
b PCB supports
2 Carefully pull the PCB at the side and unlatch the PCB supports
one by one using a small pair of pliers.
3 To install the new noise filter PCB, see
procedures" on page 112.
To install the noise filter PCB
1 Install the noise filter PCB on its correct location.
2 Latch the PCB supports using a small pair of pliers to fix the
PCB.
Service manual
112
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Action
No further actions required.
Return to "3.10.1 Checking
procedures" on page 110 of the
noise filter PCB and continue
with the next procedure.
"3.13 Plate
"3.13 Plate work" on
b
a
a
a
a
b
"3.10.2 Repair
b b
a
a
a
a
b b
a Connector
b PCB supports
3 Connect all the wires to the connectors of the noise filter PCB.
INFORMATION
The connectors on the PCB can be screw- or Faston-type,
depending on the model.
Is the problem solved?
Yes
No
To adjust the wiring of the noise filter PCB
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 Adjust the wiring according to the wiring diagram and
connection diagram, see "6.2 Wiring diagram" on
2 Check that all wires are properly connected and that all
connectors are fully plugged‑in.
3 Check that no connectors or wires are damaged.
Is the problem solved?
Yes
No
3.11

Oil return valve

3.11.1

Checking procedures

INFORMATION
It is recommended to perform the checks in the listed
order.
To perform a mechanical check of the oil return
valve
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 Verify that the screw is firmly fixing the coil to the valve body.
2 Check if any damage or burst is present.
b
a
a
a
a
b
Action
No further actions required.
Return to "3.10.1 Checking
procedures" on page 110 of the
noise filter PCB and continue
with the next procedure.
"3.13 Plate
page 146.
Action
No further actions required.
Return to "3.10.1 Checking
procedures" on page 110 of the
noise filter PCB and continue
with the next procedure.
"3.13 Plate
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07