Daikin VRV IV+ Service Manual page 104

3 Components
21 Lift and slightly tilt the compressor inverter PCB assembly (d),
guide the compressor cable (e) into the switch box.
22 Put the compressor inverter PCB assembly (d) in horizontal
position.
23 Remove the 4 screws (f) that fix the compressor inverter PCB
(d).
a
c
b
g
b
d g e b
a Power terminal assembly
b Screw
c Heat sink
d Inverter PCB
e Compressor cable
f Screw
g Screw
24 Disconnect all wiring from the compressor inverter PCB.
The compressor inverter PCB is fixed to the heat sink element with
screws (a), through the screw holes on the PCB.
25 Remove the screws (a) to remove the PCB from the heat sink
element.
26 Unlatch the PCB supports (b) one by one using a small pair of
pliers.
27 Remove the compressor inverter PCB.
b
b
b
b
a Screw
b PCB support
For double fan units
28 Disconnect all connectors (a) from the inverter PCB.
29 Disconnect the wire terminals (b) of the inverter PCB.
Service manual
104
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
f
f
d
b f f
a b
b
b
b
a
c c b
a
c b b c b
a Connector
b Wire terminal
c PCB support
d Screw
30 Remove the 4 screws (e) that fix the heat sink (f) to the switch
box.
e e
e f e
e Screw
f Heat sink
31 Remove the screws (d) that fix the inverter PCB to the heat
sink.
WARNING
Thermal grease is applied to the heat sinks. Use gloves
when separating the heat sinks from the inverter boards.
32 Unlatch the PCB supports (c) one by one using a small pair of
pliers.
33 Remove the inverter PCB.
34 To install the new inverter
procedures" on page 103.
To install the inverter PCB
For single fan units
1 Clean the heat sink (c) surface and apply a thin layer of heat
sink compound to the heat sink surface.
2 Install the inverter PCB on its correct location.
3 Latch the PCB supports (c) using a small pair of pliers to fix the
PCB.
4 Install and tighten the 2 screws (d) to fix the inverter PCB to the
heat sink plate.
a c a c
a
c
d
d
b b b b c
e e
e f e
PCB, see "3.8.2 Repair
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07