Daikin VRV IV+ Service Manual page 269

Problem solved?
Repair procedures
To remove the fan inverter PCB
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
a Fan inverter PCB A4P
b Fan inverter PCB A7P
c / c' Connector P11
d / d' Connector N11
e / e' Connector X1A, pin U
f / f' Connector X1A, pin V
g / g' Connector X1A, pin W
VDC Com
P11 X1A, pin U
P11 X1A, pin V
P11 X1A, pin W
X1A, pin U P11
X1A, pin V P11
X1A, pin W P11
N11 X1A, pin U
Are the test results OK?
Yes
No
After all checking procedures listed above have been performed:
Is the problem solved?
Yes
No
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
1 Access the switch box, see
a d
a
a Connector
b Screw
c Connector X1A
d Connector X4A
Ref VDC
O.L N11
O.L N11
O.L X1A, pin U
0,45 X1A, pin V
0,45 X1A, pin W
0,45 P11
0,45 N11
Action
Power transistors are OK. Return to
"Checking procedures" [
Replace the fan inverter PCB, see
"Repair procedures" [
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"3.15 Plate
4
"3.15 Plate work" [ 315].
b c b a
a
3 Components
|
Com Ref
X1A, pin V 0,45
X1A, pin W 0,45
N11 O.L
N11 O.L
N11 O.L
N11 O.L
P11 0,75
4
265].
4
269].
4
work" [ 315].
Service manual
269