Daikin VRV IV+ Service Manual page 268

3 | Components
To perform a power transistor check of the fan inverter PCB
Service manual
268
a Fuse
Blown fuse on the fan inverter PCB?
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
1 Set the multimeter to diode measurement.
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see
rectifier voltage" [
2 Check the fan inverter PCB in reference with the tables below.
a
b
Action
Replace the fan inverter PCB, see
"Repair
Return to
procedures" [
PCB and continue with the next
procedure.
4
356].
d e f g
d' e' f' g'
a
4
procedures" [ 269].
"Checking
4
265] of the fan inverter
4
"3.15 Plate work" [ 315].
"To check the
c
c'
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05