Daikin VRV IV+ Service Manual page 344

3 | Components
To check the wiring of the Sub PCB
To check the fuse of the Sub PCB
Service manual
344
2 Enter the model name of your unit and check if the installed spare part
number corresponds with the spare part number indicated in the webbank.
Is the correct spare part for the Sub
PCB installed?
Yes
No
Prerequisite: First perform all earlier checks of the Sub PCB, see
4
procedures" [ 342].
Prerequisite: Stop the unit operation via the central controller.
Prerequisite: Turn OFF the respective circuit breaker.
1 Check that all wires are properly connected and that all connectors are fully
plugged‑in.
2 Check that no connectors or wires are damaged.
3 Check that the wiring corresponds with the wiring diagram, see
4
diagram" [ 385].
INFORMATION
Correct the wiring as needed.
Is the problem solved?
Yes
No
Prerequisite: First perform all earlier checks of the Sub PCB, see
4
procedures" [ 342].
1 Measure the continuity of the fuse. If no continuity is measured, the fuse has
blown.
a
a Fuse
Blown fuse on the Sub PCB?
Yes
Action
Return to "3.20.1 Checking
4
procedures" [ 342] of the Sub PCB and
continue with the next procedure.
Replace the Sub PCB, see
4
procedures" [ 345].
Action
No further actions required.
Return to "3.20.1 Checking
4
procedures" [ 342] of the Sub PCB and
continue with the next procedure.
Action
Replace the blown fuse, see
"3.20.2 Repair procedures" [
"3.20.2 Repair
"3.20.1 Checking
"6.2 Wiring
"3.20.1 Checking
4
345].
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05