Daikin VRV IV+ Service Manual page 345

To check the varistor of the Sub PCB
Problem solved?
3.20.2 Repair procedures
To correct the wiring from the main power supply terminal to the Sub PCB
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Blown fuse on the Sub PCB?
No
Prerequisite: First perform all earlier checks of the Sub PCB, see
4
procedures" [ 342].
1 Measure the resistance of the varistor. If the reading is nearly infinite, the
varistor is still good.
a
a Varistor F1S
Varistor on Sub PCB broken?
Yes
No
After all checking procedures listed above have been performed:
Is the problem solved?
Yes
No
Prerequisite: Stop the unit operation via the central controller.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see
2 Make sure that all wires are firmly and correctly connected, see
4
diagram" [ 385].
3 Check the continuity of all wires.
4 Replace any damaged or broken wires.
Is the problem solved?
Yes
3
|
Action
Return to "3.20.1 Checking
4
procedures" [ 342] of the Sub PCB and
continue with the next procedure.
Action
Replace the Sub PCB, see
4
procedures" [ 345].
Return to "3.20.1 Checking
4
procedures" [ 342] of the sub PCB and
continue with the next procedure.
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
4
"3.15 Plate work" [ 315].
Action
No further actions required.
Components
"3.20.1 Checking
"3.20.2 Repair
"6.2 Wiring
Service manual
345