Daikin VRV IV+ Service Manual page 293

To check the varistors of the main PCB
Problem solved?
3.11.2 Repair procedures
To correct the wiring from the main power supply terminal to the main PCB
To remove the main PCB
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Any blown fuses on the main PCB?
No
Prerequisite: First perform all earlier checks of the main PCB, see
4
procedures" [ 290].
1 Measure the resistance of the varistor. If the reading is nearly infinite, the
varistor is still good.
a
a Varistors
Any broken varistors on the main PCB? Action
Yes
No
After all checking procedures listed above have been performed:
Is the problem solved?
Yes
No
1 Correct the wiring from the main power supply terminal to the PCB, see
"6.2 Wiring diagram" [
Is the problem solved?
Yes
No
Prerequisite: Stop the unit operation via the central controller.
Action
Return to
procedures" [
and continue with the next procedure.
a
Replace the main PCB, see
"3.11.2 Repair
Return to
procedures" [
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.
4 385].
Action
No further actions required.
Return to
procedures" [
and continue with the next procedure.
3 Components
|
"3.11.1 Checking
4
290] of the main PCB
"3.11.1 Checking
4
procedures." [ 293]
"3.11.1 Checking
4
290] of the main PCB
"3.11.1 Checking
4
290] of the main PCB
Service manual
293