Daikin VRV IV+ Service Manual page 298

3 | Components
3.12 Noise filter PCB
3.12.1 Checking procedures
To perform a power check of the noise filter PCB
To check if the correct spare part is installed
Service manual
298
INFORMATION
It is recommended to perform the checks in the listed order.
Prerequisite: Stop the unit operation via the central controller.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
Prerequisite: Access the switch box, see
1 Turn ON the power of the unit.
2 Measure the voltage between the following wires of the noise filter PCB on
the location shown below. All measurements MUST be 400 V AC.
▪ L1A–L2A
▪ L1A–L3A
▪ L2A–L3A
c
b
a
a L1A
b L1A
c L3A
Is the measured voltage on the PCB
correct?
Yes
No
3 Check the power supply to the unit, see
Does the unit receive power?
Yes
No
Prerequisite: First perform all earlier checks of the noise filter PCB, see
"3.12.1 Checking procedures" [
"3.15 Plate
"3.15 Plate work" [
Action
Return to "3.12.1 Checking
procedures" [
PCB and continue with the next
procedure.
Continue with the next step.
"4.1.1 Checking
Action
Correct the wiring from the main power
supply terminal to the noise filter PCB,
see "3.12.2 Repair
Adjust the power supply to the unit, see
"4.1.2 Repair
4
298].
4
work" [ 315].
4
315].
4
298] procedures of the
4
procedures" [ 356].
4
procedures" [ 301].
4
procedures" [ 361].
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05