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Components
Service manual
298
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
3.12 Noise filter PCB
3.12.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a power check of the noise filter PCB
Prerequisite:
Stop the unit operation via the central controller.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
315].
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
a
b
c
a
L1A
b
L1A
c
L3A
Is the measured voltage on the PCB
correct?
Action
Yes
PCB and continue with the next
procedure.
No
Continue with the next step.
3
Check the power supply to the unit, see
Does the unit receive power?
Action
Yes
Correct the wiring from the main power
supply terminal to the noise filter PCB,
see
No
Adjust the power supply to the unit, see
361].
To check if the correct spare part is installed
Prerequisite:
First perform all earlier checks of the noise filter PCB, see
Summary of Contents for VRV IV+
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