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Components
Service manual
261
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Is the correct spare part for the fan
inverter PCB installed?
Action
No
Replace the fan inverter PCB, see
To check the wiring of the fan inverter PCB
Prerequisite:
First perform all earlier checks of the fan inverter PCB, see
259].
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
INFORMATION
Correct the wiring as needed.
Is the problem solved?
Action
Yes
No further actions required.
No
Return to
259] of the fan inverter
PCB and continue with the next
procedure.
To check the fuse of the fan inverter PCB
Prerequisite:
First perform all earlier checks of the fan inverter PCB, see
259].
1
Measure the continuity of the fuse. If no continuity is measured, the fuse has
blown.
a
a
Fuse
Blown fuse on the fan inverter PCB?
Action
Yes
Replace the fan inverter PCB, see
Summary of Contents for VRV IV+
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