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Components
Service manual
267
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Does the HAP LED blink in regular
intervals (approximately 1 Hz)?
Action
No
Replace the fan inverter PCB, see
To check if the correct spare part is installed
Prerequisite:
First perform all earlier checks of the fan inverter PCB, see
265].
1
Visit your local spare parts webbank.
2
Enter the model name of your unit and check if the installed spare part
number corresponds with the spare part number indicated in the webbank.
Is the correct spare part for the fan
inverter PCB installed?
Action
Yes
Return to
265] of the fan inverter
PCB and continue with the next
procedure.
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
265].
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
265] 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
265].
1
Measure the continuity of the fuse. If no continuity is measured, the fuse has
blown.
Summary of Contents for VRV IV+
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