3
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Components
Service manual
291
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
a
a
Connector X37A
Is the measurement correct?
Action
Yes
Return to
290] of the main PCB
and continue with the next procedure.
No
Replace the main PCB, see
293].
To check the HAP LED of the main PCB
Prerequisite:
First perform a power check of the main PCB, see
290].
1
Locate the HAP LED on the main PCB.
a
a
HAP LED
Does the HAP LED blink in regular
intervals (approximately 1 Hz)?
Action
Yes
Return to
290] of the main PCB
and continue with the next procedure.
No
293].
To check if the correct spare part is installed
1
First perform all earlier checks of the main PCB, see
290].
2
Visit your local spare parts webbank.
3
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.
Summary of Contents for VRV IV+
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