Daikin VRV IV+ Service Manual page 266

3 | Components
To check the HAP LED of the fan inverter PCB
Service manual
266
a Pin 1
b Pin 3
Is the measured voltage on the PCB
correct?
Yes
No
3 Measure the output voltage on connector X601A on the inverter PCB.
Result: The measured voltage MUST be 18 V DC.
Is the measured output voltage on the
inverter PCB correct?
Yes
No
Prerequisite: First perform a power check of the fan inverter PCB, see
4
procedures" [ 265].
1 Locate the HAP LED on the fan inverter PCB.
a HAP LED
Does the HAP LED blink in regular
intervals (approximately 1 Hz)?
Yes
b a
Action
Return to
procedures" [
PCB and continue with the next
procedure.
Continue with the next step.
Action
Correct the wiring between the fan
inverter PCB and the inverter PCB, see
"4.1.2 Repair
Perform a check of the inverter PCB,
see "3.10.1 Checking
procedures" [
a
Action
Return to
procedures" [
PCB and continue with the next
procedure.
"Checking
4
265] procedures of the
4
procedures" [ 361].
4
274].
"Checking
"Checking
4
265] of the fan inverter
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05