Daikin VRV IV+ Service Manual page 259

3.8 Fan inverter PCB
3.8.1 Single fan outdoor unit
Checking procedures
To perform a power check of the fan inverter PCB
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
4 Fix the expansion valve coil harness using new tie straps.
5 Install the insulation cap on the expansion valve motor (if applicable).
Is the problem solved?
Yes
No
INFORMATION
It is recommended to perform the checks in the listed order.
Prerequisite: Stop the unit operation via the central controller.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
Prerequisite: Access the switch box, see
1 Turn ON the power of the unit.
2 Measure the voltage between pins 1 and 3 of connector X5A The measured
voltage MUST be 18 V DC.
a Pin 1
b Pin 3
Is the measured voltage on the PCB
correct?
Yes
No
3 Measure the output voltage voltage on connector X601A on the inverter PCB.
Result: The measured voltage MUST be 18 V DC.
Action
No further actions required.
Return to
procedures" [
valve and continue with the next
procedure.
"3.15 Plate
"3.15 Plate
b a
Action
Return to
procedures" [
continue with the next procedure.
Continue with the next step.
3 Components
|
"Checking
4
252] of the expansion
4
work" [ 315].
4
work" [ 315].
"Checking
4
259] of the PCB and
Service manual
259