Daikin Sky Air Advance RZA200D7Y1B, Service Manual

Page: 74 / 192

3 | Components
Service manual
74
250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
WARNING
When reconnecting a connector to the PCB, do NOT apply force, as this may damage
the connector or connector pins of the PCB.
4 Fix the expansion valve motor harness using new tie straps.
5 Install the insulation cap on the expansion valve motor (if applicable).
Is the problem solved? Action
Yes No further actions required.
No Return to "3.4.1 Checking
procedures" [
4
68] of the expansion
valve and continue with the next
procedure.
3.5 Fan inverter PCB
3.5.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a power check of the fan inverter PCB
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "3.12 Plate work" [ 4 111].
Prerequisite: Access the back side of the switch box, see "3.12 Plate work" [
4
111].
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 b
a Pin 1
b Pin 3
Is the measured voltage on the PCB
correct? Action
Yes Return to "3.5.1 Checking
procedures" [
4
74] of the PCB and
continue with the next procedure.
No Continue with the next step.
3 Measure the output voltage voltage on connector X601A on the inverter PCB.
Result: The measured voltage MUST be 18 V DC.