Daikin Sky Air Advance RZA200D7Y1B, Service Manual

Page: 108 / 192

3 | Components
Service manual
108
250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
2 Turn ON the power of the unit.
3 Activate Cooling or Heating operation via the user interface.
4 Check the functioning of the outdoor unit fan.
Outdoor unit fan … Action
Rotates continuously (without
interruption) DC fan motor assembly is OK. Return to
the troubleshooting of the specific error
and continue with the next procedure.
Does not rotate or rotates for a short
time Continue with the next step.
5 Turn OFF the unit via the user interface.
6 Turn OFF the respective circuit breaker.
7 Check that the DC fan motor connector is properly connected to the PCB.
8 Unplug the DC fan motor connector and measure the resistance between the
pins 1-2, 1-3, and 2-3 of the DC fan motor connector.
Result: All measurements MUST be 7.6 Ω±10% at 20°C.
INFORMATION
Winding resistance values above are given for reference. You should NOT be reading
a value in kΩ or a short‑circuit. Make sure that the propeller fan blade does NOT
rotate, as this could affect resistance measurements.
9 Measure the insulation resistance for the motor terminals. Measurements
between each phase and ground must be >1°MΩ.
Are the measured resistance values
correct? Action
Yes Perform a check of the main PCB, see
"3.9.1 Checking procedures" [
4
95].
No Replace the DC fan motor, see
"3.11.2 Repair procedures" [ 4 108].
Problem solved?
After all checking procedures listed above have been performed:
Is the problem solved? Action
Yes No further actions required.
No Return to the troubleshooting of the
specific error and continue with the
next procedure.
3.11.2 Repair procedures
To remove the propeller fan blade assembly
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see "3.12 Plate work" [
4
111].
2 Remove the nut that fixes the propeller fan blade assembly.