Daikin Sensira Series, Service Manual

Page: 92 / 172

2 | Components
Service manual
92
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Split Sensira R32
ESIE18-12E – 2021.02
2.9 Outdoor unit fan motor
2.9.1 Class 20~42 units
Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a mechanical check of the propeller fan blade assembly
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "2.10 Plate work" [ 4 101].
1 If propeller fan blade touches the bellmounth, check if the fan motor is
correctly mounted on its base, see
"Repair procedures" [
4
94].
2 Check the state of the propeller fan blade assembly for damage, deformations
and cracks.
Is the propeller fan blade assembly
damaged? Action
Yes Replace the propeller fan blade
assembly, see
"Repair
procedures" [
4
94].
No Perform a mechanical check of the DC
fan motor assembly, see
"Checking
procedures" [
4
92].
To perform a mechanical check of the DC fan motor assembly
Prerequisite: First perform a mechanical check of the propeller fan blade
assembly, see "Checking procedures" [
4
92].
1 Visually check:
▪ For any burnt‑out part or wire. If found, replace the fan motor, see "Repair
procedures" [ 4 94].
▪ That fan motor fixation bolts are correctly installed and fixed. Correct as
needed.
2 Manually rotate the fan motor shaft. Check that it rotates smoothly.
3 Check the friction of the DC fan motor shaft bearing.
Is the DC fan motor shaft friction
normal? Action
Yes Perform an electrical check of the DC
fan motor assembly, see
"Checking
procedures" [
4
92].
No Replace the DC fan motor assembly, see
"Repair procedures" [
4
94].
To perform an electrical check of the DC fan motor assembly
1 First perform a mechanical check of the DC fan motor assembly, see "Checking
procedures" [
4
92].