Daikin VRV IV+ Service Manual page 307

3.14 Outdoor unit fan motor
3.14.1 Single fan outdoor unit
Checking procedures
To perform a mechanical check of the propeller fan blade assembly
To perform a mechanical check of the DC fan motor assembly
To perform an electrical check of the DC fan motor assembly
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
INFORMATION
It is recommended to perform the checks in the listed order.
Prerequisite: First perform a power transistor check of the fan inverter PCB, see
4
"3.8 Fan inverter PCB" [
Prerequisite: Stop the unit operation via the central controller.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
1 If propeller fan blade touches the bellmounth, check if the fan motor is
correctly mounted on its base, see
2 Check the state of the propeller fan blade assembly for damage, deformations
and cracks.
Is the propeller fan blade assembly
damaged?
Yes
No
Prerequisite: First perform a mechanical check of the propeller fan blade
assembly, see "Checking
1 Manually rotate the fan motor shaft. Check that it rotates smoothly.
2 Check the friction of the DC fan motor shaft bearing.
Is the DC fan motor shaft friction
normal?
Yes
No
1 First perform a mechanical check of the DC fan motor assembly, see
4
procedures" [ 307].
2 Turn ON the power of the unit.
259]. If power transistor is OK, proceed as follows:
"Repair procedures" [
Action
Replace the propeller fan blade
assembly, see
procedures" [
Perform a mechanical check of the DC
fan motor assembly, see
procedures" [
procedures" [ 4 307].
Action
Perform an electrical check of the DC
fan motor assembly, see
procedures" [
Replace the DC fan motor assembly, see
"Repair
3 Components
|
4
"3.15 Plate work" [ 315].
4
308].
"Repair
4
308].
"Checking
4
307].
"Checking
4
307].
4
procedures" [ 308].
"Checking
Service manual
307