Outdoor Unit Fan Motor; Single Fan Outdoor Unit - Daikin VRV IV+ Service Manual

https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Is the problem solved?
No
3.12

Outdoor unit fan motor

3.12.1

Single fan outdoor unit

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: First perform a power transistor check of the fan
inverter PCB, see "3.6 Fan inverter PCB" on page
transistor is OK, proceed as follows:
Prerequisite: Stop the unit operation (via the user interface, central
controller, operation switch, ...).
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
work" on page 118.
1 If propeller fan blade touches the bellmounth, check if the fan
motor is correctly mounted on its base, see
procedures" on page 115.
2 Check the state of the propeller fan blade assembly for
damage, deformations and cracks.
Is the propeller fan blade
assembly damaged?
Yes
No
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" on
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
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" on
DANGER: RISK OF ELECTROCUTION
Confirm rectifier voltage is below 10 V DC before
proceeding.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Action
Return to "3.11.1 Checking
procedures" on page 112 of the
oil return valve and continue with
the next procedure.
92. If power
"3.13 Plate
"Repair
Action
Replace the propeller fan blade
assembly, see "Repair
procedures" on page 115.
Perform a mechanical check of
the DC fan motor assembly, see
"Checking procedures" on
page 115.
page 115.
Action
Perform an electrical check of the
DC fan motor assembly, see
"Checking procedures" on
page 115.
Replace the DC fan motor
assembly, see "Repair
procedures" on page 115.
page 115.
2 Check that the DC fan motor connector X1A is properly
connected to the PCB.
3 Measure the resistance between the pins 1–2, 1–3, and 2–3 of
the DC fan motor connector. All measurements MUST be
8.27 Ω±5% 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.
4 Measure the insulation resistance for the motor terminals.
Measurements between each phase and ground must be
>1°MΩ.
DC fan motor resistance
measurements are correct?
Yes
No
Problem solved?
After all checking procedures listed above have been performed:
Is the problem solved?
Yes
No
Repair procedures
To remove the propeller fan blade assembly
Prerequisite: Stop the unit operation (via the user interface, central
controller, operation switch, ...).
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see
page 118.
2 Loosen and remove the screw using an Allen key.
3 Remove the axle cover.
4 Pull the propeller fan blade from the fan motor axle.
b a d
c
a Screw
b Allen key
c Axle cover
d Propeller fan blade assembly
e Pulley remover
INFORMATION
Use a pulley remover if the propeller cannot be removed
manually.
3 Components
Action
Return to the troubleshooting of
the specific error and continue
with the next procedure.
Replace the DC fan motor, see
"Repair procedures" on
page 115.
Action
No further actions required.
Return to the troubleshooting of
the specific error and continue
with the next procedure.
"3.13 Plate work" on
e
Service manual
115