Zanussi ZS12V70CCHI Service Manual page 47

Heating
Condenser input temperature (°C)
Outdoor unit fan motor cycle (rpm)
BLDC Outdoor Unit Fan Motor Control
• Fan motors of DC type used in Vestel outdoor units are internally driven today.
• Separate control of motor coils is not possible in internally driven type motors. Therefore, there is no other possible control
besides some simple measurements to decide whether the motor is faulty or not.
• The malfunction code for outdoor units using BLDC outdoor unit fan motor is given as ER26.
• In the event of this error code being received, outdoor unit will stop completely. In such case, the following control and
measurements should be conducted and a decision should be made about whether the malfunction is in the motor or in the
outdoor unit main board.
Prior to the checks, the following technical information about the motor label is useful to know.
Identifying the engine label:
On the label given as an example above:
We can see the order code of the 32027077 motor at Vestel, its supply voltage with DC310V (may be >310 Vdc), the power it will
spend with 40W, its designed cycle number with 850r/min (may rotate higher) and its rotation direction with the ROT symbol.
Finally, RD (red) (Vdc), BK (Black) (GND), WH (White) (Vcc), YE (Yellow) (Vsp), BL (Blue) (FG) definitions that can be seen on the far right
indicate the colors of the ends in the motor and their functions.
Briefly, RD/BK should be known as motor supply ends, BK/WH as motor driver supply ends, BK/YE as motor cycle control ends and
BL as the motor signal feedback ends.
In the event of an ER26 error occurring, the points to control will be some of these ends.
Control steps for ER26 (BLDC engine malfunction):
1. Cut the energy supply of the unit completely, rotate the fan propeller and make sure that the motor shaft is rotating easily. If the
motor shaft is jammed, it is possible to see an ER26 error.
2. Remove the motor socket from where it is connected on the board and perform the measurements below:
Note: The control steps described below are listed according to priority.
Check the impedance of the supply ends of the motor with your measuring tool.
Supply ends of the motor are red and black.
When the measurement tool's (+) probe is connected to red and (-) probe to black, 1.38 MΩ will be read and the contrary will result in
a value of approximately 1.22 MΩ. This value may vary depending on the environment temperature. The important thing is that a value
is seen in measurements. If there is no value seen after measuring, the motor is faulty.
12K Outdoor Unit
≤ 3 > 3 ~ ≤ 5 > 5 ~ ≤ 8
1100 980 800
47
> 8 ~ ≤ 12
> 12
600 400