PLANAR
Edition 1
March 2016
Page. 21 of 29
5.6 Functions, Removal and Replacement of Air Blower.
The blower (Fig.11) consists of an electric motor with a volute.The motor shaft
carries an impeller on the volute side (for air supply into the combustion chamber),
and a fan on the other side (for heated air supply).
PLANAR-2D
PLANAR-8DM
Fig.11–Air Blower.
Rotating impeller generates air flow in the annular channel of the volute, which enters
the combustion chamber to ensure combustion, and also purges the combustion chamber
while cooling it and removing remaining fuel and moisture before and after the combustion
process.
The fan creates a flow of air that passes through the radiators of the heat exchanger,
when the heater is in operation, is heated, and the heated air enters the vehicle cabin or
other interior spaces of the vehicle.
Troubleshooting the air blower:
1) Check cleanliness of the contacts connecting AB to CU;
2) Check the performance of theAB. To accomplish this, briefly connect the terminal
of the blue wire (white block, PWM) to the terminal of the black wire (Figure 12) with a
jumper, a thin wire. The heater should be connected to the power supply, but turned off. If
the fan starts to spin - the AB is OK.
3) Check the AB for the absence of "blind spots". For this purpose, connect the
terminal of the blue wire to the terminal of the black wire (Figure 12) multiple times,
while changing the position of the fan, to verify if the AB starts in every position possible.
If there are any "blind spots" - the AB is defective.