Thermo King SLXi Spectrum, Руководство по обслуживанию

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Structural Maintenance 12-14
At this point the outer cam is not in contact with the outer micro switch and the outer micro switch is in the normal position. The
29A (or 29B) circuit is connected to the damper motor through the outer micro switch.
The outer cam leads the inner cam by 20 degrees, therefore the inner cam is in contact with the inner micro switch and the inner
micro switch is in the active position. The 29A (or 29B) circuit is also connected to the damper motor through the inner micro
switch. Two circuits are available to provide power to the damper motor when defrost is first terminated (see “Two Initial Micro
Switch Circuits Open Damper” illustration).
As the damper motor rotates, the inner cam leaves the inner micro switch and the inner micro switch returns to the normal
position. The 29A (or 29B) circuit is no longer connected to the damper motor through the inner micro switch. A single circuit
through the outer micro switch continues to provide power to the damper motor (see “Outer Micro Switch Circuit Still Opening
Damper” illustration).
The damper motor continues to rate until the outer cam makes contact with the outer micro switch and places the outer micro
switch in the active position. The 29A (or 29B) circuit is no longer connected to the damper motor through the outer micro switch.
No power is reaching the damper motor and the damper motor stops. The damper is now in the open position. Open circuits stop
the damper motor in the open position (see “Micro Switch Circuits When Damper Is Open” illustration).
Damper Motor Installation and Damper Adjustment
Damper Motor Test
Check the operation of the damper motor assembly before installing it.
1. Position the damper motor assembly so the electric motor is on the bottom side of the gear case. Look at the gear case end of
the damper motor assembly and watch the output shaft to see if the damper motor assembly operates correctly. The gear case
end of the output shaft has a flat machined on one side.
2. Ground the CH circuit of the damper motor assembly by connecting it to the negative terminal of a 12 volt dc power source.
3. Connect the 29 circuit in the wire connector on the damper motor assembly to the positive terminal of the power source. This
should energise the damper motor assembly and the output shaft should rotate counter clockwise until it stops. When it stops
the flat should be on the right side of the output shaft and approximately parallel with the vertical sides of the gear case. In
this position the damper would be closed. If the output shaft was in this position to begin with, it may not move.
4. Connect the 29A (or 29B) circuit in the wire connector on the damper motor assembly to the positive terminal of the power
source. This should energise the damper motor assembly and the output shaft of the damper motor assembly should rotate
counter clockwise until it stops.
Damper Motor Output Shaft Position with Damper
Open – SL
1. Flat to Left
2. Output Shaft