Thermo King SLXi Spectrum, Руководство по обслуживанию

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Structural Maintenance 12-18
Damper System Adjustment
WARNING: This damper system can cause serious injuries. Make sure to keep your hands away from the damper door and
the moving parts of the damper system while the damper motor is energised. It is necessary to change the position of the
damper by energizing the damper motor during the adjustment procedure. It may also be desirable to energise the damper
motor while installing some of the components.
The damper system must be adjusted properly. The damper motor assembly has enough power to damage some of the damper
system components if the damper is not adjusted correctly. Two different adjustments are needed to adjust the damper properly.
First, the damper motor and bracket assembly must be positioned vertically so the rubber strip on the damper door barely makes
contact with the non-freeze strip on the bottom of the damper door opening when the damper is open. Second, the damper door
bracket must be positioned on the damper door so the damper door closes completely when the damper is closed.
1. Make sure that the damper motor and bracket assembly is positioned as high as possible in the evaporator blower housing and
that the damper is in the open position.
2. Move the damper motor and bracket assembly down until the rubber strip on the damper door barely makes contact with the
non-freeze strip on the bottom of the damper door opening.
NOTE: Make sure that the metal edge of the damper door does not contact the non-freeze strip on the bottom of the damper
door opening when the damper door is open. Such contact will damage the components of the damper system.
3. Energise the 29 circuit to close the damper.
4. With the damper closed, position the damper door bracket in the slots on the damper door so the rubber strip on the damper
door makes contact with the top of the evaporator blower housing.
5. Energise the 29A (or 29B) circuit to open the damper and check to make sure that the rubber strip on the damper door is barely
making contact with the non-freeze strip on the bottom of the damper door opening.
6. If necessary, reposition the damper motor and bracket assembly so the rubber strip on the damper door barely makes contact
with the non-freeze strip on the bottom of the damper door opening.
7. Repeat steps 3 through 6 until the rubber strip on the damper door is barely making contact with the non-freeze strip when
the damper is open, and the rubber strip is making contact with the top of the evaporator blower housing when the damper is
closed.
8. Tighten the hardware on the damper motor bracket and damper door bracket and make sure all of the fasteners in the defrost
system are tight.
9. Open and close the damper a few times to make sure that the system operates properly.
Troubleshooting the Damper System
After the damper system has been correctly adjusted, it should stay in adjustment. The motor is protected by a 10 amp fuse that
will open if the motor overloads. If the unit does not go into defrost and the damper does not close, check the defrost fuse. The
defrost fuse is located on the switch panel circuit board near the defrost timer. When an open fuse is replaced, check the following
items before initiating defrost or applying power to the 29 circuit:
• Check for an obvious misalignment of the ball joint link and the damper link that could cause the damper system to bind and
bend the output shaft.
• Make sure that when the damper is open, the metal edge of the damper door does not contact the non-freeze strip on the bottom
of the damper door opening. The rubber strip on the damper door should barely make contact with the non-freeze strip.
• Make sure that the hardware on the damper door bracket and the damper motor bracket is tight enough to hold these
components in place while checking the operation of the damper.