19.
Routine Inspection. Testing and Maintenance - continued
19.12 Open the damper using a 12mm A/F spanner on the TD box. Check for foreign
items in and around blades, paying particular attention to blade fishtails. Remove
any obstructions.
19.12.1 Clean the inside of the damper case where the blades make contact with the
gasket seals. Use a soft cloth with a light application of light lubricant. (Connect
Duck Oil recommended).
19.12.2 Lightly apply a light lubricant into blade axle bearings depressing the side gaskets
to allow access. It may be necessary to re-apply lubricant a couple of times, whilst
operating the damper using the 12mm A/F spanner, until the torque has reduced to
less than 5Nm for mid-range travel, and 10Nm for full damper closure.
19.12.3 There should be no more than a thin film of lubricant applied. Remove all excess
lubricant. It is particularly important as excess oil will tend to collect dirt and dust
which will have a negative effect on dampers remaining clean.
19.12.4 Refit the actuator (Refer to section 16).
19.12.5 Switch on power to the actuator.
19.12.6 The actuator should reach its 'powered state' position in <60 seconds. If it does not.
refer to sections 20 and 22.
19.12.7 Replace access doors, and ensure the damper is left in its 'powered state'.
19.12.8 Record all work that has been undertaken in the maintenance log.
19.12.9 It is important to log and review maintenance frequency based on inspections and
test history.
19.12.10 The actuator is maintenance-free.
20.
Fault Finding
20.1 TF Actuator
21.
Actuator orientation change
21.1 Refer to sections 16 and 18. Position the actuator to the required position as necessary.
FSD-TD - Installation Operation and Maintenance Instructions
SYMPTOM
FAULT
ACTION
Green LED on the
thermal fuse (TF)
is not illuminated
No power / incorrect supply
Check supply
TF tripped. Remove TF from
duct, separate two halves,
continuity check the two contacts
within the probe section (or test
with new probe)
If open circuit, replace probe
Actuator faulty
Replace actuator
Synchronization of actuator and
damper incorrect
Remove actuator and refit.
(Refer to sec1ions 16 and 17)
Damper seized
Refer to section 21.1
Blades do not
travel fully open /
closed
Lack of maintenance to the blade
bearings
Apply DEB duck oil or similar
to the side gasket and blade
bearing and wipe away any
dirt/dust with a soft cloth
Noisy damper
during operation
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