14. Maintenance
The light is largely maintenance-free.
In environments where extensive dirt or dust is to be expected a regular cleaning of the exterior surface of the
light emission is recommended. The lens and housing are made of polycarbonate and may only be cleaned with
water and washing-up liquid.
Only the manufacturer may undertake changes to the device. The safety parameters must be recalculated and
the functional safety must be tested. Users are not allowed to make changes and any such failure to comply
with this requirement will lead to voiding of the warranty.
Repeat tests (proof test) and life cycle
14.1.
WARNING
Unsafe device conditions
During repeat testing, the safety function must be regarded as unsafe. The impact on connect-
ed downstream devices must be taken into account. Other measures must thus be taken to
ensure the functional safety.
Repeat tests serve to identify faults that cannot be diagnosed automatically.
Repeat tests must be undertaken at the interval specified in the PDF being used, see chapter 6.4. The equip-
ment specific check intervals must be defined in the respective documentation.
The operator is responsible for selecting the type of testing. The test is conducted manually and encompasses
the following tests:
Test *
Test step
Test instruction
Visual check
a) Housing
Mechanical damages, fasteners at installation site, hous-
ing closed and secured
b) Light outlet
Not covered or dirty
c) Cable screw joint
Tight fit, seal for the cable guaranteed
d) Condensed water
No condensed water in inner part of the light
e) Electrical components
No soiling or indicators of corrosion on the components or
printed boards
f) Orientation of the
photodiodes
The photodiodes must be oriented toward the center spot
between the LEDs of the associated strips
Function
g) Visibility
Visual check
-
Light outlet not covered or dirty
-
Brightness sufficient even in bright ambient light-
ing
f) Manual function test
Step-by-step conducting of the function test as described
in chapter 7.2 under 2.). Check the switching status of the
contacts of the fault indicator relay and its correct evalua-
tion via the higher-level control system. The reaction time
for the fault report output are to be controlled see Illustra-
tion 5 – Reaction time of the fault indicator relay
i) Function of the operational
modes
Monitoring of the function of all operating models for the
lamp see Table 5 - DIP switch coding:
- Operating modes (flashing, blinking, rotating signal)
- Sector switch-off (visual control)
- Switchover to night mode (visual control or control of the
PWM of the operating voltage to the LED)
j) Check of the timing
The number of flashes per minute is to be determined
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