Staircase control unit THZ
49
Maintenance
8
Maintenance
The entire system has to be checked and maintained at regular intervals:
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Function check: monthly
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Maintenance: annually
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Carry out and document maintenance in accordance with the inspection book “Power-operated windows in
ventilation and RWA systems as well as NRWGs”.
Checking and maintenance work may only be carried out by trained personnel.
8.1 Maintenance of the control unit
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Check the mains voltage (230 V AC).
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Check the firm seating and state of the terminal connections.
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Check the cables and connecting wires (for damage).
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Check the displays and switches.
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Check the fuse links.
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Check the installation date of the battery and replace it, if necessary (at the latest 4 years after installation).
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Dispose of non-functional batteries properly.
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Note down the installation date of the new battery.
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Check the system voltages.
Measuring points for system voltages:
1
BATTERY voltage/charge voltage
2
GND reference potential
3
Power pack voltage
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Check charging circuit, without RECHARGEABLE BATTERY.
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Remove the BATTERY fuse F1.
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Activate the “Test load voltage” parameter.
The load voltage is switched on for 10 s (LEDs 2 and 3 flash).
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Measure voltage at measuring point (1). A test voltage of 24 V can be measured.
No short-circuit may be generated during the measurement!
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Insert the BATTERY fuse again after completing measuring.
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Check maintenance charge voltage with fully charged RECHARGEABLE BATTERY:
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Measure charging current (with full RECHARGEABLE BATTERY = charging current < 10 mA)
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Measure RECHARGEABLE BATTERY voltage at measuring point (1) (Reference: 27.0 … 27.6 V at 20 °C)
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If applicable, reset the maintenance interval, see Chapter 6.1.4, Parameter No. 3.
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