2007.03.07 Flow2 stairlift Tab 06: Systematic fault finding
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Error code E51
5.1 Bad rail connection
A bad rail section or something protruding under the rail has activated the emergency limit switch.
This is done as follows:
1. Move the stairlift in the opposite direction with the control
buttons on the service board.
2. Disconnect the charging assembly
(see Tab 7, Section 3.4 - The charging assembly).
3. Set the emergency end switch back to the mid position (see
Fig. 5-1).
4. Move the stairlift to a different position and refit the charging
assembly.
5. Check the rack for protrusions, replace the locking pin as necessary with a new one.
5.2 Stairlift stopped at emergency end stop
The stairlift has not recognised all the pulses from the drive motor and has gone past the stop
position. The emergency end stop has tripped the emergency end switch.
This is done as follows:
1. Disconnect the charging assembly (see Tab 7, Section 3.4 - The charging assembly).
2. Remove the emergency end stop.
3. Set the emergency end switch to the mid position (see Fig. 5-1).
4. Move the stairlift to a different position.
Ride the lift up if it stopped while moving downwards, and down if it stopped while moving
upwards.
This moves the lift away from the obstacle.
5. Check the emergency end switch again (see Fig. 5-1).
6. Fit the charging assembly.
The OSG has now been repaired, but the cause of the stairlift moving too far has not yet been
resolved.
1. Check the wiring on the printed circuit boards.
2. Check the drive motor encoder and the wiring.
3. Replace any defective or suspect parts.
4. Make a few test rides to ensure that everything works properly again.
Fig. 5-1 Emergency end switch in
mid position
1