Page 67 of 102
TVL 351
ISSUE 15
UCM Detection - Ethos Two “A3 Dual Brake Interface” + “A3 Over-Speed Governor Solenoid lnterface”.
These systems use the lock bridging / dual door zone circuit on the Ethos Two control board to detect UCM. To
test this element of the system the DZ signal can be removed whilst the lift is re-levelling with its doors fully
open. Perform the following checks to prove this element:
a) Place the Ethos Two in “Special Service” via the car key switch or using the “Activate Service” menu in the
checklist screen, this will hold the doors in the fully open position. (Make sure the car has a suitable barrier
in it to stop passengers using the lift.)
b) Using the “Floor Trim” screen adjust the current floor level by 20 to 30mm.
c) Once the panel is re-levelling, remove the DZ signal from the terminal rail. The control panel should signal
the brake or OSG solenoid to drop immediately.
d) The Ethos Two will log a “Not in Door Zone – A3” event which is manually resettable via the solutions menu.
e) This simulates the situation when the car has unintended movement outside the door zone whilst the car
has its doors is open.
f) Repeat with a trim of -20 to -30mm to prove in both up and down travel directions.
UCM Stopping - Ethos Two “A3 Dual Brake Interface”.
Self-monitoring functionality in the Ethos Two control panel for the verification of the correct opening and closing
of the lift machine brake as part of unintended car movement protection of the lift.
To test the dual brake self-monitoring feature during the various travel states perform the following:
a) Starting: Remove the BLC1 or BLC2 inputs prior to stating. The Ethos Two will log a “Brake Fail, Starting“
event.
b) Moving: Remove the BLC1 or BLC2 inputs during running. The Ethos Two will log a “Brake Fail, Moving “
event.
c) Stopping: Link CT1 to BLC1 or BLC2 inputs during running. The Ethos Two will log a “Brake Fail, Stopping“
event after the brake has dropped.
d) Three consecutive “Start” or “Moving” failures will invoke a “Brake Confirm Fail” event; a single “Stopping”
failure will invoke the same event. The confirm fail event needs to be reset by a competent person via the
solutions menu.
UCM Stopping - Ethos Two “A3 Over-Speed Governor Solenoid lnterface”.
Ethos Two control panel functionality to operate the over-speed governor solenoid activation and the verification
of the correct opening and closing of the solenoid as part of unintended car movement protection of the lift.
To test the verification of this feature perform the following tests:
a) Before the Ethos Two goes on a journey remove the “SGS” input to the panel or Ethos Two. Ethos will log a
manually resettable event “Safety Gear Operated” this can be reset via the solutions menu.
b) Prior to starting a journey remove the OSG switch wire in the BC1 terminal, the Ethos will timeout during the
start and log a “Drive Start Fail” event. This simulates OSG solenoid failure to energise.
c) To prove the OSG solenoid is dropped prior to a journey remove the OSG switch wire from BC4 terminal.
The Ethos will timeout during the start and log a “Drive Start Fail” event. This simulates OSG solenoid failure
to de-energise.
d) To prove failure of the OSG solenoid to lift: Prior to starting a journey remove the OSG solenoid wire from
PK+ terminal, the Ethos will timeout during the start and log a “Drive Start Fail” event.
e) These 3 tests will prove the OSG solenoid and its contacts are operating correctly.
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