D877 MGB Rev01 HE250.docx
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Subsequently the shutdown of the RDY board signal also remove the ERN and ERS solenoid inputs. The RDY
board signal is active again after about 0.5 s, when the valve unit will be ready for the next travel. However do
not delay to remove the ENR and ERS solenoid inputs more than 2 s from the arrival on the stopping contact
in the shaft.
2.17 Releveling
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UPWARD RELEVELING (DSP=u7, u8, u9 )
Relevelling operations follow the sequence indicated in the normal upward cycle but without the use of the
HSP high speed signal.
The parameters P214, P215 e P216 define the acceleration distance, the movement speed and the stopping
distance.
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DOWNWARD RELEVELING (DSP=d7, d8, d9)
Relevelling operations follow the sequence indicated in the normal downward cycle but without the use of the
HSP high speed signal (or SP3 if the parameter P453 = 1).
The parameters P314, P315 e P316 define the acceleration distance, the movement speed and the stopping
distance.
2.18 Rapture valve test (DSP=FC, FP)
Block the system to exclude the possibility of travel.
Set the working selector RSW = 3 (DSP=FC) and then press S1 button until appear FP on display.
This prepares the valve unit to execute the next descent with increased speed to verify the intervention of the
rupture valve of the piston, as required by point 6.3.8 of the EN81-20.
Go upward, with half load in the cabin, on a high floor then run a normal downstroke (to see the point
DOWNWARD 2/7 in the present instruction), the increase of speed compared to the norrmal speed is defined
by parameter P422.
During drop test the value of reached maximum speed is stored in parameter P556 the maximum point of hight
speed.
At the end of the downward maneuver the board no more provide the signal RDY if not performing a new drop
test, by pressing the button S1 as described above, or a normal maneuver setting the selector RSW = 0.
Note: As an alternative to the use of RSW switch, you can activate the test condition setting parameter 705 to
the value 1. At the end of the test the value of the parameter returns automatically to 0.
