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EN
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21.12.2011
ENG
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NGV A3
VALVE
M
ANUAL
I
NSTALLATION
, U
SE AND
M
AINTENANCE
6 MAINTENANCE AND FAULT ANALYSIS
6.1 PROGRAMMED MAINTENANCE
For a correct and safe lift use, it is necessary to make a preventive programmed maintenance, following a
fixed plan.
To define the periodical maintenance frequency, you should consider more events, particularly :
-
Number of travel per year
-
Travelling and stopping periods
-
Age and condition of the lift
-
Site and type of the building in which the lift travel
-
Passengers and goods demand
-
Inside and outside working condition (climate, vandalism, etc.)
In the next table, parts are shared in groups and for each group is shown the type of check and its longest
frequency recommended. Checks operative instructions are detailed in the maintenance schedules on
chapter.
Please, note that all checks are applicable only if the part is really installed..
6.2 PERIODICAL MAINTENANCE AND CHECKS TABLE
Operation checks
Recommended maximal Frequency
I
NSTALLAZIONE
MESI
ANNI
Valve gaskets seal
þ
6
Oil level check up
þ
6
Characteristics of the oil
þ
6
Motor protection operation
þ
6
Filters
þ
1
Pressure check
þ
6
Pressure gauge shut off (4)
þ
6
Pressure test (static pressure x2)
þ
6
Ball valve seal
6
Labels, signs and schemes
þ
6
Overall check-up
5
6.3 MAINTENANCE SCHEDULES
What to do: (see image)
Valve gaskets seals
-
At the end of installation, and during check-
ups, verify the gasket seals, in the following
way: with the oil at room temperature close
the ball valve (B) and open the pressure
gauge shut off (4). Check that the pressure
gauge reading on pressure gauge should
not drop more than 4 bar in 5 minutes.
Oil level check-up.
-
With the elevator at the highest floor, check,
using dipstick (F) or level indicator (L), that
the oil level is above the minimum level and
(the motor should be fully covered in oil).
VSMA
VMD
PT
MAN
B
S1
SM
S3
S2
3
5
1
4
ISP
PAM
ï
ML
Oil Characteristics
-
Check visually that no change are occurred in the oil conditions. Perform this check after leaving the
system down for a few hours. Once every year it should be better to discharge a little amount of oil
from cap (J) and to check if it’s clean. If oil is not clean keep on discharging oil until you see to flow
clean oil.