ST16135-00E
21
8
Adjustments
8
Adjustments
8.1
Compressor Control (Fig. 8.1)
The compressor controller has a Customer Menu (P10) that has
parameter settings that can be modified within set limits to suit
system requirements.
The controller has a built-in time delay to prevent pressurised
restart that inhibits the automated motor start sequence and
controls the vent solenoids.
The venting system (REVS) is controlled by solenoid valves
mounted on the starter enclosure under the top panel cover.
A normally closed solenoid valve (A) controls compressor delivery
pressure using the REVS start system to reduce power.
The normally open solenoid valve (B) vents the compressor
during the REVS sequence for offload power savings and after
stopping allows quick restart if required.
System pressure is shown on the controller, compressor pressure
can only be viewed on the gauge fitted to the intake end cover.
Fig. 8.1 - Solenoid Locations
8.2
Customer Menu (P10)
To alter default values in Menu P10, or view error codes, press
the plus up and minus down buttons together, an access entry
screen will be displayed.
Use plus up or minus down button to enter zero for the first
flashing character, then press ENTER. The next character
flashes, repeat as before and enter zero for characters two and
three, but enter 9 for the final character. With all four characters
set, press ENTER.
Press plus up or minus down button to scroll though available
parameter settings, press ENTER to select.
(a)
PU - Unload pressure
(b)
PL - Load Pressure
(c)
OD - Drain Open Time.
(d)
DI - Drain Interval Time.
(e)
RT - Run on Time after PU.
(f)
P> - Pressure Display Units.
(g)
T> - Temperature Display Units.
(h)
01-15 - Error Log.
A selected item will flash, press plus up or minus down button to
change a value or select an alternative, press ENTER to select.
During changes, if no key activity is detected for one minute, the
display will revert to the normal display mode (P00) view only,
pressing ESCAPE also causes the display to revert.
The error log menu retains the most recently recorded fault codes
and the hours when the fault occurred. The display is view only
and will automatically alternate between the two values.
An explanation of the fault codes recorded is given in Section 10,
Fault Finding.
8.3
Operating Mode (AUT/MO)
Automatic stop/start is set as default, for continuous run on single
speed units select MO - MAN, this can be set with the compressor
running or stopped.
In menu P21 (access code required), press plus up or minus
down button to scroll to AUT, press ENTER, AUT will flash, press
plus up or minus down to select MO, press ENTER to select.
WARNING !
PRESSURE CONTROL ADJUSTMENTS SHOULD
BE CONDUCTED BY AUTHORISED HYDROVANE
SERVICE ENGINEERS. FAILURE TO COMPLY
WITH THIS REQUIREMENT MAY INVALIDATE
THE COMPRESSOR WARRANTY.
8.4
Pressure Adjustment - Single Speed
In menu P10, press plus up or minus down button to scroll to
either, PU unload pressure or PL load pressure. Press ENTER,
with PU or PL flashing, press ENTER, the value will flash, press
plus up or minus down button to change the value to the desired
pressure and press ENTER to select.
The PL load should be set 0.5 bar below the nominal pressure
required and PU unload 0.5 bar above, servo valve pressure is
1.0 bar above the nominal.
Both parameters PL load and PU unload pressure must be set on
the controller together with manual servo adjustment , Para 8.6,
Servo Valve (Fig. 8.2) to ensure that the compressor functions
correctly.