Planmeca Compact I Technical Manual page 52

Chapter C - SERVICE MODE
n 31
In this service mode the service mode navigation type can be selected.
0 = Normal navigation. The service mode number is changed in steps of one when using the
chair up and down keys ("C" or "D") on the control panel.
1 = factory use
2 = Accelerated navigation. The service mode number is changed in steps of 5 when the chair
up or down is pressed and held down.
3 = factory use
The factory default is 2.
n 32
This service mode shows the signal from the spray/chip air line pressure sensor. The display
is either in bar, kPa or PSI, depending of the setting in the service mode n.17. The pressure is
measured inside the IMUX just after the proportional valve controlling this line. Therefore the
pressure measured (under normal flow conditions) is always higher than this same pressure
measured at the instrument end of the hose.
n.33 Factory test
Reserved for factory use.
n 34
This service mode shows the signal from the spray water line pressure sensor. The display is
either in bar, kPa or PSI, depending of the setting in the service mode n.17. The pressure is
measured inside the IMUX just after the proportional valve controlling this line. Therefore the
pressure measured (under normal flow conditions) is always higher than this same pressure
measured at the instrument end of the hose. Because of the construction of the water channel
the pressure drops very slowly towards 0 (zero).
n 35
Reserved for factory use.
n.36
This service mode selects the mode of operation of the IMUX instrument select membrane
control valves. The unit software must be upgraded if mode 1 is not available and needs to be
used. This feature was added to the software version 1.23 (and later).
Mode 1 is recommended to be selected in new units, since in this mode all instrument select
membranes in the IMUX will stay normally closed (pressurized). The benefit is that there is no
risk of water leakage or occasional water drops from the instruments. In this mode the integral
spray water back pressure valves are only needed when the unit is powered off. This continu-
ous activation of the (4) valves causes some additional heat dissipation in the IMUX (about
8W). Early IMUX assemblies have not been tested with this higher power dissipation and
could give problems (due to some tight tolerances) with sticking doriot arm pins. Assuming
that the pins are replaced with thinner ones, then the mode 1 can be used in all IMUXes.
Mode 0 is recommended to be selected in older units with IMUX assemblies manufactured
earlier than Jan. -96. In this mode all instrument select membranes stays whenever possible
open (not pressurized). Then prevention of water dropping from instruments (when idle) is
fully dependent of the operation of the integral back pressure valves.
C-24 Planmeca Compact i
Select the service mode navigation type (0, 1, 2, 3)
Show active instrument spray air pressure
(n.nn bar; nnn kPa; nn.n PSI pressure)
Show active instrument spray water pressure
(n.nn bar; nnn kPa; nn.n PSI pressure)
Factory test
Set mode of IMUX membrane operation (n mode = 0, 1)
SERVICE MODE DETAILED DESCRIPTION
Technical Manual