14
OM 200MICRO
Category Group
The keys in this group provide quick access to strategic menus throughout the menu tree-structure.
This reduces the need to step through all the menus, one by one, in order to reach the desired
information.
Figure 12, Category Group
Status Key
Menus and menu items in this category provide information on the MicroTech operating conditions
and the chiller operating conditions. The entries under each menu item in this category provide
information only and are not changeable through the MicroTech keypad.
Pressing the "STATUS" key at any time shifts the display to Menu #1 which is the first menu of the
STATUS category.
Control Key
Menus and menu items in this category provide for the adjustment of all the unit control parameters.
These include capacity control, pump control and cooling tower control parameters as well as time
schedules and alarm limits. The entries under these menu items are changeable through the
MicroTech keypad.
Pressing the "CONTROL" key at any time shifts the display to Menu #11
(Control Mode)
which is
the first menu of the CONTROL category.
Alarm Key
Menus and menu items in this category provide information regarding current and previous fault
conditions along with the operating temperatures and pressures at the time the fault occurred.
Pressing the "ALARM" key at any time shifts the display to Menu #27 which is the first menu of the
ALARM category.
Switch Key
Pressing the "SWITCH" key at any time toggles the display between the current menu
(Status/Control)
item and the related menu
(Control/Status)
item somewhere else in the tree-
structure. This allows checking actual conditions against setpoints. The status menu numbers that
have related control menus are 1, 2, 3, 6 and 7. The reciprocal occurs when in the control menu,
pressing the "SWITCH" key toggles to the related status menu showing actual conditions. The
control menu numbers that have related status menus are 11, 12, 18, 19 and 22. Pressing the
“SWITCH” key the second time takes the operator back to the original menu item. For example, if this
key is pressed while the current menu item is menu item 2B
(Leaving Evaporator =)
, the display
shifts to menu item 12B
(Local Evaporator Setpoint =).
This provides for easy review of actual
versus setpoint values.
