OMM TGZ-1 TGZ 040A through TGZ 190A 71
Wate r Co o le d = O N
TEST UNIT (5)
Twr Bypass= XXX.X %
Twr VFD= XXX.X %
TEST UNIT (6)
EXV Cir 1= XXX.X %
EXV Cir 2= XXX.X %
Editing Review
Editing shall be accomplished by pressing the ENTER key until the desired field is
selected. This field shall be indicated by a blinking cursor under it. The arrow keys shall
then operate as defined below.
CANCEL (Right) Reset the current field to the value it had when editing began.
DEFAULT (Left) Set value to original factory setting.
INCREMENT (Up) Increase the value or select the next item in a list.
DECREMENT (Down) Decrease the value or select the previous item in a list.
During edit mode, the display shall show a two-character wide menu pane on the right as
shown below.
SET UNIT SPs (X) <D
(data) <C
(data) <+
(data) <-
Additional fields can be edited by pressing the ENTER key until the desired field is
selected. When the last field is selected, pressing the ENTER key switches the display out
of “edit” mode and returns the arrow keys to “scroll” mode.
Alarms
When an alarm occurs, the alarm type, limit value (if any), date, and time are stored in the
active alarm buffer corresponding to that alarm (viewed on the Alarm Active screens) and
also in the alarm history buffer (viewed on the Alarm Log screens). The active alarm
buffers hold a record of the last occurrence of each alarm and whether or not it has been
cleared. The alarm can be cleared by pressing the Edit key. A separate buffer is available
for each alarm (High Cond Pressure, Evaporator Freeze Protect, etc.). The alarm history
buffer holds a chronological account of the last 25 alarms of any type.
Security
Two four-digit passwords provide OPERATOR and MANAGER levels of access to
changeable parameters. Either password can be entered using the ENTER PASSWORD
screen which can be accessed either through the SET OTHER menu or by simply pressing
the ENTER key while on one of the SET screens. The password can then be entered by
pressing the ENTER key, scrolling to the correct value with the UP and DOWN arrow keys,
and pressing ENTER again. Once the correct password has been entered, the previously
selected screen will reappear. Once a password has been entered, it will remain valid for 15
minutes after the last key-press.
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