Specifications
Cooler Heater Control — Accessory cooler heaters
can be ordered for the 30GX chillers. If installed and en-
abled, these heaters are turned on only when the machine is
in the off state and the chiller is in a saturated suction tem-
perature freeze condition.
Keypad and Display Module (Also Called
HSIO-II) —
This module allows the operator to commu-
nicate with the processor. It is used to enter configurations
and set points and to read data, perform tests, and set sched-
ules. The device consists of a keypad with 7 function keys,
5 operative keys, 12 numeric keys (0 to 9, •, and -), and a
2-line, 24-character alphanumeric liquid crystal display. See
Fig. 7.
ACCESSING FUNCTIONS AND SUBFUNCTIONS —
Table 7 shows a brief description of the keypad buttons.
Table 8A shows the 6 functions (identified by name) and the
subfunctions (identified by number). Table 8B shows the 6
functions (identified by name) and the subfunctions (iden-
tified by number) when using the optional LID-2B control-
ler. Table 9 shows a brief example on how to access
subfunctions.
NOTE: It is not necessary to use the through every
item in a subfunction. For example, if you wanted to read
the oil pressure for the A1 compressor, press , then
press to go directly to A1 Oil Pressure. Use a simi-
lar procedure to view an item near the bottom of a subfunc-
tion. To view the Circuit A Oil Switch status, press
and . Use a similar procedure to view an item near
the bottom of a subfunction. To view Condenser Pump Flow
Switch status, press , , and . This proce-
dure is available in all functions except the TEST function.
AUTOMATIC DEFAULT DISPLAY — When the keypad
has not been used for 10 minutes, the display automatically
switches to the rotating automatic default display. This dis-
play contains the 5 parts shown below.
Entering Fluid Temp
xx.x° F
Leaving Fluid Temp
xx.x° F
Percent Total Capacity
xxx.x%
Total Number of Alarms
xx
MODES : MODE_TBL
Current active modes
All functions are made up of a group of subfunctions. To
enter a subfunction, first press the subfunction number de-
sired. Then press the function key in which the subfunction
resides. To move within that subfunction, press the up or
down arrow keys. Another subfunction may be entered at
any time by pressing the subfunction number, then the func-
tion key. Depending on system type and configuration, all
displays may not be shown.
Table 7 — Keypad and Display Module Usage
FUNCTION
KEYS
USE
STATUS — For displaying diagnostic codes and
current operating information about the machine.
HISTORY — For displaying run time, cycles, and
previous alarms.
SERVICE — For entering specific unit configuration
information and enabling manual control function.
SCHEDULE — For entering occupied/unoccupied
schedules for unit operation.
ALGORITHM — Not used.
SET POINT — For entering operating set points
and day/time information.
TEST — For testing operating of the analog and
discrete outputs.
OPERATIVE
KEYS
USE
EXPAND — For displaying a non-abbreviated
expansion of the display.
CLEAR — For clearing the screen of all displays.
UP ARROW — For returning to previous display
position.
DOWN ARROW — For advancing to next display
position.
ENTER — For entering data.
CLEAR
ENTER
1
2
3
4
5
6
7
8
9
0
.
-
STAT
SET
SCHD
EXPN
EDIT
SRVC
HIST
ALGO
TEST
ALRM
TWENTY-FOUR CHARACTER
TWO-LINE LCD DISPLAY
LEGEND
LCD — Liquid Crystal Display
Fig. 7 — Keypad and Display Module
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