YORK INTERNATIONAL
37
FORM 160.60-O1
The MicroComputer Control Center can be operated in
four different operating modes as follows:
1.
SERVICE
enables all the
SERVICE
keys except
MANUAL OIL PUMP
, and
HISTORY PRINT
, which
are enabled in all modes. See
Service Keys
, page
32.
2.
LOCAL
This is the normal operating mode. The
chiller can be started and stopped from the Control
Center. Also, the
Display
and
Setpoints
parameters
can be displayed.
3.
PROGRAM
Allows the operator to program the
Set-
points
parameters, and change operating modes.
4.
REMOTE
In this mode, the Control Center will ac-
cept control signals from a remote device (i.e. Energy
Management System) or cycling inputs. The control
signal inputs are:
Remote Start
Remote Stop
Remote LCWT Setpoint
Remote Engine Load Limit Setpoint
NOTE: The chiller can be stopped by the
COMPRES-
SOR
switch, regardless of the operating mode.
The switch must be in
RUN
position to en-
able
REMOTE
mode. The operator cannot
locally start the chiller using the
COMPRES-
SOR
switch when in the
REMOTE
mode.
To determine which operating mode the Control Center is
presently in, simply press the
MODE
key.
If the Control Center is in
LOCAL
mode, this is dis-
played:
LOCAL MODE
If the Control Center is in
REMOTE
mode, this is
displayed:
REMOTE MODE
If the Control Center is in
SERVICE
mode, this is
displayed:
SERVICE MODE
To change operating mode, proceed as follows:
1. Press
ACCESS CODE
key.
2. This message appears:
ENTER VALID ACCESS CODE
3. Using
Entry
keys, enter
9 6 7 5
.
4. As each digit is entered, the characters
Y O R K
are
displayed.
NOTE: If digits other than
9 6 7 5
are entered,
Y O R K
is still displayed.
5. Press
ENTER
key.
NOTE: If digits other than
9 6 7 5
were entered in step
No. 4,
INVALID ACCESS CODE
is displayed when the
ENTER
key is
pressed. If this occurs, enter the correct ac-
cess code (
9 6 7 5
) and proceed.
6. This message is displayed:
ACCESS TO PROGRAM KEY AUTHORIZED
NOTE: Unless terminated by pressing the
ACCESS
CODE
key again, the operator will have ac-
cess to the
PROGRAM
key for 10 minutes.
When 10 minutes have elapsed, access to
the
PROGRAM
key will be automatically dis-
abled and the operator must return to step
No. 1 to gain access.
7. Press
PROGRAM
key.
8. This message is displayed:
PROGRAM MODE, SELECT SETPOINT
9. Press
MODE
key.
10. The mode that has been previously selected will be
displayed as follows:
LOCAL MODE SELECTED
- or -
SERVICE MODE SELECTED
- or -
REMOTE MODE SELECTED
11. Press
ADVANCE DAY
key to scroll to desired mode.
Each time this key is pressed, a different mode is
displayed as above.
12. When the desired mode is displayed, press the
EN-
TER
key.
13. This message appears:
PROGRAM MODE, SELECT SETPOINT
14. Press
ACCESS CODE
key to exit
PROGRAM
mode and terminate access to
PROGRAM
mode.
15. This message appears:
ACCESS TO PROGRAM MODE DISABLED
OPERATING MODES
S
E
C
T
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