20
YORK INTERNATIONAL
• If the Control Center is in SERVICE mode,
SERVICE OPERATING MODE IN EFFECT
is displayed.
To change operating mode, proceed as follows:
1. Press ACCESS CODE key.
2.
ENTER VALID ACCESS CODE _ _ _ _
is displayed.
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 dis-
played when the ENTER key is pressed. If
this occurs, enter the correct access code
(9675) and proceed.
6.
ACCESS TO PROGRAM KEY AUTHORIZED
is displayed.
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
PROGRAM key will be automatically dis-
abled and the operator must return to step
No. 1 to gain access.
7. Press PROGRAM key.
8.
PROGRAM MODE, SELECT SETPOINT
is displayed.
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 EN-
TER key.
13.
PROGRAM MODE, SELECT SETPOINT
is displayed.
14. Press ACCESS CODE key to exit PROGRAM mode
and terminate access to PROGRAM mode.
15.
ACCESS TO PROGRAM MODE DISABLED
is displayed.
COMPRESSOR SWITCH
(See Fig. 13, page 18.)
This rocker switch is used to locally operate the com-
pressor. It is used to start, run and stop the compres-
sor. Also, it resets the Control Center after a safety
shutdown.
To START* chiller compressor in LOCAL mode:
Move COMPRESSOR switch from STOP/RESET
to START position. Switch will spring-return to RUN
position.
To STOP compressor:
Move switch from RUN to STOP/RESET position.
To RESET Control Center:
Following a safety shutdown, the operator is re-
quired to reset the Control Center prior to restart-
ing the system. Move switch from RUN to STOP/
RESET position.
NOTE: The operator cannot start the compressor (us-
ing this switch) when the Control Center is in
REMOTE mode.
