Display Messages; Compressor Switch; To Reset Control Center; System Run - Current Limit In Effect Message - York Millennium YK M3 M3 G4 THRU YK S6 S4 J2, YK LB LB G4 THRU YK SE SC J4 Operating & Maintenance Manual

7. Press PROGRAM key.
8.
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
(See Fig. 13, page 19.)
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.
The following displayed messages will be automatically
displayed unless the operator is requesting additional
information via the keypad.
SYSTEM RUN - CURRENT LIMIT IN EFFECT
Displayed when the chiller is running, and the motor
current is equal-to or greater-than the operator-pro-
grammed "XXX % FLA" current limit value. When the
motor current reaches 100% of this value, the pre-
rotation vanes are not permitted to open further. If the
current continues to rise to 104% of this value, the
vanes will be driven closed – not fully closed; only far
enough to allow the current to decrease to a value less
22
11. Press ADVANCE DAY key to scroll to desired mode.
is displayed.
12. When the desired mode is displayed, press EN-
13.
14. Press ACCESS CODE key to exit PROGRAM mode
15.

COMPRESSOR SWITCH

To RESET Control Center:

*NOTE: The operator cannot start the compressor (us-

DISPLAY MESSAGES

than 104% of the operator-programmed "XXX % FLA"
current limit.
For example:
With the operator-programmed "% CURRENT LIMIT"
set at 50% and the FLA of the chiller equal to 200A, the
current limit circuit would perform as follows:
Each time this key is pressed, a different mode is
displayed as above:
TER key.
PROGRAM MODE, SELECT SETPOINT
and terminate access to PROGRAM mode.
ACCESS TO PROGRAM MODE DISABLED
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.
ing this switch) when the Control Center is in
REMOTE mode.
(100%) (50% x FLA) = Vanes inhibited from open-
ing further.
(104%) (50% x FLA) = Vanes driven toward close
position.
is displayed.
is displayed.
YORK INTERNATIONAL