York Millennium YK M3 M3 G4 THRU YK S6 S4 J2 - Manual (Page 21)

YORK INTERNATIONAL 21
FORM 160.49-O2
NO. 6
ACTUAL POS = XX MILS; REF = YY MILS – ACTUAL POS is
the distance between the high speed thrust collar and
the proximity probe that is used to measure the position.
REF is the reference position established at time of com-
pressor manufacture.
NO. 7
HIGH SPEED DRAIN TEMP = XXX.X °F – Temperature of oil
in high speed drain line.
To hold any of the above messages, press the DISPLAY
DATA key, then press the DISPLAY HOLD key. The
message will be displayed and updated every 2 sec-
onds until the DISPLAY DATA key is pressed again,
whereupon the next message is displayed. To return to
the normal foreground messages, press the DISPLAY
HOLD key.
HISTORY PRINT – This key is used to initiate a history
print to the optional printer. Refer to Form 160.49-N7 for
operation of this key.
OPERATING MODES
The MicroComputer Control Center can be operated in
four different operating modes as follows:
SERVICE – enables all the Service keys except DIS-
PLAY DATA, MANUAL OIL PUMP, and HISTORY
PRINT, which are enabled in all modes. See “Service
Keys”, page 20.
LOCAL – This is the normal operating mode. The com-
pressor can be started and stopped from the Control
Center. Also, the Display and Setpoints parameters can
be displayed.
PROGRAM – Allows the operator to program the Set-
points parameters, and change operating modes.
REMOTE – In this mode, the Control Center will ac-
cept control signals from a remote device (i.e., Energy
Management System) or cycling input. The control sig-
nal inputs are:
1. Remote Start
2. Remote Stop
3. Remote LCWT Setpoint
4. Remove Current Limit Setpoint
NOTE: The compressor can be stopped by the COM-
PRESSOR switch, regardless of the operating
mode. The switch must be in RUN position to
enable REMOTE mode. The operator cannot
locally start the compressor using the COM-
PRESSOR 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,
LOCAL OPERATING MODE IN EFFECT is displayed.
• If the Control Center is in REMOTE mode,
REMOTE OPERATING MODE IN EFFECT is displayed.
• 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.