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.
FORM
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
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. |
|
| 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 PROGRAM key will be automatically dis- abled and the operator must return to step No. 1 to gain access.
YORK INTERNATIONAL | 21 |
