Johnson Controls YORK OPTIVIEW YK Series Service Instructions Manual page 251

FORM 160.54-M1
and it must be equipped with the 128K BRAM
(031-02565-000). With this Microboard, Program
Jumpers JP14 (BRAM size) and JP17 (COM 2
Serial Mode) must be configured appropriately
per SECTION 4 - Microboard 031-02430-000
AND 031-02430-001.
1. Chiller must be stopped and RUN switch
must be in Stop-Reset position.
2. Select SETUP Screen.
3. Press CHANGE SETTINGS key.
4. A green box will appear around the first
changeable setpoint. Use ▲▼ keys to place
box around the Motor Communications Pro-
tocol setpoint.
5. Press  key. A dialog box will appear with
the range of settings. Use ◄ ► keys to select
"YORK" or Modbus, as appropriate.
6. Press ENTER () key.
Motor Node ID
(Software version C.OPT.01.16.xxx (and later))
Only displayed when Modbus is selected for the Motor
Communications Protocol setpoint above. The Motor
Node ID must be set to match the setting of the VSD
Logic Board Modbus Address Switch SW3. The ad-
dress assigned to the VSD Logic Board is "1". This
is done by placing the VSD Logic Board Modbus Ad-
dress Switch SW3 position 1 to "ON" with all other
positions to OFF, and setting this setpoint to "1.
1. Chiller must be stopped and RUN switch must be
in Stop-Reset position.
2. Select SETUP Screen.
3. Press CHANGE SETTINGS key.
4. A green box will appear around the first change-
able setpoint. Use ▲▼ keys to place box around
the Motor Node ID setpoint.
5. Press  key. A dialog box will appear with the range
of settings. Use numeric keys to set this value to "1".
6. Press ENTER () key.
Full Load Amps (VSD)
This is the Full Load Amps (FLA) of the chiller as
listed on the SALES ORDER Screen. The microboard
uses the programmed value to perform Current Lim-
JOHNSON CONTROLS
SECTION 32 - SYSTEM CALIBRATION, SERVICE SETPOINTS AND RESET PROCEDURES
it functions and display compressor motor current in
terms of %FLA.
1. Place Compressor Start/Stop Switch in the Stop-
2. Select VSD DETAILS Screen from the MOTOR
3. Inside the VSD, locate the small trim pot on the
4. While monitoring the VSD Full Load Amps 000.0
Full Load Amps (MV VSD)
This is the Full Load Amps (FLA) of the chiller as
listed on the SALES ORDER Screen. The microboard
uses the programmed value to perform Current Lim-
it functions and display compressor motor current in
terms of %FLA.
1. Select MOTOR Screen.
2. Press FULL LOAD AMPS key.
3. Use NUMERIC Keypad keys to enter the correct
4. Press ENTER () key.
Pre-rotation Vanes Position Potentiometer
Refer to the Pre-rotation Vanes Calibration procedure
in this section.
Adaptive Capacity Control
1. Select ACC DETAILS Screen.
2. The following keys are available:
Reset (O) position.
Screen.
VSD Logic Board; (R34) on Logic Board 031-
02506; (R28) on all other Logic Boards.
A message on the VSD DETAILS Screen, adjust
this trim pot until the correct Full Load Amps val-
ue is displayed. Clockwise will increase the value.
value.
a. Surge Map Clear – Clears all previously es-
tablished surge points that are stored in mem-
ory. When this key is pressed, a dialog box ap-
pears requesting the special ACC Map Clear
Password. Enter 0 3 6 8 and press the ENTER
() key. A message is displayed advising the
clearing is in progress. If ACC Board is pres-
ent, press switch SW1 (for at least 1 second)
on the ACC Board within 15 seconds of press-
ing the ENTER key. Another message is dis-
played when the clearing has completed. IM-
PORTANT! – This should not be performed
unless advised by YORK factory Service.
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