Figure 58 - Manual Override And Print Key; Figure 59 - Printer Cable Connection From Yvwa Chiller To A Computer - York YVWA Installation Operation & Maintenance

SECTION 6 - OPERATION

FIGURE 58 - MANUAL OVERRIDE AND PRINT KEY

MANUAL OVERRIDE
If this key is pressed during a scheduled shutdown,
the STATUS key will display MANUAL OVERRIDE,
which indicates that the DAILY SCHEDULE is being
ignored, and the chiller will start when chilled liquid
temperature allows; REMOTE CONTACTS, UNIT
SWITCH and SYSTEM SWITCHES permitting. This
is a priority message which cannot be overridden by
anti-recycle or fault messages. Only use this key in
emergencies or for servicing, which will automatically
disable itself after 30 minutes.
PRINT CHOOSE PRINT REPORT
◄ ► XXXXXXXXXXXXXXXXXXXXX
PRINT is used to print any of the following:
• Current operating data (real time data)
• A complete history of all history (fault) buffers
• All normal shutdowns (compressor cycling, chill-
er shutdown, etc.)
• History (fault) data of a specific fault. History
Buffer 1 will always be the most recent fault his-
tory printout.
122
MANUAL OVERRIDE AND PRINT KEY
LD19539
Use the following connections to set up the chiller to
print to a computer as shown in Figure 59 on page 122
or to a printer as shown in Figure 60 on page 123.
9-PIN RS-232 (DB9)
DTE
4
CTS
8
RD
2
GND
5
25-PIN RS-232 (DB25)
11
DTE
20
CTS
5
RD
3
GND
7
FIGURE 59 - PRINTER CABLE CONNECTION
FROM YVWA CHILLER TO A COMPUTER
FORM 201.30-ICOM1 (519)
ISSUE DATE: 05/22/2019
MANUAL
OVERRIDE
KEY
PRINT
KEY
Control Board
Terminal Block TB1
RS-232
TB1-1
DSR
TB1-2
TXD
TB1-3
TB1-4
GND
TB1-5
TB1-6
Control Board
Terminal Block TB1
RS-232
TB1-1
DSR
TB1-2
TXD
TB1-3
TB1-4
GND
TB1-5
TB1-6
LD16479
JOHNSON CONTROLS