Quantech QWC4, Installation Operation & Maintenance, Page: 122 / 156

QUANTECH
122
FORM QWC4-NM1 (221)
ISSUE DATE: 02/28/2021
SECTION 6 - OPERATION
MANUAL OVERRIDE AND PRINT KEY
FIGURE 58 - MANUAL OVERRIDE AND PRINT KEY
LD19539
MANUAL
OVERRIDE
KEY
PRINT
KEY
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.
LD16479
9-PIN RS-232 (DB9)
Control Board
Terminal Block TB1
DTE
CTS
RD
GND
DSR
GND
TXD
25-PIN RS-232 (DB25)
4
8
2
5
11
20
5
3
7
RS-232
RS-232
DTE
CTS
RD
GND
DSR
GND
TXD
TB1-1
TB1-2
TB1-3
TB1-4
TB1-5
TB1-6
TB1-1
TB1-2
TB1-3
TB1-4
TB1-5
TB1-6
Control Board
Terminal Block TB1
FIGURE 59 -
PRINTER CABLE CONNECTION
FROM QWC4 CHILLER TO A COMPUTER
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.