System Switches Key - Quantech QTC4 STYLE A Series Installation Operation & Maintenance

Air-cooled screw liquid chillers with variable speed drive, 150 - 500 tons, 525 - 1750 kw, 2 compressor, 60 hz
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FORM QTC4-NM1
ISSUE DATE: 4/2/2018
System Switches Key Operation
The SYSTEM SWITCHES key allows the operator
to turn individual systems ON and OFF. Safety lock-
outs are also reset by selecting the respective system
switch RESET. When the SYSTEM SWITCHES key
is pressed, the following message will appear:
SYSTEM SWITCHES
◄ ►
The display indicates the respective system and it's
ON/OFF /reset switch status. The ▲▼ (ARROW)
keys allow scrolling to the next and previous system
switch (System 1 and 2).
SYSTEM SWITCHES
◄ ►
QUANTECH

SYSTEM SWITCHES KEY

SYS 1 ON / OFF / RESET
=XXXXXXXXXXXXXXX
SYS 2 ON / OFF / RESET
=XXXXXXXXXXXXXXX
The ◄ (LEFT ARROW) or ► (RIGHT ARROW)
keys allow scrolling through the choices of:
• SYSTEM OFF (default)
• SYSTEM ON
• RESET (LOCKOUT)
The switch selection is accepted into memory by press-
ing the  (ENTER) key. When the "RESET" selection
is made and accepted, it will not change the position of
the switch (either ON or OFF).
Whenever possible, except in emergen-
cies, always use the associated system
switch to turn off a compressor, which
allows the compressors to go through
a controlled shutdown. Avoid using
the "UNIT" switch to turn off the
compressors.
SECTION 8 - MICROPANEL
SYSTEM
SWITCHES
KEY
LD21850
147
8

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