JOHNSON CONTROLS
240
FORM 201.23-NM2
ISSUE DATE: 09/25/2020
SECTION 8 - MICROPANEL
STATUS KEY
LD10605
STATUS
KEY
Status Key Operation
The STATUS key displays the current chiller or system
operational status. The messages displayed include
running status, cooling demand, system faults, unit
faults, VSD faults, unit warnings, external device sta-
tus, load limiting, anti-recycle timer, status of unit/sys-
tem switches, and a number of other messages. Press-
ing the STATUS key will enable the operator to view
the current status of the chiller. The display will show
one message relating to the “highest priority” informa-
tion as determined by the microprocessor. The STA-
TUS key must be pressed twice to view both System
1/2 and System 3/4 data. There are three types of status
data, which may appear on the display:
• General Status messages
• Unit Safeties
• System Safeties.
When power is first applied to the control panel, the
following message displaying YORK International
Corporation, the EPROM version, date, and time will
be displayed for 2 seconds, followed by the appropriate
general status message:
(C)2004 YORK INTERNATIONAL CORPORATION
C.XXX.XX.XX 18-SEPT-2005 12:45: AM
Unit status messages occupy 2 lines of the Status mes-
sage display. If no unit status message applies, individ-
ual status messages for each system will be displayed.
On 3 and 4 compressor units, the STATUS key must be
pressed twice to display the status of all systems.
Any time the STATUS key is pressed or after the
EPROM message disappears at power-up, a status dis-
play indicating chiller or system status will appear.
Multiple STATUS messages may appear and can be
viewed by pressing the STATUS key repeatedly to al-
low scrolling through as many as three STATUS mes-
sages, that could possibly be displayed at any time on
a 2 compressor chiller or 4 messages that could be dis-
played on a 3 or 4 compressor chiller.
Examples of the typical Status messages are shown in
the next topic
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