FORM 150.66-NM3
ISSUE DATE: 09/25/2020
101
JOHNSON CONTROLS
SECTION 7 - UNIT CONTROLS
7
STATUS KEY
Unit Status
Pressing the STATUS key will enable the operator to
determine current chiller operating status. The messag-
es displayed will include running status, cooling de-
mand, fault status, external cycling device status. The
display will be a single message relating to the highest
priority message as determined by the microprocessor.
Status messages fall into the categories of General Sta-
tus and Fault Status.
The following General, Safety, and Warning messages
are displayed when the Status key is pressed. Follow-
ing each displayed message is an explanation pertain-
ing to that particular message.
General Status Messages
In the case of messages which apply to individual sys-
tems, SYS 1 and SYS 2 messages will both be displayed
and may be different. In the case of single system units,
all SYS 2 messages will be blank.
U N I T S W I T C H O F F
S H
U T D
O
W
N
This message informs the operator that the UNIT switch
on the control panel is in the OFF position which will
not allow the unit to run.
R E M O T E C O N T R O L L E D
S H
U T D
O
W
N
The REMOTE CONTROLLED SHUTDOWN mes-
sage indicates that either an ISN system or RCC has
turned the unit “OFF”, not allowing it to run.
D A I L Y S C H E D U L E
S H
U T D
O
W
N
The DAILY SCHEDULE SHUTDOWN message in-
dicates that the daily/holiday schedule programmed is
keeping the unit from running.
F L O W S W I T C H / R E M S T O P
N O R U N P E R M
NO RUN PERM shows that either the flow switch is
open or a remote start/stop contact is open in series
with the flow switch. A 3-second delay is built into the
software to prevent nuisance shutdowns due to errone-
ous signals on the run permissive input.
S Y S 1 S Y S S W I T C H O F F
S Y S 2 S Y S S W I T C H O F F
SYS SWITCH OFF tells that the system switch under
OPTIONS is turned “OFF”. The system will not be al-
lowed to run until the switch is turned back on.
00066VIP
Summary of Contents for YCAL Series
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