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FORM 150.66-NM3
ISSUE DATE: 09/25/2020
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
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.
JOHNSON CONTROLS
STATUS KEY
The REMOTE CONTROLLED SHUTDOWN mes-
sage indicates that either an ISN system or RCC has
turned the unit "OFF", not allowing it to run.
The DAILY SCHEDULE SHUTDOWN message in-
dicates that the daily/holiday schedule programmed is
keeping the unit from running.
F L O W
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
O F F
software to prevent nuisance shutdowns due to errone-
ous signals on the run permissive input.
S Y S
S Y S
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.
SECTION 7 - UNIT CONTROLS
R E M O T E
C O N T R O L L E D
S H U T D O W N
D A I L Y
S C H E D U L E
S H U T D O W N
S W I T C H / R E M
N O
R U N
1
S Y S
S W I T C H
2
S Y S
S W I T C H
00066VIP
7
S T O P
P E R M
O F F
O F F
101
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