FORM 150.72-NM1 (1020)
127
JOHNSON CONTROLS
7
STATUS KEY
Unit Status
Pressing the STATUS key will enable the operator to
determine current chiller operating status. The messages
displayed will include running status, cooling demand,
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 Status and
Fault Status.
The following General, Safety, and Warning messages
are displayed when the STATUS key is pressed.
Following each displayed message is an explanation
pertaining to that particular message.
General Status Messages
In the case of messages which apply to individual
systems, 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.
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.
The REMOTE CONTROLLED SHUTDOWN message
indicates that either an ISN system or RCC has turned
the unit “OFF”, not allowing it to run.
U N I T S W I T C H O F F
S H
U T D
O
W
N
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 DAILY SCHEDULE SHUTDOWN message
indicates that the daily/holiday schedule programmed
is keeping the unit from running.
REMOTE STOP NO RUN PERM shows that a remote
start/stop contact is open in series with the flow switch.
These contacts are connected to Terminals 51 and 13 of
XTBC1. A 3-second delay is built into the software to
prevent nuisance shutdowns due to erroneous signals
on the run permissive input.
FLOW SWITCH OPEN indicates the flow switch
contacts connected to Terminals 13 and 14 of XTBC1
are open. A 3-second delay is built into software to
prevent nuisance shutdowns due to erroneous signals
from the flow switch.
SYS SWITCH OFF tells that the system switch under
OPTIONS is turned “OFF”. The system will not be
allowed to run until the switch is turned back on.
D A I L Y S C H E D U L E
S H
U T D
O
W
N
R E M O T E S T O P
N O R U N P E R M
F L O W S W I T C H
O P E N
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
00066VIP
Summary of Contents for YORK Tempo YLAA Series
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