Status" Key; Unit Status; General Status Messages - York YLAA0285SE Manual

FORM 150.72-NM3 (1020)
ISSUE DATE 10/05/2020

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 board.
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.
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.
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 message
indicates that either an ISN system or RCC has turned
the unit "OFF", not allowing it to run.
JOHNSON CONTROLS

"STATUS" KEY

The DAILY SCHEDULE SHUTDOWN message
indicates that the daily/holiday schedule program is
preventing 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 & 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.
O F F
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.
S Y S
S Y S
SYS SWITCH OFF indicates that the system switch
under OPTIONS is turned "OFF". The system will not
be allowed to run until the switch is turned back on.
SECTION 7 – UNIT CONTROLS
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
1 S Y S S W I T C H
2 S Y S S W I T C H
00066VIP
7
O F F
O F F
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