Johnson Controls LSWU User Manual

JOHNSON CONTROLS
200
FORM 145.05-NOM7
ISSUE DATE: 10/31/2019
SECTION 8 – SERVICE
mation is displayed is also contained in the table. Ad-
ditional information for each of the faults is contained
under their respective section of Section 5, Sequence
of Operation of this IOM.
When a fault is declared, the Unit Controller records
the time of occurrence, the date of occurrence, and a
complete unit snapshot at the time of each occurrence
in the HISTORY buffer. This data can be retrieved us-
ing the HISTORY key of the User Interface.
The HISTORY buffer stores the data from the last ten
faults from the most recent (HISTORY 01) to the old-
est (HISTORY 10). No fault HISTORY is eliminated
once recorded other than being “pushed off” of the end
of the list by a new fault when the buffer becomes full.
Warnings are only displayed in the HISTORY buffer
while they are active. When the problem that generated
the WARNING is corrected the record is removed from
the buffer. The Unit Controller does not record the time
of occurrence, the date of occurrence, or a complete unit
snapshot at the time of occurrence for a WARNING.
The HISTORY buffer is password protected and a Lev-
el 2 password must be entered in order to view the data.
When the HISTORY key is pressed, the password
prompt appears. After the proper Level 2 password has
been entered the screen shows the first active warning.
If there are no active warnings present, the first fault is
displayed. If there are no faults in the HISTORY buf-
fer, the screen displays “NO FAULT.” See SECTION
6 – USER INTERFACE CONTROL CENTER of this
manual for additional information on how to navigate
through the HISTORY menu.
In addition to the items listed in Table 53 on page 209
the following items listed below are contained under
the HISTORY key.
“COMPRESSOR SYSTEM (1, 2, OR 3) CLEAR” -
Whenever there is a compressor safety trip the Unit
Controller initiates the “COMPR STATUS CLEAR
TIME” (A, B, C, D, E, OR F) timer. The Unit Control-
ler records the time it takes for the trip to clear. When
the fault clears “COMPRESSOR SYSTEM (A, B, C,
D, E, OR F) CLEAR” shows the time it took for the
fault to clear in the HISTORY buffer.
“COMPRESSOR SYSTEM (A, B, C, D, E, OR F)
TIME OUT” – If the “COMPR STATUS CLEAR
TIME (A, B, C, D, E, OR F) timer reaches 60 minutes
a “COMPRESSOR SYSTEM (A, B, C, D, E, OR F)
TIME OUT” is indicated in the HISTORY buffer. The
STATUS key displays the message “COMP SYS (A, B,
C, D, E, OR F) STATUS” “SAFETY LOCKOUT.” The
Unit Controller locks out the corresponding compres-
sor system when a “COMPRESSOR SYSTEM (A, B,
C, D, E, OR F) TIME OUT” is declared.
“COMPR SYSTEM (A, B, C, D, E, OR F) INHIBIT”
– This WARNING indicates the compressor system
safety circuit experienced a trip but reset prior to the
exploration of the 60 minute reset time function. If the
safety circuit does not reset in 60 minutes it is replaced
with a “COMPRESSOR SYSTEM (A, B, C, D, E, OR
F) TIME OUT” message.

Johnson Controls LSWU Specifications

General

Brand	Johnson Controls
Model	LSWU
Category	Chiller
Language	English