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SECTION 36 - SOFTWARE ENHANCEMENTS
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS
JCI COMPANY CONFIDENTIAL
36
GENERAL
Beginning May 2004, enhanced software will be sup-
plied in all new production YK chillers. It is backward
compatible to all previous YK chillers. The enhance-
ments are outlined below.
Microboard versions and part numbers are 031-01730-
000:
• NEMA 1-4 chillers
C.MLM.01.11.108 (p/n 031-01797-001)
• CE chillers
C.MLM.01.11.209 (p/n 031-01797-002)
The version and part number for 031-02430-000 mi-
croboards for both NEMA 1-4 and CE Chillers is
C.OPT.01.11.303 (p/n 031-02474-001).
HIGH CONDENSER PRESSURE FAULT
WHILE SHUTDOWN
High temperature condenser water flowing through the
condenser while the chiller is shutdown can cause a
condenser high pressure condition resulting in loss of
refrigerant. Therefore, an anticipatory safety fault was
created to annunciate condenser high pressure condi-
tions when the chiller is stopped. While the chiller is
stopped, if the condenser pressure exceeds 160.0 psig
(R-134a), 240.0 psig (R22), a safety fault occurs and
CONDENSER – HIGH PRESSURE - STOPPED is
displayed.
The chiller can be started after the condenser pressure de-
creases to less than 160.0 psig (R-134a), 240.0 psig (R22)
and a special reset procedure is performed as follows:
1. Place the COMPRESSOR switch in the STOP-
RESET position.
2. At the keypad, login at SERVICE access level us-
ing code 1 3 8 0.
3. Select COMPRESSOR screen.
4. Press the FAULT ACKNOWLEDGE key on the
COMPRESSOR screen. A dialog box displays
ENTER PASSWORD TO CLEAR FAULT.
5. Enter 1 3 9 7 and press the
key ().
SI0089 - SOFTWARE ENHANCEMENTS EFFECTIVE MAY 2004
This anticipatory fault is only performed while the
chiller is stopped. If a CONDENSER – HIGH PRES-
SURE fault is detected while the chiller is in pre-lube,
system run or coastdown, the fault is handled in the
normal way and does not require the special reset pro-
cedure.
STYLE B SOLID STATE STARTER FAULTS
The following changes apply to faults detected by the
Style B Liquid Cooled Solid State Starter (LCSSS).
Open SCR (Silicon Controlled Rectifier) Fault
When the solid state starter initiates a shutdown, the
fault data transferred to the OptiView Control Center
is a function of the EPROM (U16) in the starter logic/
trigger board.
Previously, in starters equipped with EPROM version
C.SSS.01.00 through C.SSS.01.02, when an open SCR
fault occurred, the fault data returned from the starter
did not identify the phase in which the fault occurred.
Therefore, the message displayed by the OptiView
Control Center was LCSSS – OPEN SCR. New ver-
sion C.SSS.01.03 EPROM now supplied in the starter
logic/trigger board, returns fault data that identifies the
phase in which the open SCR condition is detected.
This flash memory card version interprets this fault
data and displays a message that identifies the defective
phase. Therefore, when this flash memory card version
is used with a starter logic/trigger board equipped with
version C.SSS.01.03 (and later) EPROM, LCSSS –
PHASE X OPEN SCR (X is replaced by A, B or C as
appropriate) is displayed when the fault occurs.
Start Inhibit Faults
The following start inhibit faults are no longer logged
on the HISTORY screen. They will continue to be dis-
played on the system details line of the display and
transferred to the E-Link Gateway.
LCSSS – PHASE X HEATSINK
TEMPERATURE – STOPPED (X is replaced by
A, B or C as appropriate)
Diagnostics Screen
The communications error counters now count up to
65535 (was 255).
