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FORM 160.54-M1
ISSUE DATE: 10/25/2019
With software version C.OPT.01.23.307 (and later), on
those chiller shutdowns as per above where the contacts
remain closed during shutdown, when a chiller restart
occurs the contacts remain closed into and throughout
the Pre-lube period and the Transducer Auto Zeroing
is not performed. With previous software versions, the
contacts open during the first 13 seconds of the Pre-
lube on the restart and the Auto Zeroing is performed.
K1 - Anticipatory Alarm (TB2-55/56)
Dry closure contacts which close when one of the
warning messages listed below are displayed. On most
warnings, the contacts automatically open when the
warning condition is no longer present. On those warn-
ings marked with an asterisk, the contacts will open
only after the warning condition is no longer pres-
ent and the WARNING RESET key is pressed when
logged in at OPERATOR access level or higher.
• Real Time Clock Failure
• Condenser or Evaporator Transducer Error*
• Refrigerant Level Out of Range
• Standby Lube-Low Oil Pressure*
• Setpoint Override*
• Condenser-High Pressure limit
• Evaporator-Low Pressure Limit
• Vanes Uncalibrated-Fixed Speed
• Harmonic Filter-Operation Inhibited
• Harmonic Filter-Data Loss
• Harmonic Filter-Input Frequency Out Of Range.
The following only applies to Flash memory card ver-
sion C.MLM.01.05.xxx (and later)
• Excess Surge Detected*
• Surge Detected – Excess Surge Limit
K2 - Remote Mode Ready to Start
(only operational in Digital, Analog or
)(TB2-26/27)
Dry closure status contacts that are closed to indicate to
a remote device that the chiller will start upon receipt
of a remote start signal. The contacts open coincident
with any Cycling or Safety shutdown or anytime the
keypad COMPRESSOR switch is placed in the Stop -
Reset (O) position. On cycling shutdowns, the contacts
JOHNSON CONTROLS
will close when the cycling condition clears. On safety
shutdowns, the contacts will close only after the Safety
condition clears. A manual reset is performed by plac-
ing the COMPRESSOR switch in the Stop-Reset (O)
position and then back to the RUN (I) position.
K3 - Safety Shutdown Status (TB2-42/43)
Dry closure status contacts which close coincident
with a safety shutdown. They remain closed until
the safety condition clears and a manual reset is per-
formed by placing the COMPRESSOR switch in the
Stop-Reset(O) position, whereupon they open.
K4 - Cycling Shutdown Status (TB2-40/41)
Dry closure status contacts which close coincident
with a cycling shutdown. They remain closed until the
cycling condition clears, whereupon they open.
K5 - Condenser Motor Pump Starter
(TB2-150/151) (applies to Flash memory card
version C.MLM.01.04.xxx (and later))
Dry closure contacts which close coincident with be-
ginning of System run. They open coincident with the
beginning of System Coastdown with the following
exceptions:
• If equipped with a Mod B solid state starter, the
contacts remain closed at shutdown until all SCR
Heat sink temperatures are less than or equal to
105°F or a maximum of 45 minutes.
• With software version C.OPT.01.23.307 (and
later), while "Condenser – Flow Switch Open"
cycling shutdown is active, the contacts remain
closed until the chiller is given a stop command
or has another fault.
If it is desired to supply the dry contacts with 115 VAC
power from the OptiView Control Panel to control the
Condenser Pump Motor Starter; a field installed wire
must be connected from TB5-22 to I/O Board TB2-
150. Then connect I/O Board TB2-151 to the Condens-
er Pump Motor Starter.
K6-K 9 - Not Used
K10 - Oil Heater (P compressors and all style
"F" (and later) chillers equipped with Flash
memory card version C.MLM.01.07.xxx or
later version)) (TB1-64/17)
Contacts operate the same as K15.
JCI COMPANY CONFIDENTIAL
SECTION 6 - I/O BOARD
6
99
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