44
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 3 - MICROBOARD 031-01730-000
JCI COMPANY CONFIDENTIAL JOHNSON CONTROLS
JP40 - Not used.
JP43, JP44 – Display Controller (U29) type (rev E
(and later) boards only)). Must be positioned
according to the Display Controller type in-
stalledonMicroboard.Conguredatthetime
the board is manufactured and should not re-
quireeldconguration.
Pins 1-2: Type 65548.
Pins 2-3: Type 65550 .
JP41, JP42 - High Speed Thrust Bearing Proxim-
ity probe type (Not applicable to P compres-
sors and Style F (and later) chillers with G,
Q and H5-8 compressors)). See SECTION 15
- PROXIMITY PROBE to determine which
probe is present.
IN: Not Used.
OUT: +24 VDC Probe, part number
025-30961-000 or 025-35900-000.
JP43, JP44 - Display Controller (U29) type (rev E
(and later) boards only)). Must be positioned
according to the Display Controller type in-
stalledonMicroboard.Conguredatthetime
the board is manufactured and should not re-
quireeldconguration.
Pins 1-2: Type 65548.
Pins 2-3: Type 65550.
PROGRAM SWITCHES
SW1
1 - Not Used.
2 - Oil Pump style - Congures Program opera-
tion for either Variable Speed Drive oil pump
orxedspeedoilpump.Chillersequippedwith
the variable speed oil pump have a Program
controlled Oil Heater and a different comple-
ment of solenoid valves than chillers equipped
withaxedspeedoilpump.
ON: (Style D/E/F) Variable Speed Oil Pump -
Congurestheprogramtooperatetheoilpump
VSD, the oil heater and the following Solenoid
Valves: Oil Return and Liquid Line (J compres-
sors only) connected in parallel to TB 1-6 1.
OFF: (Style C) Fixed Speed Oil Pump - Con-
gurestheprogramtooperatethexedspeed
oil pump and the following solenoid valves:
TB1-34 Liquid Line, TB1-61 Oil Return and
Vent Line connected in parallel, TB1-62 High
Speed Thrust.
3 - Prerun - Determines the duration of the system
pre-lube period.
ON: Extended prerun system pre-lube period is
180 seconds in duration. Oil pump runs for 167
seconds.
OFF: Standard prerun. system pre-lube period
is 50 seconds in duration. Oil pump runs for 37
seconds.
4 - Diagnostics - Enables or disables software di-
agnostics.
ON: Enables software diagnostics. Disables
normal chiller operation.
OFF: Disables software diagnostics. Enables
normal chiller operation.
5 - Auto-restart - Determines the course of action
required to restart the chiller, if a power failure
occurs while the chiller is running.
ON: Chiller will automatically restart when
power is restored.
OFF: Requires a manual reset after power is
restored. The chiller will not start until the op-
erator moves the START-RUN-STOP/RESET
rocker switch to the STOP/RESET position. If
in local mode, the chiller can be restarted by
initiating a local start. If in remote mode, the
chiller will restart upon receipt of a remote start
signal .
6 - Anti-recycle - Enables or disables the anti-re-
cycle timer.
The anti-recycle timer must never be dis-
abled unless it is absolutely necessary to
do so during troubleshooting.
ON: Enables anti-recycle timer. solid state
starter and electro-mechanical starter applica-
tions - Chiller cannot be started at intervals
shorter than once every 30 minutes. VSD ap-
plications (JP37 Out) – Chiller can be started
at the completion of system coastdown at inter-
vals shorter than once every 10 minutes up to
vetimes.Onthefthshutdown,a10-minute
timer is started and restart is inhibited until the
timer has elapsed.
OFF: Disables anti-recycle timer. Chiller
can be started at the completion of System
Coastdown, regardless of how long the chiller
had been running.
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