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. Configured at the time
the board is manufactured and should not re-
quire field configuration.
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
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. Configured at the time
the board is manufactured and should not re-
quire field configuration.
Pins 1-2:
Type 65548.
Pins 2-3:
Type 65550.
PROGRAM SWITCHES
SW1
1 -
Not Used.
2 -
Oil Pump style - Configures Program opera
-
tion for either Variable Speed Drive oil pump
or fixed 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 fixed speed oil pump.
ON:
(Style D/E/F) Variable Speed Oil Pump -
Configures 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-
figures the program to operate the fixed 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
five times. On the fifth 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.
