Control Inputs/Outputs; Table 25 - I/O Digital Inputs; Table 26 - I/O Digital Outputs; Table 27 - I/O Analog Inputs - York YLAA Series Installation Operation & Maintenance

FORM 150.72-ICOM6
ISSUE DATE: 12/29/2017
F L O W S W / R E M
J 13 - 5
This indicates that the flow switch/remote start input is
connected to plug 13- pin 5 (J13-5) on the microboard,
and is ON (ON = +30VDC unregulated input, OFF =
0VDC input on digital inputs).

CONTROL INPUTS/OUTPUTS

Table 25 through Table 28 on page 163 are a quick
reference list providing the connection points and a
description of the inputs and outputs respectively. All
input and output connections pertain to the connections
at the microboard.

TABLE 25 - I/O DIGITAL INPUTS

J13-2 Unit ON/OFF Switch
J13-3
Load Limit Stage 2 on 3, 5 & 6 Comp. Units
J13-4 Load Limit Stage 1
J13-5 Flow Switch and Remote Start/Stop
J13-6 Spare
Single System Select
J13-7
(Jumper = Single Sys, No Jumper = Two Sys)
CR1
J13-8
(Sys 1 Motor Protector/High Pressure Cutout)
CR2
J13-10
(Sys 2 Motor Protector/High Pressure Cutout)

TABLE 26 - I/O DIGITAL OUTPUTS

TB7-2 SYS 1 Compressor 1
TB7-3
SYS 1 Liquid Line Solenoid Valve
TB7-4 SYS 1 Compressor 2
TB7-5 SYS 1 Compressor 3
TB7-7 SYS 1 Hot Gas Bypass Valve
TB10-2 SYS 2 Compressor 1
TB10-3
SYS 2 Liquid Line Solenoid Valve
TB10-4 SYS 2 Compressor 2
TB10-5 SYS 2 Compressor 3
TB7-8 SYS 1 Condenser Fan Output 1
TB7-9 SYS 1 Condenser Fan Output 2
TB7-10 SYS 1 Condenser Fan Output 3
TB10-8 SYS 2 Condenser Fan Output 1
TB10-9
SYS 2 Condenser Fan Output 2
TB10-10 SYS 2 Condenser Fan Output 3
TB8-2 Evaporator Heater
TB8-3 SYS 1 Alarm
TB9-2 SYS 2 Alarm
TB8-6 & 7 Evaporator Pump Starter
TB10-7 SYS 2 Hot Gas Bypass Valve
JOHNSON CONTROLS
S T A R T
I S O N
SECTION 9 – SERVICE AND TROUBLESHOOTING

TABLE 27 - I/O ANALOG INPUTS

SYS 1 Suction Transducer
J7-10
-or-
SYS 1 Low Pressure Switch
Unit Type: Chiller = NO Jumper J11-12 to +24
VDC
J11-12
YCUL Condensing Unit = Jumper J11-12 to +24
VDC (Do NOT Use)
J7-11 SYS 1 Discharge Pressure Transducer (Optional)
J6-9 Ambient Air Temp. Sensor
J6-7 Leaving Chilled Liquid Temp. Sensor
J6-8 Return Chilled Liquid Temp. Sensor
SYS 2 Suction Pressure Transducer
J9-10 -or-
SYS 2 Low Pressure Switch
SYS 2 Discharge Pressure Transducer
J9-11
(Optional)
J7-12 Unit/SYS 1 Voltage
J9-12 SYS 2 Voltage
J11-11 Remote Temperature Reset

TABLE 28 - I/O ANALOG OUTPUTS

N/A Not Applicable
9
163