FORM 150.66-NM3
ISSUE DATE: 09/25/2020
147
JOHNSON CONTROLS
SECTION 9 - SERVICE AND TROUBLESHOOTING
9
CONTROL INPUTS/OUTPUTS
Tables 26 through 29 are a quick reference list provid-
ing the connection points and a description of the in-
puts and outputs respectively. All input and output con-
nections pertain to the connections at the microboard.
TABLE 26 – MICROBOARD DIGITAL INPUTS
J13‑2 Unit Switch
J13‑3 Load Limit Stage 2 (3, 5 & 6 comp units)
J13‑4 Load Limit Stage 1
J13‑5 Flow Switch and Remote Start / Stop
J13‑6
Spare (Sys 2 Zone Thermostat - SP Control
Only) (Mode Selection, Cooling = 0, Heating = 1,
HP only)
J13‑7
Single System Select (Jumper = Single Sys, No
Jumper = Two Sys)
J13‑8 CR1 (Sys 1 MP/HPCO)
J13‑10 CR2 (Sys 2 MP/HPCO)
J13‑9 Spare
J13‑11 Spare
TABLE 27 – MICROBOARD DIGITAL OUTPUTS
TB7-2 Sys 1 Compressor 1
TB7-3
Sys 1 Liquid Line Solenoid Valve
Sys 1 Mode Solenoid Valve (HP only)
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
Sys 2 Mode Solenoid Valve (HP Only)
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
TB8-4 Evaporator Pump Starter 2
TB8-5 Spare
TB8-9 Spare
TB9-4 Bivalent Heat Step (HP only)
TABLE 28 – MICROBOARD ANALOG INPUTS
J7‑10
Sys 1 Suction Pressure Transducer
or
Sys 1 Low Pressure Switch
J11‑12 Unit Type Select: Chiller, Cond Unit, Heatpump
J7‑11 Sys 1 Discharge Pressure Transducer (Optional)
J11‑11 Remote Temperature Reset
J8‑7
Sys 1 Suction Temp Sensor (Non-MMHP Cond
Unit - Optional)
Sys 1 Discharge Temp Sensor (R-410A - Op-
tional)
J10‑7
Sys 2 Suction Temp Sensor (Non-MMHP Cond
Unit - Optional)
Sys 2 Discharge Temp Sensor (R-410A - Op-
tional)
J8‑8
Sys 1 Suction Temp Sensor (EEV Option &
MMHP Cond Unit)
J10‑8
Sys 2 Suction Temp Sensor (EEV Option &
MMHP Cond Unit)
J6‑9 Ambient Air Temp Sensor
J6‑7 Leaving Chilled Liquid Temp Sensor
J6‑8
Return Chilled Liquid Temp Sensor / Discharge
Air Temp Sensor
J9‑10
Sys 2 Suction Pressure Transducer
or
Sys 2 Low Pressure Switch
J11‑13
J9‑11 Sys 2 Discharge Pressure Transducer (Optional)
J7‑12 Unit/Sys 1 Voltage
J9‑12 Sys 2 Voltage
J11‑14 Evap Pump 1 Trip Input
J11‑15 Evap Pump 2 Trip Input
J8‑9 Spare
J10‑9 Spare
J12‑9 Spare
J12‑10 Spare
J12‑11 Spare
J12‑12 Spare
TABLE 29 – MICROBOARD ANALOG OUTPUTS
TB5-1 & 2 Sys 1 EEV Output
TB6-1 & 2 Sys 2 EEV Output
J15‑3, 7 Spare
J15‑4 ,8 Spare
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