OMM 1087 AGZ 025D through 190D 15
Table 12, Digital Outputs
Description Output Off Output On
DO1 Evaporator Water Pump 1 Pump Off Pump On
DO2 Alarm Indicator Alarm Not Active Alarm Active
DO3 Circuit 1 Fan Output 1 Fan(s) Off Fan(s) On
DO4 Circuit 1 Fan Output 2 Fan(s) Off Fan(s) On
DO5 Circuit 1 Fan Output 3 Fan(s) Off Fan(s) On
DO6 Circuit 1 Fan Output 4 Fan(s) Off Fan(s) On
DO7 Circuit 2 Fan Output 1 Fan(s) Off Fan(s) On
DO8 Circuit 2 Fan Output 2 Fan(s) Off Fan(s) On
DO9 Circuit 2 Fan Output 3 Fan(s) Off Fan(s) On
DO10 Circuit 2 Fan Output 4 Fan(s) Off Fan(s) On
Compressor Module 1
Analog Inputs
Description Signal Type Expected Range
X1 Circuit 1 Suction Temperature NTC 10k 340 to 300k Ω
X2 Circuit 1 Evaporator Pressure Voltage 0.4 to 4.6 volts
X4 Circuit 1 Condenser Pressure Voltage 0.4 to 4.6 volts
Digital Inputs
Description Signal Off Signal On
X6 Circuit 1 Switch Circuit Disable Circuit Enable
X7 Circuit 1 MHP Switch Fault No fault
X8 Circuit 1 Motor Protection Fault No fault
DI1 Circuit 1 (or Unit) PVM/GFP Fault No fault
Digital Outputs
Description Output Off Output On
DO1 Compressor #1 Compressor Off Compressor On
DO2 Compressor #3 Compressor Off Compressor On
DO3 Compressor #5 Compressor Off Compressor On
DO4 Evaporator Water Pump 2 Pump Off Pump On
DO5 Circuit 1 Hot Gas Bypass SV Solenoid Closed Solenoid Open
DO6 Circuit 1 Liquid Line SV Solenoid Closed Solenoid Open
Compressor Module 2
Analog Inputs
Description Signal Type Expected Range
X1 Circuit 2 Suction Temperature NTC 10k 340 to 300k Ω
X2 Circuit 2 Evaporator Pressure Voltage 0.4 to 4.6 volts
X4 Circuit 2 Condenser Pressure Voltage 0.4 to 4.6 volts
Digital Inputs
Description Signal Off Signal On
X6 Circuit 2 Switch Circuit Disable Circuit Enable
X7 Circuit 2 MHP Switch Fault No fault
X8 Circuit 2 Motor Protection Fault No fault
DI1 Circuit 2 PVM/GFP Fault No fault
Note: The Motor Protection and MHP input signal are wired in series. If Motor Protection input is
open, MHP Switch input will also be open.
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