Appendix A: Control Board Description - Maritime Geothermal Nordic PC Series Installation And Service Manual

Appendix A - GEN2 Control Board Description
The picture below shows the locations of the connectors and LED indicators of the control board. The control board offers many fea-
tures such as short circuit protection on all digital outputs, Real Time Clock with super capacitor for backup power, WiFi capability,
relay outputs for plenum heater control (if equipped), USB port, PIC32 microcontroller, etc.
High Low
Pressure1
Pressure1
Sensor
Sensor
Connector
Connector
High Low
Pressure1 Pressure1
Fault Fault
Indicator
Indicator
BACnet
Outputs
MS/TP
Connector
LCD
Short
Display
Circuit
Connector
Protectors
ISSUE 03: 1-Oct-2021
Suction Line1 Suction Line2
Temperature Temperature
Probe
Connector Connector
Local
Remote
(Indoor)
(Outdoor)
EEV1
EEV2
Connector Connector
Digital
Heartbeat
(flashes once
per second)
24VAC
Power
Indicator
High
Pressure2
Probe
Sensor
Connector
High Low
Pressure2
Pressure2
Fault
Fault
Indicator Indicator
Analog 5VCD 12VDC 24VDC
Inputs
AI0 to AI5
Power supplies for
USB
external sensors
Connector
for use with
Analog Inputs
AI0 to AI5
Page 84
Temperature
Low
Pressure2
Calibration
Sensor
Connector
Connector
Outdoor
Temperature
Probe
Connector
WiFi
power indicators Connector
MODBUS
MS/TP
Connector
Auto
Temperature Connectors
INDOOR OUTDOOR
IN OUT IN OUT
Plenum
Heat
Airflow
Reduction
Fault
Indicator
002291MAN-03