Fmc Board Pin Out - Friedrich VRP Series Service & Parts Manual

Fmc Board Pin Out

ID Coil
Heat Cond
Compressor
Discharge
1. Check for 12 v to ground 3 places.
2. Check for 3.3 volts across thermistor pins.
3. Check resistance of thermistors (10 places). Refer to thermistor values (Figure 630).
100
COMPONENTS TESTING
Return IC Coil
Air Inlet
Compressor
Heat
Suction
Liquid
Supply
Wall Controller
Air
Cool
Outdoor
Liquid
Coil
Figure 616 (FMC Board)
12v
GND
RS 485
RS485 - Y
Board
RS485 - Z
12V
GND
RS485 -A
RS485 - B
EEV
12V
RS232 - TX
Heater
Board
RS232 - RX
GND
Reheat Relay Power
Low Pressure Switch
High pressure Switch
Outdoor
Ambient