Friedrich VRP Series Service & Parts Manual

100 PB
COMPONENTS TESTING
Fmc Board Pin Out
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).
Figure 616 (FMC Board)
ID Coil
Heat Cond
Return
Air
IC Coil
Inlet
Supply
Air
Wall Controller
12v
GND
RS485 - Y
RS485 - Z
12V
GND
RS485 -A
RS485 - B
EEV
12V
RS232 - TX
RS232 - RX
GND
RS 485
Board
Heater
Board
Reheat Relay Power
Low Pressure Switch
High pressure Switch
Compressor
Discharge
Compressor
Suction
Heat
Liquid
Cool
Liquid
Outdoor
Coil
Outdoor
Ambient

Friedrich VRP Series Specifications

General

Brand	Friedrich
Model	VRP Series
Category	Heat Pump
Language	English