Fmc Board Pin Out - Friedrich VRP12K Service And Parts Manual

Fmc Board Pin Out

ID Coil – Heat Cond.
Comp Disch.
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).
139
COMPONENTS TESTING
Ret Air IC Coil Inlet
Comp. Suct.
Heat Liq.
Figure 618 (FMC Board)
Supply Air
Cool Liq. OD Coil OD Amb.
12V
GND
RS485 - Y
RS485 - Z
12V
GND
RS485 - A
RS485 - B
12V
RS232 - TX
RS232 - RX
GND