Heater Board Pin Out - Friedrich VRP12K Service And Parts Manual

Heater Board Pin Out

1. Check for 12 volts between VCC 1 and ground.
2.Check for line voltage at L1 and L2, reversing valve L1 and L2,
3.Check voltage at SSR + an ‑ for 12 vdc.
141
COMPONENTS TESTING
12V RS232-RX RS232-TX
SSR+
Figure 620 (Heater Board)
GND
SSR‑
L1
RV L1
RV L2
L2
Heater Relays