Lennox MPB012S4S

115
Error Code: E8 (continued)
DC fan motor(control chip is inside fan motor)
Poweronandwhiletheunitisinstandby,measurethevoltagebetweenpin1-pin3,pin4-pin3atfanmotorconnector.
Ifthevalueofthevoltageisnotintherangeshowninbelowtable,thePCBfaultyandshouldbereplaced.
Table 11. DC Motor Voltage Input and Output
No. Color Signal Voltage
1 Red Vs/Vm 200~380V
2 --- --- ---
3 Black GND 0V
4 White Vcc 13.5~16.5V
5 Yellow Vsp 0~6.5V
6 Blue FG 13.5~16.5V
Vs
Vcc
Vsp
FG