Vent Blower Power Circuit Check; Starting Power Circuit (Heater) - Piper PA-44-180 SEMINOLE Maintenance Manual

VENT BLOWER POWER CIRCUIT CHECK.

1. With the HEATER SWITCH in the FAN position, voltage (14 volts nominal) should be present at the
following locations: (Refer to Figure 21-8)
A. Terminal No. 6 on the heater terminal strip if the air valve is open.
B. From terminal No. 6 of the heater terminal strip through the radio noise filter to the ventilating air
motor.
C. Electrical ground circuit for the ventilating air motor is provided from terminal No. 5 of the heater
terminal strip. Ventilating air motor is inoperative when the landing gear is up or air valve is closed.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
Figure 21-9. Starting Power Circuit
1F10
NOTE
THIS WIRING DIAGRAM IS FOR REFERENCE
PURPOSES ONLY. REFER TO CHAPTER 91 FOR
AIRCRAFT WIRING.
2 1 - 4 3 - 0 7
Page 21-19
Revised: May 15, 1989