Whelen P36P1L User Manual
Page 4
Page 4
WWW.
+14V
GND
.COM
R
Existing
Ground
Wire
Existing
Landing/Taxi Light
Switch
Existing
Aircraft
(+) VDC
Existing
Fuse or
Circuit Breaker
Troubleshooting Procedure: The following information is to provide guidelines for troubleshooting the LED
Light Models listed on page 1.
Note: A circuit feature of the Parmetheus Plus is multiple parallel paths of LEDs and fixed current sources.
For this reason, a group of 3 or 6 LEDs may not be illuminated, while the remainder of the LEDs may be
operating at full intensity. This creates a situation where the light may be producing adequate light to perform
its intended function, but it should still be replaced.
In the case of no light output:
1.
For a new installation, check the polarity of the wire connections. Check that the appropriate part has
been selected for the aircraft.
2.
Check for the correct voltage at the light (+14V / 28V) terminal. Check for ground at the (GND) terminal.
3.
Check the connections at the (+14V / 28V) and (GND) terminals.
4.
Perform a bench check and replace if a failure is confirmed.
Refer to the aircraft manual for additional information.
Wiring Diagram