Instrument Panel Fans Operational Check; Standby Battery Periodic Checks; Table 4-14, Standby Battery Required Equipment - Garmin G1000 Nxi System Maintenance Manual

Instrument Panel Fans Operational Check

This procedure will verify that airflow is present from the PFD1, MFD and PFD2 cooling fans.
The fan speed monitoring circuits and annunciations are checked by the G1000 Cooling Fan
Fail Annunciation Check in Section 9.4. This check requires the G1000 to be powered on.
1. Remove PFD1 as described
2. Identify the PFD1 cooling fan and verify airflow is present.
3. Reinstall PFD1 as described in Section 6.1, steps 2 through 4 (Reinstallation).
4. Repeat Steps 1 through 3 for the MFD and PFD2.
5. The Instrument Panel Fans Operational Check is complete.

Standby Battery Periodic Checks

Charge Check
Refer to the PS-835 Emergency Power Supply Installation Manual listed in Table 1-1.
With the PS-835 battery installed in the aircraft, connect 28VDC ground power to the aircraft.
Turn the ground power and aircraft power on, then verify all four Battery Voltage LEDs are lit to
indicate the battery is being charged (see Figure 4-5
With the PS-835 battery installed in the aircraft and no ground or aircraft power on, press the
TEST SWITCH (Figure 4-5, Item 4) into TEST position for 5 seconds. The PS-835 indicates
that it is adequately charged when the VOLTAGE LEVEL 24Vdc LED (Figure 4-5, Item 2)
illuminates momentarily, AND the 20Vdc LED (Figure 4-5, Item 6) remains lit during the test. If
the VOLTAGE LEVEL 24Vdc LED does not, at least momentarily, illuminate while the 20Vdc
LED is illuminated, perform the Section 4.16.3 Cell Isolation Test because the battery is
incapable of providing adequate power.

Table 4-14, Standby Battery Required Equipment

DESCRIPTION
Power Supply
Load Resistor
Stopwatch
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
n Section 6.1, steps 1 and 2 (Removal).
i
DVM
).
VENDOR/SPECIFICATION
0-30 VDC, 20A capacity
Fluke Model 8050A
7Ω +/- 1% 250 watt
Capable of measuring to the minute
Page 132
Revision 1