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2104349 rev. AD
2) Replace the battery with a known good battery using the Battery Pack
Installation procedure in Chapter 2.
3) Reconnect power to the charger regulator. If the battery pack is charged
through an AC charger, move to step 5; otherwise, continue to step 4.
4) Measure the charging voltage from the solar panel at the charger regulator.
Use a DMM that connects the (+) and (-) leads to the (+) and (-) solar panel
wires. Loaded voltage should be greater than or equal to the specifications
listed in Table 5
–2. If the voltage is within range, the battery was bad.
If the loaded voltage is not above the minimum, perform the Solar Panel
Troubleshooting Test found within this chapter.
5) If the unit receives charging voltage from the AC charger, perform the AC
Charger Troubleshooting Test found within this chapter.
Table 5
–2 Specifications for solar panels
Panel
Max
Volts @ PMax
Open Circuit
Load Resistance
Loaded Voltage
5
4.5W
16.5V
20.5V
50 Ω 25W
13.5V
10
10W
16.8V
21V
30 Ω 25W
17.5V
20
20W
16.8V
21V
15 Ω 25W
17.8V
30
30W
16.8V
21V
10 Ω 40W
17.8V
5.3.4 Solar panel charging system test
If the system setup includes a solar panel charger connected to the 6270 Optional
Equipment Unit (OEU) and is not supplying the required voltage and current to the
G4 EX unit, the user may need to test the solar panel.
The following instructions contain the steps required to test the solar panel.
5.3.4.1
Required equipment
-
Digital Multi-meter with 0-20 VDC range
-
Required resistors for testing specific panels as listed in Table 5
In continuous low sunlight conditions, the unit may not
supply the required voltage. The solar panel should be
positioned so that it receives the most sunlight. Do not place
in a shaded area.
5.3.4.2
Step-by-step instructions
1) Measure the solar panel voltage at the charger regulator. Use a DMM
connecting the (+) and (-) leads to the (+) and (-) solar panel wires. Loaded
voltage should be greater than or equal to the specification listed in Table
5
–2. If the solar panel is not above the minimum, replace the solar panel,
and continue to step 2.
2) Check the solar panel angle and direction. In the northern hemisphere, the
panel should face due south. In southern hemispheres, the panel should
face due north.
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