TI4200 GPU-24
13
3
Operating Procedures
Check Unit Internal Resistance (Test for Shorts)
Place the negative probe on
1.
the ac ground probe and the
positive probe on the case.
Move the positive probe to
2.
the dc positive post.
Move the positive probe to
3.
the dc negative post.
Check DC Voltage Reading at DC Receptacle Terminals
26.5 to 28 Vdc depending on state of charge.
Figure 3.8.3 – Testing DC Receptacle
Better than 10 MΩ, ensure no short exists.
Negative(-) dc receptacle terminal and unit case.
Positive (+) dc receptacle terminal and unit case.
NOTE
!
Unit should be disconnected from any ac power sources prior to testing.
If unit is left charging after the batteries are fully charged, the unit will enter a
standby mode
. The voltage will drop from 28.60 to 28.10 volts (±0.10).
When a load greater than 2 amps is applied, the unit will return to normal
operation.
NOTE
!