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Results
1. If the VOM indicated positive DC amperage between
50 milliamps to 2.5 amps, stop testing. The charger is
functioning properly.
2. If the VOM indicated negative DC amperage, replace the
controller.
1.00 A
Figure 158. Positive DC Amps
-1.00 A
Figure 159. Negative DC Amps
TEST 79 – CHECK T1 VOLTAGE AT CUSTOMER
CONNECTIONS
Procedure
1. Set a Volt-Ohm-Milliammeter (VOM) to measure AC
Voltage.
2. Connect one meter test lead to the T1 Terminal block at the
customer connections in the generator. Connect the other
meter test lead to the NEUTRAL connection. Measure and
record the voltage.
Results
1. If the VOM indicated 120 VAC, proceed to check voltage at
the J5 connector, refer back to flow chart.
2. If the VOM indicated less than 120 VAC or 0, refer back to
flow chart.
TEST 80 – CHECK T1 VOLTAGE AT J5
CONNECTOR
If 120 VAC was available at T1 and neutral of the customer
connection block, the problem may be an open wire or bad
connector at the J5 connection.
Procedure
1. Disconnect the J5 connector at the control panel.
2. With the VOM set for AC voltage, check the voltage at
the J5 connector between Pin 2 (T1) and the neutral
connection of the customer connection block. If Voltage is
present, proceed to Step 3. If voltage is not present check
the T1 wire from the customer connection block to the J5
connector.
3. Check the voltage between Pin 3 (00) of the J5 connector
and the T1 at the customer connection block. If voltage
is present inspect and repair the connection pins at Pins
2 and 3 of the J5 connector. If voltage is not available,
check the 00 wire from the customer connection block to
the J5 connector.
4. If 120VAC is present between Pins 2 and 3 of the J5
connector, and the pins are in good condition, then the
fault lies in the controller itself. Replace the controller.
TEST 81 – CHECK T1 VOLTAGE IN TRANSFER
SWITCH
Discussion
If 120 VAC was not present in the Generator; the most likely
cause is a blown T1 fuse or an open wire.
Procedure
1. Set the VOM to measure AC voltage.
2. Connect one meter test lead to the bottom side of the T1
fuse holder and the other meter test lead to the NEUTRAL
connection. Measure and record the voltage.
Results
1. If the VOM indicated 120 VAC, repair or replace Wire T1
between the Generator and the Transfer Switch.
2. If the VOM indicated less than 120 VAC or 0, refer back to
the flow chart.
ENGINE/DC CONTROL
PART 4
Section 4.5
Diagnostic Tests
ENGINE/DC CONTROL
PART 4
Page 141
Section 4.5
Diagnostic Tests
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