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5.4 Generator Set Maintenance

When it is necessary to perform maintenance or service

on the generator sets, use the following procedure to

remove one generator set from the system at a time.

1. On the generator set to be serviced, press the

AUTO and OFF buttons on the RDC2 controller

simultaneously for about 1 second.

2. Wait for the generator set to shut down. Turn off

non-critical appliances to reduce the load, if

necessary.

3. Press OFF to shut down the generator set, if

necessary.

4. Disconnect utility power to the generator set.

5. Disconnect the generator set battery, negative (- )

lead first.

6. Follow the instructions in the generator set manual

to service the unit as needed.

7. Reconnect the generator set battery, negative (- )

lead last.

8. Reconnect utility power to the generator set.

9. Press the AUTO and RUN buttons on the RDC2

controller simultaneously to return the system to

runtime hours mode, if desired.

Fault Text

Voltage L1-L2 High Warning

Voltage L1-L2 Low Warning

Frequency High Warning

Frequency Low Warning

Current A High Warning

Reactive Power Low Warning

Real Power High Warning

Real Power Low Warning

* Pressing OFF will stop the generator set.

Figure 22 Warning Messages (protective relay disconnect)

Description

Over Voltage

Under Voltage

Over Frequency

Under Frequency

Over Current

Loss of Field

Over Power

Reverse Power

5.5 Faults

Fault messages displayed on the RDC2 controller are

shown in Figure 22 and Figure 23.

To clear the warnings listed in Figure 22 press AUTO or

OFF.

Press AUTO to clear the fault without shutting down

the generator set.

Pressing OFF will clear the fault AND stop the

generator set.

LossOfComAPM Fault

One possible cause of this fault is that the primary

controller is powered down. If the primary controller is

powered off without using the AUTO-OFF sequence

described in Section 5.3.2, the paralleling system will

not function. To allow the system to function, go to the

secondary controller's Communications menu, RBUS

network. Set RBUS primary to True on the secondary

controller. When the former primary controller powers

up again, set RBUS Primary? to False. .

When Active

Warning

Delay

Paralleled

Display Cleared On

Press AUTO or OFF *

TT-1596

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