Troubleshooting Procedures; General; Equipment For Troubleshooting; Parts Replacement - Hobart 60CU20 Operation And Maintenance Manual With Illustrated Parts List

OM-2226 / Operation and Maintenance Manual
60CU20 / Series 500062 / 400 Hz. Generator Set
Section 4

1) General

The Troubleshooting Chart and Fault Code Chart located in this section cover the common faults and
malfunctions that you may find during operation or maintenance of this equipment. The charts may not
list all faults and malfunctions that may occur. If a fault of malfunction is not listed in the chart, start
looking for the cause at the source of power in the affected circuit. Refer to the schematic and connection
diagrams in Chapter 5. Test the circuit systematically until the source of the malfunction is isolated.
The Fault Code Chart is arranged under two headings: Commands and Faults. Commands display the
operation mode at the time a fault code is triggered.
WARNING
Exercise extreme care to avoid contact with high voltage leads and components.
High voltage can kill!
CAUTION
Maintenance personnel must be very careful when performing terminal-to-terminal
checks to be certain the proper terminals are being used, especially when using
jumper leads. Damage to electrical components may result from the application of
improper voltage and current.

2) Equipment for Troubleshooting

A good quality multi-scale voltmeter is the only instrument required for troubleshooting. At least two
jumper leads with alligator, or similar clips, will be required. The engine electrical system may be used as
a 12 VDC power source.

3) Parts Replacement

To lessen end item down time and to get a faulty machine back on line as quickly as possible, the black
box concept of parts replacement is reflected in the Troubleshooting and Fault Code Chart. For example,
if a component on a control box board is defective, the quickest way to remedy the situation is to replace
the complete board and send the old to stock. Some of the assemblies that tend to lend themselves to
this concept are:
•
Voltage regulator Board (REG)
•
Control board (CTL)
•
Engine Specific Board (ESB)
•
Engine Interface Board (EIB)
•
LED Board (LED)
•
28.5 VDC Transformer-Rectifier Board (TRB) [optional]
May 2, 2013
Revision 2

Troubleshooting Procedures

Chapter 2-4
Page 1