Hobart 60CU24, Operation And Maintenance Manual With Illustrated Parts List, Page: 108 / 234

OM-2098C / Operation and Maintenance Manual
60CU24 / Series 500060C / 400 Hz. Generator Set
April 01, 2005 Chapter 2-4
Page 14
Trouble, Symptom, Condition Probable Cause Test, Check, and/or Remedy
Engine Controls (continued)
a. Improper engine adjustments
and gear train timing
“Tune-up” engine in accordance
with engine manufacturer’s
operation manual.
b. Insufficient fuel Check low fuel level in accordance
with engine manufacturer’s
operation manual. Repair or
replace parts as required.
c. Insufficient inlet air due to
damaged or dirty air cleaner.
Check air cleaner for “plugging”
and/or damage.
11. Engine lacks power
d. Restricted exhaust system Check exhaust pipes for
restrictions. Check muffler for
clogged condition. Replace as
required.
Trouble, Symptom, Condition Probable Cause Test, Check, and/or Remedy
Generator Excitation Circuits
a. Defective generator or
excitation circuit.
On REG place Regulated/
Diagnostic switch in Diagnostic
position. This applies 12 VDC
from battery to exciter field, which
should produce an indicated
output voltage of 100 +/- 20 VAC
line to neutral. If voltage produced
is within this range, the generator
is good, and trouble is in voltage
regulator circuit. Proceed to Step
b .
b. Defective voltage regulator
(REG)
Connect a properly working REG
board to regulator wiring
assembly, avoid short circuiting
bottom of properly working REG
board. Then start generator set
and perform tests and adjustments
according to instructions in Section
2-3. If generator set works
properly with a properly working
REG board temporarily connected,
shut off generator set and replace
defective REG board with one that
is properly working (preferably,
same REG board used for this
troubleshooting check).
1. No (or low) generator output
voltage in all phases. Generator
operating at 400 Hz.
c. Open fuse on REG. Check fuses thoroughly. Replace
fuses if defective.