Table  2-2.  Generator  Set  Troubleshooting  (Cont) Malfunction Probable   cause Corrective action e. Fuel level e. Terminals 4 and 16 of A5. relay  K8. NOTE Start the generator set and open the protection bypass switch S7. Remove the jumpers installed in c, d, and e above. If the set stops when one of the jumpers is removed,   that  component  is  defective  and must be replaced. If the set shuts down when the jumper in step d is removed test OP and WT and replace  the  defective  component. 32. Paralleling DC relay control With set stopped, check resistance lights,  DS4 circuit  assembly between A5 terminals 7 and 8 for and/or DS5, (A5)  defective. DS5, and terminals 19 and 20 for will not light DS4.  Resistance  should  be  7500 with S6 in Ohms ±5.0 percent. If no continuity, parallel replace  dc  relay  board  (A5)  (para  8-6 position and 8-7). 33. Improper  governor Current  transformer Measure  resistance  of  R23,  R24, operation  (i.  e., resistor  board  (A7) and R25 on A7 (located in pre- load sensing) defective. cise relay box on Class 1, Mode 1 sets - in set special box on other sets). Replace any resistor that does not read 7.5 ohms ±0.5 percent (fig. 8-2 and 8-3). 34. Generator Governor   resistor set hunts Check capacitor (C1) on A6, between board capacitor (Cl ) pins 5 and 6. Replace a defective defective (Class I only) capacitor. (60 mfd non-polarized) (fig.  8-4  and  8-5). 35. Main  AC  con- a. Defective   short a. Check  relay  K13.  Replace  if tactor  (CB2) circuit   relay defective (para 8-6 and 8-7). will  not  close K13. b. Defective overload b. Check  relay  K14.  Replace  if reload  relay  K14. defective. c. Defective  reverse Check  relay  K15.  Replace  if power  relay  K15. c_“ defective (para 8-6 and 8-7). d. Defective  under- d. Check  relay  K11.  Replace  if voltage  relay  K11. defective. (para 8-6 and (Class  I  only) 8-7). e. Defective  under- e. Check  relay  K12.  Replace  if frequency defective. (para 8-6 and relay  K12. 8-7). f. Defective   permis- f. Check  relay  K16.  Replace  if sive paralleling defective (para 8-6 and 8-7). relay  K16. g. Defective   contactor g. Check  switch  S3.  Replace  if switch S3. defective. (para 6-2). 2-18