MULTIQUIP DCA Series - Engine Troubleshooting Guide (Continued)

PAGE 84 — GENERATOR SERVICE AND TROUBLESHOOTING MANUAL — REV. #0 (08/29/23)
TROUBLESHOOTING
(
ENGINE
)
Troubleshooting (Engine) - continued
Symptom Possible Problem Solution
Low engine power output and low speed,
black exhaust smoke.
Air  lter blocked? Clean or replace air  lter.
Incorrect valve clearances? Adjust valves per engine speci cation.
Malfunction at injector? See engine manual.
Engine overheats.
Too much oil in engine crankcase?
Drain off engine oil down to upper mark on
dipstick.
Entire cooling air system contaminated or
blocked?
Clean cooling air system and cooling  n
areas.
Fan belt broken or elongated? Change belt or adjust belt tension.
Coolant insuf cient? Replenish coolant.
Radiator net or radiator  n clogged with dust? Clean net or  n carefully.
Fan, radiator, or radiator cap defective? Replace defective part.
Thermostat defective? Check thermostat and replace if necessary.
Head gasket defective or water leakage? Replace parts.
Engine cranks but will not start
Defective fuel relay? Check or replace relay.
Loose wiring? Inspect wiring.
Defective ECU Check or replace ECU.
Defective MPU? Check or replace MPU
Engine hunting
Defective AVR? Check or replace AVR.
Defective ECU Check or replace ECU
Engine starts and shuts down after a
few seconds
Defective ECU Check or replace ECU
Low oil pressure Check and repair.
High coolant temperature Check and repair.
Excessive black smoke
Wet stacking?
Run engine at a high temperature.Reference
load bank or Power Balance
TM
applications.
Excessive white smoke
Air in fuel system? Reference engine service manual.
Engine overheating
Defective thermostat
Replace thermostat. Reference engine
service manual.
Radiator clogged?
Clean/ ush radiator. Reference engine
service manual.
Defective water pump?
Replace water pump. Reference engine
service manual.
Worn or cracked coolant hoses?
Replace hoses. Reference engine service
manual.