PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IO-G-T-00-001e B
February 2016
GAS ENGINES TROUBLESHOOTING
2/10
SYMPTOM
PROBABLE CAUSE
REMEDY
The engine rotates, but does
not start
Ignition fails
1. Pickup broken, faulty, dirty or in wrong
position
2. Incorrect pick-up wiring, loose or broken
wire
3. Reset pickup and hall-effect pickup are
not synchronised
(1)
.
4. Pick-up wrong positioned
5. Defective
ignition
module
6. Faulty spark plugs
7. Failure of high-voltage wires or coil
8. Incorrect programmed angle of reset pin
(1)
1. Check, clean or change pickup as
appropriate
2. Check and change wiring as appropriate
3. Synchronise with an oscilloscope
4. Change ignition module
5. Adjust the position of pick-up
6. Change or regap spark plugs
7. Check coils and high-voltage wires
(IO-G-M-33-003e)
8. Measure and correct angle
Fuel system fails
1. Manual gas valve closed
2. Insufficient gas supply pressure
3. Emergency solenoid valve closed
4. Pressure controller off, incorrectly set or
defective
5. Carburetion
failure
6. Fouled gas filter
7. Mechanical carburetion screw closed
(2)
8. Zero pressure regulator broken or set
incorrectly
(2) (4)
9. Electronic gas valve closed
(3) (4)
1. Open gas valve
2. Check line or contact supplier
3. Check power supply and opening
4. Reset, adjust or change controller
5. Readjust carburettor mixture valve.
6. Clean or change filter
7. Open screw and carburet again
8. Change or set regulator correctly
9. Check shaft movement and supply
Insufficient compression
1. Broken or worn piston rings
2. Scratched
sleeves
3. Overhead valves do not close correctly
4. Defective cylinder head gasket
1. Change piston rings
2. Change
sleeves
3. Repair or change cylinder head
4. Change cylinder head gasket
Dirty air filters
Change air filters
Throttle valve does not open
1. Power supply failure
2. Mechanical
failure
3. Problems with the control system
4. Programming
error
(3)
1. Check power supply, batteries and
battery-charger
2. Check bearings and shaft bend
3. Check control system and change parts
where appropriate
4. Check
program.
Alarm on
Reset alarms
(1)
Engines with CPU95, GIS and GCS-e ignition system
(2)
Engines with mechanical carburetion
(3)
Engines with electronic carburetion
(4)
Engines with NOx sensor or lambda sensor carburetion
6.1.2
O&M_2.002211.810_A_10_2016