PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IO-G-T-00-001e B
February 2016
GAS ENGINES TROUBLESHOOTING
4/10
SYMPTOM
PROBABLE CAUSE
REMEDY
Engine does not reach rated
speed
Overload due to wrong reading of power
signal
Calibrate power signal
Fuel system fails
1. Low gas pressure
2. Misadjusted pressure regulator
3. Poor
carburetion
4. Clogged gas filter
1. Check supply line or contact supplier
2. Readjust or change spring
3. Readjust carburettor mixture valve
Check MAP and MAT signals
(1)
Check NOx sensor or lambda sensor
(2)
4. Clean or change filter
Fuel leaks
Repair leaks
Inadequate speed setting
Adjust rated speed setting
Clogged air filter
Change air filter
Engine stops
Fuel system fails:
1. Low gas pressure
2. Misadjusted pressure regulator
3. Poor
carburetion
4. Clogged gas filter
5. Regulator
off
6. Shut-off electric valve closed
7. Fuel
leaks
1. Check supply line or contact supplier
2. Readjust or change spring
3. Readjust carburettor mixture valve
Check MAP and MAT signals
(1)
Check NOx sensor or lambda sensor
(2)
4. Clean or change filter
5. Reset
regulator
6. Check valve power supply
7. Repair
leaks
No spark produced
1. Ignition
module
failure
2. Lead or connector loose
3. Pickup damaged or dirty, inadequate
spacing, wire detached or hall effect
pickup not synchronised
4. Power supply failure
1. Change
module
2. Check connectors and wires
3. Check and replace pickups if necessary.
Check synchronisation of reset and hall
effect pickups with an oscilloscope
4. Check voltage, batteries and chargers.
Stop caused by GKCS (knocking)
Boroscope engine
See knocking paragraph in next sheet
PLC alarm
Identify alarm and assess its importance
before resetting
Control system alarm
Check equipment and reset alarm
Overspeed
Check equipment and reset alarm
Running instability
Carry out a general check of engine to
determine the cause of instability.
Line dropping or micro-cut
Reset power supply
6.1.4
O&M_2.002211.810_A_10_2016