Yanmar 4LHA-HTP Operation Manual page 660

Chapter 9 Electrical System
4. Altemator
(2) Overcharging
Tum on the key switch.
(Start the engine.)
(3) Charge lamp failure
Check if the charge lamp lights
after turning on the key switch.
OK
After turning on the key switch
(after engine starting), check if
the charge lamp goes off.
V
Check the fan belt.
* Measure BAT voltage of
generator.
Defective
Check the wiring.
Replace charge lamp.
Charge lamp is OK if it goes off.
Measure BAT voltage of
generator.
9-34
Defective
Defective
OK
Defective
* •
4LHA Series
Replace IC regulator or generator.
o Replace fan belt,
o Adjust fan belt.
Replace the charge lamp.