Kubota SQ-1120 Operator's Manual page 54

4. Alarms and Corrective Measures
If a trouble occurs during operation, a corresponding indicator lamp lights up and the engine stops. Determine at which
lamp is ON, and pinpoint and correct the cause of trouble.
Light-up
Engine overheating.
Lamp (1)
Water temperature sensor faulty.
Water temperature sensor wiring faulty.
Insufficient engine oil.
Lubricating system in trouble.
Lamp (2)
Oil pressure sensor faulty.
Oil pressure sensor wiring faulty.
Fan belt loose or damaged.
Lamp (3) Alternator terminal in poor contact.
Alternator problem.
Access door opened.
Lamp (4) Limit switch faulty.
Limit switch wiring faulty.
Possible Causes
OPERATION OF THE EMERGENCY RELAY
(1) Water temperature lamp
Lights up if the engine is overheating.
(2) Oil pressure lamp
Lights up if engine oil pressure is too low.
(3) Battery charge lamp
Lights up if there is a battery problem or if the belt is broken.
(4) Access door open lamp
Lights up if the load center cover or the access door is opened.
Countermeasures
*See "Precaution Overheating" in
"PERIODIC SERVICE" section. (See page 30.)
*Replace the water temperature sensor.
*Repair the wiring.
*Add engine oil.
*Check the system.
*Replace the sensor.
*Repair the wiring.
*Readjust belt tension or replace the belt.
*Connect tightly.
*Check the alternator.
*Close the door.
*Replace the limit switch.
*Repair the wiring.
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