Operation Of The Emergency Relay - Kubota SQ-1120 Operator's Manual

38

OPERATION OF THE EMERGENCY RELAY

OPERATION OF THE EMERGENCY RELAY
MOKUJIYOU
The SQ series generator is equipped with an emergency unit (EG-20) that is designed to detect trouble and stop the engine
automatically.
1. What to detect
Trouble
Oil pressure fall
Water temperature rise
Belt broken
Load center cover or door
open
Start-up delay time
A All the alarms but the door-related one are kept inactive for a certain period of time (7 to 14 seconds) after the key
switch is set from "START" to "ON" position.
Start delay period.
This interval is necessary to prevent the engine from shutting down while oil pressure is still low after engine start-up.
2. Method at start-up
1. Set the key switch to "ON" position, and the electric fuel feed pump turns ON.
2. Set the key switch to "GLOW" position, and the solenoid turns ON.
3. Set the key switch to "START" position, and the starter is activated. Turn it back to "ON" position, and the emergency
unit starts automatic detecting.
A If the starter is activated but the engine fails to start, the oil pressure switch stays ON. If the key switch is turned and
left at "ON" position in this state, the solenoid and fuel electric feed pump will turn OFF after the start delay period. To
have the engine restarted, turn the key switch back to "OFF" position again.
3. Method with an alarm
1. If any of the warning lamps is ON, turn OFF the solenoid and electric fuel feed pump and the engine stops.
2. To restart the engine, turn the key switch back to "OFF" position then start again.
A When this device stops the engine, it may be that a malfunction and some minor damage to the engine has occurred.
To limit engine damage as much as possible, please do not make the assumption that shut down was a false alarm.
Check unit thoroughly prior to restarting.
A Be sure to turn the key switch back to "OFF" position, or the battery will be dead.
Detection
Oil pressure switch
(ON at below 49 kpa (7 psi))
Water temperature switch
(ON at above 115 3 C (239
Voltage of alternator terminal L
(Charge lamp ON: Stop or trouble)
(Charge lamp OFF : Normal)
Safety switch
(ON : Open)
(OFF : Closed)
*The oil pressure switch stays ON after the start
delay period.
*The water temperature switch stays ON after
5 F)) the start delay period.
*The alternator terminal L stays at "L" after the
start delay period.
*The door limit switch comes ON when the key
switch is set from "START" to "ON" position at
starting.
(*The door limit switch is located on the load
center cover and on the access door.
*The door limit switch is activated when the load
center cover or the access door is opened.)
Method