MMD Equipment 400S-6B1 - Manual (Page 25)

4. Operation
4-2
4.2 Protection device
For prevention of troubles during operation, this machine is provided with various protection devices.
When the engine stops due to function of the protection devices and circuit breaker trips, get rid of the
causes of trouble, referring to the trouble shooting clause and then restart operation.
4.2.1
List of protection devices
This machine is equipped with the following devices in the table. Repair and make necessary
treatment in accordance with the item ○.
Item
Engine
stops
Three-phase
circuit
breaker trips.
Lamp
display
Monitor Functions
Engine oil
pressure drop
○ ― ○
When engine oil pressure drops, it
functions.
Operating pressure:
lower than 21psi (0.15MPa)
Engine water
temperature
rises.
○ ― ○
In case of abnormal rise of engine
water temperature, it functions.
temperature reaches:
more than 214°F (101℃)
Clogging of air
filter
― ― ○
When air filter is clogged and it
becomes necessary to clean it, it
functions.
Overcrank ○ ― ○
This lamp goes on when operator
fails to start engine, during
automatic operation mode.
Turbo
protect
― ―
＊ 1
○
It keeps engine idling at low speed
for a few seconds when ambient
temperature remains low after
starting engine.
Overcurrent or
short circuit
― ○ ― ―
In case of overload or short circuit
accident, it functions.
Diagnostic
lamp
― ―
＊ 2
○
This lamp blinks when engine
trouble happens. Then, a pattern of
lamp signals changes if
“DIAGNOSTIC BUTTON” is
pushed. The pattern of lamp signals
shows what’s kind of trouble
happens.
＊ 1：Lamp glows only while it functions.
＊ 2：The kind of trouble can be checked by the pattern of the blinking signal if the diagnostic button is
kept pushing when the warning lamp turns on. On the other hand,the diagnostic signal does not
turn on when the emergency lamp turns on.