MMD Equipment 400S-6B1 - Manual (Page 29)

4. Operation
4-10
4.4.5 Gauge Indication while Operating
Minimum discharge air pressure is 58psi ( 4.0 bar ) during operation
Continuing equipment operation at a lower pressure than the above pressure may cause overheating,
since it affects the separation of lubricating oil inside the oil separator and reduces the oil flow to the
compressor air-end, resulting in temperature rise.
Make sure that RPM is higher than 1,000min
-1
at no load (or low load) operation. Long continuous
operation at the lower speed than 1,000min
-1
could cause damage to each part by vibration. When
the speed becomes lower than 1,000min
-1
, stop the machine soon.
Be sure to check at times to see if gauges or each component of the unit are properly working, or
if there is any air-leak, oil-leak, water-leak or fuel-leak etc.
During normal operation, each indication of instruments is shown in the table below. Refer to
the table for daily checks.
The above table gives standard values. They may vary slightly depending on the operating
conditions and other factors.
Emergency Lamp
Protection
device
Engine oil
pressure
Coolant
temperature
Discharge
air
temperature
Engine
speed
down
Fuel
residual
level
Monitor
Starting
Starter
switch set
to “RUN”
position
○
ON
n
OFF
n
OFF
※ 1
n
OFF
n
OFF
In Operation
n
OFF
Note: ※1 When engine rises, a lamp goes on temporarily.
Warning Lamp
Indicator
Lamp Protection
device
Charging
Engine air
filter
Compressor
air filter
Preheating
Monitor
Starting
Starter
switch set
to “RUN”
position
○
ON
n
OFF
n
OFF
※ 2
○
ON
In Operation
n
OFF
Note: ※2 Lamp goes off after preheating completed.
Discharge air pressure
At Unloa 100 to 135psi (6.9 to 9.3 bar)
In
Operation
At Full Load 58 to 100psi (4.0 to 6.9 bar)