MMD Equipment 185S-6C2 - Manual (Page 28)

4.Operation
4-9
4.4.1 Procedure to start the unit
 Be sure to let unit warm-up after starting for smooth operation of the engine and the compressor.
Do not operate the engine at full load immediately after it starts up. This will shorten the equipment life.
 During the warm-up operation, examine the different parts of the equipment for any looseness, leakage
of water, oil, fuel, and other irregularities.
Also, make sure that monitor lamps are off.
<Procedure>
① Close fully service valve.
② Turn the starter switch“1”to “RUN" position, and the glow lamp“2”goes on.
③ As soon as the glow lamp“2”has gone out, turn the starter switch“1”fully clockwise to start up
the engine. (After starting, unload operation automatically begins.)
According to engine cooling water temperature, the times in the following table are required.
Engine coolant
temperature
Required time
for preheating
Required time for starting unloader operation
Higher than 32°F 2 sec 5 sec
Lower than 32°F 20 sec
Shorter time either 120 seconds or the time when
engine coolant temperature
becomes higher than 32°F.
④ Once the engine has started up, leave it running to warm-up for 5 minutes. The discharge air
pressure gauge“3”in this condition ranges from 44 to 102 psi (3 to 7 bar).
⑤ After finishing warming up operation, open the service valve provided at the outlet of
compressed air and start service job.
4.4.2 Operating procedures when engine fails to start up on first attempt
 When the engine fails to start up even after performing the startup procedures ① to ③, do not
keep the starter running, but set the starter switch back to “STOP” and wait about 30 seconds.
Then, repeat the startup procedure once again.
 If the repeated procedure does not allow the engine to run, the following causes are suspected.
Therefore, check the following:
 No fuel
 Clogging of fuel filter
 Discharge of battery (Low cranking speed)
 Ambient temperature is too low.
Be sure to warm-up
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