Switching On; Checks When Starting Work; Function Checks - DEMAG DC-Com 1 Operating Instructions Manual

Ensuring safe operation
Special local conditions or special applications may lead to situations which were not known when this chapter
was written. In this case, the owner must ensure safe operation or take the machine out of service until measures
for safe operation have been clarified and implemented in agreement with Demag or other relevant bodies.
In the event of a stoppage (e.g. if defects regarding safe and reliable operation are detected, in emergency situa‐
tions, in the event of operating malfunctions, for repairs and maintenance purposes, if damage is detected or after
finishing work), the operator must carry out all prescribed safety measures or observe that they are automatically
carried out.
Work on electric equipment may only be carried out by qualified electricians.
7.2

Switching on

7.2.1

Checks when starting work

Before starting work, the operator must be satisfied that the machine is in safe and correct operating condition.
Ensure that nobody is endangered by operation of the machine before it is switched on or put into operation. If the
operator notices persons who may be exposed to a risk to their health or personal safety by operation of the in‐
stallation, he must stop operation immediately and may not resume operation until the persons are outside the
danger zone.
The chain hoist must be taken out of service without delay if there are any defects which endanger safe and relia‐
ble operation. Defects relevant to safety in this sense are, for example:
● Damage to electric devices, cables or insulation,
● Delayed operation or failure of brakes and safety devices,
● Missing covers or housing parts or
● Damage to the chain or to supporting parts.
Anybody who identifies an immediate danger of personal injury must actuate the emergency stop without delay.
This also applies if damage occurs to parts of machinery or equipment which makes an immediate stoppage nec‐
essary.
If the chain hoist has been stopped by an emergency stop due to safety-related defects, it must be secured
against being returned to operation until an experienced technician is satisfied that the cause of the hazard situa‐
tion has been eliminated and that operation of the machine is possible without any hazard.
Before starting work:
● Wear protective equipment.
● Ensure that nobody is present in the danger zone of the equipment.
7.2.2

Function checks

Instructions for users where the BGV D06 accident prevention regulations apply:
In accordance with BGV D06, the crane operator must also check operation of the emergency-stop device when
he or she starts work. This does not apply to slipping clutches used as an emergency-stop device which do not
need to be checked when work begins (BGV D06, Section 30). DC chain hoists are fitted with a slipping clutch as
an emergency-stop device which does not need to be checked by the crane operator, therefore a device to by-
pass the limit switches which are approached during normal operation is not fitted.
The following main functions of the machine must be checked before work begins:
Activity
Check emergency-stop device
Check 7-segment display
Check chain lubrication (under arduous conditions, the chain must be lubricated more fre‐
quently)
Check function of the lifting motion operating limit switch
Check cut-off buffer/cut-off spring/operating limit switch actuator
Check control cable and control pendant housing for damage
Check operation of the brake
Check hook and hook safety catch
56 Tab. 40
Section
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 "7-segment display for operating status and fault
display", Page 29,
 "Display of software version, operating hours, num‐
ber of cycles", Page 30
 "Available hoist chains", Page 77
 "Checking operating limit switches", Page 71
 "Checking the cut-off buffers/cut-off springs",
Page 86
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-
 "Checking the load hook", Page 83
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