The following chapter describes potential causes for disruptions and
the work that is necessary to restore operation.
In the event of more frequent malfunctions, shorten the mainte-
nance intervals according to the actual load.
Contact the manufacturer concerning malfunctions which are not
solved by the subsequent notices; see service address on the back
cover.
P ersonnel
• Unless indicated otherwise, the work described herein to solve
malfunctions may be performed by the operator.
• Some work may only be carried out by qualified personnel, which
is specifically indicated in the description of the individual
malfunction.
• Work on the electric system may only be performed by profes-
sional electricians.
Electric shock and moving parts hazards
Serious injury or death can be caused by touching live electrical
components and by unexpected movement of the actuator.
Be sure power supply is off and actuator is locked out before
installing.
DANGER
Danger if restarted without authorization
When correcting faults, there is danger of the energy supply
being switched on without authorization. This poses a lifethreat-
ening hazard for persons in the danger zone.
Therefore:
• Prior to starting work, switch off the system and safeguard it
from being lockout.
DANGER
9 Malfunctions
Electrical equipment
Safeguarding against restart
77
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