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9.2.6.7
Servicing the external fan
● Check the external fan every 12 months for mechanical vibration as specified in DIN ISO
10816. The maximum permissible vibrational severity is 2.8 mm/s measured on the end
shield of the impeller-side motor bearing.
● Regularly clean and inspect the fan. Impeller and frame are subject to natural wear
depending on the area of application and displacement medium.
WARNING
Impeller can crack
Due to deposits and the resulting imbalance there is a hazard of fatigue fracture of the
impeller. The impeller can crack in operation. Death, serious injury, or material damage
can result.
● Regularly clean and inspect the fan.
WARNING
Voltages at the internal motor connections
The motor may continue running, e.g. due to airflow, or may run on after being shut down.
This means that dangerous voltages of over 50 V can occur at the internal motor
connections. Death, serious injury, or material damage can result.
● For safety reasons, it is not permissible to make any unauthorized modifications or
changes to the fan.
● The external fan can automatically switch on and switch off as a result of its inherent
function.
● After a power failure or when the power has been disconnected, the external fan starts
up automatically again when the voltage is restored.
● Wait until the external fan has come to a standstill before approaching it.
● Provide a protective circuit that prevents the main motor from being switched on when
the external fan is not in operation.
Clean the external fan
WARNING
Danger of shearing
Death, severe injury and material damage can occur if you come into contact with the rotating
fan impeller.
● The fan impeller must be stationary when carrying out any work on the external cooling
system.
● Interrupt/disconnect the external cooling unit circuit.
● Lock out the circuit so that it cannot be switched on again.
Maintenance
9.2 Inspection and maintenance
SIMOTICS M-1PH8 1PH818., 1PH822.
112
Operating Instructions 07/2016
Summary of Contents for 1PH818
Page 2: ...18 07 2016 14 04 V14 00 ...
Page 12: ...Introduction SIMOTICS M 1PH8 1PH818 1PH822 12 Operating Instructions 07 2016 ...
Page 28: ...Description SIMOTICS M 1PH8 1PH818 1PH822 28 Operating Instructions 07 2016 ...
Page 100: ...Operation 8 10 Faults SIMOTICS M 1PH8 1PH818 1PH822 100 Operating Instructions 07 2016 ...
Page 136: ...Quality documents SIMOTICS M 1PH8 1PH818 1PH822 136 Operating Instructions 07 2016 ...
Page 197: ...AA Manual STROMAG Break AC Manual Ziehl Abegg external fan ...