M-Max Series Overview
16 M-Max Series Adjustable Frequency Drive    MN04020003E—October 2013    www.eaton.com
Proper Use
The M-Max frequency inverters are not domestic appliances. 
They are designed only for industrial use as system 
components.
The M-Max frequency inverters are electrical apparatus for 
controlling variable speed drives with three-phase motors. 
They are designed for installation in machines or for use in 
combination with other components within a machine or 
system.
After installation in a machine, the frequency inverters must 
not be taken into operation until the associated machine has 
been confirmed to comply with the safety requirements of 
Machinery Safety Directive (MSD) 89/392/EEC (meets the 
requirements of EN 60204). The user of the equipment is 
responsible for ensuring that the machine use complies with 
the relevant EU Directives.
The CE markings on the M-MAX frequency inverter confirm 
that, when used in a typical drive configuration, the apparatus 
complies with the European Low Voltage Directive (LVD) and 
the EMC Directives (Directive 73/23/EEC, as amended by 
93/68/EEC and Directive 89/336/EEC, as amended by 
93/68/EEC).
In the described system configurations, M-Max frequency 
inverters are suitable for use in public and non-public 
networks.
A connection to IT networks (networks without reference to 
earth potential) is permissible only to a limited extent, 
because the device’s built-in filter capacitors connect the 
network with the earth potential (enclosure). On earth free 
networks, this can lead to dangerous situations or damage to 
the device (isolation monitoring required).
To the output of the frequency inverter (terminals U, V, W) 
you must not:
●
connect a voltage or capacitive loads (for example, phase 
compensation capacitors)
●
connect multiple frequency inverters in parallel
●
make a direct connection to the input (bypass)
Observe the technical data and connection requirements. For 
additional information, refer to the equipment nameplate or 
label at the frequency inverter, and the documentation.
Any other usage constitutes improper use.
Maintenance and Inspection
Provided that the general rating data (see “Nameplate Rating 
Data” on Page 6) and the special technical data (see “Special 
Technical Data” on Page 142) of the ratings concerned are 
observed, the M-Max frequency inverters are maintenance 
free. However, external influences may affect the function 
and the lifespan of the M-Max frequency inverter. We 
therefore recommend that the devices are checked regularly 
and the following maintenance measures are carried out at 
the specified intervals.
There are no plans for replacing or repairing individual 
components of M-Max frequency inverters.
If the M-Max frequency inverter is damaged by external 
influences, repair is not possible. Dispose of the device in 
accordance with the respectively applicable environmental 
laws and provisions for the disposal of electrical or electronic 
devices.
Maintenance Measures and Intervals
Maintenance Measure Maintenance Interval
Clean cooling vents (cooling slits) If required
Check the fan function 6–24 months (depending on the environment)
Filter in the switching cabinet doors (see manufacturer specifications) 6–24 months (depending on the environment)
Check the tightening torques of the terminals (control signal terminals, power terminals) Regularly
Check connection terminals and all metallic surfaces for corrosion 6–24 months (depending on the environment)
Charge capacitors 12 months, see “Charging DC Link Capacitors” on Page 17