Homa C250WA, Original Instruction Manual

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30 | EngliSH
6. Maintenance
6.1. General
The entire system must be inspected and maintained at
regular intervals.
The following points must be noted:
• The operating instructions must be available to the
maintenance personnel and must be followed. Only
maintenance work and measures listed here must be
carried out.
• All maintenance work, inspection work and cleaning
work on the machinery and the system must be car-
ried out with due diligence, at a safe working place
and by trained qualified personnel. The required pro-
tective gear must be worn. The machinery must be
disconnected from the power supply for all work. Un-
intentional start must be prevented.
• Electric works on the machinery and the system
must be carried out by a specialist.
• If easily inflammable dissolvers and cleaning mate-
rials are used, open fire, open light and smoking are
prohibited.
• Ensure that the required tools and materials are read-
ily available. Tidiness and cleanness ensure safe and
proper work on the machinery. Remove used clean-
ing materials and tools from the machinery after the
work has been carried out. Keep all materials and
tools in a dedicated place.
A test run or function test of the machinery must only
be carried out according to the general operating con-
ditions!
6.2. Maintenance schedule
Every six months:
•
Visual inspection of the power supply leads
• Clean the collecting tank
6.3. Maintenance work
Visual inspection of the power supply cable
The power supply cable must be checked for bubbles,
cracks, scratches, scuff marks or pinch points. When
detecting damage, the power supply cable must be re-
placed immediately.
The cable may be replaced only by the manufacturer
or an authorized or certified service center. The ma-
chine may only be put into operation once the damage
has been properly fixed!
Cleaning the collecting tank
First isolate the collecting tank from the grid. Then remove
the lid from the hoist by loosening all clips. Now rinse the
container thoroughly with clear water. Then close the con-
tainer with the clips.
5.8. Switch-on types
Switch-on types with plug/switchgears
Insert the plug into the socket provided for and use the
on/off switch on the switchgear.
Switch-on types for cables with free ends (without
plug)
• Direct switch-on
For full load the circuit breaker should be set to the rated
current. For partial load we recommend to set the circuit
breaker 5% above the measured current at the operation
point.
• Switch-on star delta
If the circuit breaker is installed in the line: Set the circuit
breaker at 0.58 x rated current. The starting time in the
star-connected circuit may be a maximum of 3 s.
If the motor contactor is not installed in the circuit: For full
load set the circuit breaker at rated current.
5.8.1. After switching on
The rated current is surpassed quickly during the start-up
process. After termination of this process the work current
should not exceed the rated current. If the motor does not
start immediately after switch-on, it must be switched off
immediately. Before further switch-on the switch pauses
according to the technical data must be complied with.
In the event of a further interference the machine must
be switched off immediately. A further switch-on process
may only be started after recovery of the fault.
The following points should be checked:
• operating voltage (permitted dev/- 5% of the
rated voltage)
• Frequency (permitted dev/- 2% of the rated
frequency)
• Power input (permitted deviation between the phases
maximum 5%)
• Voltage difference between the individual phases
(maximum 1%)
• Switching frequency and pauses (see technical data)
• Introduction of air in the feed stream, an impact plate
must be fitted, if appropriate.
• Minimum submersion in water, level control, protec-
tion against dry run
• Smooth run
• Check for leakages, if appropriate take the necessary
steps according the chapter ‘maintenance’