Maico EZR B Series, Монтаж и эксплуатация, Страница: 20 / 38

UK │ 10. Electrical connection
18
10.2 Connecting speed controller to
EZR …
For stepless control of EZR units. For speed
controller suitable for unit type
 Internet or
catalogue.
The technology in the phase angle
controller may cause a humming
noise.
NOTICE
The fan will stop / suffer functional
problems if the output voltage on the
speed controller is too low.
Observe information in the speed controller
operating instructions. Always set the
minimum speed on the speed controller
such that the fan motor starts up again after
power failure.
10.3 Connecting 5-step transformer to
EZR …/DZR …
For stepped speed adjustment of EZR/DZR
units. For 5-step transformer TR… or TRV
suitable for unit type
 Internet or catalogue.
11. Commissioning, function test
1. Switch off mains fuse, secure against
being accidentally switched back on and
position a warning sign.
2. Check that all screw connections are tight.
3. Ensure that the air can flow unhindered
and that there are no foreign bodies in the
air channel.
4. Check that connection data matches
technical data on the unit (  rating plate).
5. Remove protection against switching back
on and switch on mains fuse.
6. Run function test. Check the direction of
rotation / air flow direction and that the
impeller runs quietly and ensure if
necessary.
7. Switch off unit.
12. Cleaning, maintenance
Cleaning: Before cleaning, switch off mains
fuse, secure against being accidentally
switched back on and position a warning
sign.
If required, the unit is cleaned with a dry
cloth. The operator should determine the
cleaning intervals – frequency depends on
ambient conditions and anticipated
impairments.
Maintenance: EZR/DZR units require no
maintenance. Despite this, check the unit
from time to time for bearing noise, damage
and disproportionate vibration. If necessary,
clean the unit of dirt/foreign particles as
described above.
Never use water or a high-pressure cleaner
on the interior.
13. Fault rectification
Check whether the thermal motor protection
(PTC thermistor triggering device) has
tripped. Once the motor protection has
cooled down, switch the unit on and check
for unusual noise.
Fault finding and repairs only permissible
when carried out by trained specialists.
Fault Cause, measure
Fan does not
switch on. No mains voltage.
Check whether the mains
fuse has failed. Switch on
if necessary.
Motor's thermal
overload
protection
switches the fan
off. Motor too hot.
Leave the unit switched off
until the motor and the
temperature limiter cool
down.
Cool-down time can be
up
to 30 minutes . Only then,
switch the unit back on.
Fan does not
switch on.
Impeller is blocked.
Repairs may only be
carried out by an
electrician:
Check impeller
and clean if necessary.
i