Maico ERK 100 ST, Mounting And Operating Instructions, Page: 10 / 14

8. Installation
‒
Electrical connection
│
en
10
8.4 Operation with step transformer
The speed of ERK units (other than ERK .. T)
can be set gradually with a 5-step transformer
(type TR or TRE) appropriate to the unit type
(
online, catalogue).
ERK unit:
1 level: ERK 100, ERK 100 T
●
2 levels: ERK 100 S, ERK 100 ST, ERK
●
125, ERK 125 T, ERK 150, ERK 160
3 levels: ERK 200
●
8.5 Commissioning
1. Check that all screw connections are tight.
2. Check air channel for dirt and clean if
necessary.
3. Check that connection data matches
technical data on the unit (rating plate
unit instructions envelope).
4. Remove protection against switching back
on and switch on mains fuse.
5. Run function test. Check that the impeller
runs quietly and ensure this if necessary. It
is also important that the air can flow
unhindered.
6. Switch off unit.
9. Maintenance
The unit is maintenance-free.
10. Fault rectification
Call on the services of a trained electrician
●
any time there is a fault.
Repairs should only be carried out by a
●
trained electrician.
DANGER
Danger to life from electric
shock.
Prior to accessing the connection
terminals, switch off all supply
circuits. Switch off the mains
fuse, secure against being
accidentally switched back on
and position a visible warning
sign.
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 10 minutes. Only
then, switch the unit back
on.
Fan does
not switch on.
Impeller blocked.
Repairs may only be
carried out by a trained
specialist:
Check impeller
and
clean if necessary.
Deposits on the
impeller and in
the housing
caused by dust
in the air. Call on the services of a
trained electrician. Install air
filter in the duct system.
Under no circumstances
should the inside of the unit
be cleaned with water or a
high-pressure cleaner.
Impeller not
turning. Switch off unit. Ensure that
the impeller is not blocked
by foreign bodies.