service manual - Expert-CM

For espresso only:
Coffee is dispensed too
slowly and it tastes
burnt.
For espresso only:
The coffee lacks body
and is dispensed too
quickly.
The mixers clog up
Excessive coffee dose or ground too finely. The dose is calculated using an algorithm that
counts the number revolutions of the grinder,
and the doses are dispensed correctly if the
grinder is adjusted with the correct grade of
grinding.
Check that the distance between the grinding
wheels is the factory default one.
Coffee dose too small, or ground too
coarsely.
Failed rotation of the mixer.
Excessive instant product dose.
Steam exhaust box clogged.
Water to powder ratio not correct.
NW Global Vending – TECHNICAL MANUAL
This document was produced by MARK AC for the exclusive use of the technical personnel in the after-sales service.
. No part of this document may be divulged to a third party or reproduced partially or entirely without the prior permission of NW GLOBAL VENDING
. All rights reserved.
The dose is calculated using an algorithm that
counts the number revolutions of the grinder,
and the doses are dispensed correctly if the
grinder is adjusted with the correct grade of
grinding.
The dispensing time must remain constant.
Check that the distance between the grinding
wheels is the factory default one; with use the
grinding wheels are subject to wear and it will
be necessary to reset the correct measurement
periodically.
Check for the motor overheat protection trigger,
if necessary check the cause of such trigger.
Empty the powder removal box, adjust and
check the correct water to powder ratio.
Check the logic of the cycles.
Check the activation of relay K3.
New dispenser “KORO” 07/10/2005 page 38 / 42