Stulz EC Tower ECD 91 - Page 185

185 © STULZ GmbH – all rights reserved EN/01.2019/G22
ec tower technical manual
Red LED at
CPY-Controller (*)
description cause solution reset alarm
relay activation
action
8 slow ashes High water level without
humidication demand.
Alarm ON if the water
reaches the high level
electrodes when the
humidier is shutdown or
disabled (contactor open,
 ll & drain valves closed)
Leaks from the  ll valve.
Check for any leaks from
the ll valve and clean/
replace
AUTO Yes signal only
High level sensor
shortcircuited.
Wenn möglich, den
nen und
reinigen.
Malfunction of the
high level sensor
electrical circuit .
Make sure the electrical
connections between
the sensor and the board
are correct: reconnect
if necessary or replace
the board.
9 slow ashes
Foam. Lubricants, solvents,
detergents in the
supply water (at times
the water hoses are
dirty after installation).
Wash all water supply
hoses thoroughly. The
water conductivity must be
between 75 and
1250 μS/cm.
Softening the water may
worsen the problem.
No signal only
Softened water.
High level sensor
shortcircuited.
If possible, open the cylinder
and clean it.
Malfunction of the high
level sensor electrical circuit.
Make sure the electrical
connections between
the sensor and the board
are correct; if necessary
replace the board
10 slow ashes Cylinder depleted. The
alarm is displayed when
the cylinder is almost
depleted - and production
cannot satisfy demand within
3 hours from the cylinder
almost depleted warning.
The “Cylinder
almost depleted” and
“Cylinder depleted” warnings
can be disabled by
deactivating parameter b1.
The cylinder is full of
akes.
Replace the cylinder -- No signal only
none Cylinder cleaning
phase started signal
-- -- --
none Cylinder drain in
progress
-- -- --
(both codes displayed
alternating)
Complete drain due to
inactivity
-- --
none
At CPY-
Controller
connect
clamps
M2-5 and
M2-7 with
jumper for
10-20 s.
Antifoam active -- -- --
- To reset the alarms connect clamps M2-5 and M2-7 at the CPY-Controller with a jumper for 5-10 s.
The applied voltage is max. 24 V AC.
- When resetting the hour counter on the CPY controller, connect clamps M2-5 and M2-7 with a jumper for 10-20 s.
The applied voltage is max. 24 V AC.
(*) Fast ash: 0.2 seconds ON and 0.2 seconds OFF;
Slow ash: 1 second ON and 1 second OFF (see the alarm diagrams)
Red LED flashes on the CPY controller (continued)

clean the steam cylinder