Stulz EC Tower ECD 91 - Page 183

183 © STULZ GmbH – all rights reserved EN/01.2019/G22
ec tower technical manual
Red LED flashes on the CPY controller (continued)
Red LED at
CPY-Controller (*)
description cause solution reset alarm
relay activation
action
6 fast ashes Back-up-memory broken. EPROM error
If the problem persists,
contact CAREL-customer
service.
-- No
7 fast ashes Maintenance time expired.
This is displayed when:
hour counter >
bb (default 3000 hours).
Maintenance time
expired.
Replace /clean the cylinder,
then set the hour
counter to zero via RS485.
(the alarm
returns in
50 h)
No signal only
8 fast ashes
Life timer expired. This is
displayed when the hour
counter> 1.5xbb (default
1.5x3000= 4500 h)
Life timer expired. Replace /clean the
cylinder, then set the hour
counter to zero .
Yes humidication
stopped
2 slow ashes Serial connection
interrupted
Cable broken/
disconnected/
not connected
correctly.
Or connected after
already established
communication
Check the electrical
connections and
operation of the supervisor.
AUTO Yes humidication
stopped
(if function is
activated)
signal only
(see “I” 62)
3 slow ashes No supply water: the
humidier tries to add
water but the level inside
the cylinder does not
increase at the expected
speed (the level of water
is estimated by the TAM
electrical circuit).
Low supply water
pressure.
The water supply pressure
must be between 0.1
and 0.8 MPa (1-8 bars).
automatic
(after
10 minute
delay)
yes
(in 10
minute
delay )
humidi cation
stopped
only for 10
minutes
Steam hose bent,
choked or blocked by
condensate: this
may cause high
backpressure that
prevents the water
from being lled into
the cylinder
Check and reposition/
replace
Excessive backpressure
in the hoses
To check this, switch the
unit o , remove the steam
hose from the cylinder and
switch the unit on:
ll water into the cylinder,
then reconnect the
steam hose.
Internal ll hoses bent,
choked or blocked
Check and reposition /
clean/replace
The drain valve leaks Check and clean
Fill valve blocked or
malfunctioning.
Check the correct operation
of the ll valve:
1. Switch the unit o and
on again: can the noise
of the valve opening be
heard? YES: go to “2”;
NO: go to “3”.
2. Clean/replace. If the
internal ow limiter,
installed at the valve outlet,
is detached from the valve,
the water may ow directly
to the drain through the ll
tank as the ow-rate is
too high. If this is the case,
replace the valve.
3. Replace the board.
At CPY-
Controller
connect
clamps
M2-5 and
M2-7 with
jumper for
10-20 s.