Stulz EC Tower ECD 91 - Page 184

184 EN/01.2019/G22 © STULZ GmbH – all rights reserved
ec tower technical manual
Red LED at
CPY-Controller (*)
description cause solution reset alarm
relay activation
action
4 slow ashes Low steam ow-rate
during reduced production.
The steam ow-rate
is estimated by the TAM
circuit
Conductivity of the
mains water too low.
The water conductivity
must be between 75
and 1250 μS/cm.
humidication
stopped
Too much foam in the
cylinder.
Perform the pre-wash
(see “Advanced functions”)
Excess scale in the
cylinder.
Clean/replace the cylinder.
TAM electrical circuit
not congured
correctly.
See solution to EF
(relating to TAM electrical
Malfunction in the TAM
electricircuit not congured)
Malfunction in the
TAM electrical circuit
5 slow  ashes Drain problem
Check the drain pump
and ll connection
Yes
Yes
humidication
stopped
Drain valve blocked /
malfunctioning
Check that the drain valve
is working correctly:
1. Switch unit o ;
2. short-circuit M2.5
with M2.6;
3. switch unit on;
4. can noise of the drain
valve opening be heard?
YES: remove drain valve and
clean;
NO: replace the valve.
Manifold blocked Remove cylinder and
valve and clean manifold.
Cylinder lter blocked
Replace the cylinder.
6 slow ashes
At CPY-
Controller
connect
clamps
M2-5 and
M2-7 with
jumper for
10-20 s.
At CPY-
Controller
connect
clamps
M2-5 and
M2-7 with
jumper for
10-20 s.
At CPY-
Controller
connect
clamps
M2-5 and
M2-7 with
jumper for
10-20 s.
The cylinder requires
maintenance due to
the accumulation of
lime scale.
The “Cylinder
almost depleted” and
“Cylinder depleted” warnings
can be disabled by
deactivating parameter b1.
The lime scale limits
steam production.
Routine maintenance:
check the correct
operation of the cylinder,
clean it and, if necessary,
replace it.
No signal only
7 slow ashes External control signal
not connected
correctly (2-10V only);
or - for control via serial
(variable I62 bit2=1) - no
data over 485 serial
connection
(cable probably
disconnected).
Cable broken/
disconnected/
not connected
correctly.
Check and connect
correctly.
AUTO Yes humidication
stopped
Incorrect voltage of
external control signal.
Set A0 =1; based on
external signal set
A2 = 0: 0-1V,
A2=1 0-10V, A2=2 2-10V,
A2=3 0-20mA, A2=4
4-20mA
Red LED flashes on the CPY controller (continued)