Stulz EC Tower ECD 91 - Page 182

182 EN/01.2019/G22 © STULZ GmbH – all rights reserved
ec tower technical manual
7.2.6 Red LED flashes on the CPY controller
Red LED at
CPY-Controller (*)
description cause solution reset alarm
relay activation
action
2 fast ashes Excess electrode current:
current> maximum
limits
Conductivity of the
water too high, errata
conguration TAM
The water conductivity must
be between 75 and
1250 μS/cm. Softening the
water may worsen
the problem
AUTO Yes humidication
stopped
TAM electrical circuit
not congured
correctly
Switch unit o and congure
TAM jumper. Switch unit on
and check if the
alarm is repeated.
Malfunction in the
TAM electrical
circuit
Check the correct operation
of the TAM circuit:
1. Check the signal
generated by the TAM: this
must be between 0-2 Vac.
2. Check the correct
connection between the
TAM and the board:
restore the connection if
necessary.
3. Replace the TAM.
4. Replace the board.
3 fast ashes Internal memory error The software or the
conguration
parameters are
corrupted.
Download the correct
conguration via humi-
Set; replace the board.
- Yes humidication
stopped
4 fast ashes
Conguration
parameter error.
The conguration para-
meters are corrupted
- Yes humidication
stopped
5 fast ashes Conductivity of the water
too high. The alarm occurs:
• After 1 hour if
conductivity > b6 for
more than 1 hour,
OR
• Immediately if
conductivity > 3x b6
High water conductivity
alarm threshold.
Increase the high water
conductivity alarm
threshold with
parameter “b6”.
AUTO No (b5)
Yes (b6) humidication
stopped
signal only
5 fast ashes Conductivity of the
water higher
than 1250 μS/cm.
Treat the supply water
with RO and ensure the
minimum supply water
requirements (see the
KUE manual)
The water conductivity
must be between 75
and 1250 μS/cm.
Softening the water may
worsen
the problem.
Conductivity probes
shortcircuited.
Clean the probes
Malfunction in the
conductivity meter
electrical circuit
a. Check the correct operation
of the conductivity meter
electrical circuit:
1. Check the electrical
connections between the
conductivity meter and the
board: if necessary, restore
the connection.
2. Replace the conductivity
meter/ll tank.
3. Replace the board.
4. Replace the board.