178 EN/01.2019/G22 © STULZ GmbH – all rights reserved
ec tower technical manual
17
ENG
“OEM KUE” +030222130 - rel. 1.3 - 12.03.2015
6. TROUBLESHOOTING
6.1 Troubleshooting table
Problem Cause Solution
The humidifier does
not turn on
• no electrical power supply;
• controller connectors plugged in incorrectly;
• fuses blown;
• transformer fault
• check the protection device upstream of the humidifier and that the power
supply is present;
• make sure the connectors are properly connected;
• check the fuses
The humidifier does not
start operation
• remote ON/OFF contact open or control signal not compatible
with the type set
• make sure the controller is working correctly
• manual supply valve closed, fill solenoid valve fault or inlet filter
dirty
• open the manual valve, check or clean the inlet filter to the fill solenoid
valve, replace the fill solenoid valve
• the steam hose is blocked or not installed correctly, that is, blocked
by condensate or choked (pocket that fills with condensate)
• check the positioning of the steam hose with reference to the assembly
instructions
The humidifier fills with
water without produ-
cing steam
• excessive backpressure in steam outlet;
• cylinder inlet filter blocked;
• lime scale in the supply tank;
• drain solenoid valve/pump fault
• check that the steam outlet hose is not bent or choked;
• clean the filter;
• clean the fill/supply tank;
• check for presence of voltage 24 Vac/230 Vac at the drain solenoid valve/pump
and/or replace the drain solenoid valve/pump
The line circuit breaker
is activated
• the circuit breaker is under-rated;
• excess current at the electrodes
• check that the circuit breaker is rated for a current equal at least 1.5 times
the rated current of the humidifier;
• check the operation of the drain solenoid valve/pump, the seal of the fill sole-
noid valve when not energised, drain some of the water and re-start
The humidifier wets
the duct
• the steam distributor is not installed correctly (too near the top of
the duct or the condensate return is blocked);
• the system is oversized;
• humidifier on when the fan in the duct is off
• make sure the steam distributor has been installed correctly;
• decrease the steam production, CP/CPY board;
• check the connection of the device (flow switch or differential pressure
switch) slaving the operation of the humidifier to the fan in the duct;
• check the remote ON/OFF input
The humid. wets the
floor below
• the supply or overflow circuit has leaks;
• the steam outlet hose is not properly secured to the cylinder
• check the entire water circuit;
• check that the clamp on the steam outlet is tight
Tab. 6.a
7 Troubleshooting
7.1 Troubleshooting
7.2 Cause of problem, remedy, alarm list
7.2.1 Humidifier alarm on C7000AT controller
-
7.2.2 Troubleshooting the humidifier on the CPY controller
DANGER
Danger of death from electric shock.
has been switched off at all poles.
To Next Page
Loading...
