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cod. carel +030221900 rel. 2.0 dated 05/03/01
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1. no electrical power;
2. external switch of the humidifier in
position 0 (off);
3. control connectors badly connected;
4. broken fuses;
5. transformer fault
1. check the protection devices upstream the
humidifier and the presence of power;
2. close the switch on the panel: position I;
3. check that the connectors are properly inserted
in the terminal block;
4. check the condition of fuses F1/F2/F3;
5. check that the voltage across the secondary
winding of the transformer is 24Vac
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1. remote ON/OFF contact open (terminals
AB – AB);
2. the humidistat has not been connected
correctly;
3. humidistat fault (cVR/SET stays
open)
1. close ON/OFF contacts (terminals AB – AB);
2. check the external connection;
3. replace the humidistat
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1. too much backpressure in steam outlet;
2. cylinder inlet filter blocked;
3. lime scale in the supply tank;
4. drain electrovalve malfunction
1. check that the steam outlet pipe is not bent or
choked;
2. clean the filter;
3. clean the supply tank;
4. check for the presence of 24Vac at the drain
electrovalve and/or replace drain electrovalve
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thermal-magnetic overload switch is under-
rated
check that the thermal-magnetic overload switch
is rated for a current of at least 1.5 times the
rated current of the humidifier
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1. the distributor is not installed correctly;
2. humidifier over-sized;
3. humidifier active when the fan in the duct
is off
1. check that the steam distributor is installed
correctly;
2. change humidifier model;
3. check the connection of the device (flow
switch or differential pressure switch) slaving
the humidifier to the ventilation in the duct
(terminals AB - AB)
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1. the humidifier drain is blocked;
2. the supply water or overflow circuit has
leaks;
3. the condensate drain pipe does not bring
the water back to the supply tank;
4. the steam outlet pipe is not properly
fastened to the cylinder
1. clean the drain in the bottom tank;
2. check the entire water circuit;
3. check the correct position of the condensate
drain pipe in the supply tank;
4. check the fastening of the pipe clamps on the
steam outlet
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