Carel UE035 User Manual download pdf (Page 69)

humiSteam - cod. +030221910 rel. 5.2 - 07.11.2005

10.4 Troubleshooting table

problem causes solution

the humidifier does not turn on 1. no electrical power; 1. check the protection devices upstream from the

2. external switch of the humidifier in position humidifier and the presence of power;

0 (open); 2. close the switch on the panel: position I;

3. control connectors badly connected; 3. check that the connectors are properly inserted in

4. broken fuses; the terminal block;

5. transformer fault 4. check the condition of fuses F1/F2/F3;

5. check that the voltage across the secondary

winding of the transformer is 24Vac

the humidifier does not start 1. remote ON/OFF contact open (relay/terminals 1. close ON/OFF contacts (relay/terminals AB – AB or

operation AB – AB or 7I – 8I); 7I – 8I);

2. the humidistat has not been connected correctly; 2. check the external connection;

3. humidistat fault 3. replace the humidistat

4. control signal not compatible with the type set 4. set parameters A0, A2-A9 correctly

5. value measured by the probe/s higher than the 5. check the values of the set point St and P7

corresponding set point

the humidifier loads up water 1. too high steam inlet counterpressures; 1. check that the steam inlet pipe is not folded or

without producing steam 2. inlet filter to the clogged cylinder; choked;

3. limestone in the supply tank; 2. clean the filter;

4. drain solenoid valve malfunction 3. clean supply tank;

4. check the anomalous presence of 24Vac on drain

solenoid valve and/or drain solenoid replacement

the thermal-magnetic overload 1. thermal-magnetic overload switch is under-rated 1. check that the thermal-magnetic overload switch is

switch is activated 2. over-current at the electrodes rated for a current of at least 1.5 times the rated

current of the humidifier

2. see description for alarm EH

the humidifier wets the duct 1. the distributor is not installed correctly (too near 1. check that the steam distributor is installed

the top of the duct or the condensate return is correctly;

blocked); 2. decrease the steam production set on the control;

2. system over-sized; 3. check the connection of the device (flow switch

3. humidifier active when the fan in the duct is off or differential pressure switch) slaving the humidifier

to the ventilation in the duct (terminals AB - AB or

7I – 8I)

the humidifier wets the floor below 1. the humidifier drain is blocked; 1. clean the drain in the bottom tank;

2. the supply water or overflow circuit has leaks; 2. check the entire water circuit;

3. the condensate drain pipe does not bring the 3. check the correct position of the condensate

water back to the supply tank; drain pipe in the supply tank;

4. the steam outlet pipe is not properly fastened to 4. check the fastening of the pipe clamps on the

the cylinder steam outlet

Tab. 10.4.1

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 79 80

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Carel UE035 User Manual Page 69