Specifications

Installation & Maintenance Manual__________
54
15. Troubleshooting Table
problem cause solution
The controller does not
work.
1. power is not supplied;
2. external interrupt is off;
3. poor electrical connection;
4. blown fuse;
5. bad transformer;
1. check that the correct power has been
supplied;
2. turn on the external interrupt;
3. check that the connections to the controller
terminals are good;
4. check the condition of the fuses F1/F2;
5. verify that the secondary of the transformer is
supplying 24 Vac and fuse F3 is not blown.
The humidifier won't
start
1. ON/OFF contact open (jumper on terminals 7I-
8I);
2. the regulator/humidity controller or external
sensor are not connected properly;
3. broken sensor/humidistat;
4. the configuration parameters have been
improperly set;
5. the ventilation fan has gone out
1. close the remote ON/OFF (relay terminals 7I -
8I);
2. connect the external controller correctly;
3. check the external signal from these devices;
4. correctly reprogram the parameters;
5. reset the unit after the cause of the problem
has been eliminated;
The humidifier fills and
drains with water but will
not produce steam
1) Back-pressure during steam outlet
2) Broken water supply valve flow regulator
(possible leaks in the hydraulic circuit)
3) Defective water level control
4) Cylinder inlet filter blocked
5) Limestone scales in the fill tank
6) Broken drain valve
1) Check that the steam outlet valve is not
crimped or bent
2) Replace the drain valve
3) Clean or replace the water level control if
necessary
4) Clean the filter
5) Clean the fill tank
6a) Check the presence of 24 Vac on drain valve
6b) Replace the drain valve
The humidifier trips the
external interrupt
1. the overload protection is incorrectly sized;
2. short-circuit
1. make sure the interrupt is sized correctly; it
must be rated for a current of 1.5 times the
nominal current and voltage of the humidifier;
2. check with a meter to discover any short
circuits and correct them
The humidifier wets the
duct
1) The distributor is not installed correctly
2) The system is over-sized
3) Humidification is on when the duct fan is off
1) Check that the steam distributor has been
installed correctly. (see par. 9.3, page 21)
2) Decrease the steam production on the
humidifier control
3) Connect a trigger from the fan to terminals 7I -
8I of the On-Off remote (e.g. differential pressure
switch or flow switch contact)
The humidifier leaks
1) The humidifier drain is blocked
2) The hydraulic circuit is over-full or has
leaks
3) The condensation drain pipe does not feed
into the filler tank
4) The steam outlet pipe is not properly
attached to the cylinder
1) Clean the drain outlet in the bottom tank
2) Check the entire hydraulic circuit
3) Check the correct placement of the
condensation drain pipe in the fill tank.
4) Check the tightening of the pipe clamp on the
steam outlet
Loss of humidity in
space and no alarms
displayed on the
controller
1) Direct Spark Ignition module has shutdown
on internal error.
2) Blockage of intake and exhaust vent pipes
3) Loss of flame in burner
1) Turn the power to the unit off
2) Check for blockages in the intake and exhaust
vent pipes.
3) Lower humidity set point to its lowest setting,
for 30 seconds, and then reset to desired level