GeneralAire EDMK4 Elite Steam - Manual (Page 21)

Elite Steam +030222075 Rev. 3.5 – July 2012 21
6. TROUBLE SHOOTING
Problem Causes Solutions
The humidifier does not turn on 1. No electrical power
2. On/off switch of the humidifier in position 0
(open)
3. Control connectors improperly connected
4. Blown fuses
5. Transformer failure
1. Check the safety devices upstream from the humidifier
and the presence of power
2. Close the switch on the panel: position I
3. Check that connectors are properly inserted in terminal
block
4. Check the condition of fuses
5. Check that the proper voltage is connected and turned on
The humidifier does not start
operation
1. Remote ON/OFF contact open
2. The humidistat has not been connected
correctly
3. Humidistat failure
4. Control signal not compatible with the type set
5. Value measured by the sensor/s higher than
the corresponding set point
1. Close ON/OFF contacts
2. Check the external connection
3. Replace the humidistat
The humidifier fills with water
without producing steam
1. High steam back pressure
2. Fill valve strainer clogged
3. Mineral in the fill cup
4. Drain pump valve leaking
1. Check that the steam hose is not kinked or sagging,
trapping condensate
2. Clean the fill valve strainer
3. Clean the fill cup
4. Check for voltage at the drain pump valve and/or drain
pump replacement
The humidifier wets the duct 1. The distributor is not installed correctly (too
near the top of the duct or the condensate return
is blocked)
2.Air flow rate is too low
3.Humidifier active when the fan in the duct is off
1. Check that the steam distributor is installed correctly
2. Increase air flow in duct or decrease PO maximum steam
production setting
3. Check the connection of the device (flow switch or
differential pressure switch) controlling the humidifier to the
ventilation in the duct
The humidifier wets the floor
below
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 drain pan
4. The steam hose is not properly fastened to the
cylinder
1. Clean the drain assembly and pan
2. Check the entire water circuit
3. Check the correct position of the condensate drain hose
in the drain pan
4. Check the fastening of the hose clamps on the steam
outlet
Tab. 6.a
Problem Causes Solutions
Water in the cylinder turns
black
1. Minerals in the cylinder have over-
concentrated and are deteriorating the
electrodes.
1. Check for sags & kinks that could trap condensate in the
steam hoses that could cause a back pressure on the
cylinder.
2. Check the duct static pressure.
3. Check the fill valve and inlet strainer.
4. Check the drain pump operation.
5. Correct installation problems and replace cylinder.
Heavy arcing occurs within
hours of startup
1. The feed water contains large amounts of Iron,
Copper or other conductive contaminants.
1. Contact the factory for an optional drain timer to force
additional drains to control the minerals.
2. If you are using a softener. Discontinue use.
3. Check the electrodes in the cylinder to be sure they were
not damaged in shipping.
Humidifier continuously fills
and drains without producing
steam
1. Mineral has bridged between the electrodes.
2. There is back pressure from the steam hoses
or duct.
3. The flow regulator in the fill valve is broken or
out of place.
4. Water conductivity is very high.
5. Water is foaming excessively.
1. Clean or replace the cylinder.
2. Check the steam hoses for kinks or gullies that might be
trapping condensate.
3. Replace the fill valve.
4. Consider using a mix of demineralized water with raw
water.
5. Check cylinder - replace if exhausted. If feed water
contains silica or nitrates, install a 1 micron water filter.
Tab. 6.b