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TROUBLESHOOTING
PLEASE READ THIS SECTION BEFORE
REFERENCING SPECIFIC DIAGNOSTIC
MESSAGES.
1. Ensure the installation detail conforms with the
recommendations contained in the Installation
section of this manual.
2. Understanding the Principle of Operation is an
asset when troubleshooting. A basic description
is provided in the section titled OPERATION. For
a more detailed understanding please contact
your NORTEC representative.
3. When contacting your local representative or
NORTEC for troubleshooting assistance, please
ensure the serial number has been obtained for
reference purposes.
4. Whenever the troubleshooting steps indicate a
problem with the main PCB, first check all
connections at the main control board.
-11-
DIAGNOSTIC PROCEDURES - TROUBLESHOOTING
The RESDELUX controller provides a number of messages to simplify troubleshooting procedures. The following
table presents fault messages displayed by the controller, their meaning and possible corrective actions. Refer to the
following section for detailed information about terms used in the table.
Table #4 - Troubleshooting Guide
Unit Status Lamp
Symptom Corrective actions
Yellow Green
On On Maximum water level
inside cylinder.
This usually happens on initial start-up after replacing the cylinder
(normal).
Water is concentrated with minerals inside the cylinder.
Let unit run, yellow light will disappear when the unit is at full
output. This may take a day or two.
Off Off No power to the
board.
Check for main power supply fault.
Turn power switch to ‘Drain’ position. If drain valve is activated
(sound of solenoid), check connection to the board or board itself.
When no sound present, check fuse (replace with 1.5A if needed),
transformer (voltage should be present between fuse holder and
ground screw).
1 flash
sequence
Off Over current.
Operating amperage
exceeded 130% of
rated amps. Water is
drained from the
cylinder (drain valve
on for 10 min.).
Check drain valve operation, drain time, possible drain restrictions.
Check if fill valve leaks (not holding supply water).
Back pressure may also cause very conductive water conditions.
Was the humidifier short cycling?
Check for short cycling.
2 flashes in
sequence
Off No current
detection for 30
minutes with
continuous call for
humidity.
Check water level in the cylinder - should be more than ¼ full. If not
check fill rate, 24 VAC voltage on fill valve terminals (unit must be
on with call for humidity - green light steady on). Verify fresh water
supply to the humidifier. Leaking drain valve can be at fault
(minerals blocking the plunger).
If cylinder is more than ¼ full, check primary power, connections to
the cylinder, continuity of wires to cylinder.
Are power wires connected to proper terminals on the cylinder?
(Color coding)
Possibly wrong cylinder type.
Low water conductivity.
4 flashes in
sequence
Off End of cylinder life -
change cylinder.
Check water level in the cylinder, should be about ¾ full.
Check for foaming if water level lower or cylinder life shorter than
expected.
Change cylinder, clean drain valve.