resideo Honeywell Home TrueSTEAM HM512 Use and care manual

TrueSTEAM
HM512, HM509, and HM506
TROUBLESHOOTING AND
PARTS REPLACEMENT GUIDE
1
SOLENOID VALVE REPLACEMENT
CAUTION: Ensure outside of tank
is cool before removing to prevent
possible injury.
1. Ensure the TrueSTEAM is empty, and unplug.
2. Shut off and disconnect the water line from the
bottom of the unit.
3. Unlock the red lever and disengage the tank from the
valve assembly and remove tank.
4. Remove TrueSTEAM from the mounting
bracket.
5. Remove the cover with a flathead or Torx
screwdriver.
6. Disconnect the valve wire plug from the circuit
board.
7. Using a flathead screwdriver, disengage the frame’s
backplate at the four locations.
8. Slide the valve out of the back of the frame, and ease
the wiring out of the TrueSTEAM frame.
9. Reassemble with the new solenoid valve, following
steps 28 in reverse order.
IN-LINE WATER FILTER
1. Turn off water supply at the source (i.e. saddle
valve)
2. Push in on the filter’s compression snap-lock fittings
where the 1/4-in. water line connects.
3. Pull out the water line as you are pushing in the snap-
locks.
4. Install the new water filter, ensuring directional water
flow is accurate per the filter label, by inserting the
water lines on either end of the filter.
5. Initiate a call for humidity by turning the humidistat
on.
6. Check the filter after 5 minutes of humidifier operation
to ensure no water leakage.
WATER TANK
1. Press and hold the EMPTY button for 3 seconds.
2. Water will drain from the tank and the CLEAN TANK
light will blink as it drains.
3. When the CLEAN TANK is on solid, the tank is
empty.
4. Turn the water valve arm to the UNLOCK position.
Grip the solenoid toggle valve and slide it back to
disengage.
5. Hold bottom of the tank while pressing down the
safety release button on the cover and slide the handle
forward.
6. The sediment screen is on the inside of the tank at the
bottom. Push the release button away from the tank
wall to disengage the screen.
7. Pull out and clean or replace the screen.
8. Clean tank and reattach.
WATER SENSOR ASSEMBLY
1. Unplug the TrueSTEAM.
2. Remove the cover with a flathead or Torx
screwdriver.
3. Disconnect the water sensor wire from the electric
circuit board.
4. Remove the Torx screw holding down the water sensor
assembly.
5. Lift the metal hinge and remove the sensor assembly
, .
6. Replace with the new sensor assembly and connect the
new wires to the assembly and the circuit board.
7. Reattach the cover.
8. Plug in the TrueSTEAM.
M28182
AB
REPLACEMENT PARTS
Part Part Number Fig.
Ref
10-foot Remote Hose and
Nozzle Kit
50024917001 1
20-foot Remote Hose and
Nozzle Kit
50024917002 1
Cover 50028004001 2
Duct Nozzle 50028003001 3
Remote Nozzles 50028001001 4
Mounting Bracket 50020012001 5
Solenoid Valve 50027997001 6
InLine Water Filter 50028044001 7
HM512/HM509 Water
Tank
50033181001 8
HM506 Water Tank 50033182001 9
Water Level Sensor
Assembly
50027998001 10
Saddle Valve 32001616001 11
Back-flow Water Valve 50030142001 12
Differential Pressure
Switch
50027910001 13
M28180A
1
2
3
4
5
6
7
8
9
10
11
12
13
69-2144

2
TROUBLESHOOTING
TrueSTEAM has internal diagnostics that monitor system
operation, maintenance schedules, and faults. If a system
fault is detected, the system will attempt to recover itself up to
five times in a 24 hour period. If unable to recover in that time,
the red Call Service LED light will activate.
If the TrueSTEAM Call Service light is red, a system fault has
occurred from which the humidifier can not recover by itself.
The table below shows the possible faults, along with steps to
fix TrueSTEAM.
If the red Call Service LED light is on, press/release the RESET
button. The red Call Service LED light will begin blinking in
a series that indicates what fault occurred. Refer to the table
below for the fault signified by the number of blinks that
occur.
Press/hold the RESET button to clear the Service Timer light.
Press and hold the EMPTY button for 3 seconds to drain the
tank.
No. of
Red
Light
Blinks
Fault
Description
Steps to Fix
To be Performed by
Professional HVAC
Technician Only
1 Water/
Heater
temperature
sensor
failed.
• Unplug TrueSTEAM and
remove cover.
• Check water sensor
connection to electronic
board.
• Reattach cover and plug
TrueSTEAM in.
• If fault reappears, press and
hold the EMPTY button
for 3 seconds and follow
tank cleaning steps in the
Professional Installation
Guide (692036).
• Reassemble tank and press
the RESET button.
• If fault returns, replace the
unit.
2 Water
sensors
failed.
• Unplug TrueSTEAM and
remove cover.
• Disconnect water level
sensor wiring, remove screw
and lift clamp.
Remove water sensor
assembly.
• Clean sensor probes using
warm soapy water so that
the metal is exposed. It
is OK to use steel wool or
brush.
• Reassemble the sensor
assembly in the unit,
reattach and secure cover.
• Plug unit back in and press
the RESET button.
• If fault reappears, replace
sensor assembly.
M28182
AB
No. of
Red
Light
Blinks
Fault
Description
Steps to Fix
To be Performed by
Professional HVAC
Technician Only
3 Failure to
fill tank with
water.
• Ensure inlet water is on.
• Check for leaks around
the tank seal and solenoid
valve.
• Turn off water supply and
replace in-line water filter.
• Press/hold RESET button
until the red Call Service
light turns off.
• If tank still fails to fill, press
and hold the EMPTY button
for 3 seconds (if unit fails to
drain, unplug unit and make
sure water in tank is cool).
• Follow tank cleaning
instructions in the
Professional Installation
Guide. Ensure you have
a firm grip of the tank
prior to releasing the
tank, especially if water is
present.
• Clear any excess debris
from the tank’s bottom
orifice to the solenoid valve.
• Reassemble tank and plug
unit back in. Press the
RESET button.
• If water still fails to flush
into the tank, replace the
solenoid valve.
4 Heating
element
overheated.
• Press and hold the EMPTY
button for 3 seconds.
• Follow tank cleaning
steps in the Professional
Installation Guide.
• Reassemble tank and press
the RESET button.
• If fault returns, replace with
applicable unit.
5 Input
voltage
insufficient.
• Problem most likely
due to voltage variation
from service provider,
or faulty wiring in the
home. If problem is due to
TrueSTEAM service alone,
the fault should correct
itself when voltage levels
return to normal.
• Press and hold the RESET
button until CALL SERVICE
light shuts off.
• Initiate a humidistat call for
humidity and monitor for
fault light to return.
• If fault returns, check the
line cord input voltage
before and during
humidistat call. Line
voltage should not drop
below 102Vrms to ensure
TrueSTEAM operates
properly.
No. of
Red
Light
Blinks
Fault
Description
Steps to Fix
To be Performed by
Professional HVAC
Technician Only
6 Water
overflow
sensed.
• Ensure drain hose is not
kinked or submerged in
water at the drain. Check
functionality of condensate
pump if used.
• Check for water coming
out of drain/overflow line.
If continuous water flow is
present, follow the cleaning
steps in the Professional
Installation Guide (69
2036).
• After cleaning, set
humidistat on and monitor
operation.
• If fault returns, unplug
TrueSTEAM.
• Loosen cover screw and
remove cover.
• Disconnect water level
sensor wiring and lift snap-
hinge clamp to remove
water sensor assembly. See
image on page 5.
• Clean probes using warm
soapy water so that the
metal is exposed. It is OK to
use steel wool or brush.
• Reassemble the sensor
assembly in the unit,
reattach and secure cover.
• Plug unit in, and press
RESET button.
• If fault reappears, replace
water sensor assembly and/
or solenoid valve.

3
No. of
Red
Light
Blinks
Fault
Description
Steps to Fix
To be Performed by
Professional HVAC
Technician Only
7 HVAC power
not present.
• Turn humidistat off.
• At thermostat, validate that
the FAN setting turns the
blower on. If not, check the
circuit breaker. If circuit is
tripped, reset or replace
fuse.
• If fault persists, unplug
TrueSTEAM and remove
cover.
• Validate proper TrueSTEAM
wiring to R and C terminals,
using installation guide
(692036).
• Ensure proper connection
quality of the wires.
• Inspect R and C wires at the
HVAC equipment board,
ensuring no breaks and
good connection if wire
nuts are used.
• Hook AC volt meter across R
and C to validate 2030VAC
is present. To measure, it may
be necessary to close furnace
interlock switch.
• Secure TrueSTEAM cover and
plug unit in. Press the RESET
button.
• If fault persists, recheck
wiring or replace unit.
Note: If using VisionPRO IAQ
to control TrueSTEAM, it is
not necessary to monitor
HVAC power. DIP 4 may
be turned on to disable
monitor.
811 The backup
weld monitor
input is
active when
the backup
heater relay
is off.
• Replace the TrueSTEAM
unit.
12 Tempera-
ture of the
electronic
circuit board
is too high.
• Ensure ventilation holes
in the cover are clear of
obstruction, and that 1 foot
of clearance is maintained
around the cover’s
ventilation holes.
• Ensure the TrueSTEAM is
installed in a location with
conditioned air 32°F (0°C)
to 104°F (40°C).
• Turn humidistat off and
allow time for electronic
board to cool. Unplugging
unit and removing cover will
facilitate this.
• Turn humidistat on and
press RESET button.
• Confirm humidity call starts
(HUMIDIFYING light turns
on).
• Allow unit to run and check
for steam leaks around tank
and ventilation holes.
• If steam is present, replace
TrueSTEAM.
No. of
Red
Light
Blinks
Fault
Description
Steps to Fix
To be Performed by
Professional HVAC
Technician Only
13 Tank failed
to drain.
• Water in tank may be hot
(>140ºF [60ºC]) and can
cause burns.
• Press and hold the EMPTY
button for 3 seconds.
• If unit fails to drain, turn
humidistat to OFF, or
unplug the humidifier and
wait for water in tank to
cool. Ensure tank water is
cool before proceeding.
• Once cool, follow tank
cleaning steps in the
Professional Installation
Guide (692036EFS).
• Reassemble tank and press
the RESET button.
• If fault persists, replace the
solenoid valve.
14 Heater
failed to boil
water.
• Press and hold EMPTY
button for 3 seconds, and
follow tank cleaning steps in
the Professional Installation
Guide.
• Reassemble tank and press
the RESET button.
• Initiate humidistat call.
• If fault returns, replace the
unit.
No. of
Red
Light
Blinks
Fault
Description
Steps to Fix
To be Performed by
Professional HVAC
Technician Only
15 No Airflow. • Unplug TrueSTEAM and
remove cover
• Validate proper wiring to
terminals R and C, using the
diagrams in the installation
guide (692036).
• Ensure proper connection
quality of the wires.
• Inspect R and C wires at the
HVAC equipment board,
ensuring no breaks and
good connection if wire
nuts are used.
• Hook AC volt meter across
airflow switch normally-
open (N.O.) terminal and R.
• Set thermostat FAN to off
and reduce system setpoint.
• Validate 0 VAC reading on
AC Volt Meter
• Set thermostat FAN to on.
• Once blower starts, validate
2030VAC reading on AC
volt meter.
• If voltage is not present,
check wiring and switch
functionality. Differential
pressure switch may require
a new install location (away
from duct bends, etc), or it
may need to be replaced.
• If voltage is present,
continue to troubleshoot
to validate proper airflow
monitoring.
• Keep AC volt meter across
airflow switch N.O. terminal
and R from HVAC unit.
• Turn humidistat off.
• Ensure DIP 4 and 5 are in
off (down) position.
• Secure TrueSTEAM cover
and plug in unit. Press the
RESET button.
• Set thermostat FAN to off
and reduce system set
point.
• Set humidistat call and
monitor device. (may take
1520 minutes)
• When sound of blower
clears, validate within 2
minutes that the AC volt
meter reads 2030VAC.
• If time for switch to change
state takes longer than 2
minutes, try a new install
location for the switch,
where state change is faster.

Resideo Technologies Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
69-2144—05 M.S. Rev. 04-20 | Printed in United States
www.resideo.com
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The Honeywell Home trademark is used under license from Honeywell International, Inc. This product is manufactured by Resideo Technologies, Inc. and its affiliates.
69-2144-05