Dimplex Optimyst DFI400LH User manual

Service Manual
Model Part Number
DFI400LH 6909050141
DFI400RH 6909050142
DFI600LH 6909050161
7400750000R00
In keeping with our policy of continuous product development, we reserve the right to make changes without notice.
© 2013 Dimplex North America Limited
Dimplex North America Limited
1367 Industrial Road Cambridge ON Canada N1R 7G8
1-888-346-7539 www.dimplex.com
REV PCN DATE
00 - 11-OCT-13
IMPORTANT SAFETY INFORMATION: Always read this manual rst before attempting to service this cassette. For your
safety, always comply with all warnings and safety instructions contained in this manual to prevent personal injury or prop-
erty damage.

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Always use a qualied technician or service agency to repair this cassette.
!NOTE: Procedures and techniques that are considered important enough to emphasize.
CAUTION: Procedures and techniques which, if not carefully followed, will result in damage to the equipment.
WARNING: Procedures and techniques which, if not carefully followed, will expose the user to the risk of re, serious
injury, or death.
Operation ...........................................................3
Maintenance.........................................................4
Exploded Parts Diagram...............................................5
Replacement Parts List................................................5
Wiring Diagram ......................................................6
Remote Control Receiver Replacement ..................................7
Power Board Replacement ............................................7
Switch Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermostat Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Potentiometer Replacement ...........................................8
Power Cord / Receptacle Replacement...................................8
Fuse / Fuse Assembly Replacement .....................................8
Light Assembly Replacement ..........................................9
Fan Assembly Replacement............................................9
Troubleshooting Guide ...............................................10
TABLE OF CONTENTS

3
D. Thermostat Control*
To adjust the temperature to your individual requirements,
turn the thermostat control clockwise all the way to turn on
the heater. When the room reaches the desired tempera-
ture, turn the thermostat knob counter-clockwise until you
hear a click. Leave thermostat in this position to maintain
the room temperature at this setting. For additional heat,
turn clockwise until you hear the click again and the heater
will turn on.
* Only applicable when the Dimplex heater has been
plugged into the receptacle.
Remote Control
The On/Off Switch must be in the ‘ON’ ( I ) position in order
for the remote control to operate. There are 3 buttons on
the remote control. (Figure 2)
!NOTE: To operate correctly, the remote control must be
pointed towards the remote control sensor.
The remote control functions are as follows:
Press once to turn on Flame effect only. This will be
indicated by one beep.
Press once to turn on heat and Flame effect. This will
be indicated by two beeps.
Standby - This will be indicated by one beep.
!NOTE: Once the mist has been activated, the unit will
have to be turned Off, using either the switches on the unit,
or the standby button on the remote control, then back on
to return to ame effect operation only.
Battery Replacement
To replace the battery:
1. Slide battery cover open on the remote control (Figure
2).
2. Install two 1.5 Volt (AAA) batteries in the battery holder.
3. Close the battery cover.
Battery must be recycled or disposed of properly.
Check with your Local Authority or Retailer for recy-
cling advice in your area.
OPERATION
Figure 1
CAUTION: During operation ensure that the receptacle
cord is positioned so that the face is perpendicular to the
oor.
!NOTE: Always ensure that the appliance is in an upright
position before operating the unit.
!NOTE: When the cassette is used in an environment
where background noise is very low, it may be possible to
hear a sound which is related to the operation of the ame
effect. This is normal and should not be a cause for con-
cern.
The manual controls for the cassette are located on the top
of the unit, below the control cover. (Figure 1)
A. On/Off Switch
Supplies power to the cassette.
B. Mode Selector Switch
Press once to turn on the ame effect. This will be indicated
by an audible “beep”. Although the lights turn on immedi-
ately it will take 30 seconds before the ame effect starts.
• Press again to give ame effect and heat*. This will be
indicated by two “beeps”.
• Press again to return to ame effect only. This will be
indicated by one “beep”.
• Press to put re in to standby mode. This will be
indicated by one “beep”.
C. Flame Intensity Control
Adjusts the intensity of the ame effect when the heater
has been activated.
Turning the control knob clockwise to decrease the inten-
sity of the ame effect. Turning the control knob counter-
clockwise will increase the ame effect.
!NOTE: Give the ame generator some time to react to
changes you may make on the ame control knob.
!NOTE: When the water tank is empty the unit will turn
off after 30 seconds. See instructions under Maintenance
Section for relling tank. When this procedure is complete,
the main lamps will illuminate but it will take 30 seconds
before the ames return.
Figure 2
BA
C
D
Remote Control
Sensor
Battery Cover
Standby
Button
Flame
Button
Heat
Button

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MAINTENANCE
WARNING: Disconnect power before attempting any
maintenance or cleaning to reduce the risk of re, elec-
tric shock or damage to persons.
Filling the water tank
When the water tank is empty, the ame shuts off and you
will hear 2 audible beeps, follow these steps.
CAUTION: Allow at least ve minutes for components to
cool before disassembling the unit to rell.
1. Turn the On/Off switch to the off position (0) (Figure 1)
2. Gently remove the media tray and media (if applicable)
and place them carefully on the ground.
3. Remove the rell container by lifting upwards and
outwards.
4. Rell the container with tap water.
!NOTE: Normal tap water can be used in the Optimyst®
as long as the tap water is not considered to be hard water.
In the event your tap water is hard, you may use softened
water or distilled water with 1/8 tsp of salt (0.5 mL) added to
the water reservoir. (The addition of additional salt should
only be when you notice that the unit is not producing mist
as expected.)
5. Screw the cap back on, do not overtighten.
6. Return the rell container to the water tank.
7. Gently place the media tray and media (if applicable)
back into position.
8. Turn the On/Off switch to the off position (I). (Figure 1)
If you do not intend on using the unit for longer than 2
weeks, empty and drain the unit of water, and dry all of the
water containing components.
Replacing the Light bulbs
If a large amount of the ame appears grey or colourless it
may be that one or more of the light bulbs have burnt out.
CAUTION: Allow at least 5 minutes for light bulbs to
cool before touching bulbs to avoid accidental burning of
skin.
Light bulb requirement: 45W, 12VAC halogen bulbs type
MR 16. Contact Dimplex Technical Service at 1-888-346-
7539 for replacement bulbs.
1. Leaving the ame effect on, remove the media (if ap-
plicable), tray and water tank (Figure 3) and lift out the
top cover.
2. View the lamps from a distance in front of the re and
observe which lamp needs to be changed.
3. Turn the unit off, and unplug the cassette.
4. Leave the appliance for 5 minutes to allow the lamps to
cool down before removing them.
5. Remove the water tank and top cover (Figure 3) by lift-
ing upwards and place in a sink.
6. Remove the defective bulb, by gently lifting vertically
and disengaging the pins from the lamp holder.
7. Carefully insert the two pins of the new bulb into the
two holes in the lamp holder. Push lamp rmly in place.
8. Gently place the media tray and media (if applicable)
back into position.
Cleaning
It is recommended that all of the components that contain
water are cleaned with soap and water on a biweekly ba-
sis. A small brush has been included to assist in cleaning
difcult items/areas, i.e. the transducer.
CAUTION: Do not put plastic components in the dish-
washer.
Filter Cleaning
The air lter can be removed and gently rinsed with water
to clean and dried on a towel before reinstalling.
!NOTE: Replace the lter so that the course black lter is
facing the front of the cassette.
Surface Cleaning
Use a warm damp cloth only to clean surfaces of the cas-
sette. Do not use abrasive cleaners.
!NOTE: If you need to move the unit ensure that all of
the components that contain water have been emptied be-
fore relocating.
Servicing
Except for installation and cleaning described in this manu-
al, an authorized service representative should perform any
other servicing.
Figure 3
Top
Cover
Transducer
Emitter
Wire Slot
Retaining
Tab
Fan
Housing
Water Tank

5
EXPLODED PARTS DIAGRAM
REPLACEMENT PARTS LIST
1. Remote Control..................9600385600RP
2. Remote Control Receiver ..........9600580100RP
3. Rock Media (DFI400RH). . . . . . . . . . . 9600650100RP
4. Media Tray (DFI400RH) ...........9600710100RP
5. Log Set Assembly - DFI400LH ......9600720100RP
- DFI600LH ......9600730100RP
6. Light Holder Assembly ............9600610200RP
7. Removable Rell Container with Cap 0441440100RP
8. Cap for Rell Container. . . . . . . . . . . . 0441440300RP
9. Top Cover Assembly ..............9600670100RP
10. Water Tank . . . . . . . . . . . . . . . . . . . . . 0441380100RP
11. Fan Assembly . . . . . . . . . . . . . . . . . . . 5300300100RP
12. Fan Housing Assembly . . . . . . . . . . . . 9600540100RP
13. Fan Filter. . . . . . . . . . . . . . . . . . . . . . . 8600300100RP
14. Transducer .....................3800040100RP
15. Power Cord . . . . . . . . . . . . . . . . . . . . . 9600740100RP
16. Receptacle Cord . . . . . . . . . . . . . . . . . 9600780100RP
17. On/Off Switch ...................9600383500RP
18. 3-Position Switch ................9600383600RP
19. Transformers. . . . . . . . . . . . . . . . . . . . 9600690100RP
20. Potentiometer ...................9600640100RP
21. Thermostat Assembly . . . . . . . . . . . . . 9600620100RP
22. Control Knob . . . . . . . . . . . . . . . . . . . . 9600630200RP
23. Power Board . . . . . . . . . . . . . . . . . . . . 9600590100RP
24. IR Receiver with Lens . . . . . . . . . . . . . 9600600200RP
25. Light Bulbs (Package of 4) ................RB400
26. Fuse Holder ....................9600790100RP
27. Fuse ..........................9600790200RP
6
1
2
3
4
57
89
10
11
12
13
14
15
16
17
18
19
20 21
27
23
26
24
25

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WIRING DIAGRAM

7
REMOTE CONTROL RECEIVER
REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Remove the 4 screws around the remote control re-
ceiver attaching it to the unit.
4. Transfer the wire connectors from the terminals on the
original board to the same location on the replacement
board.
!NOTE: Use a at head screwdriver to gently pry
between the end of the connector and the remote control
receiver to release the wires.
5. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
POWER BOARD REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Remove the 4 screws around the power board attach-
ing it to the unit.
4. Transfer the wire connectors from the terminals on the
original board to the same location on the replacement
board.
!NOTE: Use a at head screwdriver to gently pry
between the end of the connector and the remote control
receiver to release the wires.
5. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
TRANSFORMER REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
Figure 4
Front Grille
Transformers
Power Board
Remote Control
Receiver
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Remove the screws that secure the transformer to the
unit.
4. Transfer the wire connectors from the terminals on the
original board to the same location on the replacement
board.
!NOTE: Use a at head screwdriver to gently pry
between the end of the connector and the remote control
receiver to release the wires.
5. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
SWITCH REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Locate the defective switch and disconnect the wiring
connections noting their original locations.
!NOTE: A at head screwdriver can be used to gently
pry between the end of the connector and the switch to
release the wires.
4. Depress the retainer clips on the rear of the switch and

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push the switch out through the opening.
5. Properly orient and insert the new switch and connect
all of the wiring.
6. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
THERMOSTAT REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Remove the knob off of the thermostat, by gently lifting
the bottom forward and pulling down.
4. Depress the retainer clips on either side of the thermo-
stat to slide it out of the assembly.
5. Disconnect the wiring connections noting their original
locations.
!NOTE: A at head screwdriver can be used to gently
pry between the end of the connector and the switch to
release the wires.
6. Install the knob onto the new thermostat and slide the
thermostat back into the assembly ensuring that it has
“clicked” into place.
7. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
POTENTIOMETER REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
3/8” (10mm) Wrench
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Turn the unit so that the underside of the potentiometer
can be seen.
4. Loosen the securing nut, to allow the potentiometers
slide out.
5. Disconnect the wiring connections noting their original
locations.
!NOTE: A at head screwdriver can be used to gently
pry between the end of the connector and the switch to
release the wires.
6. Slide the potentiometer back into the assembly and
tighten the securing nut.
7. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
POWER CORD / RECEPTACLE
REPLACEMENT
Tools Required: Philips head screwdriver
Flat head screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Locate the cord and disconnect the wiring connections
noting their original locations.
!NOTE: A at head screwdriver can be used to gently
pry between the end of the connector and the switch to
release the wires.
4. With needle nose pliers, grasp the cord strain relief
grommet from inside the back of the bottom panel and
push while twisting to remove.
5. Install the new cord.
6. Reassemble in the reverse order as above.
FUSE / FUSE ASSEMBLY REPLACEMENT
Tools Required: Flat head screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Locate the fuse assembly located on the bottom the
unit and using the at head screwdriver remove the
assembly.
4. Replace the fuse and the fuse assembly.
!NOTE: The unit will not need to be disassembled to
replace the fuse only.
5. Reassemble in the reverse order as above.

9
LIGHT ASSEMBLY REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Disassemble the sump components. (Figure 3)
3. With the unit turned upside down, remove the 2 screws
that hold the light assembly to the unit. (Figure 5)
4. Remove the light assembly and replace with the new
light assembly.
5. Reattach the wire onto the new light assembly.
6. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
FAN ASSEMBLY REPLACEMENT
Fan Motor and Fan Housing
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Disassemble the sump components. (Figure 3)
3. Remove the 3 screws that hold the cover onto the fan
housing. (Figure 6)
4. Remove the fan motor out of the housing and discon-
nect the wiring connection located near the bottom of
the housing.
5. If replacing only the motor, attach new motor and reas-
semble the remainder of the cassette in revers order
from the instructions above.
• If replacing the housing, remove the 3 screws attaching
the base to the cassette. (Figure 6)
6. Attach new fan housing base to the cassette.
7. Transfer the lter from the old housing to the new hous-
ing.
8. Reinstall the fan motor and reconnect the wire.
9. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
Figure 5
Figure 6

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PROBLEM CAUSE SOLUTION
Appearance
Cassette does not turn on in
Manual Mode
Improper operation Refer to Operation Section
No incoming power from the electrical wall
socket
Check Fuse/Breaker Panel
Power adapter set not connected properly Refer to installation instructions for wiring
instructions.
Defective Remote Control Receiver Replace Remote Control Receiver.
Cassette does not turn on in Re-
mote Mode
Improper operation Refer to Operation Section
Remote Control not working Install new battery into the Remote Control.
Defective Remote Control Receiver Replace Remote Control Receiver.
Defective IR Remote Control Sensor Replace the IR Sensor
Mist is not coming out Not enough water in the unit Fill unit with water
Water in unit is too cold Allow water to warm to room temperature.
If using distilled or reverse osmosis water, unit
will not produce a consistent mist
Add 1/8 tsp of table salt to water reservoir to
introduce electrolytes, only repeat when mist is
not being produced correctly
Check that the fan is operating correctly Replace fan assembly
Ensure that the air lter is clean and dry
Cord is located over emitter on transducer Relocate cord so that mist is free to rise off of
transducer.
Defective Transducer Replace Transducer
Mist is not coming out and the red
light by the transducer is not on
The cord from the power board is not working Ensure that the cord is not pinched.
Ensure that the cord is fully inserted into the
connection on the power board.
Mist is coming out fast Filter is missing off of Fan Housing Replace Fan Filter
Mist does not appear to be com-
ing out evenly
Unit is not level Level unit
Media is blocking air ow Rearrange media
A light bulb is burnt out Replace light bulb
Heater
Heater is not turning off Improper Operation Refer to Operation Section
Defective Thermostat Replace Thermostat
Heater is not turning on Improper Operation Refer to Operation Section
Defective Thermostat Replace Thermostat
Heater has blown fuse in cord Replace Fuse
Heater is turning off after a couple
of minutes of operation
Build up of dirt/dust in Heater Assembly Ensure that exterior intake louvers and housing
cavity are free of dirt/dust.
Defective Heater Assembly Replace Heater Assembly
Heater emits an odor Normal Operation Normal operation is when the heater emits an
odor for a brief period after the heater is initially
turned on. The heater is burning off any dust
accumulated during manufacturing or operation.
Defective Heater Assembly Replace Heater Assembly
TROUBLESHOOTING GUIDE