Service Manual Model BLF7451 UL Part Number 6909610100 IMPORTANT SAFETY INFORMATION: Always read this manual first before attempting to service this fireplace. For your safety, always comply with all warnings and safety instructions contained in this manual to prevent personal injury or property damage. Dimplex North America Limited 1367 Industrial Road Cambridge ON Canada N3H 4W3 1-888-346-7539 www.dimplex.
TABLE OF CONTENTS OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 EXPLODED PARTS DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 REPLACEMENT PARTS LIST. . . . . . . . . . . . .
OPERATION A Figure 1 C D E F by initial heating of internal heater parts and will not occur again. D & E. Thermostat Controls Adjusts the temperature set point to your individual requirements. Once the desired set temperature is reached the heater will turn off. The heater will cycle on and off to maintain the desired set temperature. The default temperature setting is 72°F (22°C).
(low). H. Sleep Timer The Sleep Timer can be set to automatically shut off the fireplace after a preset time (from 30 minutes to 8 hours). → To set the timer press the timer button on the remote, repeatedly, until the desired time is displayed. • The Floating DisplayTM will display the different times as it is adjusted. Once the timer has begun, pressing the button will display the time remaining before the unit turns Off.
EXPLODED PARTS DIAGRAM 1 7 14 15 3 16 18 6 10 12 2 5 8 9 4 11 REPLACEMENT PARTS LIST 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Element. . . . . . . . . . . . . . . . . . . . . . . . 2200510700RP Partially Reflective Glass Replacement Kit.9600750100RP Blower Assembly. . . . . . . . . . . . . . . . . 5300160300RP Front Glass . . . . . . . . . . . . . . . . . . . . . 6908730100RP Flicker Motor . . . . . . . . . . . . . . . . . . . . 2000220100RP Flicker Assembly . . . . . . . . . . . . . . . . .
WIRING DIAGRAM RELAY BOARD SWITCH BOARD LED STRIPS (RGB) - MEDIA M LED STRIPS (RGB) - FLAME BLOWER MOTOR ELEMENTS FLICKER MOTOR M THERMAL CUTOUT THERMISTOR AC/DC ADAPTER DISPLAY / CONTROL BOARD FLAME LED STRIPS (AMBER) LED DRIVER BOARDS 6 www.dimplex.
PREPARATION FOR SERVICE Figure 3 ! NOTE: All components are replaceable from the front of the fireplace while the unit is mounted on the wall, with the exception of replacement of the power cord. ! NOTE: If the power cord needs replacing or if the unit needs to be removed from the wall for any other reason please begin service by following the “PREPARATION FOR SERVICE” instructions, then move on to the section “INSTRUCTIONS FOR REMOVING FROM WALL”.
Figure 5 ! NOTE: If the surface you are using as a work area on is a finished surface that is prone to scratches (i.e. hardwood flooring), it is recommended that a protective barrier be used underneath, (i.e. cloth, cardboard, thick plastic). 5. Proceed to the instructions within this manual relating to the repair being performed - see Table of Contents for page number. 6. Once repair is complete, reassemble in the reverse order as above.
Figure 8 Figure 9 Controls Assembly Relay Board 12 LED Driver Board 6 LED Driver Board AC/DC Power Adapter Switch Board Retaining Screws bly (Figure 8), located at the top of the mirror on the right side of the unit. 2. Slide the controls assembly out toward the front of the unit. CAUTION: Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained. 3. Locate the switchboard (Figure 9). 4. Disconnect the wiring harness from the switchboard. 5.
tween the end of the connectors and the board to release the wires. 5. Remove the LED driver board off the plastic mounts by pinching the plastic mounting tabs with needle nose pliers. Pull the old board off. 6. Line up the holes on the driver board and gently press the new board onto the mounts. Make sure the board is secure. 7. Reassemble in the reverse order as above.
FLICKER ROD REPLACEMENT Figure 11 Media Tray Attachment Screws the new board onto the mounts. Make sure the board is secure. 8. Reassemble in the reverse order as above. CAUTION: When re-installing, be sure the wires are guided and tucked into the proper openings along the right side so they are not pinched and allows enough space to reinstall the panel.
Figure 12 Display/Control Board Retaining Brackets 1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together. 2. Remove the Partially Reflective Glass retaining brackets by removing the 3 screws on each brackets, located on the left and right side of the Partially Reflective Glass. (Figure 12) 3.
CAUTION: If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin. Tools required: Phillips head screwdriver. Needle nosed pliers. CAUTION: Follow “Preparation for Service” instructions before proceeding. 1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass.
THERMISTOR REPLACEMENT W ARNING: Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons. CAUTION: If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin. Tools required: Phillips head screwdriver Needle nosed pliers CAUTION: Follow “Preparation for Service” instructions before proceeding. 1.
TROUBLESHOOTING GUIDE PROBLEM CAUSE SOLUTION PART NUMBER General Circuit breaker trips or fuse Short in unit wiring. blows when unit is turned on Improper circuit current rating Trace wiring in unit.
PROBLEM CAUSE SOLUTION PART NUMBER Heater Heater is not turning on, but flame effect is still functioning Heater is turning off after a couple of minutes of operation Heater emits an odor Heater fan turns On but heater lacks heat Heating element is glowing red Heater fan runs continuously Improper operation Refer to Operation Section Loose wiring Trace wiring in unit Defective display/control board Replace the display/control board 3001640100RP Defective Heating Element Replace Heating Eleme
