Majestic · Gas fireplace

1 RED Conversion cover missing

Medium severity DVBL7 Signature Command

What the control is telling you

Command center shows a single red flash when the gas conversion cap is not seen on the control board.

Applies to: 300DVBLN/PSC7, 400DVBLN/PSC7, 500DVBLN/PSC7 (Signature Command)

Likely causes

NG/LP conversion cap not installed on the control board

Test and repair steps

Check that the NG/LP conversion cap is fitted on the control board
Check the control board connections

Other codes on the same units

1 BEEP Single beep (confirmation)
1 GREEN / 2 sec Pilot lockout - trial for ignition
1 RED / 10 sec Low battery
1 RED / 2 sec (until reset) Pressure switch failure (power vent only)
1 RED-GREEN / 2 sec Pilot lockout - flame loss
2 BEEPS Double beep (confirmation)
2 RED Spark fail
2 RED / 10 sec No or low thermopile power

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Source: Majestic DVBL7 Series Installation and Operating Instructions, p. 41, p. 48. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.