| Door will not open | Note the closed position, visible operator indicator, and whether a control message appeared during ordinary use. | Door mechanics, the operator, a safety input, power, or an enabled sequence may require assessment. | Do not force, lift, or repeatedly command the door; request service. |
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| Door stops halfway | Report the approximate stopping position and whether it was opening or closing. | Several track, hardware, balance, operator, or safety-device conditions can produce this symptom. | Leave the door in its present safe state under facility procedure and do not reproduce the stop. |
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| Door reverses | Report whether reversal occurred during ordinary closing and any indicator visible from the floor. | A monitored safety input, operator setting, obstruction, or mechanical resistance may be involved. | Do not bypass a safety device or repeatedly cycle the opening. |
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| Door travels crooked | From clear floor space, note which lower corner appears higher and the position where it was noticed. | Cable, drum, roller, track, section, or attachment condition may need inspection. | Keep clear of the opening and do not touch cables or attempt to level the door. |
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| Section is visibly damaged | Describe the location, crease, puncture, separation, or displaced edge. | The section and connected hinges, rollers, track, or attachments may be affected. | Do not push the panel back into shape or cycle the door to check clearance. |
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| Roller or track appears displaced | Note the side and height from a distant floor position. | Impact, hardware movement, or section alignment are possible assessment categories; the observation does not prove a cause. | Do not guide the roller, loosen brackets, or stand beneath the door. |
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| Cable looks slack or frayed | Only from a safe distance, report the side and the door's current position. | The lifting and balance system requires controlled inspection. | Do not touch the cable, drum, or spring and do not operate the door. |
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| Gap around the closed door | Note whether the gap is at the bottom, side, top, or between sections. | Weatherstripping, section alignment, track position, floor condition, or impact damage may be involved. | Report the location and whether light, air, water, or ice is visible. |
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| Cold-weather binding | Report visible threshold ice or whether the change appeared during cold conditions. | Ice, seals, alignment, or another door condition may contribute, but temperature alone is not a diagnosis. | Do not force or repeatedly cycle the door; control the opening under site procedure. |
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| Unusual noise was reported | Describe the sound and where it seemed to originate during the last ordinary cycle. | Rollers, hinges, track, sections, balance hardware, or the operator may need assessment. | Do not run another cycle just to capture the noise. |
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