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Guardian / Garage door opener / Model guide

Guardian 600SL: identify the legacy manual and beep signals

Guardian's current support FAQ explicitly includes 600SL; its older manual also carries installer branding.

United States documentationSources checked 2026-09-11Independent Anderson reference

Match the model before choosing a document

Identifier: 600SL. Keep every letter and suffix on your product label when checking applicability.

The 6-13 owner reference identifies Guardian 600SL. Its GDS installer branding is historical document context and does not establish an Anderson affiliation.

Guardian associates 20 closing beeps with a photo-eye obstruction signal. Check for visible obstructions; repeated faults need service rather than a safety-system bypass.

Twelve beeps indicate abnormal motion or missing motion information and can have several causes. The beep count alone does not identify a failed replacement part.

Documented specifications

Values apply to the configuration named in each row. Follow the source for its exact scope.
Printed seriesExecutive SeriesSource: Guardian 600SL owner manual · Cover
Printed power label3/4 HPSource: Guardian 600SL owner manual · Cover
Motor typeDC motor with encoder shaftAssembly work is reserved for a qualified technician.Source: Guardian 600SL owner manual · Printed page 26 parts table; visually reviewed
Door scopeResidential sectional doorsSource: Guardian 600SL owner manual · Cover warning

Official documents & support

These links open the manufacturer’s document or support page. Manuals are hosted by their issuer.

Filter the documents listed below by model or document type. A match is not confirmation of your unit’s revision or installed accessories; read the scope note before using a document.

1 of 1 listed documents shown.

  • owner manual

    Exact 600SL cover and current Guardian support association verified; installer branding remains historical context.

    Models: 600SLenDocument: 6-13; GSOMU01A-1United States

Parts & related references

Match the exact model and source conditions before choosing a part. Conditional statements and explicit exclusions do not confirm a fit. Open a row for its exact pairing and source.

Shared scope and cautions for the following 8 references
Applies only within this source scope
  • Market: US
  • Model scope: 600SL
  • The reviewed 600SL edition specifies AC 120 V / 60 Hz on printed page 4. Applicability to other electrical editions is not established.
  • This is the exact 600SL manual with printed revision 6-13 and code GSOMU01A-1. Current stock, later revisions, other models and cross-part pairings are not established.

  • Guardian GUDT-021

    GUDT-021 identifies the header bracket in the cited 600SL manual. Exact model and source-edition limits apply.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-021 · Conditional

    GUDT-021 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-021 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 25 / printed page 25, Installation Parts table item 1, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-022

    GUDT-022 identifies the door bracket in the cited 600SL manual. Exact model and source-edition limits apply.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-022 · Conditional

    GUDT-022 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-022 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 25 / printed page 25, Installation Parts table item 2, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-023 installation hardware bag

    The Guardian 600SL manual (6-13; GSOMU01A-1) identifies GUDT-023 as the installation hardware bag. Its inventory has 11 groups; the printed quantities sum to 34 but exclude the unquantified handle/rope group. Match this exact edition and its nominal sizes. GUDT-023 and GUAT-023 are different identifiers.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-023 · Conditional

    GUDT-023 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-023 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 25 / printed page 25, Installation Parts table item 3, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-024

    GUDT-024 identifies the curved door arm in the cited 600SL manual. Exact model and source-edition limits apply.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-024 · Conditional

    GUDT-024 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-024 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 25 / printed page 25, Installation Parts table item 4, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-025

    GUDT-025 identifies the straight door arm in the cited 600SL manual. Exact model and source-edition limits apply.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-025 · Conditional

    GUDT-025 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-025 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 25 / printed page 25, Installation Parts table item 5, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-026

    GUDT-026 identifies the emergency-release handle with rope in the cited 600SL manual. Exact model and source-edition limits apply.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-026 · Conditional

    GUDT-026 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-026 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 25 / printed page 25, Installation Parts table item 6, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-201

    GUDT-201 identifies the photo-eye safety-system kit in the cited 600SL manual. Exact model and source-edition limits apply.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-201 · Conditional

    GUDT-201 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-201 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 25 / printed page 25, Accessories table item 1, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-206

    GUDT-206 identifies the remote control in the cited 600SL manual. Exact model and source-edition limits apply.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-206 · Conditional

    GUDT-206 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-206 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 25 / printed page 25, Accessories table item 2, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-208

    GUDT-208 identifies the door-control console in the cited 600SL manual. Exact model and source-edition limits apply.

    Exact pairing & sources for GUDT-208 · Conditional

    GUDT-208 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-208 to 600SL

    Applies only within this source scope
    • Market: US
    • Model scope: 600SL
    • The door-control console is marked optional in the inventory on printed page 3; it is not asserted to be included with every opener.
    • The reviewed 600SL edition specifies AC 120 V / 60 Hz on printed page 4. Applicability to other electrical editions is not established.
    • This is the exact 600SL manual with printed revision 6-13 and code GSOMU01A-1. Current stock, later revisions, other models and cross-part pairings are not established.
    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 25 / printed page 25, Accessories table item 4, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1
Shared scope and cautions for the following 9 references
Applies only within this source scope
  • Market: US
  • Model scope: 600SL
  • The assembly-parts table requires replacement by a qualified technician.
  • The reviewed 600SL edition specifies AC 120 V / 60 Hz on printed page 4. Applicability to other electrical editions is not established.
  • This is the exact 600SL manual with printed revision 6-13 and code GSOMU01A-1. Current stock, later revisions, other models and cross-part pairings are not established.

  • Guardian GUDT-301 chassis

    The Guardian 628 (09-17) and 600SL (6-13) manuals identify GUDT-301 as the chassis and require replacement by a qualified technician. The separate 628FCA (08-16) manual and October 2024 book listings retain their own scopes. Preserve the FCA suffix and the 600SL AC 120 V / 60 Hz edition condition.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-301 · Conditional

    GUDT-301 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-301 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 26 / printed page 26, Opener Assembly Parts table item 1, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-302 transformer

    The Guardian 628 (09-17) and 600SL (6-13) manuals identify GUDT-302 as the transformer and require replacement by a qualified technician. The October 2024 book separately lists it under 628. Keep the 600SL AC 120 V / 60 Hz manual-edition condition; it does not specify the transformer output rating.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-302 · Conditional

    GUDT-302 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-302 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 26 / printed page 26, Opener Assembly Parts table item 2, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-308 opener cover

    The Guardian 600SL manual (6-13; GSOMU01A-1) identifies GUDT-308 as the opener cover and requires replacement by a qualified technician. The October 2024 book separately lists it under 628. Keep the exact source scopes and the 600SL AC 120 V / 60 Hz edition condition.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-308 · Conditional

    GUDT-308 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-308 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 26 / printed page 26, Opener Assembly Parts table item 8, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-309 lamp plate

    The Guardian 628 (09-17) and 600SL (6-13) manuals identify GUDT-309 as the lamp plate and require replacement by a qualified technician. The separate 628FCA (08-16) manual and October 2024 book listings retain their own scopes. Preserve the FCA suffix and the 600SL AC 120 V / 60 Hz edition condition.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-309 · Conditional

    GUDT-309 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-309 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 26 / printed page 26, Opener Assembly Parts table item 9, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-310 light lens

    The 628 manual (09-17) calls GUDT-310 a light lens, the 600SL manual (6-13) calls it a lamp dome, and the 628FCA manual (08-16) calls it a light lens cover. The 628 and 600SL assembly tables require replacement by a qualified technician. Keep the separate manual and October 2024 book scopes when selecting a part.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-310 · Conditional

    GUDT-310 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-310 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 26 / printed page 26, Opener Assembly Parts table item 10, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-311 lamp lens clip

    The October 2024 book calls GUDT-311 a lamp lens clip under 615, a lamp dome clip under 628 and 628FCA, and a light lens clip under 715BBU and 728B. The 628 (09-17) and 600SL (6-13) manuals require replacement by a qualified technician. Match the exact source edition and configuration.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-311 · Conditional

    GUDT-311 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-311 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 26 / printed page 26, Opener Assembly Parts table item 11, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-312

    GUDT-312 identifies the logic board in the cited 600SL manual. Exact model and source-edition limits apply.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-312 · Conditional

    GUDT-312 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-312 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 26 / printed page 26, Opener Assembly Parts table item 3, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-313 DC motor with encoder shaft

    The 628 (09-17), 600SL (6-13) and 628FCA (08-16) manuals identify GUDT-313 as the DC motor with encoder shaft. The 628 and 600SL assembly tables require replacement by a qualified technician. Keep the separate October 2024 book wording; an included shaft does not establish a motor-to-encoder replacement relationship.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-313 · Conditional

    GUDT-313 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-313 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 26 / printed page 26, Opener Assembly Parts table item 4, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

  • Guardian GUDT-314 encoder module

    The October 2024 book identifies GUDT-314 as an encoder module; its 628 row says position encoder (Post 02/2012). This month boundary applies to that model-specific row and does not establish an exact calendar-day cutoff. Keep the separate manual editions, technician requirements and other model conditions.

    Read the shared scope and cautions above

    Exact pairing & sources for GUDT-314 · Conditional

    GUDT-314 is listed in the exact 600SL manual. The source revision and all stated conditions apply.

    From GUDT-314 to 600SL

    • Source 1: GuardianGuardian 600SL manual: reviewed parts and hardware inventory · PDF page 26 / printed page 26, Opener Assembly Parts table item 5, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1

Before applying these details

  • The legacy installer branding is not an Anderson job, endorsement or dealer relationship.
  • Historical part numbers and diagrams do not establish present replacement compatibility.
  • The underlying private-label contract, production boundaries and current parts availability remain unverified.

Sources & scope

  1. Guardian official manual indexGuardian Access & Door Hardware · checked 2026-09-11
  2. Guardian 600SL owner manualGuardian Access & Door Hardware · checked 2026-09-11 · 6-13; GSOMU01A-1
  3. Guardian model-specific beep signals and support FAQGuardian Access & Door Hardware · checked 2026-09-11

Anderson prepared this independent reference from the listed sources. It is not the manufacturer’s official support site, an installation inspection or a product test. Current stock, parts availability and warranty entitlement are not established by a listing.

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Troubleshooting guides explain observations; they do not identify a failed part from a model number.

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Garage Door Opener Repair: what an inspection or installation involves →

Share the equipment label and symptom. Availability is confirmed for the exact service address before scheduling. This reference does not establish a fault, part fitment, or repair availability for a particular model.

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  2. 2 Your location
  3. 3 Contact details

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What do you need help with?

Selected service: Opener repair. You can change this. Reason: Equipment: Guardian 600SL: identify the legacy manual and beep signals.

If the door is crooked or partly open, keep clear. Do not adjust springs or cables yourself.

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6 written Google reviews

Mama Bear

3 weeks ago

G
★★★★★
The service was fantastic- courteous, knowledgeable and honest.
Excerpt from Google review

Yehuda Robinov

a month ago

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★★★★★
Very very professional guys good jobs good service

adam ricker

3 months ago

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★★★★★
Great worker

David Avitan

3 months ago

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★★★★★
They replaced three garage door motors for me, and the service was excellent from start to finish.
Excerpt from Google review

Mary larson

4 months ago

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★★★★★
Very good service and very polite

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4 months ago

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★★★★★
Very good work, polite and flexible in scheduling appointments.

Reviews from Google. Rating and relative dates checked October 1, 2026. This is a dated snapshot, not a live feed.

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