Dometic Manual Refrigerator Diagnostic Service Manual - Diagnostic Flow Charts - Operation and Diagnosis

Oct 23, 2026

Diagnostic Service Manual for Dometic manual refrigerators, focusing on operation and troubleshooting across key failure modes. Includes diagnostic flow charts for no operation, 120 VAC operation, and no gas operation for models equipped with piezo igniter or automatic re-igniter. Provides step-by-step checks for power, switches, fuses, wiring, thermostat, AC heater, gas supply and pressure, flue and burner obstructions, continuity tests, electrode inspection, and replacement actions referenced by bulletin and page/paragraph references.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages53

Reading Time2 h 14 min

AccessFree to download

Diagnostic Service Manuals

Diagnostic Flow Charts

No Operation

120V AC Operation

No Gas Operation (Piezo Igniter)

No Gas Operation (Automatic Reigniter)

Operation and Diagnosis

The Absorption System

Vessel, Evaporator, Absorber, Boiler, Gas Temperature Exchanger

DOME TIC Corporate Office Warranty Department 2320 Industrial Parkway Elkhart, IN 46515 219-295-5228 205 E. Fenn St. LaGrange, IN 46761 219-463-2191 Technical Services Department 509 S. Poplar St. LaGrange, IN 46761 219-463-4858 8 / 89 Diagnostic Service Manuals NOTES: MANUAL REFRIGERATOR DIAGNOSTIC SERVICE ‘MANUAL Table of Contents Page Diagnostic Flow Charts No Operation . . . . . . . . . . . . . No 12OV AC Operation . . . . . . . . . No Gas Operation (Piezo Igniter) . . . . No Gas Operation (Automatic Reigniter) . . Operation and Diagnosis Dometic M a n u a l R efr ig e rat o rs . . . . . . . Glossary of Terms . . . . Service Bulletins . . . . . . . . . . . . D-4-l D-4-2 D-4-3 D-4-4 D-6- 1 D-8-l D-9-l MANUAL REFRIGERATOR DIAGNOSTIC FLOW CHART NO OPERATION A Check Switch Co rrect as Necessa ry C. OK Replace if Defective Check Fuse NOT OK Correct as Necessary D. ~~ ~~ Correct as Necessary NOT OK OK NOT OK E. OK , NOT OK Check wiring Correct as Necessary (Page D-6-20, Para. 66) Correct as Necessary Continuity Check Check Thermostat MANUAL REFRIGERATOR DIAGNOSTIC FLOW CHART VOLT AC OPERATION A. | 1. Check AC Power
2. Refrigerator Plugged in
3. Breaker
4. Coach Plug | | | --- | --- | | B. | OK | | | | | c . |
OK | | Check Thermostat | | Check Selector Switch NOT OK NOT OK D. OK Check 120 Volt Heater NOT OK Correct as Necessary Ohm’s Reading Bulletin \#28 (Page D-9-l 4, D-9-l 5) MANUAL REFRIGERATOR DIAGNOSTIC FLOW CHART NO GAS OPERATION - Models Equipped with Piezo igniter . Correct as Necessary (Page D-6-20, Para 66) Check Switch Check Gas Supply OK B. OK NOT I OK.C. NOT OK OK D. Correct as Necessary (Page D-6-13, Para. 37) NOT OK OK Check Thermostat Check Gas Pressure Check Flue & Burner Correct as Necessary No Obstructions NOT OK OK D-4-3 MANUAL REFRIGERATOR DIAGNOSTIC FLOW CHART NO GAS OPERATION - Models Equipped with Automatic Reigniter NOT OK OK Check Gas Supply A. Check Gas Pressure B. OK NOT I OK C. Check 12 Volt D.C. Supply ~~ ~~ Correct as Necessary NOT OK I OK OK E. Check Thermostat ~~ ~~~~ ~~ NOT OK Correct as Necessary Check for Continuity OK Clean Assembly & Orifice as Necessary NOT OK OK ,G. Replace Electrode Check Electrode (Page D-6-19, Para. 62) NOT OK NOTES: OPERATION & DIAGNOSIS OF DOMETIC MANUAL REFRIGERATORS (1) This is Dometic’s Manual Refrigeration Diagnosis and Troubleshooting program. In this program we will discuss the way an absorption cooling unit operates, and the diagnostic procedures used to troubleshoot the complete refrigerator system. (2) Before we begin extensive troubleshooting procedures on the cooling unit, let’s take a few minutes to see how it operates. THE ABSORPTION SYSTEM (3) The sealed combustion unit contains a mixture of ammonia, water and rust inhibiting agent. After this solution is introduced into the coils, this unit is pressurized with hydrogen gas. When this system is in operation, the ammonia vaporizes in the hydrogen atmosphere and absorbs heat from inside the refrigerator. VESSEL EVAPORATOR GAS TEMPERATURE EXCHANGER ABSORBER BOILER .

FAQs

What are the main diagnostic flow charts covered in the manual?

The manual provides flow charts for no operation, 120V AC operation, and no gas operation. It distinguishes gas models with piezo igniter and automatic re-igniter.

Which components are checked during the no operation diagnosis?

It guides checks of the switch, fuse, wiring and continuity, thermostat, and replacement steps when defective.

How does the absorption system operate, according to the manual?

The manual explains that sealed combustion uses a mixture introduced into coils, then is pressurized with hydrogen. During operation, ammonia vaporizes in the hydrogen atmosphere, absorbs heat inside the refrigerator, and transfers it through the absorption cycle components.

Oct 23, 2026

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