Dometic MANUAL REFRIGERATOR Manuel utilisateur

DOMETIC

Dometic

MANUAL REFRIGERATOR

DIAGNOSTIC SERVICE

MANUAL

The

Dometic

Corporation

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

OS1286

8/89

D-l

Diagnostic Service Manuals

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

NOTES:

D-2

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

MANUAL REFRIGERATOR

DIAGNOSTIC SERVICE ‘MANUAL

Table of Contents

Page

Diagnostic Flow Charts

No Operation . . . . . . . . . . . . .

12OV

AC Operation . . . . . . . . .

No Gas Operation (Piezo Igniter) . . . .

No Gas Operation (Automatic Reigniter)

Operation and Diagnosis

Dometic Manual Refrigerators.

Glossary of Terms

Service Bulletins

D-4-l

D-4-2

D-4-3

D-4-4

D-6-

D-8-l

D-9-l

D-3

Manual Compliments of

Northwest RV Supply

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MANUAL REFRIGERATOR

DIAGNOSTIC FLOW CHART

NO OPERATION

Check Supply Voltage

1. 110 Volt Plug

2. Wire Size

Correct as Necessary

Check Fuse Correct as Necessary

NOT OK Replace if Defective

.c.

Check wiring Correct as Necessary

NOT OK

Check Switch NOT OK

Correct as Necessary

(Page D-6-20,

Para.

66)

Check Thermostat , Correct as Necessary

NOT OK Continuity Check

D-4-l

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

MANUAL REFRIGERATOR

DIAGNOSTIC FLOW CHART

NO 120 VOLT AC OPERATION

1. Check AC Power

2. Refrigerator Plugged in

3. Breaker

4. Coach

Plug

Correct as Necessary

Check Selector Switch NOT OK

Correct as Necessary

(Page D-6-20,

Para.

66)

Check Thermostat Correct as Necessary

Continuity Check

NOT OK

Check 120 Volt Heater

NOT OK

Correct as Necessary

Ohm’s Reading

Bulletin

#28

(Page D-9-l 4, D-9-l 5)

D-4-2

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

MANUAL REFRIGERATOR

DIAGNOSTIC FLOW CHART

NO GAS OPERATION

Models Equipped with Piezo igniter

Check Gas Supply

Check Switch

NOT OK

Correct as Necessary

(Page D-6-20,

Para

66)

.C.

Check Thermostat

Check Gas Pressure

NOT OK

Correct as Necessary

Continuity Check

Correct as Necessary

(Page D-6-13,

Para.

37)

Check Flue

Burner

NOT OK

Correct as Necessary

No Obstructions

Check Piezo Resistance

NOT OK

Correct as Necessary

(Page D-6-l 8,

Para.

58)

Check Piezo Electrode

Replace Electrod

(Page D-6-18, 58)

NOT OK

Check Spark Gap Correct as Necessary

of Electrode to Burner NOT OK (Page D-6-19,

Para.

62)

D-4-3

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

MANUAL REFRIGERATOR

DIAGNOSTIC FLOW CHART

NO GAS OPERATION

Models Equipped with Automatic Reigniter

Check Gas Pressure

NOT OK

Correct as Necessary

(Page D-6-13,

Para

37)

Check Gas Supply

NOT OK

Correct as Necessary

(Page D-6-14,

Para.

40)

Check 12 Volt D.C.

Supply

Correct as Necessary

NOT OK

Check Switch

NOT OK

Correct as Necessary

(Page D-6-20,

Para.

66)

_E.

Check Thermostat

NOT OK

Correct as Necessary

Check for Continuity

Clean Assembly

Check Flue

Burner Orifice as Necessary

NOT OK

,G.

Check Electrode

Replace Electrode

(Page D-6-19,

Para.

62)

NOT OK

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

NOTES:

D-5

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

OPERATION

DIAGNOSIS

DOMETIC

MANUAL REFRIGERATORS

D-6-1

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

(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 a 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 am-

monia vaporizes in the hydrogen atmo-

sphere and absorbs heat from inside

the refrigerator.

EVAPORATOR

GAS

TEMPERATURE

EXCHANGER

ABSORBER

VESSEL

BOILER

D-6-2

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

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