Dometic RM 2801 Service Manual download pdf (Page 61)

AES Refrigerator GLOSSARY OF TERMS continued

SWITCH/MODE INDICATOR BOARD (3rd Generation)

A more sophisticated version of the

switch board. This switch assembly has three (3) separate pushbutton switches as well as the

On/Off main slide switch. The three (3) pushbutton switches are marked

and

When the main switch is turned on, the 3rd generation refrigerators will

automatically select the mode, operating very similar to the 1st and 2nd generation series.

This mode of operation will be indicated by the button illuminating green. If AC and LP gas

only is desired, the pushbutton may be depressed. pushbutton will illuminate

to indicate this mode selection. If gas only operation is desired, the q pushbutton may be

depressed. Regardless of what heat source is available, the refrigerator at this point will only

operate on LP gas. Again, the pushbutton will illuminate to indicate this mode selection.

If a flame failure occurs, the L.E.D. assembly will illuminate orange at the lens

This assembly also provides useful information to indicate what mode of operation the

electronic circuitry has selected. On the switch panel there are four (4) indication lenses

marked q , q , q andl.

enever

it is desired to determine what mode of operation the

AES has selected, the small mode indication button q is depressed. While this button is

depressed and the AES circuit has selected the

11OV

AC mode, will illuminate

yellow. If refrigerator has selected 12V DC operation the q lens will illuminate while mode

indication is depressed. The will illuminate yellow if system is in the approximate 25

minute delay cycle. Finally, if gas selection has been made, the q lens will illuminate.

TERMINAL BLOCK (MAIN) - The AES utilizes a three (3) section terminal block instead of the

two (2) section assembly found on 3-way manually controlled refrigerators. The block houses

connections marked positive (+), negative (-) and ignition lock (ign. lock). A wire of proper gauge

is connected from the positive lug on the battery to the positive connection on the terminal block.

A similar wire, again of proper gauge, is connected from the negative lug on the battery to the

negative connection on the terminal block. This gives the printed circuit board a power feed to

automatically select the proper heat sources and handles the amperage demands when the

refrigerator is operating on 12V DC cooling mode. A minimum 16 gauge wire is connected from

the run side of the ignition switch to the ignition lock connection on the terminal block. This wire

connection will allow the refrigerator to switch to the

12V

DC cooling mode when ignition is

turned to the “ON” position. When the ignition key is turned “OFF” (directly after 12V operation)

the refrigerator will go into an approximate 25 minute delay cycle (see Delay Cycle).

THERMOCOUPLE

A component connected to solenoid valve, extending above the burner assembly

so tip is in the path of flame when refrigerator is operating on LP gas mode. When heat is

generated at the tip, the thermocouple will produce a small amount of DC voltage that will keep

the solenoid mechanism open to sustain flame. If the flame should blow out and igniter cannot

relight flame within a few seconds, the tip of the thermocouple will cool, which will interrupt the

production of voltage that, in turn, will allow the mechanism of the solenoid to close. This will

prevent LP gas from accumulating at the burner. The thermocouples used will produce from 14 -

30 millivolts DC in normal operation.

A-7-5

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

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