Dometic RM 2801 Service Manual download pdf (Page 72)

Bulletin

#46

continued

MAIN SWITCH

ON/OFF SWITCH

RM1303, 763, 663

Models 1303, 763 663:

The switch operates on 12 volts from the circuit board.

In normal operation, the switch

should travel only to the ON and OFF positions.

A switch that travels more than this

has been installed incorrectly or the installation nut that holds the switch in place has

worked loose. If the switch is the suspected point of failure, check the connecting

ribbon cable for visible cuts or shorts.

The switch can be checked for continuity

between terminals

and 2, 4 and 5, 6 and

in the “ON” position; and 2 and 3, 5 and 7

in the “OFF” position.

Remember to disconnect the switch from the AES circuit board

when checking for continuity.

Models 3800, 3600 3500:

Check for continuity only between terminals 1

and 2, 3 and 4,

and 10 using the low

scale (RX-l) on an ohm meter,

with the switch in the ON position and continuity only

between terminals 1

and 3, 5 and 6 in the OFF position. Also, be sure to disconnect

from the AES circuit board and check continuity from the plug at the AES circuit board

end. This will check the ribbon cable as well as the switch.

ELECTRODE

FIG. 7

Spark Cap = 3/16" (Allen wrench

used for gas pressure

test fitting may be

used as

feeler gauge)

The electrode serves two basic functions on the AES refrigerator. It is used as a

contact point to transmit the spark from the igniter to the burner.

The electrode also

acts to measure the resistance between it and the burner and sends this information to

the igniter module. When the resistance is high, the igniter starts sparking and when it

is low the igniter stops sparking.

Because of this, the electrode position is extremely

important. If the electrode is too close to the burner the resistance is low and the

system will think the burner is lit

especially true with high humidity.

In this

situation, no spark will occur.

Some atmospheric conditions such as very high humidity

and/or coastal salt air may necessitate a wider than minimum gap; therefore, the optimum

gap should be 3/16" or 5 mm.

If the gap from the electrode to the burner is too large,

the resistance will be too high and the igniter will continue to spark even though the

flame is lit.

With this situation, the flashing red indicator light will come on in

approximately 3 minutes.

A-9-4

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

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