Dometic RM 2801 Service Manual download pdf (Page 28)

(70)

TAG LINE ENERGIZED

Secondly, suppose a customer has a properly

wired RM3801 in a motor home that is

equipped with a fully functional alternator.

After the ignition key is turned on, the printed

circuit board determines that at least 13.3 volts

is available at the terminal block, so the 12

volt heating element engages.

VOLTAGE

---)

13.3 V.D.C.

(FOR 40 SEC. MIN.)

12V ELEMENT

ENERGIZES

(71)

When the customer leaves on the trip it is a

hot, muggy night so the vehicle’s headlamps as

well as the dash air conditioning system is

turned on. After a few minutes of driving it

begins to rain, so the windshield wipers are

also turned on. With all of these components

operating in the coach, the alternator has

difficulty keeping up with the demand of the

total coach load and the house battery begins

to drain. As soon as the printed circuit board

sees that the battery voltage going to the

refrigerator has dropped to approximately

volts, the electronic circuitry will shut off the

12 volt DC heating element to protect the

house battery, At this time, an approximate 25

minute delay cycle will be in progress.

LOWER THAN 11 V.D.C. =

HEATING

ELEMENT

OFF

SAFETY DELAY

(72)

If the battery voltage remains low after the

delay cycle, the automatic controls will light

the refrigerator on the LP gas mode and stay

on the gas mode until the printed circuit board

sees approximately 13.3 volts DC to the

terminal block.

LOWER THAN 13.3 V.D.C.

FOR 25 MIN. OR MORE q

L.P. GAS

OPERATION

A-6-21

28

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 93 94

Comments to this Manuals

No comments