Dometic RM7732, RM7030 service manual Door Switch

DIAGNOSTIC SERVICE MANUAL

DOMETIC® RM7030/RM7732 Refrigerators

Check for voltage at the heating element connection terminals J7 and J8 on the circuit board. If no voltage is present, check the 5 amp AC and 3 amp DC fuses. If fuse is defective, replace the fuse. If fuses are good, replace the circuit board.

To check the flame sense circuit of the lower circuit board, operate the refrigerator on GAS mode, then measure the millivolts between J3 terminal and the other wire connection from the thermocouple. The millivolt meter should read between 25 to 35 milli- volts with the gas flame burning. Next, turn the

Black 3

Open 2

Green 1

P1

P2

6 Brown

5 Red

4Orange or White

Open 3	1 White
Blue 4
P3	2 Yellow

FIVE

AMP

FUSE

manual shutoff valve to OFF and watch the millivolt reading as it drops. Note the millivolt reading when Plug 3, terminal 4 (blue wire) receives power. It should be 10±3 millivolts or 7 to 13.

Repeat this test several times. If the igniter fails to spark on any test sequence, it should be replaced.

If the millivolt readings vary more than 1 to 2 MV from one test to the other when power is supplied to Plug 3, terminal 4, replace the lower circuit board.

3 AMP FUSE J1 J2 J3 J4 J5 J6 J7 J8 J10

NOTE: Verify all connections are clean and tight before replacing either component.

G. GAS MODE: NOTE: The PAL tester will allow for proper testing of the integrity of the upper and lower circuit boards. PAL is available from your Dometic parts distributor.

ALL TESTS ARE TO BE DONE WITH THE REFRIG- ERATOR IN THE COOLING MODE.

Before checking the circuit board for gas operation, verify that the following components are good: Upper Circuit Board, Thermistor and 3 Amp Fuse.

NOTE: Each of the following tests should be done according to pin locations. The wire colors may vary.

First, check for voltage during trial-for-ignition (approximately 45 seconds) at Plug 3, Terminals 1 (white wire) and 2 (yellow wire) to the solenoid. If no voltage is present, change the circuit board. If voltage is present, check for voltage at the solenoid. If voltage is not present, check the wires and con- nections.

Next, check for voltage to the igniter. If no voltage is present, check the wires. If good, then change the circuit board. If voltage is present, this portion of the board is good.

NOTE: When millivolts to the lower circuit board are 10 ± 3, the power to Plug 3, Terminal 4 (blue wire) will be shut off. If flame extinguishes during the cooling mode, the circuit board will not supply voltage to Plug 3, Terminal 4 (blue wire) again until the millivolts have decreased to 10±3. This process could take up to 15 seconds or longer.

5.10 DOOR SWITCH

The door switch is an open switch when the switch arm is depressed (interior light should be off). When the refrigerator door is open the switch is closed (interior light should be on). Check that the switch assembly is properly aligned and that it is not broken. Check the switch assembly for continuity.

NOTE: To do a continuity check, first be sure all power is disconnected or OFF to the refrigerator. Second, remove all wires from the switch assembly, then check the switch. After the check, be sure the switch assem- bly is wired properly per the wiring diagram.

When the switch arm is depressed, there should not be continuity. When the switch arm is NOT depressed, there should be continuity. If any of these checks are incorrect, replace the switch.

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