Electrolux RM 4215 Betriebsanleitung

SERVICE- INSTRUCTION

Publications-No.:

599 47 22-58/4

replaces 599 47 11-18/1 T.D. RS 12/99

Language: English

AES II- Absorption Refrigerators

(only for built- in in motor caravan)

COOLING

3110

RM 4185

RM 4215

RM 4235

RM 4265

RM 4275

RM 4285

RM 4365

RM 4405

RM 4505

RM 4605

RM 4705

RM 4805

RM 5215

RM 5275

RM 5405

RM 6275

RM 6295

RM 6405

Table of Contents Page

1.0 Model Description 3

2.0 AES II System Function 3

2.1 Priorities 3

2.2 Switchover Times / Time Delays 3

2.3 Low Voltage Operation 4

2.4 Tank Stop 4

2.5 Thermostat Sensor 4

3.0 Technical Descriptions 5

3.1 Block Diagram 5

3.2 Power Module Connections 6

3.3 Display Module 7

3.4 Power Module 8

3.5 Ignition Device 8

3.6 Thermocurrent Adapter 8

4.0 Installation 8

5.0 Troubleshooting 8

5.1 Diagnostics Mode 8

5.2 Error Analysis and Elimination 9

6.0 Wiring Diagram 11

7.0 Spare Parts Numbers 12

8.0 Service Bulletins 13

9.0 Operation of AESII with solar 17

charging regulators

1.0 Model Description

2.0 AES II System Function

An AES II refrigerator independently selects between the possible energy sources of 230 V,

12 V, and gas. The control electronics automatically ensure that the refrigerator is supplied from

the energy source optimal at a given time. You can not operate the refrigerator with more

than one energy source simultaneously. You may also not manually select a certain energy

source. The electronic thermostat controls the refrigerator during "ON/OFF" operation, independ-

ently of the energy source.

The basic function for the AES II is: cooling under all conditions. The amount of voltage

applied each time is therefore monitored during electrical operation (230 V or 12 V). If the volta-

ge falls below the relevant limit values (200 V for mains power supply voltage and 11 V for battery

operation), gas operation is selected (see low voltage operation). For its operation, the AES II

refrigerator requires a 12 V continuous plus supply to operate the control electronics.

Operation on a 24-V power supply is not possible.

2.1 Priorities

The refrigerators selects the type of energy according to the following priorities:

1) 230V: if the voltage > 200 V

2) 12V: if the motor is running (D+ signal from the generator) and voltage > 11V

3) Gas: if 230V is not present or < 200V, or 12V voltage < 11 V

2.2. Switchover Times / Time Delays

The following diagram displays the switchover times between the individual energy sources:

Refrigerator Mobil

Tropicana

Super-Iso

with AES

(Automatic Energy

Selector)

with

Interior Light with double

Door Look

230V

Gas 12V

immediately

15 min. (compare tank stop)

approx 20sec.

I.E.

approx 20sec.

2.3 Low Voltage Operation

The so-called "low voltage gas operation" is an exception. If the electrical power supply voltage

in 230-V or 12-V operation is insufficient to maintain the cooling operation, the AES switches to

gas operation under certain conditions. A yellow LED displays this state. The conditions for swit-

ching over to gas operation are described in Section 2.2. If gas operation is selected due to low

voltage, the refrigerator remains in gas operation for 30 minutes to avoid a continuous switching

back and forth (oscillation) between the energy sources. After 30 minutes of gas operation, the

electronics checks the applied voltage at regular intervals. If the power supply voltage again

becomes sufficient, the refrigerator again switches to 230-V or 12-V operation.

2.4 Tank Stop

The AES electronics does not begin operating the refrigerator on gas until the motor has been

turned off for 15 minutes to avoid an undesired switchover to gas operation during a tanking

procedure.

2.5 Thermostat Sensor

The thermostat sensor consists of an electrical resistor (NTC). The resistor is installed on the

evaporator cover, but it does not have a direct connection to the evaporator coil. The purpose is

to measure the air temperatures on the inside of the refrigerator. This is how the electronics

always controls the refrigerator at the temperature that has been set once, even for changing

ambient temperatures within the framework of the unit's capacity.

Important:: The sensor must not come into direct contact with the aluminum evaporator (space

sensor is not an evaporator sensor) to provide correct functioning.

The device goes into continuous operation if the thermostat sensor is defective.

Thermostat Sensor

Reference value of the sensor:

Room temperature in °C Resistance (kOhm)

5° ca. 7,24

10° ca. 5,63

15° ca. 4,42

20° ca. 3,50

3.0 Technical Descriptions

3.1 Block Diagram

The following diagram shows the AES II system components:

Display Modul

Power Modul

Solar input 230 V~

12 V -

D+ (generator)

Reigniter Thermocurrent

adapter

Heating element DC

Heating element AC

3.2 Power Module Connections

Connection Type Definition

P1 I/ O Connection cable display/ power module

P2 I Temperature sensor

P3 I/ O Reigniter

P4 O Lifting magnet

T1 O 12V DC lighting

T2 O 12V DC heating element

T3 I 12V DC power supply (+)

T4 I 230V AC

T5 O 230V AC heating element

T6 O 230V AC heating element

T7 I 230V AC

T8 I Ground

T9 I Generator (D+)

T10 I Solar system

3.3 Display Module

The display module is located on the control frontplate of the AES II refrigerator.

You must operate the power switch (A) to turn the device on.

The AES function LED (B) then lights up green, and the middle LED (E) lights up yellow to display

the selected temperature setting.

You can use the momentary-contact pushbutton for temperature selection (D) to change the refri-

gerator section temperature setting. The low voltage LED (C) lights up yellow if the refrigerator

has selected gas operation to maintain the refrigerating capacity due to low voltage in an electri-

cal supply source (230 V or 12 V).

If there is a fault during gas operation (gas couldn't be lit, gas container empty, etc.), the AES

LED (B) flashes red. In this case, the device does not continue to cool. You must eliminate the

gas fault and start the refrigerator again. (Use the power switch to switch the refrigerator off and

on again.)

Important:: If there is a fault during gas operation and you don't notice it before the refrigerator

changes to 230 V, for example, due to a priority change, the AES LED (B) again changes to

green until the cooling function has been established again. However, the next time it wants to

change to gas operation, the fault is displayed again, and gas operation is not started. The rea-

son is that there are legal regulations that do not permit the device to carry out an automatic

reset. If you have a gas fault displayed by a red flashing AES LED (B), you absolutely must

acknowledge this gas fault by using the power switch to switch the device off and on again.

A Power switch

B AES operation indicator GREEN: Refrigerator working

flashing RED Fault in the gas operation,

refrigerator not cooling.

C Low voltage LED YELLOW Rrefrigerator in gas opertion,

because the electrical power supply

voltage is insufficient.

D Sensor for temperature setting

E LEDs for displaying the selected temperature setting

3.4 Power Module

The power module (A) is located on the backside of

the refrigerator. A multicore cable connects the

power module and the display module.

There are fuses to protect both electrical heating

cartridges located in the power module. All the

electrical components for controlling the various ope-

rating modes are located in this module. The

module's printed circuit board has been sealed

completely water tight to protect against

environmental influences.

3.5 Reigniter

The reigniter is also located on the backside of the refrigerator. The power module supplies the

reigniter3 with voltage. Refer to Publication Bulletin Number 599 4716-54/5 (Pages 13-14) for

detailed information about the ignition devices used.

3.6 Thermocurrent Adapter

The thermocurrent adapter is located between the igni-

tion fuse and the thermoelement coupling. The power

module controls the thermocurrent adapter. The adap-

ter serves to switch off gas operation during the chan-

ge from gas to another operating mode by interrupting

the thermocurrent to the ignition fuse.

4.0 Installation

To guarantee the orderly functioning of the AES II refrigerator, correct electrical

installation is absolutely necessary.

The 12-V connection to the battery must be a 2-pole connection.

The connection cable must be 6 mm2and be 10 mm2for greater lengths.

The D+ control input must be wired from the generator to the 12-V supply termi-

nal (cable cross-section 1 or 1.5 mm2, otherwise 12-V operation is not possible).

5.0 Troubleshooting

5.1 Diagnostics Mode

The AES II system has a built- in diagnostics program used to test basic system functions.

The test program offers the capability to switch the refrigerator deliberately into certain operating

states.

The following test sequences are available:

- Self-test for the display module and power module and for communication between both

components

- AC operation (230 V) test

- DC operation (12 V) test

- Ignition device test

a) Preparations

The AES II device must be connected to a 230-V supply line and a 12-V supply. You must con-

nect a gas cylinder and open the gas supply to test the gas function.

b) Test execution

You must proceed as follows to arrive at diagnostics operation:

1. Switch off the device

2. Press the button for the temperature setting and keep this button depressed. Use the power

switch to switch the device on.

3. Keep the button for the temperature setting depressed until the AES operation LED switches to

red and diagnostics operation begins.

The AES operation LED is red during diagnostics operation.

A self-test for both electronic modules is first carried out, and all the display module LEDs are

controlled once. The left temperature LED then lights up. Diagnostics operation has selected the

original position.

You can select the following tests when you activate the temperature selection switch:

LED 1: All outputs are switched off, standby mode

LED 2: Mains power supply, 230-V heating cartridge is controlled

LED 3: Lifting magnet, thermocurrent adapter, and the ignition device* are controlled

LED 4: 12-V operation, 12-V heating cartridge is controlled

LED 5: Ignition device is controlled

* Important: For safety reasons, it is possible to control the lifting magnet just once. If the lifting

magnet is controlled again, you must first switch the device off and then start diagnostics

operation again.

C) Terminating diagnostics operation

You can use the power switch at any time to switch the device off and terminate diagnostics ope-

ration. If someone unintentionally forgets to switch off the diagnostics operation, the device swit-

ches back to cooling operation after four minutes.

5.2 Error Analysis and Elimination

Errors according to priority:

Cause 1: The lifting magnet does not remain tightened for the required 20 seconds.

The thermoelectric voltage is insufficient, and the ignition fuse closes.

Elimination 1: Exchange the electronic.

Cause 2: The spark plug fires even though there is a flame present (no flame recognition).

The electronics switch to fault after 25 seconds.

a) The connection between the spark plug and ignition cable is deficient. (Refer

to Bulletin 599 4717-69/1, Page 15.)

b) The ignition device is defective. (See Bulletin 599 4716-54/5, Pages 13-14.)

Eliminaion 2: Chance the spark plug or the reigniter.

1. Gas Operation

Error: Fault LED flashes red

Cause 3: After the lifting magnet drops, the AES again tries to ignite and then goes to a

fault after 25 seconds. Is the thermoelement on the thermocurrent adapter

loose?

Elimination 3: Hand-tighten the screw connection (SW 8mm).

Cause 4: The thermoelectric voltage is not sufficient to keep the ignition fuse open. The

reason is due to wear and tear and component tolerances, for example:

1. Bad thermoelement (soot formation)

2. The thermocurrent adapter's internal resistance is too high.

3. The holding current for the magnetic insert for the ignition fuse is too much.

Elimination 4: Exchange the thermocurrent adapter and the ignition fuse and/or

thermoelement. (See Bulletin 599 4721-91/7, Page 16.)

Cause 5: The lifting magnet does not press the ignition fuse down deeply enough, so

there is no mechanical contact in the magnetic insert

Elimination 5: To check after tightening the lifting magnet, press down on the red ignition fuse

button. If the flame stops after the lifting magnet drops, the lifting magnet or the

ignition fuse must be adjusted.

In the factory setting, the AESII electronics control the lighting. If there is a lighting defect, first

check the light. If the lighting does not function even if the light is intact, you must proceed as fol-

lows:

1. Disconnect and insulate the white

and yellow cable on the connec -

ting terminal (A).

2. Connect the B and C connections

of the connecting terminal together

to test them.

If the lighting functions, use a

15-Ohm resistor with

spare part number 295 1749-10/6 in

the connecting terminal as a

connection.

2. Interior Light

black black

brown white

12V-connection

Terminal block

black

white

red

white

Ground Ground

yellow

AES II

ELECTRONIC

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