Technical data

Status Duty-Cycle

both sensors o.k. 7 sec. ON

air-sensor missing/defective 9 sec. ON

evaporator-sensor missing/defective 12 sec. ON

both sensors missing/defective 15 sec. ON

If the air-sensor fails during normal operation, the software shuts down the

cooling unit in steps to 0.

In refrigerators without evaporator-sensor or if the evaporator-sensor is

defective the leakage test is not carried out.Then the new electronics works

like the previous one without leakage detection.

Automatic Defrost Function

The electronic also regulates the automatic defrosting of the refrigerator.

When the plug has been stuck to the socket the running time of the

refrigerator up to the first defrosting is 15 hours for greenline models

and 39 hours for the new face lift models (RH4XX). For all models the

defrosting takes 2 hours. Then the refrigerator works 22 hours and

afterwards defrosts 2 hours. Therfore the starting of the refrigerators

determines the time of defrosting.

For example: Starting at 7.00h = first defrosting 22.00h - 24.00h (for facelift

models 22.00h next day)

3.0

TT TT

(39h)

X4, connection heating element

Connections evaporator-sensor = Y3, Y4

Connections air-sensor = Y1, Y2

Do not change the

connections of the

evaporator-sensor and

the air-sensor !

Air-sensor

Evaporator-sensor

X1,X2,X3 = N

X5,X6 = L

In service case please pull sensor off

electrics and check by means of

measurement.

(ch. 15.0 Troubleshooting)

Ambient temperature°C Resistance (kW)

0° 32,51 +/-2%

10° 19,86 +/-2%

15° 15,68 +/-2%

20° 12,48 +/-2%