Merloni Elettrodomestici
55 CM WIDE BUILT-IN FRIDGE-FREEZERS
Technical Manual
I
04-10-22/01
11-33
Language
Issue/Edition
Page
4. Ambient fan
INFORMATION:
How It Works
: when cold air is directed into the refrigerator compartment, the ambi-
ent fan is also activated. Operation of this fan is partialized (first on then off) in accord-
ance with the position of the fridge knob, taking into account in any case an initial delay.
After door opening, during the fridge compressor's subsequent On cycle, the ambient
fan will remain on until the compressor's next OFF cycle (therefore not partialized).
POSSIBLE CAUSE OF MALFUNCTION:
Microcontroller management
Fan driver circuit on the board
Connection on the board
Wiring
Connections on the fan
Ambient fan
TESTING:
General on the appliance
: direct cold air into both fridge and freezer compartments,
open the door and hold down the fridge door switch. Visually check that, after the de-
layed activation period has elapsed, the ambient fan starts working.
Carry out the check using the Autotest procedure.
Wiring:
check for continuity and short circuits; check the connections (connectors and
terminals); check for presence of voltage.
Component
: check with simulated load (lamp); directly check the ambient fan (with
special wiring).
Electronic board
: visual check and quick check of the board (blowouts or burnouts,
etc.); check by using a replacement.
LEGEND
P = fixed period of 10 minutes
A = ambient fan ON time (variable)
E.g
: time A in the figure is relative to the fridge
knob set to +4 °C.
Fridge knob position
Time A
(% compared to P)
+8 °C
0%
+7 °C
0%
+6 °C
20%
+4 °C
50%
+2 °C
100%
fridge compressor ON
7 minute delay in activation of ambient fan
Fan
ON
Fan
OFF
