mabe ESTILO Manuale utente
”ESTILO” REFRIGERATORS FROM MABE
Pub # 07-MAN-RE-02
2
Index
IMPORTANT SAFETY NOTICE 3
DEFROST CIRCUIT 4, 5, 6
ELECTRONIC BOARD 7, 8, 9, 10, 11
COMPRESSOR OPERATION 12
DIRECT TEST FOR THE ELECTRONIC BOARD 13
THERMISTOR VALUES 14
HOW TO REMOVE THE CONDENSER FAN 15, 16, 17
HOW TO REMOVE THE CONTROL ON THE DOOR 18
SPECIAL FEATURES 19, 20
DIAGRAM 21
3
IMPORTANT SAFETY NOTICE
Warning: This information is intended for use by individuals possessing
adequate backgrounds of electrical, electronic and mechanical experience.
Any attempt to repair a major appliance may result in personal injury and
property damage. The manufacturer or seller cannot be responsible for the
interpretation of this information, nor can it assume any liability in connection
with its use.
CAUTION
To avoid personal injury while servicing this unit, disconnect power before
servicing. If grounding wires, screws, straps, clips, nuts, or washers used to
complete a path to ground are removed for service, they must be returned to
their original position and properly fastened.
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE. FEBRUARY 2007
4
DEFROST CIRCUIT
The defrost circuit consists of :
control board, defrost sensor, defrost thermostat, fuses, and defrost heater.
FUSE HARNESS
DEFROST HEATER WITH
METALLIC SHIELD
When the board processor has accumulated an
amount of compressor running time and the
sensor records a high resistance value above
8.5KΩ, the board sends a 12 VDC signal to the
relay and the relay energizes the heater.
CONTROL BOARD
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE. FEBRUARY 2007
5
DEFROST CIRCUIT (cont.)
•If the heater is energized for 20 minutes in the defrost cycle, the next
refrigeration cycle is increased by 2 hours; if heater is energized for 30
minutes, the refrigeration cycle is maintained as is; if heater is energized
for 40 minutes, the next refrigeration cycle is decreased by 2 hours. So,
the defrost cycles range between a minimum of 1 defrost per 8 hours to
a maximum of 1 defrost cycle every 12 hours.
•When the refrigerator is connected for the first time, the electronic
board will send a signal to enable the defrost cycle after 8 hours of
compressor run time.
•If the refrigerator is disconnected or lost of power the board memory is lost
and the next defrost cycle will be initiated after the first compressor off time.
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE. FEBRUARY 2007
6
DEFROST CIRCUIT (cont.)
DEFROST SENSOR
The sensor's function is to detect the amount of frost that has accumulated
on the evaporator and how long the element is on.
DEFROST THERMOSTAT
acts as a safety device to avoid the temperature reaching more than 22
°C (71.6 ºF).
BIMETALLIC SAFETY THERMOSTAT
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE. FEBRUARY 2007
7
ELECTRONIC BOARDS
THERE ARE 2 DIFFERENT TYPES OF ELECTRONIC BOARDS:
•A STANDARD & DELUXE (“X”, “Y”) MODELS, with BASIC ELECTRONICS
•A SUPERDELUXE (Z) MODELS, with EXTERNAL DISPLAY
These electronic boards are not interchangeable from one model to the other.
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE. FEBRUARY 2007
8
ELECTRONIC BOARD (cont.)
How to test defrost operation
1. Disconnect the refrigerator.
2. Disassemble the control board.
3. Disconnect freezer sensor harness on “CON1 Defrost”.
4. Reconnect the refrigerator.
5. Compressor start after a minimum of 4 seconds.
6. Install a jumper wire between P_P and GND pins.
7. Compressor will turn off in approx. 5 seconds and 5 seconds later the
defrost heater comes on. Clip Amprobe around the blue wire on CON4 (should
read 2.6 to 2.7 amps).
(Once heater is on, jumper wire may be removed, heater will stay on).
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE. FEBRUARY 2007
9
ELECTRONIC BOARD (cont.)
How to test defrost operation (cont.)
8. To turn defrost heater off, install a jumper wire between the two terminal of
CON1 (defrost sensor connector plug).
9. The heater will turn off within 10 seconds.
10. Disconnect refrigerator and remove jumper wire installed in step #8.
11. Reconnect refrigerator, it will now resume normal operation.
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE. FEBRUARY 2007
10
ELECTRONIC BOARD (cont.)
BASIC ELECTRONIC BOARD VERSION (“X”& “Y” Models, with Knob)
Basic Electronic Main Board
for Sedna 17’Models.
3.- OPERATION CHECK. DEFROST CYCLE OPERATION.
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE. FEBRUARY 2007
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