Whirlpool WRIBT41WB User manual

Sep-12
Service Manual
WRIBT41WB
WRIBP41WC
WRIBP41MC
WRIBP45WC
No Frost Refri erator
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Whirlpool of India Ltd.
Service Manual
Top Mount
No Frost Refri erator
Whirlpool of India Ltd.
Service Manual
No Frost Refri erator

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INDEX
Sno. Detail Pa e No.
1.0 Model Range 3
2.0 Safety Precuations 4
3.0 Feature /Technical specification
4.0 Controls & Electronic configuration 7
5.0 Wiring Diagram 9
.0 Assembly/Dissembly 11
7.0 Controlling the refrigerator temperature 14
8.0 Error indications & Trigger 15
9.0 Exploded Views 17
10.0 Part List 29

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NO FROST REFRIGERATOR: MODEL RANGE
410L Dlx Better White – WRIBT41WB
410L Dlx Best White – WRIBP41WC
410L Dlx Best Suslite – WRIBP41MC
445L Dlx Best White – WRIBP45WC

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5

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TECHNICAL /FEATURE SPECIFICATION
MODEL 410 L Dlx 445 L Dlx
Type Frost Free Frost Free
Capacities (L) total net 410L 445 L
Product Dimensions (mm)
Width 700 700
Hei ht 1658 1775
Depth 740 740
Gross Wei ht (k ) 85 90
Volta e / Hz 220/50Hz 220-240V/50-60Hz
Compressor ADW66AK EMY65HLC
Oil Capacity ISO 22 (220 ml) ISO 22 (280 ml)
Comp. Run Capacitor
CBB60
4microF/450VAC
XS351505XLUB
5 microF/350VAC
PTC Relay QP2-15
PTH7M220MD3
Motor Protector JUX-23GCF
4TM283KFBYY-
53
Fan motor MES 3W MI 9.8W
Split Diffuser NO NO
Deodorizer Yes Yes
Number of Shelves 2 2
Type of Shelves Glass Glass
Humidity Control
RC Illumination ( 6 LED Bank ) Illumination by LED’s Illumination by LED’s
FC Illumination ( 2 LED Bank ) Illumination by LED’s Illumination by LED’s
Bottle Separator YES YES
Packet Separator YES YES
Can Rack NO NO
E tray 1 No. 1 No.
Removable Ice twister YES –Plastic YES –Plastic
Puff pastry YES YES
Beer caddy YES YES
Thaw zone YES YES
Beer central YES YES
Freezer Door Bins 2 2
Refri erator Door Bins 4 4
Door lock NO NO
Handle FLUSH FLUSH
Roof Rail NO NO
Cabinet Stopper YES YES
POT Control in RC compartment YES YES
Fast Forward Cool Operation NO NO
Door Alarm YES YES
Auto Power save mode NO NO

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CONTROLS & ELECTRONICS
CONFIGURATION
Product Configuration
No frost Dlx
Product
Control
RC Controlled
Software
BEE/Pot based Professional
User interface
No
Auto cool mode
No
Ice accelerator
No
Auto Power save mode
No
Door Alarm
Yes
Power supply for illumination
DC
RC Illumination (6 LED)
Yes
FC Illumination (2 LED)
Yes
Control Board
Yes(Hercules)
Defrost heater
Yes (Integrated Al tube
200W)
Fan motor
9.8W MI/3W MES
FC Door grounding
No
Compressor
EMY65HLC/ADW66AK
Run Capacitor
YES
Door Reversibility
NO

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Top Mount: Deluxe models:
This refrigerator is managed by an Electronic System, mainly consisting of the components:
• Electronic Control Board (Hercules- Dlx (BEE))
• POT (Potentiometer) in case of Dlx (BEE) models only.
• Temperature Sensors {refrigerator, Defrost}
• Compressor ( With Run capacitor)
• Freezer Fan Motor (AC)
• Defrost Heater ( Integrated Al tube 200W)
• Door Open Sensing
These components are described as shown below.
– Electronic Control
The complete operation of this product is done by the Electronic Control, Functions of this models are
fully controlled by the Micro-controller IC which executes the functions according to the needs, turning
the components On or Off through received/managed signals, such as:
- Compressor On/Off
- Defrost Heater On/Off
-Temp setting in refrigerator Compartment, through received signals by the POT along with the RC &
FC Sensors Temp. Feedback.
-Door open sensing / Alarm
- Among many other functions controlled by its software.
The Electronic Control is located at the rear of the refrigerator, next to the cabinet and besides the
Compressor, inside a plastic box. Cables going inside the product, using connectors that do not permit an
assembling failure do its connection to the mains and its components.
Note: For more details see wirin Dia ram.

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Wirin Dia ram : Top Mount – No Frost Dlx
Refri erant Char in quantity:

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Identification of connectors:
CN1 (Connector 1)(6 pin MLX) – Compressor, Heater and Power Cord
CN2 (Connector 2)(8 pin minifit) – Temperature Sensors/POT
CN3 (Connector 3)(6 pin minifit) – RC/FC LED
WARNING
Electrostatic Dischar e Risk
Do not touch the Circuit components, because you can damage fuse/burned or weaken the
board.
Always handle the Boards by the sides/plastic holder.
Spare parts/stock boards if outside the BOX must be kept in anti-static packaging.
Connector 1
Connector 2
Connector 3

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Assembly &Disassembly Procedure
Disassembly Procedure:
A) Core Board Box
1. Disconnect the Power cord from the Mains supply.
2. Remove the Mountin Screws and connectors.
IMPORTANT
# Be careful when using the Multimeter measuring probes, as they may damage the
Connector terminals.
# Be careful when removing the electronic board connectors, as they are latched.
Remove them at right angles with no side movements
Mounting screws

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1. Defrost Sensor mounted on the Evaporator tube.
2. Removin the Defrost Sensor
Defrost Temperature Sensor – NTC
It’s located at the freezer compartment, along with the Evaporator. The Defrost Sensor is responsible
for sending signals to the electronic control, which will command the ending of the defrost, turning
off the Defrost Heater,
This does a similar function to the well-known Defrost Bimetal
NEVER replace these Sensors with the Sensor Kit used in the Symphony model.
In the need of replacing one of the Temperature Sensors, Replace the full RC Sensor harness. Directly
replace the relevant RC Sensor harness. Do not try to repair the harness for the faulty Thermistor.
IMPORTANT
Never change the position of such Sensors, as their functional characteristics can be
modified. This sensor also informs the temperature conditions of the Evaporator when
the product is activated (plugged in electricity) indicating to the Electronic Control the
correct start up to be followed, for instance, manufacturing ,default or the previous
programming done by the user, compressor delay , etc.
WARNING
These Sensors (refrigerator & Defrost) Are Compatible with Each Other, but
Are not compatible
with the Sensors of the previous Model (SYMPHONY
)

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Coolin control:
Dlx models:-
Door Open Sensin Alarm
Door open sensing alarm activates or gives beep if the door is kept open for more than 2 min.
During the Door opening beep alarm if the door is closed then the alarm gets deactivated .
Adaptive Defrost Control
The defrost cycle shall be started after the Defrost timer has expired. According to the following defrost procedure:
Defrost must be executed every time one of the following event occurs:
1. After 8 hours (+/-10 minutes) of compressor running, calculated considering just the thermostat function.
2. When the product goes into defrost (in thermostatic mode) a time period of 20 min (+/-1 minute) is allowed
to complete the time to defrost.
3. If the door open time > 10 min, within first 5 hrs of cumulative compressor run time, defrost is initiated at
5hrs.
4. If the door open time < 10 min or If there is at least one door opening up to 8 hrs of compressor running then
defrost time is as per point 1.
5. If there is no door opening up to 8 hrs of compressor running than defrost time will be 18hrs
. If there is no door opening for 8 hrs, & there is door opening between 8 to 18 hrs of compressor running,
defrost will take place immediately.
The 5
th
, 8th or 18
th
hr of compressor running (defrost timer) consist of the sum of all the compressor’s ON time,
independently of the number of compressor cycles and how many time the compressor was ON.

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Safe mode routine
During Constant fault condition, the Electronic Control will assume a safety routine, as in normal
cycle, trying to keep food conservation, however will work as follows:
• Compressor and Fan Motors will be on for 25 minutes and then will turn off for 20 minutes.
• Interval set between defrosts will be fixed in every 5 hours of the Compressor activity
• Every defrost time is fixed for 20 minutes. No dependency on defrost sensor for Cut Off temp of
15°C
Note: -
•There is no Service routine provided in this model.
•To check whether Heater is working fine or not, service person can use the Power up initialization
function of the model, where Product need to be switched Off & need to be ensured that the temp at
the FC sensor is >0°c, then after making the product ON product goes into the Power up initialization
mode where after product switch ON, heater gets activated for the first 5 seconds & then it goes to the
compressor mode after 3 minutes of heater getting off. Service person can make the use of this 5
seconds where by putting the Tong tester one can easily identify the healthy/faulty condition of the
heater through the driving current displayed on the tong tester it self at the Electronic core board box
location without opening the FC Plenum.
•In case of any Aluminum foil wrapping found over the Wiring harness either in FC compartment, RC
Compartment or in the Compressor deck area, the same Al foil should be carefully replaces in same
fashion after servicing
•In case of any detailed technical information please check with the Dlx technical specification.
Normal
Compressor
/Product
running
Mode
Sensor
Failed??
(Open/Shor
t Mode)
{RC, FC
sensor or
POT
Start Safe mode
routine
after 2 min of
error
Event in sensor
Yes
No
Whether
sensor/POT
is
repaired/cor
rected??
No
Yes

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Board Level Dia nostics for :
* Thermistor Failure FC/RC
* Potentiometer Failure
1 First Turn Off the Product & disconnect the Plug.
2 Remove the 3 connectors of Control Board.
3 For Thermistor Failure FC/RC
* Check resistance on pin no. 4 & 8 of CN2 (8 pin connector) for RC Thermistor.
* Check resistance on pin no. 2 & of CN2 (8 pin connector) for FC Thermistor.
* IF thermistor is open then the resistance is infinite.
* IF thermistor is short then the resistance is zero.
* IF resistance lie between 0-22 KOhms the themistor is OK.
5 Potentiometer Failure
* Check resistance on pin no. 1 & 5 of CN2 (8 pin connector) for Potentiometer.
* It should lie between 0 to 22 K ohms

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EXPLODED VIEWS:

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