Haier BFQ50 Service Manual

Order No. Ref1212S006V0

2012(HAIER ELECTRICAL APPLIANCES COR. LTD)

©All right reserved. Unauthorized copying and distribution is a violation of law.

Chest Freezer

S

ERVI

C

E MAN

U

AL

MODEL:BFQ50

Haier Group

This service information is designed for experienced repair technicians only and is not designed for use by the general public. It
dose not contain warnings and cautions to advice non-technical individuals of potential dangers in attempting to service a product.
Product powered by electricity should by serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

WARNING

SERVICE MANUAL

Model: BFQ50

2

Issue 2012-12-27
Rev.

Ref1212S006V0

Contents

Table of Contents ···································································································· 2

1. General Information ···························································································· 3

1-1. General guideline ·························································································· 3
1-2. important notice ···························································································· 3
1-3. How to read this Service Manual ·································································· 4

2. Product Feature ··································································································· 5
2-1. Specifications ································································································ 5

2-2. External views ······························································································· 6

3. Installation, adjustments and maintenance ······················································ 7

3-1. Installation ····································································································· 7
3-2. Defrosting and draining ················································································· 7
3-3. Cleaning the freezer······················································································ 8

4. Disassembly ········································································································· 9

4-1. Door assembly (Door, hinge, hinge cover) ··················································· 9

4-2. Compartment Grill assembly ········································································ 9
4-3. Control panel assembly (Panel, cover board, knob, indicator light) ············· 10

4-4. Thermostat assembly ·················································································· 11

5. Control and display system················································································ 12
5-1. Control and display panel ············································································ 12

5-2. Starting the Freezer ····················································································· 12

6. System flow principle ························································································· 13
6-1. Refrigeration flow chart ··············································································· 13

6-2. Refrigeration flow scenograph ···································································· 13

7. Circuit diagram ···································································································· 14

7-1. Brief principle diagram ················································································ 14

8. Trouble shooting ································································································· 15

8-1. Normal phenomena····················································································· 15
8-2. Abnormal phenomena ················································································· 17

SERVICE MANUAL

Model: BFQ50

3

Issue 2012-12-27
Rev.

Ref1212S006V0

Chapter 1 General Information

1-1. General Guidelines

When servicing, observe the original lead dress. If a short circuit is found, replace all parts which
have been overheated or damaged by the short circuit. After servicing, see to it that all the protective
devices such as insulation barriers, insulation papers shields are properly installed. After servicing,
make the following leakage current checks to prevent the customer from being exposed to shock
hazards.

1) Leakage Current Cold Check

2) Leakage Current Hot Check

3) Prevention of Electro Static Discharge (ESD) to Electrostatic Sensitive

1-2.

Insulation Test

1. Check if there is any leak of current.

2. Cut out the power supply before the repair to avoid an electrical shock hazard.

3. In the case of a live-line test, insulating gloves should be worn to avoid potential electrical shock.

4. Confirm the rated current, voltage and capacity before testing with any kinds of instruments.

5. Watch if the upper door is open when we check something at a lower position.

6. Take out every part in the cabinet before moving the machine, especially things like panels (e.g. glass
shelf).

7. Please wear intact cotton gloves when repair any parts of the evaporator, so that scratches by the
sharp fins can be avoided.

8. If there is a breakdown with the refrigeration system, please surrender the machine to the service
center, else the leaked refrigerant may pollute the atmosphere.

9. The refrigerator use AC of 115V with a frequency of 60Hz.

10. A big fluctuation of voltage may cause a start failure of the refrigerator, a burn-out of the control panel
and compressor, or an abnormal sound from the compressor in operation.

11. Take care not to damage the supply line. Don’t yank at the line; pull the plug out gently from the
receptacle. Don’t press the line under the cabinet or step on it. Take care not to roll on or damage the
supply line when moves the machine from the wall.

12. In the case of leakage of inflammable gases like carbon monoxide, open the door and windows. Don’t
pull out or insert the plugs of the appliance.

13. Don’t touch the refrigeration surface of the freezing compartment when the refrigerator is in operation,
especially when our hand is wet, else we may be glued to the surface.

14. Pull out the plug of power supply during clearance or power outage. Wait at least five minutes to
resume the power supply in order to prevent damage to the compressor caused by continuous restart.

SERVICE MANUAL

Model: BFQ50

4

Issue 2012-12-27
Rev.

Ref1212S006V0

Photo used in this manual

The illustration and photos used in this Manual may not base on the final design of products, which may
differ from the products in some way.

1-3. How to read this Service Manual

Icons are used to attract the attention of the reader to specific information. The meaning of each icon is
described in the table below:

Note:

A “note” provides information that is not indispensable.

Caution:

A “caution” is used when there is danger that the reader, through incorrect manipulation, may damage

equipment, loose data, get an unexpected result or has to restart (part of) a procedure.

Warning:

A “warning” is used when there is danger of personal injury.

Reference:

A “reference” guides to find additional information on a specific topic.

SERVICE MANUAL

Model: BFQ50

5

Issue 2012-12-27
Rev.

Ref1212S006V0

Chapter 2 Product Feature

2-1. Specification

1. Type Model / BFQ50

Commercial brand / Black&Decker
Product description / Chest Freezer

Type of appliance (FS=free standing / BI=
built-in)

/ FS

Climate class (N=16-32℃ ST=18-38℃
T=18-43℃)

/ N

2. Key index / /

Gross capacity l 143
Total net capacity l 142
Defrosting (Manual-Automatic) / Manual
Kind of coolant (R134a/R600a) / R134a
Foaming components (R141b/C-P) / C-P

3. Technical data / /

Voltage / frequency/Compressor brand V/Hz 115V/60Hz
Input power / currency W/A 1.69A
Length of cable / incl. plug cm 150/155

Lowest Temperature °C

≤-18°C

Energy consumption kWh/year

240kW·h

Cooling system:(K=Compressor / A=Absorbtion) / K

4. Product net dimensions / /

Unit dimensions (H / W / D) cm 84.5/72/56
Net weight kg 35

5. Packing dimensions & loadability / /

Packing dimensions (H / W / D) cm 89.0/77.5/59.5
Gross weight kg 39

SERVICE MANUAL

Model: BFQ50

6

Issue 2012-12-27
Rev.

Ref1212S006V0

2-2. External views

Door

Cabinet

Control panel

Drain pipe