Cetron TMF Series User manual

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Service Manual
TMF SERIES
(The picture in this service manual is only for reference, and specific appearance and configuration are
subject to the real product)
Applicable Models
RMN252PYNRX0
RCN252PYNRX0

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CFCs have been used in refrigerant as refrigerator and the insulation materials for many years.
But it is now known that these compounds which once seemed so ideal for use as cleaning
agents and in refrigeration systems, destroy the earth’s ozone layer as a result, an
international body decided on a total worldwide ban of harmful CFCs by the end of 1995.
WARNING
Important Safety Notice
There are special components used in this equipment which are important for safety. These parts are marked
by in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is
essential that these critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire
or other hazards. Do not modify the original design without permission of manufacturer.
WARNING
Important Safety Notice
The Maintenance Manual is only for the use of maintenance personnel with certain experience and
background in electrical, electronic and mechanical field.
Any attempt to repair main devices may lead to personal injury and property loss.
Manufacturers or distributors are not responsible for the content of the Manual and interpretation thereof.

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Contents
1. SAFETY WARNING CODE ........................................................................................................................5
1.1 WARNING FOR OPERATION SAFETY................................................................................................................................................5
1.2 SAFETY INSTRUCTION FOR REFRIGERANT.....................................................................................................................................7
2. DESCRIPTION FOR PRODUCT FEATURES.............................................................................................8
3. INSTALLATION AND COMMISSIONING...................................................................................................9
3.1 HANDLING ..............................................................................................................................................................................................9
3.2 DOOR DISASSEMBLY AND ASSEMBLY............................................................................................................................................9
3.3 INSTALLATION LOCATION ....................................................................................................................................................................9
3.4 LEVELING OF THE REFRIGERATOR ..................................................................................................................................................................10
3.5 DOOR REVERSAL.....................................................................................................................................................................................................10
3.6 INSTALLATION OF HANDLE...............................................................................................................................................................11
3.7 INSTALLATION OF DOOR LOCK .......................................................................................................................................................11
3.8 ADJUSTMENT TO LEVELTHE DOOR...............................................................................................................................................11
3.9 ADJUSTMENT TO SHELVES..................................................................................................................................................................................11
4. TERMS...................................................................................................................................................................12
4.1 DEFINITION OF MODEL (NONE)................................................................................................................12
4.2 LOCATION OF NAMEPLATE...................................................................................................................................................................................12
5. PRODUCT SPECIFICATION....................................................................................................................13
5.1 TYPE SPECIFICATION(NONE) ...................................................................................................................13
5.2 ELECTRICAL PARAMETERS..................................................................................................................................................................................13
5.3 INSIDE TEMPERATURE ...........................................................................................................................................................................................14
5.4 DEFROSTING PARTS...............................................................................................................................................................................................14
5.5 CIRCUIT DIAGRAM.............................................................................................................................................................................14
6. INTERNAL VIEW AND DIMENSION.........................................................................................................15
6.1 MAIN PARTS AND THEIR NAMES ....................................................................................................................................................15
6.2 EXTERNAL DIMENSION......................................................................................................................................................................16
7. REFRIGERATING PIPING SYSTEM AND CIRCULATING ROUTE OF COOLING AIR .............................17
7.1 REFRIGERATING PIPING SYSTEM.....................................................................................................................................................................17
7.2 CIRCULATING ROUTE OF COOLING AIR........................................................................................................................................18
8. DISMANTLING OF PARTS..................................................................................................................................19
8.1 PARTS ONTHE DOOR.......................................................................................................................................................................19
8.2 PARTS INSIDETHE REFRIGERATOR.................................................................................................................................................................19
8.3 LIGHT SYSTEM...........................................................................................................................................................................................................19
8.4 AIR DUCT COMPONENTS REFRIGERATING CHAMBER...............................................................................................................20
8.5 AIR DUCT COMPONENTSIN FREEZING CHAMBER AND FAN MOTOR.................................................................................................20
8.6 EVAPORATOR AND TEMPERATURE SENSING SYSTEM.............................................................................................................................21
8.6 COMPRESSOR CASE ........................................................................................................................................................................24

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8.7 COMPRESSOR CASE ........................................................................................................................................................................24
8.8 DISPLAY CONTROL BOARD.............................................................................................................................................................. 26
8.9 MAIN CONTROL BOARD....................................................................................................................................................................26
8.10 BAR COUNTER........................................................................................................................................................................................................26
8.11 WATER DISPENSER......................................................................................................................................................................... 27
8.12 ICE MAKER.........................................................................................................................................................................................27
9. FUNCTION AND OPERATION.................................................................................................................28
9.1 OPERATION PANEL...........................................................................................................................................................................28
9.2 DISPLAY...............................................................................................................................................................................................28
9.3 SETTING OF THE GEAR....................................................................................................................................................................28
9.4 CONTROL OF STANDBY FUNCTION................................................................................................................................................29
9.5 CONTROL OF ICE MAKER (NONE) ............................................................................................................29
9.6 FAULT CODE AND SOLUTIONS.......................................................................................................................................................29
9.7 DEFROSTING FUNCTION..................................................................................................................................................................29
9.8 TEST MODE .........................................................................................................................................................................................30
10. CIRCUIT DESCRIPTION........................................................................................................................32
10.1 POWER SUPPLY .............................................................................................................................................................................32
10.2 DOOR TRIP TEST CIRCUIT(NONE) ...........................................................................................................32
10.3 TEMPERATURE TEST CIRCUIT.......................................................................................................................................................32
10.4 FAN MOTOR CIRCUIT OF THE FREEZING CHAMBER ...............................................................................................................33
10.5 REFRIGERATOR FAN MOTOR CIRCUIT (NONE) ..........................................................................................33
10.6 CONDENSER FAN MOTOR CIRCUIT(NONE)...............................................................................................33
10.7 DAMPER MOTOR CIRCUIT(NONE) ...........................................................................................................33
10.8 SENSOR RESISTANCE(R/T)..............................................................................................................................33
11. TROUBLESHOOTING METHOD............................................................................................................35
11.1 NO COOLING(AIR COOLING-ELECTRONIC)...............................................................................................35
11.2 NO WORKING OF COMPRESSOR.................................................................................................................................................36
11.3 INSIDE FROSTING, NO DEFROSTING..........................................................................................................................................36
11.4 INSIDE FROSTING, NO DEFROSTING-MAINTENANCE GUIDELINES.......................................................................................37
11.5 LIGHT IS NOT ON.............................................................................................................................................................................38
11.6 AIR DUCT NOT OPERATED(ELECTRONICALLY)....................................................................................................38
11.7 FAN FAILURE....................................................................................................................................................................................39
11.8 DEFECTIVE DEFROST CIRCUIT.....................................................................................................................................................39
11.9 NOISE.................................................................................................................................................................................................40
12. FIGURES AND DETAILS OF REPAIR PARTS(DOCUMENTS AREPROVIDED SEPARATELY)...........41
12.1 FIGURES(NONE) ..................................................................................................................................41
12.2 LIST OF PARTS AND COMPONENTS(NONE).........................................................................................................41
13. APPENDIX .............................................................................................................................................42
13.1 REFRIGERATOR MAINTENANCE TOOLING AND EQUIPMENT AND MATERIAL................................................................................42

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This symbol indicates that there are important
operating and maintenance instructions in the
literature accompanying your freezer.
This symbol indicates that dangerous voltage
constituting a risk of electric shock is present
within your freezer.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
1. Safety Warning Code
1.1 Warning for operation safety
Important Safety Instructions
WARNING
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this appliance near water.
6) Clean only with a damp cloth.
7) Do not block any ventilation openings.
8) Install in accordance with the manufacturer’s instructions.
9) Do not install near any heat sources, such as radiators, heat registers, stoves, or
other apparatus that produce heat.
10) Do not defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the third prong are provided for your
safety. If the provided plug does not fit into your outlet, consult an electrician for replacement
of the obsolete outlet.
11) Protect the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit from the appliance.
12) Do not attempt to modify or extend the power cord of this appliance.
13) Unplug this appliance during lightning storms or when it will not be used for long
periods of time.
14) Make sure that the availableAC power matches the voltage requirements of this
appliance.

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CONNECTING ELECTRICITY
Electrical Shock Hazard.
Plug into a grounded 3-prong outlet. Failure to follow these instructions can
Do not remove the ground prong. result in death, fire, or electrical shock.
Do not use an adapter.
WARNING
Electric Shock Hazard
Failure to follow these instructions can result in electric shock, fire, or
death.
1) WARNING–Keep ventilation openings, in both the freezer and the built-in structure,
clear of obstruction.
2) WARNING–Do not touch the interior of the freezer with wet hands. This could result
in frost bite.
3) WARNING–Do not use mechanical devices or other means to accelerate the
defrosting process, other than those recommended by themanufacturer.
4) WARNING–Do not damage the refrigerant circuit.
5) WARNING–Do not damage the refrigerant tubing when handling, moving, or using
the freezer.
6) WARNING–DANGER–Never allow childrento play with, operate, or crawl inside the
freezer. Risk of child entrapment. Before you throw away your old freezer:
6-1) Take off the doors
6-2) Leave the shelves in place so that children may not easily climb inside
7) Unplug the freezer before carrying out user maintenance on it.
8) This freezer can be used by children age eight years and older and persons with
reduced physical or mental capabilities or lack of experience and knowledge if they are
given supervision or instruction concerning the use of the freezer in a safe way and
understand the hazards involved. Children should not play with the freezer. Cleaning and
maintenance should not be performed by children without supervision.
9) If a component part is damaged, it must be replaced by the manufacturer, its service
agent, or similar qualified persons in order to avoid a hazard.
10) Please dispose of the freezer according to local regulations as the freezer contains
flammable gas and refrigerant.
11) Follow local regulations regarding disposal of the freezer due to flammable
refrigerant and gas. All refrigeration products contain refrigerants, which under the
guidelines of federal law must be removed before disposal. It is the consumer's
responsibility to comply with federal and local regulations when disposing of thisproduct.
12) This freezer is intended to be used in household and similar environments.

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13) Do not store or use gasoline or any flammable liquids inside or in the vicinity of this
freezer.
14) Do not use extension cords or ungrounded (two-prong) adapters with this freezer. If
the power cord is too short, have a qualified electrician install an outlet near the freezer. Use
of an extension cord can negatively affect the freezer’s performance.
Grounding requirement
This freezer must be grounded. This freezer is equipped with a cord having a grounding
wire with a grounding plug. The plug must be inserted into an outlet that is properly installed
and grounded.
Improper use of the grounding plug can result in a risk of electric shock. Consult a
qualified electrician or service person if the grounding instructions are not completely
understood, or if doubt exists as to whether the freezer is properly grounded.
1.2 Safety instruction for refrigerant
Explosion Hazard.
Keep flammable materials and vapors, such as gasoline, away from freezer. Failure to do so
can result in fire, explosion, or death.
Safety instruction for refrigerant
DANGER–Risk of Fire or Explosion. Flammable Refrigerant Used. To Be Repaired Only By
Trained Service Personnel. Do Not Use Mechanical Devices. Do Not Puncture Refrigerant
Tubing. CAUTION–Risk of Fire or Explosion. Flammable Refrigerant Used. Consult Repair
Manual/Owner’s Guide Before Attempting To Service This Product. All Safety Precautions
Must be Followed. CAUTION–Risk of Fire or Explosion. Dispose of Properly In Accordance
With Federal Or Local Regulations. Flammable Refrigerant Used. CAUTION–Risk of Fire or
Explosion Due To Puncture Of Refrigerant Tubing; Follow Handling Instructions Carefully.
Flammable Refrigerant Used.

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2. Description for product features
This product is provided with following features:
1）Refrigerator / freezer with hidden side duct outlet design, the overall style is more simple and beautiful
inside the box
2）Electronic temperature control, temperature control more accurate
3）Refrigerated air duct and the cabinet plane height difference is maintained at less than15mm,
thinner duct design more beautiful, conducive to product volume
4）Decorative duct cover design to achieve a greater degree of product differentiationdisposition
effect, to meet the different needs of different customers withmarket

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3. Installation and commissioning
3.1 Handling
Handling
1)Protect the refrigerator in moving it,Same as shown as
left photo, please move it by handcart with cushion
2)Remove all packing materials and bottom cushion, the
n move into house for placement
3)After moving it to appropriate location, wait for 2 hours
before power on.
3.2 Door Disassembly and Assembly
The refrigerator door needs to be dismantled if it cannot enter the room in the whole.
Disassembly of Freezer door
Disassembly of Freezer door
None
Disassembly of refrigerator door
Disassembly of refrigerator door
None
3.3 Installation location
Installation location
Location that is easy for ventilation shall be chosen to
facilitate heat dissipation, enhance its performance and
reduce the energy consumption.

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3.4 Leveling of the refrigerator
Leveling of the refrigerator
If the refrigerator cannot be placed steadily, adjust the
footing to level it.
3.5 Door reversal
Door reversal
1) Unplug your refrigerator and remove all food from the
door shelves.
2) Remove the left cover plate and the right top hingecover,
then unscrew and remove the right top hinge. Keep the
screws to reuse
3) Lift the freezer door up and away from yourrefrigerator.
4) Unscrew the two screws holding the center hinge,
remove the hinge, then lift the refrigerator door up and away
from your refrigerator. Save the screws to reuse.
5 )Put on the cushion block, lie down the refrigerator, re
move the 3 bolts fixed the lower hinge with the sleeve, re
move the lower hinge and adjust the foot.
6) Remove the door block from the bottom, right side of the
door and attach it to the other side.

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7) fix the lower hinge on the left side of the refrigerator w
ith the bolts and adjust the foot to the right side.
8) place the refrigerator door vertically on the lower hing
e shaft in the open door state.
9) fix the middle hinge in the middle hinge position on the
left side of the refrigerator by using the two bolts, and sc
rew the middle hinge shaft through the middle hinge and
into the door shaft hole of the cold compartment door.
10)Put the freezer door onto the center left hinge, then
attach the top left hinge to the top of refrigerator. Cover
the hinge with the top left hinge cover and cover the
screw holes on the right side of the top with the cover
plate you previously removed.
3.6 Installation of handle
Installation of handle
Installation of handle
None
3.7 Installation of door lock
Installation of door lock
Installation of door lock
None
3.8 Adjustment to level the door
Adjustment to level the door
Adjustment to level the door
None
3.9 Adjustment to shelves
Adjustment to shelves
Adjustment to shelves
None

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4. Terms
4.1 Definition of model (None)
4.2 Location of nameplate

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5. Product specification
5.1 Type specification(None)
5.2 Electrical parameters
Product Name
RMN252PYNRX0
RCN252PYNRX0
None
None
Product Code
None
None
None
None
Item
Specification
Specification
Specification
Specification
Compressor
Compressor
HYB60MHU42
HYB60MHU42
None
None
Starter(PTC)
QP2-4R7/QP2-4.
7
QP2-4R7/QP2-4.
7
None
None
Overload
protector(OLP)
DRB24T61A1/BT
68-125
DRB24T61A1/BT
68-125
None
None
Winding resistance of
compressor wiring
terminal
Rmc:8.9±7%
Rsc:10.2Ω±7%
Rms=Rmc+Rsc
Rmc:8.9±7%
Rsc:10.2Ω±7%
Rms=Rmc+Rsc
None
None
Winding resistance
picture
None
Variable frequency
driver board
None
None
None
None
Motor
Fan motor of the
freezing chamber
DC12V/2.4W
DC12V/2.4W
None
None
Ventilation door of the
refrigerating chamber
None
None
None
None
Condensation fan
None
None
None
None
separation the ice
motor
None
None
None
None
ice output motor
None
None
None
None
Open door motor
None
None
None
None
Lights inside the refrigerator
Lights inside the
freezing chamber
None
None
None
None
Lights inside the
refrigerating chamber
115V/＜2W
115V/＜2W
None
None
Switch of the
refrigerator door
Sector
Sector
Sector
None

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5.3 Inside temperature
Temperature tolerance ≤ 2 oC
Compartment
The highest (oC)
Lowest (oC)
Freezing
-16
-20
Refrigerating
7
3
Variable temperature
/ /
5.4 Defrosting parts
Item
Initial defrosting period
Normal defrosting period
Defrosting period
Temperature is lower than 0 oC
6~24 hours
Defrosting sensor
NTC
B3839
Defrosting temperature
controller
/ /
Thermal fuse
Can’t be restored
77 oC
Defrosting heater in freezing
chamber
/ 115V/175W
5.5 Circuit diagram
BCD199/226/256WE(22031020003242_22031020003241_22031020003243)

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6. Internal view and dimension
6.1 Main parts and their names
Freezer chamber
Refrigerator chamber
❶Air duct components in freezing chamber
❹Small Bottle frame in refrigerating
❷F Glass shelve
❺Big Bottle frame in refrigerating
❸Bottle frame in freezing chamber
❻Crisper for fruit and vegetable
❼Glass zone Crisper for fruit and vegetable
❽R Glass shelve
❾Air duct components in refrigerating

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6.2 External dimension
Description
Code
Size (mm)
RMN252
Height to Top of Case
A
1650
Width
B
550.5
Depth w/Handles
C
625
Depth (Total with Door Open)
D
1129
Width (door open 90 eg. w/ handle)
E
None

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7.Refrigerating piping system and circulating route of cooling air
7.1 Refrigerating piping system
RMN252PYNRX0
❶Compressor→❷Right condenser→❸Anti-condensation tube→❹Left Condenser→❺Dry
filter→❻Capillary tube→❼Evaporator→❽Suction tube→❶Compressor

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7.2 Circulating route of cooling air

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Light
8. Dismantling of parts
8.1 Parts on the door
Door seal
Door seal is installed into door liner groove.
1)Open the refrigerator door;
2)Take the door seal ① out of door liner;
Door tray
While squeezing it inward, lift up the baffle and take it out
from refrigerator liner.
Door stopper
Door stopper
None
rollover beam
rollover beam
None
8.2 Parts inside the refrigerator
Shelves
1）Lift up the division plate with a proper force and pull it
out towards yourself;
Drawer
Drawer
None
8.3 Light system

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Disassembly and installation of Air duct
The cold room lamp is in the cold room air duct compon
ent1) Pry open the lampshade with a blade
2) Remove 1 fixed screw with a cross screwdriver
Light switch
There is a light switch on the side wall of the refrigerating
chamber.
1）Loosen the hook with small normal screwdriver and
pull out the switch until the wire connector reveals.
Pilot light
Pilot light
None
Fresh light
Fresh light
None
8.4 Air duct components refrigerating chamber
Air duct components refrigeratingchamber
Use the blade to pry open the lamp cover,remove one
setscrew with a Phillips screwdriver, remove the air
components duct from the bottom
8.5 Air duct components in freezing chamber and fan motor