Premium levella PRN165DX Manual

PARTS IDENTIFICATION

1. Light box
2. Thermostat components
3. Doors
4. Decorative plate
5. Caster
6. Body

USING INTRODUCTION

COOLER

• When you install the unit in the shop, check that it is not under direct sunrays, it is in the colder area of the shop, there is free air ventilation all around the unit (otherwise the skin condensers cannot exchange heat)
• If the unit was transported laid down, wait 24hour before plug in (to allow the oil of compressor to return to compressor)
• Don't put food or drinks in the unit before the temperature inside is cold: plug in the empty unit and wait at least 1 hour that the pull down finish and the compressor starts to cycle ON and OFF, then load the unit
• Temperature adjustment: press the set key to enter the setting state of the target temperature, the temperature display window displays the curren setting temperature and flashes, continue to press the Set key, the temperature changes cyclically between 0~10 ºC, after adjusting to the target temperature, no key operation for 5 seconds, the target temperature automatically saves, exit the setting state
  The factory setting temperature is 5 ºC
• Defrosting: the system automatically defrosts, when the system enters the defrosting state, the refrigeration indicator (snowflake) flashes
• System switch: Long press thekey for 8 seconds to power on/off the system. When the system is shut down, the cooling indicator is off and the temperature is displayed as "--".

NOTE:
The temperature display window shows that E1 is the temperature sensor fault alarm.
Please call the warranty number when this fault code occurs

• SEASONAL USE
  When the unit is kept unused for a long time, please take note of the following procedures:
  • ‐ unplug the unit;
  • ‐ clean and dry well the tank;
  • ‐ leave the covers half open to prevent bad smells forming;
  • ‐ cover the unit with a curtain, place it in a dry room and sheltered from the atmospheric agents.
• Handle with care, do not throw things into the compartments that may damage the tank s walls.
• DON'T PUT WARM FOOD INSIDE THE COMPARTMENTS, THE FOOD S TEMPERATURE SHOULD BE AT AMBIENT TEMPERATURE OR BELOW. The food stored in the compartments should be packaged with non‐toxic plastic bags and the drinks properly sealed to avoid excessive ice build up on the walls.
• Do not fully load the compartment all at once, gradually increase the amount of storage.
• Keep a certain distance between the storage items in the compartment, in order to facilitate the air cooling flow and uniform temperature.
• In order to reduce the energy consumption, reduce as much as possible the number of door s openings and shorten the time the door is opened.

A schematic drawing of a household refrigerator with the simplest cycle option is shown in Fig. 1.
The main components of the systems are the hermetic piston compressor (Fig.2), the condenser, the non adiabatic capillary tube with the suction line heat exchanger, the evaporator and the cabinet.

The compressor draws in the refrigerant fluid from the evaporator by reducing the pressure in this component. The fluid is compressed by the compressor and moves to the condenser. In the condenser the refrigerant fluid under high pressure releases heat to the environment and becomes liquid. The next component of the circuit is the control device, which may be a capillary tube or an expansion valve. The control element reduces the pressure of the liquid refrigerant which was formed in the condenser. This drop in pressure permits the refrigerant to evaporate at low temperatures and return to the gaseous state when passing through the evaporator. The change from a liquid to gaseous state requires heat. So the refrigerant fluid removes the heat from inside the refrigeration system through the evaporator. The condenser releases this heat into the environment. The control element offers a certain resistance against the refrigerant's circulation, separating the high pressure (condenser) from the low pressure (evaporator) side.
The refrigeration system also uses a filter drier with desiccant to retain any water that may be left in the system.
The oil cooling tube that exists in some compressors is used to help reduce the compressor temperature.
Lastly, there are systems that use a suction accumulator to evaporate any residual liquid refrigerant, stopping it from returning through the suction line.

DISASSEMBLY

Remove light box

1. Use a Phillips screwdriver to remove four screws counterclockwise.
   

Remove compressor compartment grid

2. Use a Phillips screwdriver to remove screws counterclockwise.
   

WIRING DIAGRAM

This circuit diagram is for reference only. Please refer to the product nameplate for details

ELECTRIC COMPONENTS

COMPRESSOR

1. Role
   The compressor intakes low temperature and low pressure gas evaporated from Evaporator of the Refrigerator, and condenses this gas to high Temperature and high pressure gas, and then plays delivering role to Condenser.
2. Composition
   The Compressor is Composed of Compressor Apparatus compressing gas, Compressor Motor moving Compressor Apparatus and Case protecting Compressor Apparatus and Motor. There are PTC-Starter, and Over Load Protector (OLP) in the Compressor outside. On the other hand, because the Compressor consists of 1/1000mm processing precision components and is sealed after production in absence of dust or humidity, deal and repair with care.
3. Note for Usage
   
   1. Be careful not to allow over-voltage and over current.
   2. No Strike
      If applying forcible power or strike (dropping or careless dealing), poor operation and noise may occur
   3. Use proper electric components appropriate to the Compressor.
   4. Note to Keep Compressor.
      If Compressor gets wet in the rain and rust in the pin of Hermetic Terminal, the result may be poor operation and poor contact may cause.
   5. Be careful that dust, humidity, and flux welding don t inflow in the Compressor inside in replacing the Compressor. Dust, humidity, and flux due to welding which inflows to Cylinder may cause lockage and Noise.

PTC-STARTER

1. Composition of PTC-Starter
   1. PTC (Positive Temperature Coefficient) is a no-contact semiconductor starting device which uses ceramic material and this material consists of BaTiO3.
   2. The higher the temperature is, the higher becomes the resistance value. These features are used as starting device for the Motor.

2. Role of PTC-Starter
   1. PTC is attached to Hermetic Compressor used for Refrigerator, Show Case and starts Motor.
   2. Compressor for household refrigerator applies to single-phase induction Motor.
      For normal operation of the single-phase induction motor, in the starting operation flows in both main coil and sub-coil. After the starting is over, the current in subcoil is cut off. The proper features of PTC play all the above roles. So, PTC is used as a motor starting device.
3. PTC-Applied Circuit Diagram
   According to Starting Method for the Motor.
4. Motor Restarting and PTC Cooling
   1. For restarting after power off during normal Compressor Motor operation plug the power cord Compressor Motor operation, plug the power cord after 5 min. for pressure balance of Refrigerating Cycle and PTC cooling.
   2. During normal operation of the Compressor Motor, PTC elements generate heat continuously. Therefore, if PTC if PTC isn't cooled for a while after the power has been shut off, Motor can't operate again.

5. Relation of PTC-Starter and OLP
   1. If the power is off during operation of Compressor and the power is on before the PTC is cooled, (instant shut- off within 2 min. or reconnect a power plug due to misconnecting), the PTC isn't cooled and a resistance value grows. As a result, current can't flow to the sub- coil and the Motor can't operate and the OLP operates by flowing over current in only in the main-coil. main coil.
   2. While the OLP repeats on and off operation about 3-5 times, PTC is cooled and Compressor Motor performs normal operation. If OLP doesn't operate when PTC is not cooled, Compressor Motor is worn away and causes circuits short and Compressor Motor is worn away and causes circuit short and fire. Therefore, use a properly fixed OLP without fail.
6. Note to Use PTC-Starter
   1. Be careful not to allow over-voltage and over-current.
   2. No Strike Don't apply a forcible power or strike.
   3. Keep apart from any liquid. If liquid such as oil or water away enter the PTC, PTC materials it may break due to insulation breakdown of the material itself. breakdown of the material itself.
   4. Don't change PTC at your convenience. Don't disassemble PTC and mold. If the exterior to the PTC-starter is damaged, resistance value is altered and it may cause poor starting of the compressor motor may cause motor may cause.
   5. Use a properly fixed PTC.

OLP-OVERLOAD PROTECTOR

1. Definition of OLP
   1. OLP (OVER LOAD PROTECTOR) is attached to the Hermetic Compressor and protects the Motor by cutting off current in Compressor Motor in case of over-rising temperature by Bimetal in the OLP.
   2. When over-voltage flows to Compressor motor, the Bimetal works by heating the heater inside the OLP, and the OLP protects Motor by cutting off current which flows to the Compressor Motor.
2. Role of the OLP
   1. The OLP is attached to the Hermetic Compressor used for the Refrigerator and Show Case and prevents the Motor Coil from being started in the Compressor.
   2. Do not turn the Adjust Screw of the OLP in any way for normal operation of the OLP.(Composition and connection Diagram of OLP).

TROUBLE SHOOTING

SERVICE DIAGNOSIS CHART

TROUBLESHOOTING CHART

LEAKAGE DETECTION WORK FLOW

GENERAL OPERATION ON COOLING CIRCUIT

MAIN EQUIPMENT AND MATERIAL

No.	Equipment or Material	Figure	No.	Equipment or Material	Figure
1	Pincer		7	Potable Gas Charge Machine
2	Welding Torch		8	Electronic Scale
3	Welding Material: Wire Solder( Ag, Cu, Al) Flux		9	Leak detector: R134a 3.4g/Year R600a 2.0g/Year
4	Material: R134a, R600a, N2, O2, C2H2		10	LOKRING
5	Pressure Gauge		11	LOKRING GLUE
6	Vacuum Pump		12	LOKRING PLIER

PRELIMINARY OPERATIONS BEFORE REPAIRING CYCLE

• Before undertaking any repair operation, it is necessary to perform the following preliminary operations:
• Disconnect power cord from the wall socket; Check electric safety of product.
• Using a leak detector suitable for hydrocarbons (HC) check for leaks in the motor compartment area. Avoiding R600a /R290 leaks to form safety accident.

Do not bring free flames and don t' smoke near the motor compartment, before the refrigeration circuit is properly emptied of R600a/R290.

REPAIR PROCESS
Before undertaking any operations concerning the refrigerating equipment, it is ABSOLUTELY NECESSARY to empty the refrigeration circuit following the instructions given in the following paragraph. The producer disclaims any responsibility in case of lack of application or partial application of such instructions.

1. Opening of refrigeration circuit

   1	Move the product outside (or at least to a well aired area), in order to avoid stagnations in closed areas of the gas leaking when the circuit is opened
   2		Cut the capillary tube 5 mm from the dryer Plug in the unit, the compressor runs and the refrigerant flows out. Leave the compressor running for 5 Leave the compressor running for 5 minutes, then unplug the unit, gently shake the compressor, allowing a small quantity of refrigerant which is dissolved in oil to be released from the frozen oil. After 3 minutes, once again, plug in the unit and leave the compressor running for 5 minutes, when the refrigerant emission is completed, unplug the unit.
   3		Although the process described before is done, it is still possible to have refrigerant inside the circuit if the dryer is clogged. Cut the pipe from condenser 5mm from the dryer using only orbital tube cutters, the refrigerant outgoing and till emission is completed. This process must last 15 minutes. Terminal to It is forbidden to take off the pipe by welding method. be cut Otherwise an explosion occurs due to flammable refrigerant (R600a/R290) inside the circuit.
   4		Cut the compressor service pipe using only orbital tube cutters. Plug in the unit and leave the compressor running. Check that there is suction from the service pipe and blow from the condenser pipe (if there aren't, the compressor is faulty). Wait around 15 minutes until the inner d 15 pressure is equal to the atmospheric pressure and the refrigerant emission is completed.

2. Repair of refrigeration circuit
   After ensuring the refrigerant has been removed completely from the refrigeration circuit, the repair can be carried out in the same way used for a standard circuit.
   
   during welding operations, take care not to damage the electrical wiring: possible short circuit with ensuing electrical discharges may cause fire.
   Sealing operations by means of brazing are allowed only if no R600a/R290 is inside the circuit. Once the circuit is charged with propane the sealing of the process tubes must be performed WITHOUT WELDING TORCHES

   5

   Braze one-way valve to joint charging tube, connect the joint of the flexible gas hose of the Nitrogen tank to the one-way valve and insufflate pressurized N2 gas at 15 bars for 10-15 seconds and check that gas is coming out from capillary tube (low pressure side) and condenser pipe (high pressure side) normally. Stop to insufflate N2 gas, wait that the gas emission is completed, then seal the capillary tube and the condenser pipe. I Insufflate N2 gas again until pressure reaches 12 bar and check the leakage point in the circuit by using an electronic leak detector. After found out the leakage point, cut the capillary tube and the condenser pipe and wait until N2 gas emission is completed. Make a new brazing in the leaking joint. Insufflate N2 gas from the compressor charging tube to clean the circuit inside, the gas will come out from capillary tube and condenser pipe. This process must last 15 seconds process must last 15 seconds. Exchange dryer: R134a Dryer(XH-7), R600a Dryer(XH-9)

3. Air removal from the circuit (vacuum process) and refrigerant charge
   The degree of vacuum to be performed in refrigeration circuit which use R600a/R290 is the same used for traditional circuit using HFC (R134a, R404A, etc).
   At the end of the vacuum operation the value to be reached for vacuum is 14 Pa (0,14 mbar = 100 mmHg): this value is normally reached after 20 minutes from connection of the vacuum pump to the circuit.
   Always use charge devices suitable for hydrocarbons (HC) refrigerant.
   The refrigeration circuit provided with the equipment must be charged with 99.5% pure gas (R600a/R290).
   The amount of refrigerant to be used is shown on the technical data plate; during charge operation the weight of the refrigerant must e ou o e ge o be used s s ow o be accurately controlled: for optimum operation of the unit the quantity of refrigerant charged must be within a tolerance of ± 5%
   Note: please check the dryer dimensions, as dryers with bigger volumes require additional refrigerant.
4. Sealing
   Use electronic leak detector to check for possible leaks from the one way valve
   

EXPLODED VIEW

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