NuAire NU-99338JE Service Manual
  1. Manuals
  2. Brands
  3. NuAire Manuals
  4. Freezer
  5. NU-99338JE
  6. Service manual

NuAire NU-99338JE Service Manual

Ultra low temperature freezer
Hide thumbs Also See for NU-99338JE:

Advertisement

Table of Contents

NuAire Ultra Low Temperature Freezer Service Manual
OM0290
NuAire Ultra Low Temperature Freezer
Service Manual
Model
Picture
NU-99338JE/338JG/338JGA
NU-99486JE
NU-99578JE/578JGA/578JGA
NU-99728JE/728JGA/728JGA
NU-99828JE/828JG
NU-99420JE
NU-99420JG
OM0290 Revision 2
May/2020
Page 1 of 60
Release Date:5/20/2020

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the NU-99338JE and is the answer not in the manual?

Questions and answers

Related Manuals for NuAire NU-99338JE

Summary of Contents for NuAire NU-99338JE

  • Page 1 NuAire Ultra Low Temperature Freezer Service Manual OM0290 NuAire Ultra Low Temperature Freezer Service Manual Model Picture NU-99338JE/338JG/338JGA NU-99486JE NU-99578JE/578JGA/578JGA NU-99728JE/728JGA/728JGA NU-99828JE/828JG NU-99420JE NU-99420JG OM0290 Revision 2 May/2020 Page 1 of 60 Release Date:5/20/2020...

  • Page 2: Table Of Contents

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 1 Contents 1. Contents ........................2 2. Product Characteristics and Model Meaning ............3 3. Product Promotionial Points ..................4 4. Product Appearance Structure & Internal Structure Diagram ........5 5.Product Component Structure & Names ..............6 6.

  • Page 3: Product Characteristics And Model Meaning

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 2 Product Characteristics and Model Meaning 2.1. Main Functions and Characteristics of the Product 2.1.1. The applicable temperature scope in the ultra-low temperature freezer is -40~-86℃; 2.1.2. The freezer has the balanced internal and external pressure design and its doors can be opened and closed easily;...

  • Page 4: Product Promotionial Points

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 3. Product Promotional Points 3.1 Temperature Control: The temperature is controlled by computer and displayed digitally, its adjustment unit is 1℃ and the adaptable temperature scope is -40~-86℃; 3.2 Safety Control: 3.2.1 Multiple failure alarm (high/low temperature alarm, sensor alarm, door opening alarm, hot condenser alarm, improper ambient temperature alarm, improper voltage alarm, low battery capacity alarm and power failure alarm);...

  • Page 5: Product Appearance Structure & Internal Structure Diagram

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 4. Product Appearance Structure & Internal Structure Diagram Energy saving series: NU-99486JE NU-99578JE/578JGA/578JGA NU-99728JE/728JGA/728JGA NU-99828JE/828JG Front View Internal Structural View Rear View Slim line series： NU-99338JE/338JG/338JGA Front View Internal Structural View Rear View Chest series ：...

  • Page 6: Product Component Structure & Names

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 5. Product Component Structure & Names 5.1 Display: NU-99486JE NU-99578JE/578JGA/578JGA NU-99420JE NU-99420JG NU-99728JE/728JGA/728JGA NU-99828JE/828JG NU-99338JE/338JG/338JGA NU-99420JE NU-99420JG High temp. alarm Silence alarm Low temp. Probe alarm failure Locked battery Network condenser Regulator...
  • Page 7 NuAire Ultra Low Temperature Freezer Service Manual OM0290 5.2.1 Cabinet Structure External door：PU foam with Inner door：PU foamed External door seals can be replaced. Inner door latch：remove the side screws when replaced Inner door seals can be replaced. One piece...
  • Page 8 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Internal door External door Balance sealing strip handle hole Foam internal door External door Magnetic control switch box for sealing strip door opening alarm Internal door handle Threading hole at the back of the...
  • Page 9 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Electric cabinet：N 5.3.1 U-99486JE NU-99578JE/578JGA/578JGA NU-99728JE/728JGA/728JGA NU-99828JE/828JG NU-99338JE/338JG/338JGA Remote alarm Control terminal board RS-232/485Port Location (Not Shown) Condenser fan Battery charge switch Power switch High temp stage Relay Battery Low temp stage...
  • Page 10 NuAire Ultra Low Temperature Freezer Service Manual OM0290 USB signal Connector Temperature Board check button: press this button to adjustment connector for display observe if all relay lights will take turn to screw board light up. Voltage calibration screw Door alarm...
  • Page 11 NuAire Ultra Low Temperature Freezer Service Manual OM0290 5.3.2 Junction box: NU-99420JE NU-99420JG Battery Control board Compressor relay USB power board Terminal strip Filter Battery switch Remote alarm Power switch RS-232/485Port contacts Location (Not Shown) OM0290 Revision 2 May/2020 Page 11 of 60...
  • Page 12 NuAire Ultra Low Temperature Freezer Service Manual OM0290 5.4 Refrigeration 5.4.1 Refrigeration System :NU-99486JE NU-99578JE/578JGA/578JGA NU-99728JE/728JGA/728JGA NU-99828JE/828JG NU-99338JE/338JG/338JGA High stage Perimeter halo liquid tube accumulator High Temp stage condenser High temperature filter dryer Low temp stage oil separator temperature filter dryer...
  • Page 13 NuAire Ultra Low Temperature Freezer Service Manual OM0290 5.4 .2 Refrigeration system: NU-99420JE NU-99420JG High temperature compressor High stage liquid High stage filter accumulator dryer Condenser Condenser temperature compressor Low temperature stage filter dryer separator OM0290 Revision 2 May/2020 Page 13 of 60...

  • Page 14: Product Use Introduction & Product Improvement Introduction

    6.3.8 If the machine does not cool down after power is on for 2-3 hours, please switch off the power supply and contact Nuaire technical support as soon as possible. 6.3.9 In case of an alarm failure or other failures, please clear the failure according to the instruction on the display panel.
  • Page 15 NuAire Ultra Low Temperature Freezer Service Manual OM0290 6.4 Failure Code Inquiry 1) When the machine detects that the result of the condenser temperature minus the ambient temperature is ≥13℃ (for 5min. continuously), the “hot condenser” indicator turns on and the machine makes the relevant silence alarm.
  • Page 16 NuAire Ultra Low Temperature Freezer Service Manual OM0290 The heat exchanger probe foams at the bottom inside the freezer. E3 at the terminal of the heat exchanger sensor 7) When the temperature detected by the heat exchanger sensor is ≥90℃, the alarm displays E4.
  • Page 17 NuAire Ultra Low Temperature Freezer Service Manual OM0290 温度 阻值 温度 阻值 温度 阻值 Tempera Resistan Tempera Resistan Tempera Resistan ce (Ω) ce (Ω) ce (Ω) ture (℃) ture (℃) ture (℃) （℃） （Ω） （℃） （Ω） （℃） （Ω） -140 43.9 72.3...

  • Page 18: Main Technical Parameters Of The Product

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 7.Main Technical Parameters of the Product 7.1 Technical Parameter Table NU-99578 NU-99578 NU-99578 NU-99728 NU-99728 NU-99338 NU-99338 NU-99338 Model Technical Data Cabinet Type Single Door, Upright Climate Class Controller Micro-processor control Display...
  • Page 19 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Model NU-99828JE NU-99828JG Technical Data Cabinet Type Single door, upright Climate Class Controller Microprocessor control Display LED Display with 1 C increment Temp Sensor PT100 Parameters Capacity(L) Power Supply（V/Hz） 220~240V/50Hz 208~230V/60Hz Power（W）...
  • Page 20 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Model NU-99420JE NU-99420JG Technical Data Cabinet Type Single door, chest Climate Class Controller Microprocessor control Display LED Display with 1 C increment Temp Sensor PT100 Parameters Capacity(L) Power Supply（V/Hz） 220~240V/50Hz 208~230V/60Hz Power（W）...
  • Page 21 NuAire Ultra Low Temperature Freezer Service Manual OM0290 7.2 Product Nameplate For example NU-99338JG OM0290 Revision 2 May/2020 Page 21 of 60 Release Date:5/20/2020...

  • Page 22: Case Prevention Measures, Product Use And Daily Maintenance Knowledge

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 8. Case Prevention Measures, Product Use and Daily Maintenance Knowledge 8.1 Refrigeration Principle of ULT Freezer: The ultra-low temperature freezer is equipped with a cascade refrigerating system normally composing of two or more refrigerating systems, i.e. a low temperature stage and high temperature stage. For the high temperature stage, the medium-temperature refrigerant is used;...
  • Page 23 NuAire Ultra Low Temperature Freezer Service Manual OM0290 8.5 Refrigerant Charging Process: 8.5.1 Preparation 1) Refrigerant (R290 and R170.) 2) Hansen valve 3) Standard electronic scale (error ≤±2g) 4) Vacuum pump (≥4L) 5) Pressure gauge (high and low pressures shall be read at the same time) See Fig. 1.
  • Page 24 NuAire Ultra Low Temperature Freezer Service Manual OM0290 8.5.4 Charging Refrigerant 1) High temperature level perfusion, machine should be in stop state, reperfusion, refrigerant R290 perfusion measure implemented according to the attached form! 2) When the low temperature refrigerant is filled, the machine shall also be off. Firstly, fill R290 refrigerant and then fill R170 refrigerant, and also the HRB refrigerant pressure shall be higher.

  • Page 25: Schematic Diagram And Wiring Diagram Of The System

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 ULT Full Series Refrigerant Charge Gas a Gas b Power Supply 1 stage(g) 2 stage(g) Model （ V/Hz） R290 R290 R170 NU-99338JE 220~240V/50Hz NU-99338JG 208~230V/60Hz NU-99338JGA 115V60Hz NU-99486JE 220~240V/50Hz NU-99578JE 220~240V/50Hz NU-99578JG...
  • Page 26 NuAire Ultra Low Temperature Freezer Service Manual OM0290 9.1 Circuit Diagram OM0290 Revision 2 May/2020 Page 26 of 60 Release Date:5/20/2020...

  • Page 27: Specific Control, Work Principle And Parameters

    OM0290 10. Specific Control, Work Principle and Parameters Nuaire ULT’s have the temperature control system with a LED computer panel for controlling the switch-on/off state of the compressor. 10.1 Temperature control system with a LED computer panel for controlling the switch-on/off state of the compressor 1) In order to regulate the set value, firstly unlock the machine.
  • Page 28 NuAire Ultra Low Temperature Freezer Service Manual OM0290 A. “High temperature indicator: if the indicator turns on, the alarm will be displayed because the temperature in the freezer is higher than the maximum temperature set value; B. “Low temperature indicator: if the indicator turns on, the alarm will be displayed because the temperature in the freezer is lower than the minimum temperature set value;...
  • Page 29 NuAire Ultra Low Temperature Freezer Service Manual OM0290 10.4 Battery Control Requirement: There is a battery power switch on the equipment, and the switch shall be opened before normal startup. As soon as the AC power required by the equipment is switched on, the equipment will enter the normal working state.
  • Page 30 NuAire Ultra Low Temperature Freezer Service Manual OM0290 10.8 Compressor Control When power is just switched on, the time will delay according to the setting of the user (the default delay is 1min.). If the freezer meets the switch-on condition, the high temperature compressor will be started.
  • Page 31 NuAire Ultra Low Temperature Freezer Service Manual OM0290 button or "▽" button to display circularly from 01 to 12, after selecting the current month, press the "SET button to save. Thereafter, the inside temperature display area steadily shows "3P"; press "SET"...

  • Page 32: Refrigeration Cycle Prospective And Plan

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 11. Refrigeration Cycle Prospective and Plan 11.1 Refrigeration Principle The ultra-low temperature freezer is equipped with a cascade refrigerating system normally composing of two or more refrigerating systems, i.e. low temperature stage and high temperature stage. For the high temperature stage, the medium-temperature refrigerant is used;...

  • Page 33: Installation & Disassembly Process

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 12. Installation & Disassembly Process 12.1 Installation Position 12.1.1. Prevented from direct sunshine 12.1.2. Good surrounding air ventilation condition 12.1.3. Prevented from a lot of dust 12.1.4. Prevented from mechanical vibration or shock 12.1.5.
  • Page 34 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Fastener Fastener Fastener A 12.3 The Product Enters the Placement Room. 12.3.1 Difficulty in entering the door: If it is impossible to enter the room without the pallet because of the door height in the room where the user wants to place the refrigerator, the user can consider disassembling the front cover of the compartment and open the external door by 180º.

  • Page 35: Typical Troubles & Solutions And Common Q&A

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 ③Open the external door by 180º. After the product enters the door, assemble the front cover of the compartment to its original condition. Note: The front cover shall be reassembled in place. Otherwise, safety and performance...
  • Page 36 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Our machine refrigerates from top to bottom, so the temperature at the top is lower than the temperature at the bottom, the difference between the upper and lower temperatures is large, the temperature difference of similar international products is 5~8ºC, and the temperature difference of our products is...
  • Page 37 NuAire Ultra Low Temperature Freezer Service Manual OM0290 13.2 Common Q&A Question Reason Analysis Maintenance Measures Use the multi-meter to measure the switch or fuse 1. Power switch or fuse failure resistance and check if the switch is damaged. If so, replace the fuse or power switch.
  • Page 38 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Check if any fan blade collides the wall, makes noise and 2. The fan blade is blocked by not equipped when it rotates, troubleshoot the blade and foreign matters. remove surrounding foreign matters and keep the blades running normally.
  • Page 39 NuAire Ultra Low Temperature Freezer Service Manual OM0290 1. Open the front grille and clean the filter screen. When result condenser temperature 9. Hot 2. Check if the condenser probe is too close to the outlet detected condenser condenser of the condenser.
  • Page 40 NuAire Ultra Low Temperature Freezer Service Manual OM0290 High Temperature Alarm Solution: Freezer display temp ≥set temp. for high temp. alarm (set temp. for high temp. alarm≥set No (normal) temp. for running +5℃) Check the control circuit and LED lamps on the The “Alarm”...
  • Page 41 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Low Temperature Alarm Solution: Freezer display temp.≤ set temp. for low temp. alarm (set temp. for low temp. alarm ≤ set temp. for running No (normal) -5℃) The “Alarm” indicator flickers; The Check the control circuit and LED lamps on the “Low-temp.
  • Page 42 NuAire Ultra Low Temperature Freezer Service Manual OM0290 "E0" Alarm Solution OM0290 Revision 2 May/2020 Page 42 of 60 Release Date:5/20/2020...
  • Page 43 NuAire Ultra Low Temperature Freezer Service Manual OM0290 "E1" Alarm Solution OM0290 Revision 2 May/2020 Page 43 of 60 Release Date:5/20/2020...
  • Page 44 NuAire Ultra Low Temperature Freezer Service Manual OM0290 "E2" Alarm Solution OM0290 Revision 2 May/2020 Page 44 of 60 Release Date:5/20/2020...
  • Page 45 NuAire Ultra Low Temperature Freezer Service Manual OM0290 "E3" Alarm Solution OM0290 Revision 2 May/2020 Page 45 of 60 Release Date:5/20/2020...
  • Page 46 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Solution to "Fans fail to work" OM0290 Revision 2 May/2020 Page 46 of 60 Release Date:5/20/2020...
  • Page 47 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Solution for checking high-temperature compressor failing to start up OM0290 Revision 2 May/2020 Page 47 of 60 Release Date:5/20/2020...
  • Page 48 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Solution for checking low-temperature compressor failing to start up OM0290 Revision 2 May/2020 Page 48 of 60 Release Date:5/20/2020...
  • Page 49 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Solution to condenser alarm fault OM0290 Revision 2 May/2020 Page 49 of 60 Release Date:5/20/2020...
  • Page 50 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Solution to display panel NG fault OM0290 Revision 2 May/2020 Page 50 of 60 Release Date:5/20/2020...

  • Page 51: Post-Maintenancenormal Cooling Curve Data Of Refrigeration System

    NuAire Ultra Low Temperature Freezer Service Manual OM0290 14. Post-maintenance normal cooling curve data of refrigeration system To guarantee that the post-refrigeration-system-maintenance performance data of ultra-low temperature products can meet the original design requirements, please compare the Layer-3 central cooling rate of the product when system maintenance is over (While ambient temperature ranges from 22 ℃...
  • Page 52 NuAire Ultra Low Temperature Freezer Service Manual OM0290 15. Explosive view of spare parts 15.1 Enclosure 15.1.1 model NU-99578JE/578JGA/578JG/728JG/728JE/828JG/828JE ： Serial NU-99578JE NU-99828JE NU-99728JE numbers Name of parts NU-99828JG NU-99728JG NU-99578JG/JGA of spare parts Shelf 0270100590 0270101535 0270101712A Shelf strip...
  • Page 53 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Inner seal of outer 0270200590B 0270200651 0270200652A door 0270803800 0270801320 0270803633 （Produced after （Produced after （Produced after External door 2018.1.12） 2018.1.12） 2018.1.12） Upper holder display panel cover 0270100565 Lower holder display panel cover...
  • Page 54 NuAire Ultra Low Temperature Freezer Service Manual OM0290 door Inner seal for outer 0270200590C door 0270803416 Outer door （after 2018.1.12） Upper holder display panel cover 0270100565（same with NU-99490J） Lower holder display panel cover Vacuum relief valve 0270803613 Display panel 0270200161 (before 2018.1.11)
  • Page 55 NuAire Ultra Low Temperature Freezer Service Manual OM0290 Part Power Part Name Part No. Change Recod Supply Electric box Universal 0270101784 Control board Universal 0271800023 drive board Universal 0270101361 holder USB drive board Universal 0271800064 Terminal blocks Universal 0274300007 220V...
  • Page 56 NuAire Ultra Low Temperature Freezer Service Manual OM0290 15.3 Refrigeration Compartment OM0290 Revision 2 May/2020 Page 56 of 60 Release Date:5/20/2020...
  • Page 57 NuAire Ultra Low Temperature Freezer Service Manual OM0290 NU-99578J NU-99338JE/338JGA/ NU-99728J NU-99828J NU-99486JE E/578JGA/ Part Name 338JG G/728JE G/828JE 578JG Left cover of cabin 0270100778A 0270102117 0270101762A 0270101594 Front cover of cabin 0270101206E 0270102114AE 0270101721C 0270101560E Filter screen 0270102159 0270102160...
  • Page 58 NuAire Ultra Low Temperature Freezer Service Manual OM0290 15.4 NU-99420JE/JG OM0290 Revision 2 May/2020 Page 58 of 60 Release Date:5/20/2020...
  • Page 59 NuAire Ultra Low Temperature Freezer Service Manual OM0290 QTY for per Item S/N Part Name Part No. Unit unit Door assembly 0270804024 Handle 0270200092 Inner seal for outer door 0270200434A Internal door 0270802766 Hinge 0270100099 Lock latch plate 0070106913 Leveling leg...

This manual is also suitable for:

Nu-99338jgNu-99338jgaNu-99486jeNu-99578jeNu-99578jgaNu-99728je ... Show all

Table of Contents