Contents General Description ................... 11 1.1 Coding Principle..................12 1.2 The main features ................. 12 1.3 Technical Specifications ............... 14 1.3.1 Specifications ................14 1.3.2 Technical Specifications.............. 16 1.3.3 Drying Capacity ................17 1.4 Safety Regulations................19 1.4.1 Safety Regulations for the Blowers ..........19 1.4.2 Notes of using material storage bin of optional grade (MST-80U-OP) ..................
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2.6.9 Material Stage Bin of Optical Grade MST-80U-OP ..... 46 2.6.10 High-efficiency Filter HEPA ............47 2.6.11 Important notices for using SHR-CP-3U........48 2.7 Electrical Diagram................. 49 2.7.1 Electrical Diagram (400V) ............49 2.7.2 Main Circuit (PCB) (400V) ............51 2.7.3 Control Circuit (PCB) (400V) ............
Read this manual carefully before operation to prevent damage of the machine or personal injuries. SCD series dehumidifying dryer gathers dehumidification, drying and two-stage conveying three functions, is very suitable for drying engineering plastics materials with hygroscopicity such as PA, PC, PBT, PET. Of them is Optics SCD could be used in processing application of lens, LCD backlight board and discs, it has dew-point of below -40℃under ideal condition.
1.1 Coding Principle xxxU xxxH Option * Dehumidifying Air Quantity ( H: Honeycomb Rotor Hopper Capacity (L) U: European Type Shini Compact Dryers Note:* LC=PLC+HMI D=Dew-point Monitor OP=Optical Class P=For Polished Hopper Inside M2=Three-stage Conveying H=180℃ High Temperature ES=Eneryg-saving 1.2 The main features Standard configuration 1) Combine the function of dehumidifying, drying and two-stage conveying into single unit.
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Chapter 6, which contains service instructions intended for service engineers. Other chapters contain instructions for the daily operator. Any modifications of the machine must be approved by SHINI in order to avoid personal injury and damage to machine. We shall not be liable for any damage caused by unauthorized change of the machine.
PMMA IONOMER PA6/6.6/6.10 PA11 PA12 PETG PMMA PS(GP) SAN(AS) Note: 1. Please refer to above drying capacity of SCD machine, select the right model according to material usage of processing machine. Please consult Shini service staff for model selection. 17(202)
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IONOMER PA6/6.6/6.10 PA11 PA12 1062 PETG PMMA PS(GP) SAN(AS) Note: 1. Please refer to above drying capacity of SCD machine, select the right model according to material usage of processing machine. Please consult Shini service staff for model selection. 18(202)
1.4 Safety Regulations 1.4.1 Safety Regulations for the Blowers 1) Under normal operation, the blowers will generate high temperature. Do not touch blower's case to avoid any physical injury. 2) Under normal operation, the blower motor's current loading will increase or reduce according to air pressure's change accordingly.
1) Check whether internal bin and connecting pipe are clean or not before using. 2) Using equipped with HEPA and model of optional grade series. 3) If customer do not equip with HEPA, filter with accuracy of 5um is available, which is installed inside storage bin.
with accuracy of 0.3um. Picture 1-4:High-efficiency filter Important notices for using SHR-CP-3U 1.4.4 1) Check whether the feed-in pipes are clean before using. 2) The screener needs regular cleaning, once a week is recommended. 3) The glass tube and the packing are consumables. Be careful when using and back up is necessary.
1.4.5 Safety Signs and Labels Danger! High voltage danger! This label is stuck on the electrical boxes. Attention! This label means that this area should be taken care! Warning! High temperature, take care of hands! This label should be stick to the shell of heater. Attention! No need for regular inspection because all the electrical parts in the control unit are fixed tightly!
1.4.6 Transportation and Storage of the Machine Transportation 1) SCD series "All-in-one" compact dryers are packed in crates or plywood cases with wooden pallet at the bottom, suitable for quick positioning by fork lift. 2) After unpacked, castors equipped on the machine can be used for ease of movement.
Shini (including employees and agents). Shini is exempted from liability for any costs, fees, claims and losses caused by reasons below: 1. Any careless or man-made installations, operation and maintenances upon machines without referring to the Manual prior to machine using.
Structure Characteristics and Working Principle 2.1 Working Principle Dehumidifying: damp and hot air from dry material barrel is blown into rotor after cooled. Moisture from the air is absorbed by rotor and is then adsorbed by regeneration heating air. Two strands of airflow function on the rotor. And with the rotation, moisture from the air is absorbed and expelled after absorbed regeneration air to form stable low dew-point air, which is dried to the drying temperature and then is blown into material barrel to closed circle to dry...
2.3 Why Choose "All-in-One" Compact Dryer It is proved that the hygroscopic materials used in the plastics industry such as PC, PA, PBT, PET, Nylon, etc. cannot be dried effectively by conventional hot air drying systems because those systems depend on ambient conditions and are relatively inefficient in reducing moisture contents.
2.6 Drawing and Parts List Structural Drawing 2.6.1 Names of Parts: 1. Conveying blower 2. Process blower 3. Process heater 4. Return-air filter 5. Regenerating heater 6. Honeycomb-rotor 7. Regenerating filter8. After cooler 9. Regenerating blower 10. Drying hopper 11. Material line 12.
2.6.2 Assembly Drawing (Fully-integral design) Remarks: Please refer to material list 2.7.3 for specific explanation of the Arabic numbers in parts drawing. Picture 2-5:Assembly Drawing (Fully-integral design) 29(202)
2.6.3 Parts List (Fully-integral design) Table 2-1:Parts List (Fully-integral design)(SCD-20U/30H~40U/50H) Part No. Description 20U/30H 40U/30H 40U/50H Sight-glass window Sight-glass window retainer Hopper fixing plate Hopper top cover Insulated hopper Shut-off valve BY10203800050 BY10203800050 BY10203800050 Locking pin assembly Front door frame Front door plate Front door key YW00717100000...
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Part No. Description 20U/30H 40U/30H 40U/50H Conveying blower* BM30031000150 BM30031000150 BM30031000150 Bottom plate Outer side plate Pole A Pole B Right side plate Rear plate at the bottom Rear plate at the top Rear plate cover Rear plate Rear plate bar Rear plate lower cover Filter ** YR50128300000...
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Table 2-2:Parts List (Fully-integral design)(SCD-80U/50H~160U/120H) Part No. Description 80U/50H 120U/80H 160U/120H Sight-glass window Sight-glass window retainer Hopper fixing plate Hopper top cover Insulated hopper Shut-off valve BY10163800250 BY10163800250 BY10163800250 Locking pin assembly Front door frame Front door plate Front door key YW00717100000 YW00717100000 YW00717100000...
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Part No. Description 80U/50H 120U/80H 160U/120H Bottom plate Outer side plate Pole A Pole B Right side plate Rear plate at the bottom Rear plate at the top Rear plate cover Rear plate Rear plate bar Rear plate lower cover Filter ** YR50708000100 YR50708000100...
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Table 2-3:Parts List (Fully-integral design) (SCD-230U/120H~300U/150H) Part No. Description 230U/120H 230U/150H 300U/150H Sight-glass window Sight-glass window retainer Hopper fixing plate Hopper top cover Insulated hopper Shut-off valve Locking pin assembly Front door frame Front door plate Front door key YW00717100000 YW00717100000 YW00717100000 Front door plate (left)
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Part No. Description 230U/120H 230U/150H 300U/150H Bottom plate Outer side plate Pole A Pole B Right side plate Rear plate at the bottom Rear plate at the top Rear plate cover Rear plate YM50616400100 YR50708000100 YM50616400100 Rear plate bar YE32051800300 YE32051800300 Rear plate lower cover YE31325000200...
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Table 2-4:Parts List (Fully-integral design) (SCD-300U/200H~450U/200H) Part No. Description 300U/200H 450U/200H Sight-glass window Sight-glass window retainer Hopper fixing plate Hopper top cover Insulated hopper Shut-off valve Locking pin assembly Front door frame Front door plate Front door key YW00717100000 YW00717100000 Front door plate (left) YW03000300200 YW03000300200...
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Part No. Description 300U/200H 450U/200H Outer side plate Pole A Pole B Right side plate Rear plate at the bottom Rear plate at the top Rear plate cover Rear plate YM50616400100 Rear plate bar YE32051800300 Rear plate lower cover YE31325000200 Filter ** YR50708000100 YR50181100000...
2.6.4 Assembly Drawing (Semi-integral design) Remarks: Please refer to material list 2.7.5 for specific explanation of the Arabic numbers in parts drawing. Picture 2-6:Assembly Drawing (Semi-integral design) 38(202)
2.6.5 Parts List (Semi-integral Design) Table 2-5:Parts List (Semi-integral Design)(SCD-450U/300H~750U/400H) Part No. Description 450U/300H 600U/300H 600U/400H 750U/400H Castor YW03000400200 YW03000400200 YW03000400200 YW03000400200 Base frame welding ring Castor brake YW03000400000 YW03000400000 YW03000400000 YW03000400000 Front pole Right lower side plate Rear pole Upper side plate Side fixing beam Rear bottom plate...
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Part No. Description 450U/300H 600U/300H 600U/400H 750U/400H Cooler BW88304000020 BW88304000020 BW88304000020 BW88304000020 Regenerated fan fixed beam Cooler * YR40120300000 YR40120300000 YR40120300000 YR40120300000 Fixed beam of cooler Erect beam of base frame Bottom mounting beam Cross-beam of base frame Control trunk BH36300200050 BH36603000150 BH36604000050 BH36754000050 Filter** YR50203000000 YR50203000000 YR50203000000 YR50203000000...
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Table 2-6:Parts List (Semi-integral Design) (SCD-750U/500H~1200U/700H) Part No. Description 750U/500H 900U/500H 900U/700H 1200U/700H Castor YW03000400200 YW03000400200 YW03000400200 YW03000400200 Base frame welding ring Castor brake YW03000400000 YW03000400000 YW03000400000 YW03000400000 Front pole Right lower side plate Rear pole Upper side plate Side fixing beam Rear bottom plate Rear top plate Cover board...
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Part No. Description 750U/500H 900U/500H 900U/700H 1200U/700H Regenerated fan fixed beam Cooler * YR40120300000 YR40120300000 YR40120300000 YR40120300000 Fixed beam of cooler Erect beam of base frame Bottom mounting beam Cross-beam of base frame Control trunk BH36754000050 BH36905000350 BH36900700050 BH36120000350 Filter** YR50181100000 YW72253600000 YW72253600000 YW72253600000 Filter cover Butterfly nut...
2.6.9 Material Stage Bin of Optical Grade MST-80U-OP Name of components: 1. Brake-type universal floor stand 2. Free-style universal floor stand 3. Floor stand 4. Inner hexagonal screw column 5. 1.5” Elbow 6. Seal ring 1.5” 7. 1.5” Fast pipe connector 8.
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Symbol Name Specifications Part No. FAN* 220V-240VAC 40W YM60121200400 Blower** 220-240V/380-415V 1.5kW BM30042000050 Blower** 220-240V/380-415V 0.4kW BM30020500050 Blower** 220-240V/380-415V 1.5kW BM30042000050 Motor* 200-240VAC 0.006kW YM50600600000 Heater** 220-240V/380-415V 12kW BH70307200050 Heater** 220-240V/380-415V 5.4kW BH70200400050 * means possible broken parts. ** means easy broken part. and spare backup is suggested. Please confirm the version of manual before placing the purchase order to guarantee that the item number of the spare part is in accordance with the real object.
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Table 2-16:Electrical Components List (PCB)(SCD-450U/600U-300H) (400V) Symbol Name Specifications Part No. Main switch* YE40636300000 Circuit-breaker YE40634000000 Excitation break away 220VAC-240VAC YE40000900000 Contactor** 230VAC 50Hz YE00301000000 Contactor** 230VAC 50Hz YE00301000000 Contactor** 230VAC 50Hz YE00300000000 Contactor** 230VAC 50Hz YE00340000000 Contactor** 230VAC 50Hz YE00320000000 Relay 230VAC 50Hz 5A...
2.7.15 Main Electrical Components Description Overload Relay At delivery, the overload relay is set for mannual reset. (The reset button pointing to H). Manually reset the relay at the tripping of the switch. When motor overload occurs, stop the machine, then check and solve the problem. After that open the door of control box, press down the reset button of overload relay (if you can not press down the reset button, wait for one minute.) ⑥...
2.8 Operation Procedures Before connecting electrical power source, the main power switch must be turned to OFF position. After the machine connected with power source, turn the main power switch to ON position. According to your applications, operate drying and loading system respectively. 2.8.1 Operation Regulations Picture 2-30:Operation Regulations 1) Do not use keen-edged object instead of hands to operate the touch screen,...
Picture 2-31:Description of touch screen A:Display B:Touch panel C:LED status indicator 2.8.3 Touch panel appear error Table 2-55:Touch panel information XBT GT State indicator light Green (light) Work welled Orange (light) Backlight lamp burning Orange (shine) During software startup Red (light) Power status No shine Power break off...
Picture 2-32:Screen operation flow Table 2.8.5 Menu particular 1) System Default System When the system is connected with AC power source, turn it on and then the initial default screen will be displayed as shown below. By touching the button of "English"...
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2) Drying Process Screen Drying Process screen as shown below: Drying process switch Title bar Drying hopper 1 setting key Process blower indicator Th e actual value of the drying hopper 1 Re generating blower indica tor Drying hopper 2 setting key Process heater 1 indicator Th e actual value of...
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Picture 2-35:Conveying Process Screen 3) Temperature Parameters Setting Touch parameter setting button. Input user name: Shini, Input passwords 3588 Press "ENTER" button to confirm, and then "RETURN" key Return " dry monitor screen." Again by "parameter settings" button, you can enter the parameter settings.
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Warning! Please keep this password securely and safely. If the password is missing, then the operator won't be able to log into the system parameter setup screen. It is better to let this password known only by system administrator or senior operator. After input correct password, the screen will show the following "temperature parameter setting"...
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numeric keypad will pop up. Input a new parameter and press "ENTER" to confirm the new parameter. Picture2-59:Temperature Parameters Setting 4 MAX. and MIN. max. and min. display area of the numeric keypad shows max. and min. setting value of present parameter. If setting value exceeds the limits, it would be invalid to press "ENTER".
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Table 2-62:Adjustment of Differential Time (D) Regeneration Temperature Parameter Setting Touch "Regeneration PID" to set regen. temperature parameter with reference to "Process Temperature Control Parameter" setting procedures. 5) Conveying Parameter Setting By touching the "Conveying Parameter" button under the "Conveying Process" screen, the system will display a parameter setting screen.
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count material suction time simultaneously. After the set time of material conveying, system will stop material conveying and add 1 to material conveying times. Failure alarm counter Shut-off time (Unit: Second) Shut-off time refers to opening time of relative shut-off valve. The longer the shut-off time, the more material will be discharged.
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① Start-up time(hours) Start-up time(minutes) Re al-time clock setting Shutdown time (minutes) Shutdown time (hours) Picture 2-38:Time Setting 1 Note! The screen shows time 1 auto-start time only when delayed start-up function is enabled, and the screen shows time 2 extended cooling time only when the system is turned off.
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Picture 2-40:Alarm Fault Records 1. When alarm fault records are more than displaying space, by touching "Up" or "Down" keys to review more records. 2. Touching record content, a help message is prompted. According to help message, the operator could get the troubleshooting information. 3.
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Temperature control parameter Regenerating temp. Dehumidifier does not work and the wrongly set, touching pad is overheat visible alarm is flickering. malfunction, regenerating heating problem. Dehumidifier does not work and the Return air temp. overheat Insufficient cooling water. visible alarm is flickering. Process temp.
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9) Help Screen By touching "Help" button under the bottom of Drying Process or Conveying Process screen in order to enter into system help menu screen. Touching menu button to show corresponding help message as shown below: Picture 2-41:Help Screen 170(202)
3. Installation Testing 3.1 Attention 1) Make sure voltage and frequency of the power source comply with those indicated on the manufacturer nameplate, attached to the machine. 2) Power cable and earth connections should conform with your local regulations. 3) Use independent electrical wires and power switch. Diameter of electrical wire should not be less than those used in the control box.
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Notes! Keep the machine 2m from the combustible distance. Picture 3-2:Schematic drawing of installation (Fully-integral design) Picture 3-3:Schematic drawing of installation (semi-integral design) 172(202)
3.2 Honeycomb-rotor 3.2.1 What is Honeycomb-rotor The main body of the honeycomb-rotor is a honeycomb, made by ceramic fibre and organic additives, sintered under high temperature with molecular sieve and silica gel, to be strongly bonded together and form a solid and hard surface. Not like common molecular sieve, which will produce dusts and fines to pollute raw materials when aging or become saturated requiring regular replacement, honeycomb-rotor offer unlimited long life and can be cleaned when it is polluted.
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8) Fit all springs and tighten the screws (Fig. 7). 9) Install both the transmission belt (Fig. 13) and belt tension regulator (Fig. 14). 10) Install micro-switch and fixed board firmly (Fig. 10). Picture 3-5:Installation of the Rotor 174(202)
3.3 Heater Assemblies 1) Install the heating pipe in the heater. 2) Fix the heater into the housing. (See right picture) Warning! Hot surfaces could burn hands. Take care of high temperature! This label should be stick to the shell of heater. Picture 3-6:Heater Assemblies 175(202)
3.4 Installation of Blowers 3.4.1 Drying Blower 1) Fix inlet/outlet flange of blower, and tighten 4 screws securely. 2) Connect the blower with electrical source. 3) Install the blower on the Machine frame. Picture 3-7:Installation of Blowers 3.4.2 Regeneration Blower 1) Fix inlet/outlet flange of blower, and tighten 4 screws securely.
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1) Install drying hopper on the machine frame. 2) Fix the shut-off valve adaptor on the suction box. 3) Install the shut-off valve on the suction box. Picture 3-9:Installation of Drying Hopper 3.4.5 Installation of Compressed-air Filter & Regulator 1) Tighten two fixing screws. 2) Connect the compressed-air tube.
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Application and Operation Turn on the main switch to connect power supply on the control panel. 4.1 Panel Operation 1) Open the main switch. 2) Press "RUN/STOP "key to start loading. 4.2 Temperature Setup 1) The setup number will flicker after pressing "SET" key, add or decrease temperature by pressing key.
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Picture 4-1:Intermittent running setup 1 2) PV displays "0-ON" to stand for drying periods. "0-OFF" stands for machine stop time. Press key to add or decrease time value of "SV/setup value". Each press of can add or decrease 15 mins set time. 3) Press "ENTER"...
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Picture 4-3:Intermittent running setup 3 4.5 Weekly Time Start Setup 1) After setting intermittent operation type, here comes Weekly Time. Press key to add or decrease the time value in "SV/setup value " from "1-ON". Press "ENTER" to confirm the input value and comes into the time setup items of "1-OFF"...
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Picture 4-6:Weekly Time Start Setup 3 4) Press "SET" key to back to normal status, after finish all the setup. 5) Setup all the "ON" to 00:00 if it is not for weekly time start/stop. Note: 1. F-20 functions as an password lock,hold on"SET"till the"PV"displays F-20. 2.
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Picture 4-8:Weekly Time Start Setup 5 5. F-05 stands for the function of temperature protection. Alarm will be launched if actual temperature were equal to or higher than the addition of setting temperature value and setting value. This temperature range is between 0 to 50, and default value is 15.
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will display F-04. 3) F-04 are for LOCK function selection,press key to select LOCK or OFF. 4) Press ENTER or "SET" key after setup. 5) If select LOCK,the "SV" will display "LOCK" when pressing "SET" key, which means the parameters have been setup and not accessible to any change. 4.9 The second level of Advanced Setting 1) Enter the first level of advanced setting and press “SET”...
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8. F-18 stands for the protection of maximum temperature. Its setting range is 140~250. (If drying temp. exceeds set value, machine halts and alarm sounds to avoid overheat caused by faults.) 9. F-19 stands for microswitch timeset of honeycomb rotor. “OFF” functions as shut-off and “ON”...
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Press RUN/STOP three times, hopper 1 turned off but hopper 2 turned on. Press RUN/STOP four times, both hopper 1 and 2 turned off. 4.12 Operation of Dehumidifying System Open up the control box, and find the temperature controller, adjust the scale to set the regeneration temperature: Picture 4-9:Temperature Controller Note:...
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Picture 4-11:Password Lock 2 4. Press "ENTER" key to confirm the input value and comes into next function item "F-05". 5. Because the first function key has two items,so jump into "F-04" after input "F-05", for exiting the function setting , press "SET" key. 4.13 Installation for Dewpoint Monitor 1) Use blade to cut off the film and outline the reserved hole site on the SCD control panel.
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Picture 4-13:Parts of Dew-point Monitor 3) Dismantle the copper joint of original machine and replace it with installation seat for dew-point monitor. Then dismantle straight form bushing from copper joint of original machine and install it on the installation seat, and connect copper pipe with straight form bushing.
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Picture 4-15:Installation Seat 4) Install dew-point transmitter assembly to copper joint. Picture 4-16:Installation for Transmitter 5) Connect signal wire. Particular shape of signal wire joint would avoid the wrong insert and connection. Picture 4-17:Connection of Signal Wire 6) Match dew-point monitor with holes on the panel and fix the installation. Picture 4-18:Installation for Dew-point Monitor 188(202)
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7) Connect signal wires of the transmitter and power lines of dew-point monitor with the according terminals. Connet contact No.1 and No.2 with power, supply is 220VAC. Contact No.3, No.4 and No.5 are idle. Connect contact No.6, No.7 and No.8 with the signal of transmitter. (C- Connects contact No.6, C+ connects contact No.7 and wire No.9 connects contact No.8.
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Trouble-shooting Symptom Possible causes Actions taken 1. Return air temperature too high 1. Check cooling water temperature (below 40℃) 2. Abnormal rotation speed 2. Adjust electric conveyer (Default value is 4) 3. Abnormal setting of regenerating 3. Launch temperature setup screen, set temperature regenerative temperature again 4.
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Symptom Possible causes Actions taken 1. Material is used up 1. To add more materials 2. Pipe is leakage 2. Repair or replace Continuous 3. Filter is blocked 3. Clean running but cannot fill 4. Check diaphragm valve or shutoff valve's 4.
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Picture 6-2:Operation Steps 6.2 Air Filters Please periodically clean the dust on the air filters, once per week. Cleaning steps: 1) Take out the air filter carefully. 2) Blow off the dust on the air filter screen and the cover with pressure air. 3) Wipe off the barrel wall of air filter with cloth.
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6.3 Blower Motors 1) To clean blower both internal and external parts (especially the fan cooling path), by removing surface dust. If more dusts are accumulated, it will cause deficiency for ventilation, temperature rising up, blower power reduced, vibration increased and so it will cause machine broke down. 2) Ball bearing, oil seal and sound-proof are belonging to consumable parts and so it has a life period and requires regular replacement.
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a. Saturate the rotor by blowing humid air (higher than 60%RH) through the rotor without having regeneration circuit on. This can be done by just turning the regeneration heater off and still have the process blower running if process air has high humidity. If the process air is too dry try to put a humidifier in the air stream.
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6.6 Clean of Y Type Strainer The cleaning work should be done according to the condition of cooling water dust. Clean it in time in such situations, such as hot air and insufficient cooling water flow. Note! Please note that some dirt, like oil mist or other types of sticky mist, is almost impossible to clean out effectively so the rotor may not be cleaned effectively and has to be replaced.
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6.7 Maintenance Schedule 6.7.1 General Machine Information Model Manufacture date Ф Voltage Frequency Power 6.7.2 Installation & Inspection Check if the air pipe are tightly connected. Check if the material clearance door tightly closed. Check if the air pipes are correctly connected. Check if there are damages of the honeycle.
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6.7.3 Daily Checking Check the switch of the machine. Check the switch of the machine. Check auto start-up of the machine. Check auto start-up of the machine. Check the switch of the machine. Check the switch of the machine. Check auto start-up of the machine. Check auto start-up of the machine.
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6.7.4 Weekly Checking Check the switch of the machine. Check auto start-up function. Check all the electric wires. Check loose electric connections. Check and clean air filter. Check and clean compressed air filter and regulator. Check magnetic valve. Check motor overload relay and phase-reversed prevention function. Check the switch of the machine.
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Check the switch of the machine. Check auto start-up function. Check all the electric wires. Check loose electric connections. Check and clean air filter. Check and clean compressed air filter and regulator. Check magnetic valve. Check motor overload relay and phase-reversed prevention function. Check the switch of the machine.
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6.7.5 Monthly Checking Check if the belt is loose or not. Check gear box working conditions. Check if there are leakages in the honeycomb. Check if the belt is loose or not. Check gear box working conditions. Check if there are leakages in the honeycomb. Check if the belt is loose or not.
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6.7.6 Half-yearly Checking Check if hot air pipe is broken or not. Check dehumidifier heater. Check regulation blower/material conveying blower/fans. Check if hot air pipe is broken or not. Check dehumidifier heater. Check regulation blower/material conveying blower/fans. Check if hot air pipe is broken or not. Check dehumidifier heater.
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