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Summary of Contents for Colortronic CTT 250
- Page 1 Operating Instructions Dehumidified air dryer CTT 250 with Siemens S7 control unit Colortronic GmbH...
- Page 2 CTT 250 Colortronic GmbH Otto-Hahn-Straße 10-14 Colortronic North America Inc. 61381 Friedrichsdorf 155 E. 9th Avenue Runnemede, NJ 08078 Telephone (0 61 75) 7 92-0 Telephone (856) 312-9600 Telefax (0 61 75) 7 92-1 79 Telefax (856) 312-9696 Email info@colortronic.de Email ctusa@colortronic.com...
- Page 3 CTT 250 Colortronic GmbH retains all rights to change the information in these operating instructions at any time without notice. We assume no liability for any errors or direct or indirect damage resulting in con- text with these operating instructions.
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Page 4: Table Of Contents
CTT 250 Table of contents 1. General Information ............1-1 1.1. - Page 5 CTT 250 5. Maintenance ............. 5-1 5.1.
- Page 6 CTT 250 10. Spare parts list ............10-1 10.1.
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Page 7: General Information
CTT 250 1. General Information » These operating instructions are addressed to all users of the device. These operating instructions must be used by every person charged with work on the unit. General Information 1-1... -
Page 8: Warnings And Symbols
CTT 250 1.1. Warnings and symbols The following warnings and symbols are used in these operating instructions: » This symbol indicates danger to life! Fatal or serious injury is possible if the corresponding instructions, regulations or warnings are not observed. - Page 9 CTT 250 When disposing of drying agents / batteries / oil, observe all official rules. Caution: High noise pollution! For all work on the equipment, hearing protection should be worn. Avoids impairment of hearing! Caution: Danger of crushing! Disconnect the equipment from mains supply before starting mainenan- ce procedures.
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Page 10: Explanations And Information
CTT 250 1.2. Explanations and information Various terms and designations are used in these operating instructions to ensure clarity. There- fore please note that the terms used in the text stand for the corresponding explanations listed be- low. • Equipment ”Equipment”... -
Page 11: Safety Instructions
CTT 250 2. Safety instructions » These safety instructions apply to all persons within the range of action of the equipment. Please inform all persons within the range of action of the equipment of the direct and indirect hazards connected with the equipment. -
Page 12: For Your Safety
CTT 250 2.1. For your safety General The operating personnel of this equipment must be at least 16 years old. Please read these operating instructions carefully before taking into operation for the first time. Contact us should questions arise. This avoids injury and damage to equipment! These operating instructions must be kept available at all times at the place of operation of the equipment. - Page 13 Do not modify, add other equipment or change the design of the equipment without the approval of the manufacturer. Caution: Danger of accidents! Attachments not supplied by Colortronic must be manufactured in accordance with safety regula- tion EN 294. Danger of accidents! The equipment may only be operated when all the associated components are properly connec- ted up and in accordance with the relevant regulations.
- Page 14 CTT 250 When drying plastics which emit gases dangerous for human health, take care that the regenera- tion exhaust air is disposed of without polluting the environment. This will prevent danger to peo- ple and material! Operate the dryer only if there is at least one drying hopper operating. This will prevent damage of...
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Page 15: For The Safety Of The Devices
When you dispose of drying agents, observe all official rules. Note that drying cells are replaced or refilled by Colortronic only if they are empty. The material level may not fall below 40 % in the drying hopper, when material is continuously re- moved from the drying hopper, but no material is continuously fed into the drying hopper (batch drying). -
Page 16: Start-Up
CTT 250 3. Start-up » This chapter is directed at the operators of the equipment. This chapter assumes general skills in dealing with drying systems and SPS (PLC) control units. This chapter assumes that the functional description has been read and un- derstood. -
Page 17: Control System
CTT 250 3.1. Control system The control system is switched on at the main switch. The control system is operated via a ”selection window” and the keyboard of the operator panel. The facility’s control system is factory-programmed. Nevertheless, you have to set specific values (basic parameters) which are dependent on the processed material, for instance. -
Page 18: Flow Chart
CTT 250 3.1.2. Flow chart Indicator lamp Valve system Drying chamber Drying blower Return air filter Drying hopper Drying heater Regeneration heater Regeneration blower Regeneration air filter Indicator lamp messages: Green continous light: in process Red continous light: alarm Start-up 3-3... -
Page 19: Switching On The Dryer
CTT 250 3.2. Switching on the dryer Switch on the system by means of the main switch. & The control system carries through a self-test; after that, the name of the dryer and the operation status of the unit are displayed. -
Page 20: Viewing The Software-Version
CTT 250 3.3. Viewing the software-version “±” Press the -key. & The software-version will be displayed. 3.4. Passwords The entry of a password prevents unauthorised persons from having access to the data entered into the control system. Important data can then be entered or modified only after the password has been entered. - Page 21 CTT 250 Login Press the key “F2". Enter the password. Press the ENTER key. & If the password has been entered correctly, the corresponding password level is displayed. You can now enter data into the control system or modify data which have already been entered.
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Page 22: Basic Parameters
CTT 250 3.5. Basic parameters Press the ”F1"-key. 3.5.1. Turning the devices on/off Select ”Main menu”. Acknowledge with the ENTER-key. Press the ”F2”-key. Dryer on/off ”on” = turn dryer on, ”off” = turn dryer off. Acknowledge with the ENTER-key. Timer on/off Press the SHIFT-key and choose with the arrow-keys the desired operation: ”internal”... - Page 23 CTT 250 Hopper # on/off #: Select the drying hopper that you wish to enable or disable. Press the ENTER key. “on”/ “off”: Press the SHIFT key. Using the arrow-keys enter “ON” if you want to enable the dry- ing hopper. Enter “OFF” if you want to disable the drying hopper. Press the ENTER key.
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Page 24: Entering Dryer Values
CTT 250 3.5.2. Entering dryer values Select ”Dryer”. Acknowledge with the ENTER-key. Press the ”F3”-key. Regeneration Heater Act. The regenerated heat temperature will be displayed. Used air Act. The current temperature of the used air will be displayed. Press the “â” key. - Page 25 CTT 250 & If the unit operates with a return resp. pre air cooler (optional): Return / Pre air cooler Target Enter the max. permissible air temperature. Acknowledge with the ENTER-key. Return / Pre air cooler Act. The current air temperature will be displayed.
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Page 26: Entering Hopper Values
CTT 250 3.5.3. Entering hopper values Select ”Hopper”. Acknowledge with the ENTER-key. Press the ”F4”-key. Hopper entry # Enter the drying hopper number whoose value you want to view or modify. Acknowledge with the ENTER-key. Hopper entry Target Enter the drying temperature for the drying hopper (when operating with supplementary heating). - Page 27 CTT 250 & If the unit operates with motor flaps (optional): Granules # Enter the drying hopper number whoose value you want to view or modify. Acknowledge with the ENTER-key. Granules target: _ % = _ °C (°F) Enter the material temperature at which the flap (optional) on the drying hopper should close.
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Page 28: Entering Drying Hopper Names
CTT 250 3.5.3.1. Entering drying hopper names & This function is password protected. Press the SHIFT-key and the ”F3”-key. Enter the password if requested. Hopper # Enter the drying hopper number. Acknowledge with the ENTER-key. Name TT: ######## Enter the drying hopper name. Acknowledge with the ENTER-key. -
Page 29: Entering Dwelling Time
CTT 250 3.5.3.2. Entering dwelling time & This function is password protected. Press the SHIFT-key and the ”F3”-key. Enter the password if requested. Hopper # Enter the drying hopper number. Acknowledge with the ENTER-key. Dwelling time: _ min Enter the dwelling time of the material within the drying hopper in minutes. Acknowledge with the ENTER-key. -
Page 30: Observing Processing Status
CTT 250 3.5.4. Observing processing status Select ”Status”. Acknowledge with the ENTER-key. Press the ”K1”-key. & The current operation status of individual assembly parts is displayed: e.g.: valve block moved in/moved out/error “moved in” = The upper drying cells are within the drying circuit; the lower ones are regenerated. -
Page 31: Setting Date And Time
CTT 250 3.5.5. Setting date and time & This function is password protected. Press the “K3"-key. Enter the password if requested. Date Press the SHIFT key. By means of the arrow keys, select the desired week-day. By means of the arrow keys, select the shown date. -
Page 32: Viewing/Changing Language And Contrast
CTT 250 3.5.6. Viewing/changing language and contrast & This function is password protected. Press the “K4"-key. Enter the password if requested. Contrast Press the SHIFT key. By means of the arrow keys, select the adjustment which suits you best. Press the ENTER key. -
Page 33: Changing Parameters
Press the SHIFT-key and the ”K1”-key. Run on time drying blower -- 300 sec. Standard setting: 300 seconds, changes only after contacting Colortronic Service. Press the “â” key. Parameters The values in this menu may only be changed after contacting Colortronic Service. -
Page 34: Setting The Timer
CTT 250 3.5.8. Setting the timer Select ”Timer”. Acknowledge with the ENTER-key. Press the SHIFT-key and the ”F1”-key. XX ON 00:00 OFF 00:00 (XX = day Mo-Su) Enter for each day the switching on time and the switching off time. -
Page 35: Starting Continuous Operation
CTT 250 3.6. Starting continuous operation When you have carried through all basic settings, you can start with continuous operation. Make sure that hoppers which are not in use are separated from the de- humidified air supply. Make sure that the set drying temperatures are suited for the materials in the hoppers. -
Page 36: Viewing System Runtime
CTT 250 3.7. Viewing system runtime Select ”System runtime”. Acknowledge with the ENTER-key. Press the SHIFT-key and the ”F2”-key. System runtime #.## h r.-blwr. #.## h m.-blwr. #.## h & The runtime of the blowers and the PLC (SPS) is shown in hours. -
Page 37: Switching The Dryer Off
CTT 250 3.8. Switching the dryer off Select ”Main menu”. Acknowledge with the ENTER-key. Press the ”F2”-key. Select ”Dryer off”. Acknowledge with the ENTER-key. Wait until the regeneration phase is finished and the blower has come to a standstill. Switch off the dryer at the main switch. -
Page 38: Error And Error Correction
CTT 250 4. Error and error correction » This chapter is directed at the operators of the equipment. This chapter assumes general skills in dealing with drying systems and SPS (PLC) control units. This chapter assumes that the “start-up” description has been read and un- derstood. - Page 39 CTT 250 & Alarm messages are displayed in plain language on the screen of the operator device. The display of alarm messages in the operator device can only be erased by pressing the ”ACK” key. The failure is not repaired.
- Page 40 CTT 250 View Press the ”F2"-key. All alarm messages with their numbers (see Texts), date, time and the supplement ”K”, ”G”, or ”Q” are displayed. & ”K” = coming (a failure occured) Pressing the “à”-key displays the alarm message in plain text.
- Page 41 The number of current alarm messages is displayed. Press the ESC-key. Delete Press the ”F3"-key. & This function is password protected (Colortronic service). Press the ENTER-key for deleting the messages. Press the ESC-key. Press the “â”-key. Error and error correction 4-4...
- Page 42 & If there are more current alarm messages than can be saved, a warning message (= residual buffer reached) may be given. This function is password protected (Colortronic service). Overflow warning On/Off Press the SHIFT-key. By means of the arrow keys, select ”on” if a warning message is to be given.
- Page 43 CTT 250 Text Press the ”F3"-key. All possible alarm messages are displayed with their numbers (see Viewing). For viewing the possible alarm messages, press the arrow keys: PLC (= SPS) Battery is Empty Replace the SPS battery. Main Switch is Off The main switch has been placed in the off position.
- Page 44 CTT 250 Temperature Measurement Regeneration Heater Defective Check the cables and the sensor. Check the power supply. Short circuit check. Excess Temperature Regeneration Heater The regeneration temperature is too high. Check the safety temperature limiter. Colortronic Service. Insufficient Temperature Regeneration Heater The regeneration temperature is too low.
- Page 45 CTT 250 Temperature Measurement Drying Heater Defective Check cables and sensor. Check the power supply. Short circuit check. Excess Temperature Drying Heater The drying temperature is too high. Check the safety temperature limiter. Colortronic Service. Insufficient Temperature Drying Heater The drying temperature is too low.
- Page 46 CTT 250 Temperature Measurement Granules Defective Hopper X (X = number of the drying hopper) Check cables and sensor. Check the power supply. Short circuit check. Excess Temperature Granules Hopper X (X = number of the drying hopper) The material temperature is too high.
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Page 47: Maintenance
Never operate the equipment when partially dismantled. Any maintenance and repair work NOT described here may only be carried out by Colortronic service personnel or by specialised staff authorised by Co- lortronic. Disconnect the equipment from mains supply before starting mainenan- ce procedures to ensure that it cannot be switched on unintentionally. - Page 48 Ensure that materials and incidentals required for operation as well as spare parts are disposed of properly and in an environmentally sound manner. Use only original Colortronic spare parts. Keep record of all maintenance and repair procedures. Maintenance 5-2...
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Page 49: Maintenance Schedule
CTT 250 5.1. Maintenance schedule Daily: Check warning signs on equipment for good legibility and completeness Clean return air filters and casing (depending on dust build-up) Weekly: Check main switch for proper function Check the signal lamps for proper functioning... -
Page 50: Cleaning Or Replacing The Air Filters
CTT 250 5.2. Cleaning or Replacing the Air Filters Press the ”F2”-key. Select ”Dryer off”. Acknowledge with the ENTER-key. Wait until the blower has stopped. The run on time of the blower is 15 minutes. Switch off the main switch of the dryer. -
Page 51: Cleaning Or Replacing The Return Air Filter
CTT 250 5.2.1. Cleaning or Replacing the Return Air Filter Open the panel (A) by means of the provi- ded switch cabinet key. Detach the nut on the housing of the re- turn air filter (B) and remove the housing cover. -
Page 52: Cleaning Or Replacing The Regeneration Air Filter
CTT 250 5.2.2. Cleaning or Replacing the Regeneration air filter Open the back panel. Slide the air filter (A) off the nozzle. Blow compressed air through the clogged air filter from the inside out or replace the air filter. Install the cleaned/new air filter (A). -
Page 53: Disposing Of Drying Agents
CTT 250 5.3. Disposing of Drying Agents Please note that drying cells are replaced or refilled by Colortronic only if they are empty. When disposing of drying agents, observe all official rules. Since used drying agents may contain impurities from the dried materi- als, treat them as special waste. -
Page 54: Cleaning The Drying Hopper
CTT 250 5.4. Cleaning the Drying Hopper Press the ”F2”-key. Select ”Dryer off”. Acknowledge with the ENTER-key. Wait until the blower has stopped. The run on time of the blower is 15 minutes. Switch off the main switch of the dryer. - Page 55 CTT 250 TT 25 Open the toggle-type fasteners (A) at the hopper lid and fold the hopper lid upwards (if in use: remove be- fore the single conveyor). Clean the drying hopper. Close the hopper lid and close the toggle-type faste- ners (A) (if in use: re-mount the single conveyor).
- Page 56 CTT 250 TT 60 - 1600 Open the cleaning opening of the drying hopper: Lift and turn the handle (A) to open the lock, if in use: remove before the single conveyor (TT 400 - TT 1600: 2 handles). Clean the drying hopper.
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Page 57: Changing The Battery Of The Control System
CTT 250 5.5. Changing the battery of the control system » This work may be carried through only by qualified personnel trained in the field of electrical engineering. The battery may be changed only with the control system switched on. - Page 58 CTT 250 Store backup batteries in a dry and cool place. Backup batteries can be stored for approx. 5 years. If backup batteries are not treated properly, they can ignite, explode and cause severe burning. & Order number battery: ID 83809 Batteries must be disposed of in keeping with the relevant national envi- ronment protection regulations/guidelines.
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Page 59: Resetting The Control Values
CTT 250 5.5.1. Resetting the control values » This electrical work is intended to be carried out only by trained personnel. & After changing the battery or the PLC the control values should be reset- ted. All control values are set back to the standard settings. -
Page 60: Functional Description
CTT 250 6. Functional description » This functional description is addressed to the operators of the equipment. This functional description assumes general familiarity with drying equip- ment. It should be verified that the operators do indeed have the appropriate skills. -
Page 61: General Information
CTT 250 6.1. General Information The dehumidified air dryers were developed for drying plastic granules. Due to their compact con- struction, they can be employed next to the processing machine (drying hopper on the processing machine) or with one or more drying hoppers as a movable facility (compact facility). -
Page 62: Drying Hopper (Optional)
CTT 250 6.2. Drying Hopper (Optional) The material is dried in the drying hopper. The dehumidified air is conducted through the material in the drying hopper and takes up moisture. Drying hoppers must have the appropriate dimensions for their specific use so that the desired final moisture content is reached. -
Page 63: Connection To A Pneumatic Conveying System (Optional)
Colortronic drying hoppers are equipped with a suitable flange for adding a Colortronic pneumatic conveyor. Suction boxes with one or three suction tu- bes can be supplied as well (optional). These suction boxes are developped specifically for this type of hopper. -
Page 64: Transport, Assembly And Storage
CTT 250 7. Transport, Assembly and Storage » This chapter is intended for all operating personnel of the equipment. Personnel using these instructions must be instructed in the regulations for the prevention of accidents, the operating conditions and safety regulations and their implementation. -
Page 65: Tansport And Packing
CTT 250 7.1. Tansport and Packing » Please ensure adequate carrying capacity of the lifting equipment. Note that the dryer system is top-heavy. Risc of toppling! The machine must not be tilted or laid on its side. The equipment pass a rigorous operating test in the factory and are packed carefully to avoid transport damage. - Page 66 CTT 250 with a workshop crane Check if the eyelets are installed on the dryer housing. If this condition is met, fasten the transport cables to the eyelets. If this condition is not met, mount the eyelets and then fasten the transport cables to the eyelets.
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Page 67: Assembly
CTT 250 7.2. Assembly » Please ensure adequate carrying capacity of the lifting equipment. Check the carrying capacity of the point of installation, particularly if installed on a platform. The place selected for installation should be as free of vibrations as possible. -
Page 68: Assembly Instructions
CTT 250 8. Assembly instructions » These installation instructions are intended for persons with skills in electri- cal and mechanical areas due to their training, experience and received in- structions. Personnel using these installation instructions must be instructed in the reg- ulations for the prevention of accidents, the operating conditions and safety regulations and their implementation. -
Page 69: Installation Of The Exhauster Fan For Regeneration Of Exhaust Air
CTT 250 8.1. Installation of the exhauster fan for regeneration of exhaust air When plastics are being dried that release harmful gases during the drying process, care must be taken that the regeneration exhaust air is disposed of in an environmentally sound way. At the same time the throughput of the regeneration blower must not be altered. -
Page 70: Electrical Connection
The electrical connection may only be carried through or assigned by Color- tronic service staff or by qualified staff authorized by Colortronic. Other persons are not permitted to carry through the electrical connection. -
Page 71: Compressed Air Supply
CTT 250 8.4. Compressed Air Supply A compressed air supply is needed to operate the valve stem. Check whether the compressed air piping has been installed and connected properly. Check whether fittings, length and quality of the hose assemblies are in accordance with the requirements. -
Page 72: Technical Data
CTT 250 9. Technical Data Basic Version • 2 drying cells for constant dry air production • Time controlled change-over to the drying cell • Maintenance-free pneumatic air valves • Optimal regeneration time due to constant monitoring of the moisture level in the drying cells or desiccant beds •... - Page 73 CTT 250 Dimension Sheet 3152 Dimensions and data without obligation. Dimensions in mm. Specifications may be subject to alterations. Technical Data 9-2...
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Page 74: Spare Parts List
CTT 250 10. Spare parts list » This spare parts list is intended to be used only by trained personnel. Other persons are not permitted to modify or repair the equipment. & ID-numbers for units with special voltage, for ex. blowers, only on re- quest. - Page 75 CTT 250 Pos. ID-number Description 92241 Tension ring 94233 Sealing ring 95409 Hose clamp 96118 Flexible pipe 85651 Heating element 9 kW, 230/400 V 82354 Heating element 9 kW, 266/460 V 07340 Sealing Blower only on request Blower only on request...
- Page 76 CTT 250 Pos. ID-number Description S82966 Pneumatic thruster S38457 Push-piston valve stem S82962 Valve 85774 Maintenance unit S82965 Approach switch Spare parts list 10-3...
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Page 77: Switching Cabinet And Operating Unit
CTT 250 10.1. Switching Cabinet and Operating Unit & Observe spare parts list in the electrical manual. 10.2. Drying Hopper & Observe chapter accessories. Spare parts list 10-4... -
Page 78: Electrical Manual
CTT 250 11. Electrical manual » This electrical manual is intended to be used only by Colortronic service personnel and trained personnel authorized by Colortronic. Other persons are not permitted to modify or repair the equipment. Connection diagram no.: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Currently not available;... -
Page 79: O Spare Parts List Drying Hoppers Tt 25 - Tt 6400 O Entering Values On The Op
CTT 250 12. Accessories Spare parts list Drying Hoppers TT 25 - TT 6400 Entering values on the OP 7 / 17 Flap control with Fuzzy-Logic _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _... -
Page 80: Accessories
Accessories Spare parts list Drying Hoppers TT 25 - TT 6400 Colortronic GmbH... - Page 81 TT 25 - TT 6400 Colortronic GmbH Otto-Hahn-Straße 10-14 Colortronic North America Inc. 61381 Friedrichsdorf 155 E. 9th Avenue Runnemede, NJ 08078 Telephone (0 61 75) 7 92-0 Telephone (856) 312-9600 Telefax (0 61 75) 7 92-1 79 Telefax (856) 312-9696 Email info@colortronic.de...
- Page 82 TT 25 - TT 6400 Colortronic GmbH retains all rights to change the information in these operating instructions at any time without notice. We assume no liability for any errors or direct or indirect damage resulting in con- text with these operating instructions.
- Page 83 TT 25 - TT 6400 1 2 3 4 5 6, 7 PT 100 PT 100...
- Page 84 TT 25 - TT 6400 Pos. ID-number Description Radiator hopper heater 85343 1.5 kW 85338 3.0 kW 85363 6.0 kW 85651 9.0 kW 95828 18.0 kW, 27.0 kW, 36.0 kW, 63.0 kW 87094 27.0 kW, 48.0 kW, 63.0 kW 18232 Hand flap Ø...
- Page 85 TT 25 - TT 6400 Pos. ID-number Description 18232 Hand flap 92241 Tension ring 94233 Sealing ring 30306 16517 Bypass flap 92241 Tension ring 84144 Hose clamp 30309 Lid with hose 96118 Pipe 95409 Hose clampe 92241 Tension ring 94233 Sealing ring (optional, if flap in use) 30350 Grounding set...
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Page 86: Entering Values On The Op 7 / 17
Accessories Entering values on the OP 7 / 17 Colortronic GmbH... - Page 87 General Operation Entering Values General procedure In input fields, values can be entered on the OP and transferred to the PLC. To do this, proceed as follows: Step Procedure Branch initially to the screen you require and then to the corresponding screen entry. Using the arrow keys, select the input field you require within the screen entry.
- Page 88 General Operation 3.3.1 Entering Numerical Values Input using numer- In fields that allow the operator to enter a numerical value, you enter the nu- ical keypad merical value character by character using the keypad on the system key- board. Changing the If there is a value in the field already, it is cleared completely from the field value when the first character is entered.
- Page 89 General Operation 3.3.2 Entering Alphanumeric Values Mixed input of With the input of alphanumeric values, digits and letters are mixed. digits and letters For the numerical components of the input, proceed as described in section 3.3.1. If, however, you wish to enter a letter at the current cursor position, you must enable the corresponding alphanumeric font.
- Page 90 General Operation Extended charac- If the characters available on the keypad are not sufficient for the alphanu- ter set meric input, you can select additional letters and special characters from the extended character set. The extended character set is available for all KC type fields.
- Page 91 General Operation 3.3.3 Entering Symbolic Values Text instead of a When you enter a symbolic value, text is displayed instead of the value. If a value field has to be filled by entering symbolic values, take the value from a list of options.
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Page 92: Flap Control With Fuzzy-Logic
Accessories Flap control with Fuzzy-Logic Colortronic GmbH... - Page 93 Flap control with Fuzzy-Logic Observe that the hopper is not switched off after the flap has closed. Turning hopper off: see chapter “start-up, turning the devices on/off”. Control unit “flap” Switch position: 0 = “Quick closing” flap closes quick 1= “Slow closing” flap closes controlled 2= “Automatic control”...
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Questions and answers
Due point issue out of parameter what's the cause
The dew point issue on the Colortronic CTT 250 can be caused by problems with the drying or regeneration systems. Specifically, it may result from:
- Insufficient temperature in the regeneration heater (check the regeneration heater).
- Defective temperature measurement in the regeneration heater (check cables, sensor, power supply, and for short circuits).
- Vacuum issues in the regeneration or drying blower (check the blowers and vacuum sensors).
- Safety switches or temperature limiters being triggered (check safety temperature limiters and reset if needed).
These issues can prevent proper moisture removal, leading to an out-of-parameter dew point.
This answer is automatically generated