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Related Manuals for Contherm MITRE 4150
Summary of Contents for Contherm MITRE 4150
- Page 1 Scientific Ltd SERVICE MANUAL MITRE 4000 SERIES Sterilising - Standard/Tropicool/Cooled Models CELL CULTURE INCUBATORS CONTHERM SCIENTIFIC LIMITED P O BOX 30-605 LOWER HUTT 5040 TEL: (0064-4) 568 8034 FAX: (0064-4) 568 8095 EMAIL: contherm@xtra.co.nz...
- Page 3 The Purchaser is required to remit the purchase price of the unit to the supplier within the terms of that supplier's condition of sale. CONTHERM Scientific Company will accept no liability or shall its agents for consequent damage of any kind due to a malfunction or component failure.
- Page 4 STATEMENT of CONFORMITY This CONTHERM cabinet conforms to the following standards: • Electrical Safety: Designed to NZS6200 / AS3100:1994 • EMC: Complies with AS/NZS 2064: 1997 MANUALP/4000_SERVICE_0712 July2012...
- Page 5 CONTENTS SECTION 1 Definition of Terms SECTION 2 Introduction and Specifications SECTION 3 Installation SECTION 4 Operating Instructions SECTION 5 Calibration SECTION 6 Theory of Operation SECTION 7 Customer Troubleshooting and Maintenance SECTION 8 Spare Parts Lists SECTION 9 Fault / Alarm Codes SECTION 10 Servicing / Replacing Parts IMPORTANT...
- Page 6 SECTION 1 DEFINITION OF TERMS For the purpose of our standard specifications the following definitions shall apply: WORKING SPACE That portion of the internal space which is above the lowest shelf and not less than 5cm from any wall (including roof). CHAMBER TEMPERATURE That temperature at the centre of the working space.
- Page 7 SECTION 2 INTRODUCTION AND SPECIFICATIONS The CONTHERM CAT4000 Mitre Series of Co2 Culture Incubators has been expressly designed to give the widest choice of operating conditions consistent with high reliability and low cost, the addition of microprocessor control gives additional versatility and resolution while improving the degree of temperature control.
- Page 8 The lowest temperature performance is only achievable in a maximum ambient of +20 If fitted with a HEPA filter, the spatial specification is downgraded by a further ± 0.4 Relative Humidity - With the standard tray of water inside a standard cabinet the humidity will typically rise to 80% RH or more at a temperature of 37.0 maximum achievable humidity will be less in a Tropicool or Cooled cabinet.
- Page 9 SECTION 3 INSTALLATION The CAT 4000 Mitre Series Incubators are designed to be installed into a suitable well ventilated room with a preferred minimum clear space of at least 150mm on all sides to allow access for servicing. Mount the enclosure in its final place ensuring that adequate space is allowed for the door to open.
- Page 10 WARNING: To prevent FIRE or SHOCK hazard, DO NOT expose this product to rain or any type of moisture. FOR YOUR SAFETY To ensure safe operation the three-pin plug supplied must be inserted ONLY into a standard three-pin power outlet which is effectively earthed through the normal building wiring.
- Page 11 SECTION 4 OPERATING INSTRUCTIONS This appliance is NOT intended for use by young children or infirm persons without supervision. To set up unit for operation after unpacking and checking for damage proceed as follows: Follow any installation procedures (See SECTION 3). OPERATING CONTROLLER: This example will demonstrate how to set the cabinet for the following conditions:...
- Page 12 CALIBRATION Chapter. TROPICOOL UNITS: This type of cabinet is fitted with Contherm’s ‘Tropicool’ peltier cooling option. The Tropicool unit uses a peltier cooling device to obtain lower temperatures, typically allowing operation to 5 C below ambient.
- Page 13 ALARMS There are TWO types of alarm used in the Contherm Mitre series enclosures. Standard Alarms and Special Alarms STANDARD ALARMS [1-.-] [2-.-] [4-.-] [5-.-] [6-.-] [7-.-] [8-.-] [11.-] [12.-] These alarm numbers indicate a problem with cabinet control, ie. over- temperature, faulty sensor ,etc.
- Page 14 POWER CONTROL AND HI-LIMIT PANEL (RIGHT HAND SIDE) The Power Control and Hi-Limit Panel is fitted at the top right hand side of the enclosure. This panel contains the ON/OFF Switch, FUSE and user adjustable Temperature HI-LIMIT thermostat. SAMPLE PORT This fitting allows the user to SAMPLE the atmosphere inside the cabinet.
- Page 15 OPERATING CONTROL PANEL The Control Panel on the outer door is used to access the operating conditions for the enclosure. UP/TEMP This button is used to increase the parameter value, to display the enclosure Temperature and the Temperature set point. This will sometimes be referred to as the TEMP or the UP button.
- Page 16 HEAT Indicates when power is being supplied to the heating element. This will remain steady when large changes in conditions are occurring eg warming up or if the door has been opened. When the enclosure is at the temperature set point, the LED will pulse.
- Page 17 This means that when the enclosure arrives at the customer site, the calibration carried out in the factory may no longer be valid. Contherm wishes to make it clear that calibration is a CUSTOMER responsibility. Contherm has ensured that a complete acceptable calibration procedure is available for the customer to follow.
- Page 18 Release all buttons. After about 3 seconds the temperature display will show [---] then a HEXIDECIMAL number for about 2 seconds (This number may be noted as a reference to the current calibration) then another [---] and beep. The enclosure will now begin to adjust itself so that the reference thermometer temperature matches the SET POINT temperature.
- Page 19 CO concentration by independent means and if necessary REPEAT the AUTO-CAL procedure until satisfactory calibration is achieved. CONTHERM recommends a FYRITE is used to check the CO concentration. Any other means that is satisfactory to the customer may be substituted.
- Page 20 • AUTO-CAL is best done last thing at night as the calibration usually takes from 1 to 4 hours to complete. • CONTHERM recommends that AUTO-CAL is carried out at least every two months OR if a Temperature Calibration has taken place.
- Page 21 FACTORY IR CO CALIBRATION (For use only if correct result cannot be obtained from USER Calibration) These adjustments are normally carried out by a qualified service person and require a DC Voltmeter. There are two modes of calibration for the infra-red CO system.
- Page 22 about 16.5% CO ). This value may be raised or lowered to achieve the exact CO calibration result. (‘Normal’ range is from 0.550 – 0.750). If the cabinet display is reading too high when the CO concentration is compared with a test instrument (‘Fyrite’ etc) then the reference voltage should be adjusted slightly DOWN.
- Page 23 NB: These tests MUST be carried out with the cabinet EMPTY and at the specified ambient of +20 TEMPORAL PERFORMANCE: The cabinet should be set to operate at the Contherm specified calibration conditions. Temporal performance is tested by placing a suitable (calibrated) test probe in the centre of the workspace and recording the readings for up to 1 hour AFTER the cabinet has FULLY STABILISED.
- Page 24 The versatility of the enclosure is based on the Contherm ZP22 microprocessor control system. Multiplexed analog inputs that sense the Temperature, and CO are used to interface the sensor circuitry to the controller .
- Page 25 SECTION 7 TROUBLESHOOTING AND MAINTENANCE fault alarms are displayed on the TEMPERATURE LED display. The appropriate fault alarm can be identified in the Alarm Code list. NO DISPLAY WHEN MAINS SWITCH TURNED ON. - Cabinet not plugged in Plug in. - Input Fuse blown (5AMP) Replace.
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Page 26: Routine Maintenance
DISPLAY PRESENT- CONTROLLER WILL OPERATE CORRECTLY - Data corrupted Switch off for ten seconds Check points calibration - Component failure Call Service DISPLAY ON BUT SHOWING RUBBISH! The only power supplied to the display PCB is from the 5 volt supply on the controller board. - Page 27 REFRIGERATION SYSTEM (COOLED CO units ONLY) The refrigeration compressor is of the low starting torque type and may not start immediately if the power supply is disconnected. After approximately 3-5 minutes the internal refrigeration pressures will have equalised and the compressor will start up as normal.
- Page 28 REFRIGERATION SCHEMATIC DIAGRAM REFRIGERATION UNIT DATA (Cooled Units ONLY): Model: 4150C 4200C 4400C Compressor: Electrolux GL45AA Electrolux GL45AA Electrolux GL45AA Compressor:* L’Unite THB1340Y L’Unite THB1340Y L’Unite THB1340Y Condensor: S12/21 S12/21 S20/21 Cooling Coil: G6/15 G6/21 G10/21 Evap Valve: Danfoss KVP12 Danfoss KVP12 Danfoss KVP12 Refrigerant:...
- Page 29 SECTION 8 PARTS LISTS 4150 4200 4400 Shelf - Stainless Steel M1156 M1056 M1056 Shelf Guides (State Model) M1164 Glass Door (State Model) M1166 M1165 M1165 Glass Door Hinge M1006 Glass Door Catch M1008 Motor Shaft Seal M1198 Knurled knob Main Cabinet Glass door seal (S520) M1193 M1193...
- Page 30 SECTION 9 FAULT/ALARM CODES These codes will be shown on the temperature display, the ALARM LED will come on and an intermittent beep will sound. [1-.-] Under/Over Temperature The enclosure is operating more than ±2°C from the set point. The alarm will stop when the temperature is back within ±2°C of the set point.
- Page 31 [8-.-] Moderate Electrical Noise on mains power supply Interference has affected the microprocessor. This should occur only rarely. If persistent, check mains for Electrical Noise. Cancelled by pressing TEMP button. [9-.-] Severe Electrical Noise on Mains As above for [8-.-] but more serious, check mains wiring and earthing.
- Page 32 SECTION 10 SERVICING / REPLACING PARTS The procedure outlined in this section should be followed only as a guideline in servicing the cabinet or replacing part(s) of the cabinet. Reference photos may vary between cabinets. List of Servicing Procedures: Replacing the Main Fuse Replacing the In Board Fuse &...
- Page 33 Servicing Procedure: Replacing the Main Fuse The instruction below demonstrates how to replace the cabinet’s main fuse. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed. Safety requirement: Ensure that the cabinet’s power cord is unplugged from the power source before attempting to remove and replace the main fuse.
- Page 34 Servicing Procedure: Replacing the In Board Fuse & Checking Heartbeat LED The instruction below demonstrates how to replace the fuse in the ZP22 interface controller board. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed. Symptom of a blown in board fuse: Display board blackout, motor and elements have no power.
- Page 35 NOTE: The heartbeat LED is PULSING about once per second. If no pulsing is observed while there is power applied to the control board, it is likely that there is a problem with the control board. Contact service personnel. The in board fuse is encased in a transparent plastic protective case. Gently remove this to access the fuse.
- Page 36 Servicing Procedure: Replacing the Motor Seal & Fan Motor The instruction below demonstrates how to replace the motor seal. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed. Safety requirement: Ensure that the cabinet’s power cord is unplugged from the power source before attempting to remove and replace the motor seal.
- Page 37 Completely remove cabinet lid by turning the 2 black plastic fastener anti-clockwise until it pops up & unplug the earth wire connected to the lid. WARNING: Ensure the cabinet is Plastic fastener at unplugged from the main supply! both end of the lid Disconnect the motor leads from Motor leads motor...
- Page 38 BEFORE applying power to cabinet, carry out Insulation Test (use 500V insulation tester) and Earth Continuity Test check (as per AS/NZS 3760: In-Service Safety Inspection and Testing of Electrical Equipment). The basic safety checks and tests on electrical appliances required by AS/NZS 3760 are: 4.
- Page 39 Servicing Procedure: Replacing the Infrared CO Sensor The instruction below demonstrates how to replace the Infrared CO sensor. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed. Safety requirement: Ensure that the cabinet’s power cord is unplugged from the power source before attempting to remove and replace the Infrared CO sensor.
- Page 40 On the sensor port, unplug the IR CO sensor connector. Carefully remove the rubber bung. With the rubber bung removed, carefully pull out the CO2 sample port hose. Unscrew the T/Stat mounting and completely remove the sensor wires from the ZP22 Interface Board (free this wire from any mounting or cable ties).
- Page 41 Open the cabinet chamber & glass door. Remove the element cover to expose the element, scroll and sensors. Chamber Door Glass Door Element Cover Remove the 2 wingnut to access the complete sensor assembly. Ensure that the sensor assembly is well supported and that all sensor wires and mounting on top are removed.
- Page 42 Remove the IR CO driver board. Please take note of the power and output terminal wire connections and the jumper switches conditions. The board is mounted on 4 PCB standoff. Remove the CO sensing unit from the sensor mounting plate. 4 mounting screw holds the sensor in place.
- Page 43 The refitting of the IR CO sensor assembly should be done in the reverse order as above. Please take careful note of the following items: h. Correct washers, gasket and screws are used to mount the sensor. i. Sensor probe wire must be returned to the correct socket hole. j.
- Page 44 Servicing Procedure: Servicing the CO Solenoid The instruction below demonstrates how to service the CO solenoid. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed. Routine scheduled maintenance. Safety requirement: 1. Ensure that the cabinet’s power cord is unplugged from the power source before attempting to remove and service or replace the solenoid.
- Page 45 Typical solenoid layout. Note that some cabinet model that has 2 CO solenoids would have similar mounting and parts. Wiring location on the connecting block should be carefully noted. MANUALP/4000_SERVICE_0712 July2012...
- Page 46 Use appropriate and correct tools in servicing the solenoid. Disassemble the solenoid reference to the exploded view below. a. Remove the clip (A) to slide out the solenoid coil (B). b. Unscrew the nut (C) from the base (F) to remove plunger assemblies D &...
- Page 47 Refitting of the solenoid should be done in the reverse order as the above. Please take note of the following: a. Correct solenoid wiring connection must be observed. b. Secure any loose wires with cable tie. c. Check for loose wires that may have been missed, particularly the Earth wires.
- Page 48 Servicing Procedure: Replacing the Inner Door Seal The instruction below demonstrates how to remove the inner door seal from the cabinet. Suitably qualified service personnel should only carry out this procedure. Schedule of servicing: As and when needed. Safety requirement: 1.
- Page 49 Pull one end of the inner door Pull one end of the seal to remove from the cabinet inner Door Seal body. End to remove Arrow points to the cavity of the inner door seal that locks on to cabinet border.
- Page 50 Servicing Procedure: Earth Wire Revision for Display Ghost Issue on ZP22 Display The instruction below demonstrates how to resolve the display ghosting issue on ZP22 display board. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed.
- Page 51 Below is the typical ZP22 Interface Controller Board layout showing the locations of the different ports – sensor, output, display and main power input. On the display port, locate the wires connected on the “GND” position. The 2 earth wires connected are cable shield and green wire part of the 8-wire core cable.
- Page 52 On the main cabinet door, unscrew the 2 mounting screws to remove the display panel cover. Locate the “GND” wires on the display board. 3 earth wires are connected on this terminal. Wire 1: Cable earth shield with green sleeve. Wire 2: Green wire part of the 8-wire core cable.
- Page 53 ZP22 Interface Board Display Board Run1 Wire1 disconnected No wire disconnected Run2 No wire disconnected Wire1 disconnected Run3 Wire1 disconnected Wire1 disconnected Run4 No wire disconnected Wire3 disconnected Run5 Wire1 disconnected Wire3 disconnected NOTE: Please ensure that the disconnected wires are properly insulated.
- Page 54 Servicing Procedure: Calibration for INFRA-RED (IR) CO SENSOR with Front Panel Adjustment The instruction below demonstrates how to perform the calibration of CO that the cabinet displayed CO value reads the same as an external CO meter. Suitably qualified electrical personnel should only carry out this procedure.
- Page 55 USER CALIBRATION PROCEDURE: This calibration procedure adjusts the GAIN factor of the CO concentration. a. Connect the external CO meter on the sampling port and take note of the external meter reading. Compare this with the cabinet display adjust gain appropriate.
- Page 56 Repeat step 1 until the external CO meter and the cabinet display is reading about the same value. Record the final calibration factor for reference. FACTORY CALIBRATION PROCEDURE: Ensure the safety requirements are in place. Completely remove cabinet lid by turning the 2 black plastic fastener anti-clockwise...
- Page 57 Below is the typical ZP22 Interface Controller Board layout with the jumper pin setup for configuring the IR CO sensor and the CO tank auto-change over option. Below is the typical IR CO sensor driver board. The jumper pins and push button used during calibration is shown below.
- Page 58 Prepare the below items needed during CO calibration: a. Connect the CO supply tank to the cabinet. b. Connect a calibrated external CO meter to the sampling port (located at the right hand side of the cabinet). c. Prepare the digital voltmeter. This will be used to measure the IR constant value for reference.
- Page 59 Perform the IR CO sensor driver board Zero Offset Calibration. To adjust the ZERO of the CO display, it is necessary to proceed as follows: a. Connect a voltmeter to the IR sensor board output terminals. This is the terminal with wire going to the ZP22 interface controller board.
- Page 60 b. If the cabinet display is reading too high CO concentration compared with the external CO meter, then the IR constant should be adjusted slightly DOWN. Conversely, if the cabinet display is reading too low CO concentration compared with the external CO meter, then the IR constant should be adjusted slightly UP.
- Page 61 Remove the shorting jumper pins on JP4 and JP5. g. Allow sometime for the cabinet and the external CO meter to stabilise and adjust to the changes done. h. Repeat step 2.7 until the external CO meter and the cabinet display have about the same value.
- Page 62 Servicing Procedure: Replacing the Door Gasket The instruction below demonstrates how to replace the door gasket. Suitably qualified personnel should only carry out this procedure. Schedule of servicing: As and when needed. Safety requirement: 1. Ensure that the cabinet’s power cord is unplugged from the power source before attempting to remove and replace the door gasket.
- Page 63 Re-mount the door back with the new gasket to the door front assembly. For common reference, below is a cutout photo of how the gasket is held between the door front and back assembly. The pop rivets will hold the gasket through the door front and back assembly. Magnet Door Gasket Door Back...
- Page 64 Servicing Procedure: Replacing the ZP22INT PCB The instruction below demonstrates how to replace the main controller board ZP22INT. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed. Safety requirement: Ensure that the cabinet’s power cord is unplugged from the power source before attempting to remove and replace the main controller board ZP22INT.
- Page 65 Below is the typical ZP22 Interface Controller Board layout showing the locations of the different ports – sensor, output, display and main power input. Unplug all the wiring connections to the board. Take note of the locations and orientation of the connections. Remove the board from the PCB stand off.
- Page 66 Servicing Procedure: Replacing the ZP22DSP Display PCB The instruction below demonstrates how to replace the ZP22DSP display board. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed. Safety requirement: Ensure that the cabinet’s power cord is unplugged from the power source before attempting to remove and replace the ZP22DSP display board.
- Page 67 Remove the wiring connections and unsolder the door sensor wires. Remove the mounting nuts and washers. Carefully pull the display board out of the panel. Important note: 1. Take note of the wiring orientations. 2. Take note which mounting uses nylon washers. Refitting of the board should be done in the reverse order as the above.
- Page 68 Servicing Procedure: Replacing the Heated Glass Door The instruction below demonstrates how to replace the heated glass. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed. Safety requirement: Ensure that the cabinet’s power cord is unplugged from the power source before attempting to remove and replace the glass door.
- Page 69 The heated glass door is held by a bolt and nut combination. To remove it from the hinge, remove this mounting screw. Carefully hold the glass door in place, as it will fall off the moment the mounting screws are removed. It is recommended to have 2 personnel to do this procedure.
- Page 70 BEFORE applying power to cabinet, carry out Insulation Test (use 500V insulation tester) and Earth Continuity Test check (as per AS/NZS 3760: In-Service Safety Inspection and Testing of Electrical Equipment). The basic safety checks and tests on electrical appliances required by AS/NZS 3760 are: 1.
- Page 71 Servicing Procedure: Replacing the Temperature Sensor The instruction below demonstrates how to replace the temperature sensor. Suitably qualified electrical personnel should only carry out this procedure. Schedule of servicing: As and when needed. Safety requirement: Ensure that the cabinet’s power cord is unplugged from the power source before attempting to remove and replace the temperature sensor.
- Page 72 On the sensor port, unplug the IR CO sensor connector. Carefully remove the rubber bung. With the rubber bung removed, carefully pull out the CO2 sample port hose. Unscrew the T/Stat mounting and completely remove the sensor wires from the ZP22 Interface Board (free this wire from any mounting or cable ties).
- Page 73 Open the cabinet chamber & glass door. Remove the element cover to expose the element, scroll and sensors. Chamber Door Glass Door Element Cover Remove the 2 wing nut to access the complete sensor assembly. Ensure that the sensor assembly is well supported and that all sensor wires and mounting on top are removed.
- Page 74 Unsolder the temperature sensor from the Presen Board and replace with a new one. The refitting of the sensor assembly should be done in the reverse order as above. Please take careful note of the following items: a. Correct washers, gasket and screws are used to mount the sensor. b.
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