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Effective models This service manual is effective following models. Model name Product code Voltage and Frequency MDF-C8V1 823 012 51 115V 60Hz 823 012 52 220V 50Hz 823 012 53 220V 60Hz 823 012 54 220/230/240V 50Hz 823 012 55...
Contents P a g e S p e c i f i c a t i o n s - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - S t r u c t u r a l s p e c i f i c a t i o n s - C o n t r o l s p e c i f i c a t i o n s - P e r f o r m a n c e s p e c i f i c a t i o n s...
Specifications Structural specifications Item Specifications External dimensions W 550 × D 685 (+83)* × H 945 mm Internal dimensions W 405 × D 490 × H 425 (mm) Effective capacity 84 L Exterior Painted steel Interior Painted steel Door Painted steel Insulation Cabinet;...
Control specifications Item Specifications Cooling performance (1/2H temp, AT 30 , no load) Temperature control range -60 ~-80 (AT5~30 , no load) Temperature controller Microprocessor controlled system: Key-pad input Temperature set range: -55 ~-85 increment) Set value kept in non-volatile memory Temperature sensor Pt.1000 Temperature display...
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Connections on PCB Following is the explanation of connections on Main PCB. Connector Connects to Usage Voltage Switching power supply To supply the power to PCB #1:12V To connect with interface MTR-480 Option Remote alarm terminal #1: COM. Output for remote alarm contact #2: N.O.
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Control specifications Key and Switch BUZZER In alarm condition, buzzer stops sounding with this key pressed. Remote alarm output and alarm message would not be off. During the power failure (battery back-up), press the key to show chamber temperature. ALARM TEST With this key pressed to activate alarm test mode to be forcibly step into alarm condition (ALARM lamp blinks, intermittent buzzer sounds, digital LED goes off and remote alarm inputs).
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Unacceptable If you try to input F51~F59 and press SET key, the buzzer sounds to setting: inform the value is unacceptable. Error codes E01: Temp. sensor is disconnected E02: Temp. sensor is short-circuited E05: Comp. sensor is disconnected E06: Comp. sensor is short-circuited E09: Battery switch is OFF E10: Compressor temperature abnormality E15: Fan motor malfunction...
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Low temp. alarm When chamber temperature is equal or lower than setting temperature + low temp. alarm setting temperature - 1, ALARM lamp and digits are blinking, intermittent buzzer sounds with about 15 minutes of delay, and remote alarm output turns on. When chamber temperature is equal or higher than setting temperature, ALARM lamp and digits go off, buzzer stops sounding, and remote alarm output turns off.
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Function modes Automatically revert to chamber temperature display High temp. alarm setting Low temp. alarm setting Battery lifespan check Automatically revert to chamber temperature display Compressor delay time setting Service code input (code: 384) F07 * Temp. sensor Zero Adjustment F08 * Automatically revert to chamber temperature display F09 *...
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Input F17 and press SET key to display “001”. Change the value with key and key. Press SET key to store and revert to chamber temperature display. Model code ‘003’: MDF-C8V1 <Initial values in non-volatile memory> Zero adjustment for temp. sensor Compressor forcibly OFF : 8 min.
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F21: <Function> Serial communication ID setting <Operation> Input F21 and press SET key to display “000” (initial). Change the value in the range “001”~”255” with key and key. F22: <Function> Serial communication mode setting <Operation> input F22 and press SET key to display “000” (initial value) Change the value with key and key.
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F30: <Function> ROM version is displayed <Operation> Service code should be input in F06 prior to use this mode. Input F30 and press SET key to display alternately F30 with “X.XX” (present ROM version). Press SET key to revert to chamber temperature display. F32: <Function>...
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Prevention for oil logging in capillary tube Compressor is forcibly stop operation to prevent oil from being logged in capillary tube. Interval : Once every 12 hrs. Period : 8 min. Timing : 1) About 9 sec. of delay after compressor stops operation during cycle after 12 hrs has passed since the unit had started operation.
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(2) Examples of display Chamber temp. -79.5 Decimal point of chamber temp. -80.0 Set temp. -80.0 Sensor offset -4.9 Operation monitoring Function Error Service code Set value Accumulation time 8H timer 135 Key Lock (3) Buzzer specifications: Key operation: A click emitted if available Unacceptable input: Alarming tone emitted for 1 second...
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Parts layout Temp. sensor PT-1000> MDF-C8V1 <Control panel> <Opposite side of control panel> Main PCB Switching power supply Control PCB Display PCB...
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<How to access the Main PCB> 1. Catch the pick by screwdriver and pull the panel out. 2. Loosen tie band to set cables free. Pull Electric BOX out carefully. Tie band Electric BOX...
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<Lower back side> <Remote alarm> Battery switch Compressor <Lower left side> <Lower right side> Electric Box Expansion tank Condensing Battery fan motor Starting relay Temp.control relay Starting capacitor Power cord Running capacitor Breaker switch...
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Test data Note) These data are the reference only. AT30 Pull-down & Pull-up Temperture 1/2H 115V60Hz 1/2H 220V50Hz 1/2H 220V60Hz 1/2H (Pull-up -100 Time[hour]...
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AT30 Pull-down Temperture 115V60Hz 1/2H 115V60Hz EVA IN 115V60 EVA OUT 115V60 -100 Time[hour] AT30 Pull-down Temperture 220V50Hz 1/2H 220V50Hz EVA IN 220V50Hz EVA OUT 220V50Hz -100 Time[hour]...
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AT35 Pull-down Current-Input 115V60H Input 115V60Hz Current 115V60Hz Time[hour] AT35 Pull-down Current-Input 230V50Hz 220V60Hz Input 230V50Hz Input 220V60Hz Current 230V50Hz Current 220V60Hz Time[hour]...
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MDF-C8V1 Temperature Uniformity - 15points measured (Reference Data)
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Conditions Note:This data does not represent a guarantee of product performance. Ambient temperature: 20/30 Load: Unloaded Distribution data Temperature of the cycle in each area (SV=-80 air temperature) Unit: Ambient temperature 20 50Hz 60Hz Middle of Middle of Maximum Minimum Differential Maximum Minimum Differential cycle...
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Conditions Note:This data does not represent a guarantee of product performance. Ambient temperature: 20/30 Load: Unloaded Distribution data Temperature of the cycle in each area (SV=-70 air temperature) Unit: Ambient temperature 20 50Hz 60Hz Middle of Middle of Maximum Minimum Differential Maximum Minimum Differential cycle...
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Description of 'Function mode' in the chapter, Control specifications is misprinted. Correction is done as follow. Control specifications P.17 'Function mode' <Old> Model code '003': MDF-C8V1 <New> Model code '001': MDF-C8V1 RoHS This product does not contain any hazardous substances prohibited by the RoHS Directive.
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Category : ULTRA-LOW TEMP. FREEZER Date : 12 Nov. 2009 Model : Effective from : MDF-C8V1 Destination : REF : No. Issue Number : SM9910171 1) Descriptions of the chapter, Cooling unit parts, in page 5 are partially wrong. Correct descriptions are follow.
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FILE NO. PRODUCTION CHANGE SERVICE ADD INFORMATION PRODUCT IMPROVEMET Please add the following NOTICE to the Manuals listed below. ULTRA-LOW TEMP. FREEZER Feb.20, 2013 Category: Date: MDF-C8V1 Model: Destination: SM9910171 SM9910171 M-13-003-E188 M-13-003-E188 Ref No: Ref No: Issued No. Issued No.
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SERVICE FOR RoHs PRODUCT IMPROVEMET Please add the following NOTICE to the original manual, SM9910171. ULTRA-LOW TEMP. FREEZER Jun.8, 2015 Category: Date: MDF-C8V1 Model: Destination: SM9910171 E230 Ref No: Issued NOTICE This is the correction for the incorrect descriptions about "Reset of accumulation time" of fan motor in the page15 and 19 of Service Manual, SM9910171.
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FOR RoHS PRODUCT IMPROVEMET Please add the following NOTICE to the Manuals listed below. Ultra Low Temperature Freezer Jan. 6, 2016 Category: Date: MDF-C8V1 Model: SM9910171 E299 Ref No: Issued No. NOTICE This is the correction for the incorrect descriptions about "Refrigerant"...
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E301 Ref No: Issued No. NOTICE Because of parts discontinuance, below parts have been changed of Service Manual 1. Effective Models and Production MDF-C8V1-PK, PR S/N: 15100227~ 2. Change Description Contents Upon unit repair: - You should use 'MU-N49' - You shoud use 'MU-N49 or MU-N48' for servicing.
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FOR RoHS PRODUCT IMPROVEMENT Please add the following NOTICE to the Service Manuals listed below. Ultra Low Temperature Freezer May 30, 2016 Category: Date: MDF-C8V1 Model: SM9910171 E323 Ref No: Issued No. NOTICE Because of parts discontinuance, below parts have been changed.
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PRODUCT IMPROVEMENT Please add the following NOTICE to the Service Manuals listed below. Category: Date: Ultra Low Temperature Freezer Jan. 31, 2017 Model: MDF-C8V1 Ref No: Issued No. SM9910171 E418 NOTICE Because of parts discontinuance, below parts have been changed.
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Page 6 of 27 MDF-C8V1 (1φ220V50Hz) AT30℃ Pull-down & Pull-up Temperture Pull-down(220V50Hz) Pull-up -100 Time[hour] AT35℃ Pull-down Temperture 1/2H (220V50Hz) EVA IN (220V50Hz) EVA OUT (220V50Hz) Pd[MPa] (220V50Hz) Ps[MPa] (220V50Hz) -100 -120 Time[hour] AT35℃ Pull-down Current-Input 1000 W (220V50Hz) A (220V50Hz)...
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Page 7 of 27 MDF-C8V1 (1φ230V 50Hz) AT30℃ Pull-down & Pull-up Temperture Pull-down(230V50Hz) Pull-up -100 Time[hour] AT35℃ Pull-down Temperture 1/2H (230V50Hz) EVA IN (230V50Hz) EVA OUT (230V50Hz) Pd[MPa] (230V50Hz) Ps[MPa] (230V50Hz) -100 -120 Time[hour] AT35℃ Pull-down Current-Input 1000 W (230V50Hz) A (230V50Hz)...
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Page 8 of 27 MDF-C8V1 (1φ240V 50Hz) AT30℃ Pull-down & Pull-up Temperture Pull-down(240V50Hz) Pull-up -100 Time[hour] AT35℃ Pull-down Temperture 1/2H (240V50Hz) EVA IN (240V50Hz) EVA OUT (240V50Hz) Pd[MPa] (240V50Hz) Ps[MPa] (240V50Hz) -100 -120 Time[hour] AT35℃ Pull-down Current-Input 1000 W (240V50Hz) A (240V50Hz)...
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Page 9 of 27 MDF-C8V1 (1φ110V 60Hz) AT30℃ Pull-down & Pull-up Temperture Pull-down(110V60Hz) Pull-up -100 Time[hour] AT35℃ Pull-down Temperture 1/2H (110V60Hz) EVA IN (110V60Hz) EVA OUT (110V60Hz) Pd[MPa] (110V60Hz) Ps[MPa] (110V60Hz) -100 -120 Time[hour] AT35℃ Pull-down Current-Input 1000 (110V60Hz) (110V60Hz) Time[hour]...
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Page 10 of 27 MDF-C8V1 (1φ115V 60Hz) AT30℃ Pull-down & Pull-up Temperture Pull-down(115V60Hz) Pull-up -100 Time[hour] AT35℃ Pull-down Temperture 1/2H (115V60Hz) EVA IN (115V60Hz) EVA OUT (115V60Hz) Pd[MPa] (115V60Hz) Ps[MPa] (115V60Hz) -100 -120 Time[hour] AT35℃ Pull-down Current-Input 1000 (115V60Hz) (115V60Hz) Time[hour]...
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Page 11 of 27 MDF-C8V1 (1φ220V 60Hz) AT30℃ Pull-down & Pull-up Temperture Pull-down(220V60Hz) Pull-up -100 Time[hour] AT35℃ Pull-down Temperture 1/2H (220V60Hz) EVA IN (220V60Hz) EVA OUT (220V60Hz) Pd[MPa] (220V60Hz) Ps[MPa] (220V60Hz) -100 -120 Time[hour] AT35℃ Pull-down Current-Input 1000 W (220V60Hz) A (220V60Hz)...
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Page 12 of 27 MDF-C8V1 Temperature Uniformity - 15points measured (Reference Data) ※TOP in the figure is that of the top surface of the inner lid CHAMBER 50mm HIGH 212.5mm RIGHT MIDDLE BACK FRONT FRONT 212.5mm 50mm BOTTOM 202.5mm 202.5mm...
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Page 13 of 27 MDF-C8V1(-PT) Internal Temperature Uniformity (Reference Data) <Conditions> Ambient temperature: 23/30℃ Load: Unloaded <Distribution data> Temperature of the cycle in each area (SV=-80℃、air temperature) Unit:℃ Ambient temperature 23℃ 110V 60Hz Middle of Maximum Minimum Differential cycle ①...
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Page 14 of 27 <Distribution data> Temperature of the cycle in each area (SV=-70℃、air temperature) Unit:℃ Ambient temperature 23℃ 110V 60Hz Middle of Maximum Minimum Differential cycle ① -67.5 -71.6 -69.6 ±2.1 Left back ② -68.0 -71.5 -69.8 ±1.8 Right back ③...
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Page 15 of 27 AT23℃ 110V60Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT23℃ 110V60Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 110V60Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 110V60Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min]...
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Page 16 of 27 MDF-C8V1(-PA) Internal Temperature Uniformity (Reference Data) <Conditions> Ambient temperature: 23/30℃ Load: Unloaded <Distribution data> Temperature of the cycle in each area (SV=-80℃、air temperature) Unit:℃ Ambient temperature 23℃ 115V 60Hz Middle of Maximum Minimum Differential cycle ①...
Page 17 of 27 <Distribution data> Temperature of the cycle in each area (SV=-70℃、air temperature) Unit:℃ Ambient temperature 23℃ 115V 60Hz Middle of Maximum Minimum Differential cycle ① -67.5 -71.6 -69.6 ±2.1 Left back ② -68.0 -71.5 -69.8 ±1.8 Right back ③...
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Page 18 of 27 AT23℃ 115V60Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT23℃ 115V60Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 115V60Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 115V60Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min]...
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Page 19 of 27 MDF-C8V1(-PK/-PR) Internal Temperature Uniformity (Reference Data) <Conditions> Ambient temperature: 23/30℃ Load: Unloaded <Distribution data> Temperature of the cycle in each area (SV=-80℃、air temperature) Unit:℃ Ambient temperature 23℃ 220V 60Hz Middle of Maximum Minimum Differential cycle ①...
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Page 20 of 27 <Distribution data> Temperature of the cycle in each area (SV=-70℃、air temperature) Unit:℃ Ambient temperature 23℃ 220V 60Hz Middle of Maximum Minimum Differential cycle ① -67.1 -71.5 -69.3 ±2.2 Left back ② -67.1 -71.3 -69.2 ±2.1 Right back ③...
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Page 21 of 27 AT23℃ 220V 60Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT23℃ 220V 60Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 220V 60Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 220V 60Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min]...
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Page 22 of 27 MDF-C8V1(-PE) Internal Temperature Uniformity (Reference Data) <Conditions> Ambient temperature: 23/30℃ Load: Unloaded <Distribution data> Temperature of the cycle in each area (SV=-80℃、air temperature) Unit:℃ Ambient temperature 23℃ 220V 50Hz 230V 50Hz 240V 50Hz Middle of Middle of...
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Page 23 of 27 <Distribution data> Temperature of the cycle in each area (SV=-70℃、air temperature) Unit:℃ Ambient temperature 23℃ 220V 50Hz 230V 50Hz 240V 50Hz Middle of Middle of Middle of Maximum Minimum Differential Maximum Minimum Differential Maximum Minimum Differential cycle cycle cycle...
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Page 24 of 27 AT23℃ 220V50Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT23℃ 220V50Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 220V50Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 220V50Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min]...
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Page 25 of 27 AT23℃ 230V50Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT23℃ 230V50Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 230V50Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 230V50Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min]...
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Page 26 of 27 AT23℃ 240V50Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT23℃ 240V50Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 240V50Hz SV=-80℃ ⑤ ⑩ ⑮ Time scale[min] AT30℃ 240V50Hz SV=-70℃ ⑤ ⑩ ⑮ Time scale[min]...
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E429 Ref No: Issued No. NOTICE Because of parts discontinuance, P.C.B. and switching power supply have been changed. 1. Effective Models and Production MDF-C8V1-PA, PC, PE, PK, PR, PT S/N: 15110233~ MDF-C8V1-SE S/N: 15120009~ 2. Change description 1) P.C.B. New type P.C.B. is NOT compatible with old type P.C.B.
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Notice PRODUCTION CHANGE CORRECTION FILE NO. ADD INFORMATION SERVICE FOR RoHS PRODUCT IMPROVEMET Please add the following NOTICE to the Manuals listed below. Products charged Fluorinated gas Jul. 12, 2017 Category: Date: Refer to separate sheet PE model Model: Destination: E432 Ref No: Issued No.
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*Revision history Revision # Date of revision Reason of revision SM9910171-01 Feb.17, 2009 Correct misprint in P17 "Function mode". SM9910171-02 Nov.12, 2009 Correct descriptions in P5 "Cooling unit parts" and P8 "Electric parts". SM9910171-03 Feb.20, 2013 Charging amount of n-Pentane before charging mix gas. SM9910171-04 Jul.
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