Phcbi MDF-C8V1 Bedienungsanleitung

and distribution is a violation of law

Service Manual

Ultra-Low Temperature Freezer

PHC Corporation

Biomedical Div.

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 220V 50Hz

823 012 56 110V 60Hz

Contents

Page

Specifications ------------------------------------------------ 1

- Structural specifications

- Control specifications

- Performance specifications

Dimensions ------------------------------------------------ 4

Cooling unit parts ---------------------------------------------- 5

Cooling circuit ---------------------------------------------- 6

Components on PCB ------------------------------------------- 7

Electric parts ---------------------------------------------- 8

Specifications of sensor -------------------------------------- 9

Wiring diagram ------------------------------------------------ 10

Circuit diagram ------------------------------------------------ 11

Connections on PCB ------------------------------------------ 12

Control specifications --------------------------------------- 13

Parts layout ------------------------------------------------ 22

Test data ------------------------------------------------ 25

- Pull-up & Pull-down temperature

- Pull-down temperature

- Pull-down pressure

- Pull-down current input

- Temperature uniformity (15points measured)

Instruction manual ---------------------------------------------- 34

Upon unit repair:

- Be sure to collect refrigerant thoroughly and pull vacuum for 5 minutes

at least, before you repair the unit. It may be caused fire in welding

process by using ‘R-600’.

- You should use ‘MU-N49’ for servicing.

Procedures for trial operation:

1. Turn all the switches (Power SW and Battery SW) off beforehand.

2. Connect the plug to outlet then turn Power SW on.

3. Turn Battery SW on.

(Note) If you turn battery switch on prior to turn power switch on,

buzzer should be emitted until the unit is reached to setting

temperature.

Specifications

ŶStructural specifications

Item Specifications

External dimensions W 550 × D 685 (+83)* × H 945㧔mm㧕

Internal dimensions W 405 × D 490 × H 425(mm)

Effective capacity 84 L

Exterior Painted steel

Interior Painted steel

Door Painted steel

Insulation Cabinet; Rigid polyurethane foamed-in place

and VIP(vacuum insulation panel)

Door; Rigid polyurethane foamed-in place

Door lock 1pc (also used as a latch)

Caster 4pc,㧔2 leveling foot㧕

Access port Ǿ17mm, back side, bottom

Refrigeration circuit Primary cooling system

Compressor Hermetic rotary type, 400W

Evaporator Tube on sheet type (also used as a inner cabinet)

Condenser Finless tube type

Refrigerant HFC mixed refrigerant (R245fa/R600/R23/R14)

Refrigerant oil Ze-NIUSL22SA

Power supply Local voltage

Weight 67 kg

Accessory 1 set of key, 1 scraper

Optional component Automatic temperature recorder (MTR-85H, MTR-G85)

Mounting kit for MTR-85H (MDF-S3085)

Recorder sensor cover (MTR-C8)

Back-up system (CVK-UB4)

Back-up mounting plate (MDF-UBK)

Inventory rack (IR-207C, IR-305C)

* means the dimension of projected area.



ŶControl specifications

Item Specifications

Cooling performance -80(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(1increment)

Set value kept in non-volatile memory

Temperature sensor Pt.1000ǡ

Temperature display LED digital display㧔1increment㧕

High temp. Selectable +5~+20for high temp. alarm (Initial; +10)

ALARM lamp blinks and intermittent buzzer sounds with

15min.of delay

Remote alarm contact: Normal Open, rating 30VDC, 2A

Temperature alarm turns on during power failure

(not linked with buzzer)

Low temp. Selectable -5~-20for low temp. alarm (Initial; -10)

ALARM lamp blinks and intermittent buzzer sounds with

15min.of delay

Remote alarm contact: Normal Open, rating 30VDC, 2A

Temperature alarm turns on during power failure

(not linked with buzzer)

Power failure ALARM lamp blinks with intermittent buzzer sounds, remote

alarm outputs.

Remote alarm 3P remote alarm terminal: Maximum 30VDC, 2A

NC-COMޔNO-COM

Outputs during temperature alarm and power failure alarm.

Battery check BATTERY lamp is lit when accumulation time is about 3 yrs

Alarms

Fan motor check BATTERY lamp blinks when accumulation time is about 6 yrs

Control panel Lamp: ALARM, BATTERY

BUZZER: Buzzer key

ALARM TEST: Alarm test key

SET: To switch SV and PV

㧪: To shift the digit

ȁ: To change the digit

Key lock function With 㧪key is pressed for 5 seconds;

L0: Unlocked L1: Locked

Temp. control sensor abnormality

zError code and chamber temp. are alternately displayed.

zRemote alarm contact is ON and the buzzer sounds.

Self diagnosis function

Fan motor malfunction

zError code and chamber temp. are alternately displayed.

zALARM lamp blinks and buzzer sounds.

Power switch Breaker switch

Compressor protection Internal thermostat and comp. sensor



ŶPerformance specifications

Cooling performance -80(ambient temperature; 30, no load)

Temp. control range -60to -80(ambient temperature; 30, no load)

Rated voltage AC110V AC115V AC220V AC230V AC240V AC220V

Rated frequency 60Hz 60Hz 50Hz 50Hz 50Hz 60Hz

Rated power consumption 330W 340W 310W 330W 365W 350W

Noise level 47 dB [A] (background noise; 20dB)

Maximum pressure 3.5MPa

Note) Specifications will be subject to change without notice.

Dimensions

Cooling unit parts

<MDF-C8V>

Item Specifications

Compressor

115V, 60Hz Type: C-2SN400L2W Compressor code: 807 780 22

220/230/240V,50Hz Type: C-2SN400L5W Compressor code: 807 780 25

Refrigerant oil Ze-NIUSL22SA Charged q’ty: 280cc

Cooling system Forced air cooling

Condenser

Type Finless tube Cascade condenser

Condenser 8 columns x 2 lines Coil pipeW200 mm x 8 columns

Pre-condenser 7 columns x 1 line P290 mm

Frame pipe Ǿ4.76 x T0.7 mm

Evaporator

Type

Ǿ7.94 x T0.7 mm

Tube on sheet (also used as interior)

Capillary tube Ǿ1.2

Resistance (PSI kg/cm2) 0.59 MpaG

Length (mm) 2000

Outer diameter (mm) Ǿ1.8

Refrigerant HFC mixed refrigerant: MU-N48(EU)/(DOT)Charged q’ty: 375+/-8 g

Dryer Dry core: D-SM032T Charged q’ty: 35g

Condensing fan Ǿ196 mm, 4 blades

Material: ABS

(115V, 60Hz) SE4-D041N1P Output: 4W

Condensing fan

motor (220/230/240V, 50Hz) SE4-D041N5P Output: 4W



Cooling circuits

Components on PCB

CN3

#1-#3

To Remote alarm terminal

CN4

#1-#2

To Temp. control relay

CN2

#1-#6

To MTR-480

(Option)

CN1

#1-#3

To Switching

Power supply

CN8

#1-#2

To Battery

CN11

#1-#3

To Temp.

sensor

CN7

#7-#8

To Comp. sensor

CN6

#1-#12

To Display board

CN5

#1-#5

To control board

#6-#7

To Buzzer

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