Phcbi MDF-C8V1 Bedienungsanleitung
©2018PHC Corporation
All rights reserved. Unauthorized copying
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.
1
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.
2
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(1increment)
Set value kept in non-volatile memory
Temperature sensor Pt.1000ǡ
Temperature display LED digital display㧔1increment㧕
High temp. Selectable +5~+20for 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~-20for 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
zError code and chamber temp. are alternately displayed.
zRemote alarm contact is ON and the buzzer sounds.
Self diagnosis function
Fan motor malfunction
zError code and chamber temp. are alternately displayed.
zALARM lamp blinks and buzzer sounds.
Power switch Breaker switch
Compressor protection Internal thermostat and comp. sensor
3
ŶPerformance specifications
Cooling performance -80(ambient temperature; 30, no load)
Temp. control range -60to -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.
4
Dimensions
5
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 pipeW200 mm x 8 columns
Pre-condenser 7 columns x 1 line P290 mm
ʊ
Frame pipe Ǿ4.76 x T0.7 mm
ʊ
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
<Compressor terminals layout>
C
S
R
6
Cooling circuits
7
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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