Sanyo MDF-U537D, MDF-U537, MDF-U333 Service Manual

Service Manual Biomedical freezer

SANYO Electric Biomedical Co., Ltd.

MDF-U333 MDF-U537

MDF-U537D

MDF-U537

ＳＭ７２１０１３９

Effective models

This service manual is effective following models.

Model name Model code

Voltage and Frequency

MDF-U537 823 168 51 115V 60Hz

823 168 52 220V 50Hz 823 168 53 220V 60Hz 823 168 54 230V 50Hz 823 168 55 240V 50Hz 823 168 56 115V 60Hz 823 168 57 110V 60Hz 824 168 58 230V 50Hz 824 168 59 220V 50Hz 824 168 60 240V 50Hz 825 168 61 825 168 62

MDF-U537D 823 169 51 115V 60Hz

823 169 52 220V 50Hz 823 169 53 220V 60Hz 823 169 54 230V 50Hz 827 169 55 240V 50Hz 823 169 56 240V 50Hz 823 169 57 230V 50Hz 823 169 58 115V 60Hz 823 169 59 110V 60Hz 823 169 60 220V 50Hz 823 169 61 823 169 62

MDF-U333 823 170 51 115V 60Hz

823 170 52 220V 50Hz 823 170 53 220V 60Hz 823 170 54 230V 50Hz 823 170 55 240V 50Hz 823 170 56 110V 60Hz 823 170 57 230V 50Hz 823 170 58 240V 50Hz 823 170 59 220V 50Hz 823 170 60 823 170 61 823 170 62

Contents

･ Feature 1

･ Specification MDF-Ｕ 333 3

MDF-Ｕ 537 5

MDF-Ｕ 537D 7

･ Dimensions MDF-Ｕ 333 9

MDF-Ｕ 537 10

MDF-Ｕ 537D 11

･ Refrigeration circuit 12

Refrigeration circuit principle diagram MDF-Ｕ333 15

Refrigeration circuit welding points MDF-Ｕ 333 16

Refrigeration circuit principle diagram MDF-Ｕ 537 17

Refrigeration circuit welding points MDF-Ｕ 537 18

Refrigeration circuit principle diagram MDF-Ｕ 537D 19

Refrigeration circuit welding points MDF-Ｕ 537D 20

･ Electrical Parts 21

･ Specification of sensor 24

･ Control specification 25

･ Wiring diagram 34

･ Circuit diagram 37

･ Components on P.C.B. 38

･ Test data 39

･ Parts loyout 49

･ User’smanual 50

Features

＜ＭＤＦ－Ｕ３３３＞

＜ＭＤＦ－Ｕ３３３＞＜ＭＤＦ－Ｕ３３３＞

■ HFC refrigerant

Refrigerant circuit contains HFC refrigerant that effect to environment little.

Latest cooling system reduces negative factor to global environment. With ambient temperature at 35℃, while temperature of inside chamber maintains -30℃.

■ PCM structure

PCM structure reduces amount of organic solvent.

■ Temperature control function Unified temperature control range for same categories realized to set -20℃, which

is suitable for reagent preservation.

■ Specification unified

Unified specification for same categories, which also realized to unify performance for high/low temperature alarm (SV is changeable in the range ±5～±15℃), power failure

alarm, remote alarm terminal, setting memorization by non-volatile memory.

Adopt new microprocessor system for display panel and keypad makes operation easily.

■ Self diagnosis function

Abnormal condition for temperature sensor is indicated by self-diagnosis system.

■ Validation

Control panel enables zero “0” adjust for validation.

■ New door latch mechanism

New door latch is adopted in order to close door surely for reagents.

It is also available to use individual lock mechanism.

■ Insulation wall thickness

Unit has necessary insulation performance for each temperature range.

Combination of PCM and frame form makes 610mm for frame size commonly.

■ Option

Internal temperature observation system is option.

Unit has communication function corresponding to it.

−1−

Features

＜ＭＤＦ－Ｕ５３７，５３７Ｄ＞

＜ＭＤＦ－Ｕ５３７，５３７Ｄ＞＜ＭＤＦ－Ｕ５３７，５３７Ｄ＞

■ HFC refrigerant

Refrigerant circuit contains HFC refrigerant that effect to environment little.

Latest cooling system reduces negative factor to global environment. With ambient temperature at 35℃, while temperature of inside chamber maintains -30℃.

■ PCM structure

PCM structure reduces amount of organic solvent.

■ Temperature control function New cooling system realizes to set -20℃, which is suitable for reagent preservation.

■ Specification unified

Unified specification for same categories, which also realized to unify performance for high/low temperature alarm (SV is changeable in the range ±5～±15℃), power failure

alarm, remote alarm terminal, setting memorization by non-volatile memory.

Adopt new microprocessor system for display panel and keypad makes operation easily.

■ Self diagnosis function

Abnormal condition for temperature sensor is indicated by self-diagnosis system.

■ Validation

Control panel enables zero “0” adjust for validation.

■ New door latch mechanism

New door latch is adopted in order to close door surely for reagents.

It is also available to use individual lock mechanism.

■ Draw box for reagent preservation

100mm for depth of box makes things easily to arrange and take in & out.

(Adopted in bottom chamber of MDF-U537/U537D)

■ Compressor protection function

Sensor detects compressor’s warming up to control unit running.

− 2 −

Specification

MDF-U333

Items Specification

Model description Biomedical freezer

Model Number MDF-U333

Outer dimension Inner dimension W 490 × D 485 × H 1290 mm

Effective chamber capacity 274 lit.

Exterior Zinc galvanized steel w/powder polyester coating (PCM)

Interior Polystyrene resin

Insulation Rigid polyurethane foam

Outer door 1 pc, Zinc galvanized steel w/powder polyester coating (PCM)

Latch 1 pc

Door lock 1 pc

Basket

Accessories

Others Defrosting spatula 1 pc, key 1 set, 4 card holders

Caster 4 pcs

Leveling legs 2 pcs (with caster) Access hole φ 30mm. 1 place in left side.

Weights 81 Kg

Evaporator Tube on sheet type (function both evaporator and shelf)

Condenser Wire and tube type

Compressor Hermetic type 225W

W 614 × D 733 × H 1620 mm

(Max)

(L) 4 pcs Inner dimension: W446×D369×H220 mm (S) 1 pc (for bottom column) Inner dimension:

W

487×D221×H155mm

Refrigerant

Cooling performance -30℃ (internal 1/2h air temperature, AT：35℃, no load)

Internal temperature control range

Power supply Local voltage

HFC refrigerant

R-134a

-20℃~-30℃ (AT：5℃~35℃、no load)

− 3 −

MDF-U333

Items Specification

Temperature controller

Microprocessor controlled system with non-volatilized memory. Temp. set range : -18℃～-40℃

Temperature sensor Thermistor

Temperature display

High/Low Temperature

Alarm

Power failure

Remote alarm contact

LED digital display (green colored) by 1℃. Range : -50℃～50℃ Changeable SV±5℃～15℃. (Initial SV±10℃) ALARM lamp brinks and buzzer sounds intermittently

(about 15 min. delay) Remote alarm contact: turns ON during power failure alarm. ALARM lamp brinks, buzzer sounds intermittently, remote alarm contact turns ON during power failure alarm. Remote alarm terminal 3P: contact capacity DC30v, Max2A, N.O. –COM. (During power failure, temperature alarm: ON) ALARM lamp BUZZER: Buzzer key ALARM TEST: Alarm test key

Control panel

Operation panel

SET: To switch the SV and PV

＞: To shift the set digit ∧: To change the SV

DEF: Defrost key

Rear

Key lock function

Power switch (Breaker switch) Battery switch: Power failure alarm switch

Press ＞ key for five seconds L0: Unlock L1: Lock When each sensor is in fault,

Self diagnosis function

Error code and internal temperature are displayed alternately. Remote alarm contact turns ON with buzzer sounds.

Power switch Breaker switch

Compressor protection Overload relay

Chart recorder: MTR-G85

Option

Mounting kit: MPR-S7(for bottom mounting) : MDF-S740T(for top mounting)

− 4 −

Specification

MDF-U537

Items Specification

Model description Biomedical freezer

Model Number MDF-U537 Outer dimension (Max) W 804 × D 772 × H 1802 mm Inner dimension W 658 × D 607 × H 1272 mm

Effective chamber capacity 482 lit.

Exterior Zinc galvanized steel w/powder polyester coating (PCM)

Interior Polystyrene resin

Insulation Rigid polyurethane foam

Outer door

Latch 2 pcs

Door lock 1 pc

Basket

Accessories

Others Defrosting spatula 1 pc, key 1 set, 14 card holders

Caster 4 pcs

Zinc galvanized steel w/powder polyester coating (PCM) 2 pcs (upper and lower compartment)

(M) 6 pcs (upper compartment)

W

Inner dimension:

290×D536×H136 mm

(S) 8 pcs (lower compartment)

W

Inner dimension:

290×D536×H100mm

Leveling legs 2 pcs (with caster) Access hole φ 30mm. 1 place on rear.

Weights 131 Kg

Evaporator Tube on sheet type (function both evaporator and shelf)

Condenser Wire and tube type

Compressor Hermetic type 350W

HFC refrigerant

Refrigerant

R-407D

Cooling performance -30℃ (internal 1/2h air temperature, AT：35℃, no load)

Internal temperature control range

-20℃~-30℃ (AT：5℃~35℃、no load)

Power supply Local voltage

− 5 −

MDF-U537

Items Specification

Temperature controller

Microprocessor controlled system with non-volatilized memory. Temp. set range : -18℃～-40℃

Temperature sensor Thermistor 2P

Temperature display

High/Low Temperature

Alarm

Power failure

Remote alarm contact

LED digital display (green colored) by 1℃. Range : -50℃～50℃ Changeable SV±5℃～15℃. (Initial SV±10℃) ALARM lamp brinks and buzzer sounds intermittently

(about 15 min. delay) Remote alarm contact: turns ON during power failure alarm. ALARM lamp brinks, buzzer sounds intermittently, remote alarm contact turns ON during power failure alarm. Remote alarm terminal 3P: contact capacity DC30v, 2A, N.O. –COM. (During power failure, temperature alarm: ON) ALARM lamp BUZZER: Buzzer key ALARM TEST: Alarm test key

Control panel

Operation panel

SET: To switch the SV and PV

＞: To shift the set digit ∧: To change the SV

DEF: Defrost key

Rear

Key lock function

Power switch (Breaker switch) Battery switch: Power failure alarm switch

Press ＞ key for five seconds L0: Unlock L1: Lock When each sensor is in fault,

Self diagnosis function

Error code and internal temperature are displayed alternately. Remote alarm contact turns ON with buzzer sounds.

Power switch Breaker switch

Overload relay Detect temperature near compressor by thermistor sensor to control

Compressor protection

compressor during overload. Alarm: Error code and internal temperature are displayed alternately. Remote alarm contact turns on with buzzer sounds. Chart recorder: MTR-G85

Option

Mounting kit: MPR-S7(for bottom mounting) : MDF-S740T(for top mounting)

− 6 −

Specification

MDF-U537D

Items Specification

Model description Biomedical freezer

Model Number MDF-U537D

Outer dimension

Inner dimension

W 804 × D 772 × H 1802 mm

(Max)

Upper chamber W 658 × D 607 × H 589 mm Lower chamber W 658 × D 607 × H 603 mm

Effective chamber capacity 452 lit.

Exterior Zinc galvanized steel w/powder polyester coating (PCM)

Interior Polystyrene resin

Insulation Rigid polyurethane foam

Outer door

Zinc galvanized steel w/powder polyester coating (PCM) 2 pcs (upper and lower compartment)

Latch 2 pcs

Door lock 1 pc

(M) 6 pcs (upper compartment)

W

290×D536×H136 mm

W

290×D536×H100mm

Accessories

Basket

Inner dimension: (S) 8 pcs (lower compartment) Inner dimension:

Others Defrosting spatula 1 pc, key 1 set, 14 card holders

Caster 4 pcs

Leveling legs 2 pcs (with caster) Access hole φ 30mm. 2 places on rear.

Weights 136 Kg

Evaporator Tube on sheet type (function both evaporator and shelf)

Condenser Wire and tube type

Compressor Hermetic type 350W

HFC refrigerant

Refrigerant

R-407D

Cooling performance -30℃ (internal 1/2h air temperature, AT：35℃, no load)

Internal temperature control range

-20℃~-30℃ (AT：5℃~35℃、no load)

Power supply Local voltage

− 7 −

MDF-U537D

Items Specification

Temperature controller

Microprocessor controlled system with non-volatilized memory. Temp. set range : -18℃～-40℃

Temperature sensor Thermistor 2P (upper and lower compartment)

LED digital display (green colored) by 1℃.

Temperature display

Range : -50℃～50℃ Selectable to display upper or lower compartment by switch.

High/Low Temperature

Alarm

Power failure

Remote alarm contact

Changeable SV±5℃～15℃. (Initial SV±10℃) ALARM lamp brinks and buzzer sounds intermittently (about 15 min. delay) Remote alarm contact: turns ON during power failure alarm. ALARM lamp brinks, buzzer sounds intermittently, remote alarm contact turns ON during power failure alarm. Remote alarm terminal 3P: contact capacity DC30v, 2A, N.O. –COM. (During power failure, temperature alarm: ON) ALARM lamp BUZZER: Buzzer key ALARM TEST: Alarm test key

Control panel

Operation panel

SET: To switch the SV and PV

＞: To shift the set digit ∧: To change the SV

DEF: Defrost key TOP/BOTTOM: Switch key to display upper or lower compartment.

Rear

Key lock function

Power switch (Breaker switch) Battery switch: Power failure alarm switch

Press ＞ key for five seconds L0: Unlock L1: Lock When each sensor is in fault,

Self diagnosis function

Error code and internal temperature are displayed alternately. Remote alarm contact turns ON with buzzer sounds.

Power switch Breaker switch

Overload relay Detect temperature near compressor by thermistor sensor to control

Compressor protection

compressor during overload. Alarm: Error code and internal temperature are displayed alternately. Remote alarm contact turns on with buzzer sounds. Chart recorder: MTR-G85

Option

Mounting kit: MPR-S7(for bottom mounting) : MDF-S740T(for top mounting)

− 8 −

Dimensions

＜＜＜＜MDF-U333＞＞＞＞

−9−

Dimensions

＜＜＜＜MDF-U537＞＞＞＞

−10−

Dimensions

＜＜＜＜MDF-U537D＞＞＞＞

−11−

Refrigeration circuit

MDF-U333 Unit：ｍｍ

Parts description Specification

Evaporator

Dehydrator

Capillary tube

Condenser assembly A

Condenser assembly B

Frame pipe

Evacuation and vacuum pressure

Refrigerant and oil

Refrigeration circuit spec. and welding points

Type Tube on sheet Material Aluminum (φ 8.0)

Type of molecular sieves

４A-XH9（134 stamped）

Charged q’ty 8±1g Resistance 0.686MPaG （7Kgｆ／㎠ G）

Dimension φ 1.8×(φ 0.65)×2000mm Resistance indicator color White Type Wire and tube Dimension

w

480×P40×30 columns

Type Wire and tube Dimension

w

480×P40×30 columns

Note: Lower 2 columns are used in desuper circuit.

Material C1220T-1/2H Dimension

φ 4.0×

ｔ

0.5

Evacuation time: over than 20min. by 2 ports (high pressure and low pressure side). (N2 exchange) When charged, vacuum pressure is lower than 1.0torr （pump capacity： 300L/min）

Refrigerant : R-134a Charged q’ty : 226±5g Oil : CF－32 Charged q’ty : 230±10cc Oil additive: n-pentane Charged q’ty : 14g

Refer to following pages

−12−

Refrigeration circuit

MDF-U537 Unit：ｍｍ

Parts description Specification

Evaporator

Upper (1) Lower (1) Bottom (3)

Dry core

Type 9lines×1column×5pcs

Material Aluminum (φ 8.0)

Type D-S032T Manufacturer SANYO Solid core 50cm

Capillary tube (Total number: 2)

Resistance 0.725MPaG （7.4Kgｆ／㎠ G） Dimension φ 1.8×L4500 Resistance indicator color Blue

Condenser assembly front (Total number: 4)

Frame pipe

Type Wire and tube Dimension

Material C1220T Dimension

Evacuation and vacuum pressure

Evacuation time: over than 20min. by 2 ports (high pressure and low pressure side). (N2 exchange) When charged, vacuum pressure is lower than 1.0torr （pump capacity： 300L/min）

Refrigerant and oil

Refrigerant : R-407D Charged q’ty : 301±5g Oil : CF－32 Charged q’ty : 280±10cc Oil additive: n-pentane Charged q’ty: 19g

Refrigeration circuit spec. and welding points

Refer to following pages

3

w

480×P40×6 columns

L

φ 4.0×

ｔ

0.5×

7470

−13−

Refrigeration circuit

MDF-U537D Unit：ｍｍ

Parts description Specification

Evaporator assembly

Upper (1)

Type 9lines×1column×5pcs

Lower (1) Bottom (2)

Material Aluminum (φ 8.0)

Lower entrance (1)

Dry core

Type D-S032T Manufacturer SANYO Solid core 50cm

Capillary tube

Upper compartmnt Lower compartmnt Resistance 10.3Kg/㎠ G 9.9Kg/㎠ G Dimension φ 1.8×L4000 φ 1.8×L3000 Resistance indicator color Yellow Red

Condenser assembly front (Total number: 4)

Frame pipe

Type Wire and tube Dimension

Material C1220T Dimension

Evacuation and vacuum pressure

Evacuation time: over than 20min. by 2 ports (high pressure and low pressure side). (N2 exchange) When charged, vacuum pressure is lower than 1.0torr （pump capacity： 300L/min）

Refrigerant and oil

Refrigerant : R-407D Charged q’ty : 357±5g Oil : CF－32 Charged q’ty : 280±10cc Oil additive: n-pentane Charged q’ty : 23g

Refrigeration circuit spec. and welding points

Refer to following pages

3

w

480×P40×6 columns

φ 4.0×

ｔ

0.5×L7470

−14−

Refrigeration circuit principle diagram