Sanyo MDF-U53V, MDF-U53VC Service Manual

RoHS

This product does not contain any hazardous substances prohibited by the RoHS Directive.
(You will find ‘RSF’ mark near the rating plate on the RoHS compliant product.)

WARNING

* You are requested to use RoHS compliant parts for maintenance or repair.
* You are requested to use lead-free solder.

SM9910073

SANYO Electric Co., Ltd.

Biomedical Business Unit

Service Manual

Ultra-Low Temperature Freezer

MDF-U53V
MDF-U53VC

FILE No.

Effective models

Following units are effective in this manual.

Model name Product code Voltage and Frequency

MDF-U53V 823 190 51 220V 50Hz

823 190 52 220V 60Hz
823 190 53 220V 60Hz
823 190 54 230/240V 50Hz
823 190 55 220V 50Hz

MDF-U53VC 823 190 80 220V 60Hz

Contents

㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷

Page

Comparison MDF-U53V with MDF-U52V --------------------------------------- 1

Specifications --------------------------------------------- 2

* Structural specifications

* Control specifications

* Performance specifications

Dimensions ---------------------------------------------- 5

Refrigeration circuit

---------------------------------------------------

6

Refrigeration circuit welding points ---------------------------------------------- 7

Cooling unit parts ---------------------------------------------- 8

Components on PCB ---------------------------------------------- 9

Electrical parts ---------------------------------------------- 10

Specifications of sensor ---------------------------------------------- 11

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

Wiring diagram ---------------------------------------------- 13

Circuit diagram ---------------------------------------------- 15

Control specifications

---------------------------------------------------

16

Parts layout

---------------------------------------------------

25

Test data ---------------------------------------------- 27

* Pull-down data

* Pull-up data

* H/L EVA out data

* Unit pressure data

* Power consumption data

* Temperature uniformity

* Sample load test

Instruction Manual ---------------------------------------------- 32

1

Comparison MDF-U53V with MDF-U52V

Item MDF-U52V MDF-U53V Remarks

Compressor Sanyo Toshiba career Toshiba compressor has

been cooperated

development.
H stage side 1100W 1100W
L stage side 1100W 1100W

Filter alarm FILTER lamp is lit FILTER lamp is lit and buzzer

sounds intermittently

2.8yrs, battery accumulating
time
䋨BATTERY lamp is lit䋩

2.8yrs, battery accumulating
time
䋨BATTERY lamp is lit䋩

Input code ‘409’ in F06 to

turn BATTERY lamp off.

You can see accumulation

time in F03.

Notification of
parts change

Fan motor accumulation time,
none

5.6yrs, fan motor accumulating
time
䋨BATTERY lamp is blinking䋩

Input code ‘419’ in F06 to

stop BATTERY lamp

blinking.

You can see accumulation

time in F32.

Overload relay Overload relay

Compressor
protection

䊶H stage side compressor is
ceased when it detects 70C
higher than filter sensor
temperature.
䊶E10 and PV are displayed
alternately.
䋨Buzzer sounds and remote

alarm terminal turns over䋩

䊶 H stage side compressor is
ceased when it detects 60C
higher than filter sensor
temperature.
䊶 E10 and PV are displayed
alternately.
䋨 Buzzer sounds and remote
alarm terminal turns over䋩

When it detects 10C lower

than AT sensor

temperature, H stage side

compressor turns on.

Status 3 Adding test value, SV and AT

makes the compared value.

Compared value = 95䋦䋨fixed䋩

2

㩷 Specifications 㩷

ŶStructural specifications

Item MDF-U53V MDF-U53VC

Name Ultra-low Temperature Freezer

External dimensions W770 × D875 × H1990 (mm)

Internal dimensions W630 × D600 × H1400 (mm)

Effective capacity 519 L

Outer door 1door, painted steel

Inner door 2doors, ABS resin panel with stainless frame

Insulation Vacuum insulation panel + rigid polyurethane foamed-in place

Exterior Painted steel

Interior Painted steel

Shelf

3shelves, stainless steel

Inner dimensions; W608 x D533 (mm) Load; 50kg/shelf

Outer door latch 1pc

Outer door lock 1pc
Caster 4pcs (leveling leg：2pcs)
Monitoring hole 3places inner diameter; ij17mm

Refrigeration circuit Secondary cooling system

Compressor High stage side; Hermetic type, Output; 1100W

Low stage side; Hermetic type, Output; 1100W

Evaporator High stage side; Cascade condenser

Low stage side; Tube on sheet (Sharing with interior)

Condenser High stage side; Fin and Tube type

Low stage side; Cascade condenser

Refrigerant High stage side; R-407D (HFC refrigerant)

Low stage side; R-508 (HFC refrigerant)

Refrigerant oil Ze-NIUS32SA

Power supply Local voltage

Weight 305 Kg 310 Kg

Accessories 1 set of key, 1 scraper

Optional component Automatic temperature recorder(MTR-G85)

Back-up system (CVK-UB2, CVK-UB2(I)); LCO2
Inventory rack (IR-220, IR-224U)
Independent inner door (MDF-5ID)

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3



ŶControl specifications

Item MDF-U53V MDF-U53VC

Temp. controller Microcomputer control system

Temperature setting range: -50°C∼-90°C

Non-volatile memory
Thermal sensor Pt.1000ȍ
Temperature display Digital display

Temperature

+5°C~+20°C for High temperature alarm (Initial; +10°C)

-5°C~-20°C for Low temperature alarm (Initial; -10°C)
ALARM lamp blinks and buzzer sounds intermittently with 15min. delay
Remote alarm contact; Normal Open, Normal Close

Allowable contact capacity; 30VDC, 2A
Door DOOR lamp is list with 2min. delay
Filter check FILTER lamp is lit and buzzer sounds intermittently

Power failure

ALARM lamp blinks, buzzer sounds intermittently and remote alarm is

output.

Remote alarm

Remote alarm terminal 3P; DC30V, 2A

NC-COM, NO-COM

Alarm

Battery check

When approx. 2.8yrs has passed with power switch is on, BATTERY lamp

is lit.

Fan motor check When approx. 5.5yrs has passed with power switch ON, BATTERY lamp

is flashed.

Freezer status monitor

・ Abnormal low voltage (When the power source voltage is 15% less

than the rated voltage)

・ Abnormal ambient temperature (When the ambient temperature is

over 35°C or lower than 0°C)

・ Overloaded run (When the running rate of compressor (L) is over

90％)

Control panel

Lamps: ALARM, BATTERY, STATUS, DOOR, FILTER
Buzzer key: BUZZER
Alarm test key: ALARM TEST
Status key: STATUS
Set key: SET
Digit shift key:
Numerical value shift key:

Key lock function

Press key for 5 seconds to display;

L0: Key lock is off L1: Key lock is on

Sensor abnormality

When any failure is occurred in sensor among temp. sensor, filter sensor,

cascade sensor and AT sensor;

zError code is displayed

zALARM lamp blinks

zRemote alarm is on

zBuzzer sounds intermittently

Compressor protection

When the cascade sensor temperature is lower than -34°C, Compressor

L is turned on.

When the cascade sensor temperature is higher than -12°C, Compressor

L is turned off.

When the overload relay and/or filter sensor is higher than +60°C,

Compressor H is turned off.

Compressor delay time

You can change the delay time both of Compressor L & H as;
2∼15min.

4

㩷

ŶPerformance specifications

Cooling performance

-86°C at the center of the chamber (AT30°C, no load)

Temperature control range

-50°C~-86°C(AT30°C, no load)

Power source 220V, 50Hz 220V, 60Hz 230V, 50Hz 240V, 50Hz

Rated power consumption 1020W 1180W 1070W 1150W

Noise level 49 dB {A} (background noise 20dB)

Maximum pressure 2600 kPa

Usable conditions

AT; +5°C~+30°C Humidity: Less than 80%RH

* Design or specifications will be subject to change without notice.

5



Dimensions



6

Refrigeration circuit

H side

L side

Compressor H

Pre-condenser

Frame pipe

Pre-condenser

Condenser

Dryer H

Capillary tube H

Compressor L

Oil separator

Capillary tube

EX

EX tank

Heat exchanger

Cascade condenser

Capillary tube L

Header

Dryer L

Evaporator

7



Refrigeration circuit welding points





 < Unit Base Ass’y >



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













































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





䌈䌄䌉㩷

䌈䌄㪦㩷

䌈䌄䌁㩷

䌈䌄䌂㩷

䌌䌓䋲

䌈䌃䌉㩷

䌈䌍䌏㩷

䌈䌍䌉㩷

䌈䌃䌏

䌈䌅䌏㩷

䌆䌉㩷

䌆䌏㩷

䌈䌏䌁

䌈䌏䌏䌈䌏䌉㩷

䌈䌏䌂

䌌䌄䌄

䌈䌏䌑

䌈䌏䌐

䌌䌏䌁

䌌䌏䌏㩷

䌌䌏䌉㩷

䌌䌏䌂

䌌䌄䌂

䌈䌏䌓㩷

䌈䌏䌒

䌈䌓䌂

䌈䌓䌁

䌌䌒䌂

䌌䌒䌁

䌈䌃䌃

䌈䌃䌂
䌈䌃䌁

䌏䌒㩷

䌏䌏㩷

䌏䌉㩷

䌌䌋䌉㩷

䌌䌋䌏

䌔䋳㩷

䌔䋲㩷

䌔䋱㩷

䌌䌓䋱

䌌䌓䌂

䌌䌓䌁

䌌䌓䋳

䌌䌂䌃㩷

䌌䌂䌂

䌌䌂䌁㩷

䌌䌃䌃

䌏䌒䋳

䌏䌒䋲

䌏䌒䋱

䌌䌂䌚㩷

䌌䌂䌙㩷

䌅䌘䌏

㪚㪉㩷
㪚㪊㩷
㪚㪋㩷
㪚㪌㩷
㪚㪍㩷
㪚㪎㩷
㪚㪏㩷
㪚㪐㩷
㪚㪈㪇㩷
㪚㪈㪈㩷
㪚㪈㪉㩷
㪚㪈㪊㩷

䌅䌘䌉㩷

䌅㩷

Ｄ

䌆㩷

Compressor L

Compressor H

Ex. tank L

Condenser

Dryer H

Oil separator

8

Cooling unit parts

<MDF-U53V/U53VC>

Specifications

Item

H side L side

Compressor 220V, 60Hz 220V, 50Hz 230/240V, 50Hz

Code 7FB-0-M101-001-06 7FB-0-M101-001-04 7FB-0-M101-001-05

Type KS370J1NS-7A KS370J1NS-4A KS370J1NS-4A1

Refrigerant oil

Ze-NIUS32SA

Charged q’ty: 850cc

Ze-NIUS32SA

Charged q’ty: 850cc

Cooling system

Forced air cooling（partially）

Oil cooler

Forced air cooling（partially）

Oil cooler

Condenser

Type Fin and tube Cascade condenser

Condenser 12 columns x 4 lines P6.35mm

Fin 88pcs.

Coil pipeφ6.35mm

Pre-condenser W 250mm

ʊ

Frame pipe

φ4.76mm

ʊ

Evaporator

Type

Cascade condenser

Shell and tubeφ80mm

Tube on sheet

φ9.52mm

Capillary tube Ex. capillary

Resistance

PSI・kg/cm

2

94 PSI/G 98 PSI/G 34 PSI/G

 Length 1800mm 1200mm 500mm

Outer diameter

φ2.0mm φ2.0mm φ2.4mm

Inner diameter

φ1.0mm (φ0.9mm) φ1.2mm

Refrigerant R-407D Charged q’ty: 564g R-508 Charged q’ty: 260g

Oil additive

n-Pentane

Charged-q’ty: 60cc (36g)

n-Pentane

Charged q’ty: 58cc (36.8g)

Dryer 4A-XH-9 Charged q’ty: 18g 4A-XH-6 Charged q’ty: 58g
Condensing fan

φ230 mm、4 blades

Material: ABS

Condensing fan
motor Type SE4-E11L3P (high stage side)

Oil separator

ʊ

SPK-0S02S2
(810-4-2008)

<Compressor terminals layout>



C

S

R

9

Components on PCB

10

Compressor (H),(L)

Type KS370J1NS-7

A

KS370J1NS-4

A

KS370J1NS-4AI

Code 7FB-0-M101-001-06 7FB-0-M101-001-04 7FB-0-M101-001-05

Rated voltage (50/60Hz) 220V, 60Hz 220/230V, 50Hz 230/240V, 50Hz

Winding resistance C-S(Aux) 1.64㱅 2.53㱅 2.53㱅

C-R(Main) 3.35㱅 4.8㱅 4.8㱅

Starting relay(H), (L)

Type AMVL-300

A

AMVL-300

A

AMVL-300

A

Pick up voltage 215~247VAC(60Hz) 185~217VAC(50Hz) 185~217VAC(50Hz)

Drop out voltage 69~132VAC(60Hz) 60~120VAC(50Hz) 60~120VAC(50Hz)

Parts code 626 100 1503 626 100 1503 626 100 1503

Overload relay (H), (L)

Type MRA999549201 MRA999539201 MRA999539201

Action to the temp. (no current) ON:69±11㷄 OFF:135±5㷄 ON:69±11㷄 OFF:135±5㷄 ON:69±11㷄 OFF:135±5㷄

Action to the current (AT25℃) 29.5A 22.5A 22.5A

Operation time 6~16sec. 6~16sec. 6~16sec.

Parts code 624 226 3173 624 226 3166 624 226 3166
Starting capacitor(H),(L) Rating 250VAC, 10MF 250VAC, 10MF 250VAC, 10MF
Running capacitor (H),(L

)

Rating 400VAC, 25MF 400VAC, 25MF 400VAC, 25MF

Condensing fan moto

r

Type SE4-E11L5P SE4-E11L5P SE4-E11L5P

Rating 220-240VAC 220-240VAC 220-240VAC

Parts code 624 224 0167 624 224 0167 624 224 0167
Cap.tube heater

Rating 230V, 12W 230V, 12W 230V, 12W

Parts code 624 200 0280 624 200 0280 624 200 0280
H Comp. rela

y

Type G4F-11123T G4F-11123T G4F-11123T

Contact capacit

y

20A, 250VAC 20A, 250VAC 20A, 250VAC

Coil 12VDC 12VDC 12VDC

Parts code 624 173 2397 624 173 2397 624 173 2397
Heater rela

y

Type G2R-1A-T G2R-1A-T G2R-1A-T

Contact capacit

y

10A, 250VAC 10A, 250VAC 10A, 250VAC

Coil 12VDC 12VDC 12VDC

Parts code 624 188 9299 624 188 9299 624 188 9299
Temp. control rela

y

Type G4F-11123T G4F-11123T G4F-11123T

Contact capacit

y

20A, 250VAC 20A, 250VAC 20A, 250VAC

Coil 12VDC 12VDC 12VDC

Parts code 624 173 2397 624 173 2397 624 173 2397
Switching power suppl

y

Type LDA10F-12 LDA10F-12 LDA10F-12

Rated output 12VDC, 0.9

A

12VDC, 0.9

A

12VDC, 0.9

A

Parts code 624 226 2053 624 226 2053 624 226 2053
Temperature sensor

Type SS-12-T SS-12-T SS-12-T

Rating 1000㱅 1000㱅 1000㱅

AT senso

r

Type 502AT 502AT 502AT

Rating 5K㱅, 25㷄 5K㱅, 25㷄 5K㱅, 25㷄

Filter sensor

Type 502AT 502AT 502AT

Rating 5K㱅, 25㷄 5K㱅, 25㷄 5K㱅, 25㷄

Cascade senso

r

Type 502AT 502AT 502AT

Rating 5K㱅, 25㷄 5K㱅, 25㷄 5K㱅, 25㷄

Door switch

Type SDKNA20700 SDKNA20700 SDKNA20700

Rating 5V, 5MA 5V, 5MA 5V, 5MA

Noise filte

r

Type ZAC2220-11 ZAC2220-11 ZAC2220-11

Rating 250VAC, 20

A

250VAC, 20

A

250VAC, 20

A

Power cord

Type GTVD-2,3 GTVD-2,3 GTVD-2,3

Battery switch

Type SLE6A2-5 SLE6A2-5 SLE6A2-5

Rating 250VAC, 4

A

250VAC, 4

A

250VAC, 4

A

Type 5HR-AAC 5HR-AAC 5HR-AAC

Rating 6V, 1100mAH 6V, 1100mAH 6V, 1100mAH

Parts code 624 209 9284 624 209 9284 624 209 9284
Handle heate

r

Rating 9VAC, 0.83W 9VAC, 0.83W 9VAC, 0.83W

Transformer

Type S41-RN97P

V

S41-RN97P

V

S41-RN97P

V

Primar

y

115V 115V 115V

Secondar

y

230V 230V 230V

Parts code 624 226 7645 624 226 7645 624 226 7645
Breaker switch

Type BAM215131 BAM215131 BAM215131

Rating 250V, 15A 250V, 15A 250V, 15A

Boost rela

y

Type G7L-1A-TUB

(MDF-U53VC only)

Rating 30A, 220V, DC24V

Power rela

y

Type DS1E-M-DC12V

(MDF-U53VC only)

Rating 12V, 0.4A, 125V

Breaker switch

Type IR11A2E201

R

(MDF-U53VC only)

Rating 250VAC, 20

A

Power transformer

Type ATR-HJ61TC-1

(MDF-U53VC only)

Rating 200, 225, 240V

Power transformer

Type ATR-D35003

(MDF-U53VC only)

Rating P;208V, S;230V

* For the compressor specified for China;
Type: KS370J1NS-4A (CCC authorized)

230/240VAC, 50Hz

220VAC, 50Hz

Battery

220VAC, 60Hz

MDF-U53V/U53VC

Electrical Parts

11

Specifications of sensor

The following shows the temperature in thermal sensor (502AT-1) and its resistance value.

Temp.

(C)

Resistance
Value (kΩ)

Temp.

(C)

Resistance
Value (kΩ)

Temp.

(C)

Resistance
Value (kΩ)

Temp.

(C)

Resistance
Value (kΩ)

−50

154.5

−36

71.80

−22

35.65 0 13.29

−49

145.9

−35

68.15

−21

33.99 5 10.80

−48

137.8

−34

64.71

−20

32.43 10 8.84

−47

130.2

−33

61.48

−19

30.92 15 7.20

−46

123.1

−32

58.43

−18

29.50 20 6.01

−45

116.5

−31

55.55

−17

28.14 25 5.00

−44

110.2

−30

52.84

−16

26.87 30 4.17

−43

104.4

−29

50.23

−15

25.65 35 3.50

−42

98.87

−28

47.77

−14

24.51 40 2.96

−41

93.70

−27

45.45

−13

23.42 45 2.51

−40

88.85

−26

43.26

−12

22.39 50 2.13

−39

84.18

−25

41.19

−11

21.41 55 1.82

−38

79.80

−24

39.24

−10

20.48 60 1.56

−37

75.67

−23

37.39

−5

16.43 65 1.35




The following shows the temperature in thermal sensor (PT1000ȍ) and its resistance value.

Temp.

(C)

Resistance

Value (Ω)

Temp.

(C)

Resistance

Value (Ω)

Temp.

(C)

Resistance

Value (Ω)

−140

450.83

−70

729.99 0 1000.0

−130

491.47

−60

769.02 10 1038.0

−120

531.83

−50

807.87 20 1076.0

−110

571.92

−40

846.58 30 1113.8

−100

611.76

−30

885.13 40 1151.4

−90

651.38

−20

923.55 50 1189.0

−80

690.78

−10

961.84 60 1226.4

12



Connections on PCB



The following shows the connections of connectors on the Temp. controller PCB.

Connector Connects to Usage

CN1 Switching power supply To supply the power to PCB.

CN2 Network interface To connect to MTR-480（option）

CN3

Remote alarm terminal

#1: COM.

#2: N.O.

#3: N.C.

Remote alarm contact outputs.

In normal condition, open for #1-#2 and

closed for #1-#3.

CN4

#1-#2：Temp. control relay

#3-#4：Heater relay

To control internal temperature (12VDC)

To supply the power to Cap. tube heater

(12VDC)

CN5

#1-#5: Switch PCB

#6-#7: Buzzer

To connect to each switch

CN6 Display PCB To connect to each LED

CN7

#1-#2: Door switch

#5-#6: AT sensor

#7-#8: Filter sensor

#9-#10: Cascade sensor

To control the door switch

To detect the ambient temperature

To detect the temperature in condenser outlet pipe.

To detect the temperature in cascade.

CN8

#1-#2: Battery

（#1:6V #2:Battery switch）

#3-#4: Transformer

To supply the power during power failure

To supply the power to PCB.

CN9 #1-#2: H. Comp. relay To control compressor H ON/OFF (12VDC)

CN10 Unused

CN11 #1-#3: Temp. sensor To detect the internal temperature.

13

㩷 Wiring Diagram 㩷

14

15

㩷 Circuit Diagram 㩷

16

㩷 Control specification

1. 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 the
present temperature of PT sensor.

ALARM TEST : With this key pressed to activate alarm test mode to be forcibly step into

alarm condition (ALARM lamp blinks, intermittent buzzer beeps, digital LED
goes off and remote alarm inputs).
After approx. 90seconds then, normal condition retrieves with Auto Return
function.
With the battery switch turns off, “E09” blinks on the display.

SET : Press this key once to activate set mode (2

nd

digit in LED blinks), press the
key again to store the value to be changed.
With Key Lock setting mode (“L 0” or “L 1” is displayed), press the key to
store the value to be changed.

STATUS : During STATUS lamp is lit, press this key to display status code among ‘- -

1’, ‘- - 2’ and ‘- - 3’.

During setting mode, the blinking digit shifts among the 1

st

digit or the 2nd

digit or 3

rd

digit.

During setting mode, count the blinking digit up. In PV display, press the

key over 5 seconds to enter the function mode. (“F00” is displayed)

2. Temperature control

Setting range :

-50㷄~-90㷄

Display range :

-180㷄~+50㷄

Setting procedure : Press SET key and set the required value with key and key.

Press SET key to store the set value.

Out of setting range : If you try to set the value which is out of temperature setting range, it is

unacceptable with buzzer beeps for 1second.

3. Temperature alarm

Setting range :

High temperature alarm … +5㷄~+20㷄 (Initial setting: 10㷄)
Low temperature alarm …. -5㷄~-20㷄 (initial setting: -10㷄)

Setting procedure : Keep pressing key over 5 seconds to enter function mode (F00).

Input “F01” for high temperature alarm or “F02” for low temperature
alarm. Press SET key to set the value to be changed with the 1

st

digit
blinks. Press SET key again to store the value in the non-volatile
memory.

Out of setting range : If you try to set the value which is out of alarm setting range, it is

unacceptable with buzzer beeps for 1 second.

4. Key Lock mode and Function mode

A) Key Lock mode
Setting range : 0, 1
Setting procedure: In PV display, keep pressing key over 5 seconds to enter into Key

Lock mode. (“L_0” or “L_1” is displayed. initial: L_0) with “0” or “1” blinks.
Change the value with key and press SET key to store the value in
the non-volatile memory.

17

B) Function mode
Setting range : 00~32
Display range : 00~39
00, 16 and 33~39 are unavailable.
Setting procedure : In PV display, keep pressing key over 5 seconds to enter function

mode (F00 is displayed). Change the blinking 1

st

digit to desired function
code with key and key. Press SET key to be function code
available.
If you input 00 and 16 then press SET key, automatically revert to PV
display.

Out of setting range : If you try to input F33~F39, it is unacceptable to change with

automatically revert to PV display.

5. Warning function
Door alarm : Leave the outer door open and DP54 (red lamp) is lit. Buzzer beeps

intermittently after 1~15 min. (Door alarm setting time) has passed. Initial
setting time is 2 min. Buzzer does not activate simultaneously with
remote alarm terminal output. Once press BUZZER key to stop buzzer
beeping, buzzer does not beep again unless alarming condition get
backs.

High temp. alarm : When PV is reached at SV+SV

H

(high temp. alarm SV) +1 or higher,
ALARM lamp and LED display blinks, intermittent buzzer beeps with
approx. 15 minutes of delay and remote alarm output turns on.
When PV is reached at SV+ SV

H

or lower, ALARM lamp and LED display
go off, buzzer stops beeping and remote alarm output turns off.
If you press BUZZER key, the buzzer stops beeping instead remote
alarm output does not turn off.

Low temp. alarm : When PV is reached at SV-SV

L

(low temp. alarm SV) -1 or lower, ALARM
lamp and LED display blinks, intermittent buzzer beeps with approx. 15
minutes of delay and remote alarm output turns on.
When PV is reached at SV- SV

L

or lower, ALARM lamp and LED display
go off, buzzer stops beeping and remote alarm output turns off.
If you press BUZZER key, the buzzer stops beeping instead remote
alarm output does not turn off.

Filter blockage :

With the filter sensor temperature is reached at 48.0㷄 or higher, FILTER
lamp is lit with buzzer beeps intermittently.
With the filter sensor temperature is reached at 43.0㷄 or lower, FILTER
lamp goes off and buzzer stops beeping.

6. Other function

Cascade control : Compressor (L) is allowed to turn on when the cascade sensor

temperature is reached at -34.1㷄 or lower during pull-down.

Compressor (L) is allowed to turn off when the cascade sensor
temperature is reached at -12.0㷄 or higher during pull-up.

Auto Return : If there is not any key operation for 90 seconds in each setting mode,

Key Lock mode and Function mode, automatically reverts to PV mode.

Note) Auto Return is not worked in F09 and F10.

Sensor temperature : F12: Temperature of temp. sensor is displayed

(Ex. -80.2㷄㩷 㸢㩷 displayed as ‘80.2’)
F13: Temperature of cascade sensor is displayed.
(Ex. -34㷄㩷 㸢㩷 displayed as ‘-34㷄’)
F14: Temperature of filter sensor is displayed.
(Ex. 67㷄㩷 㸢㩷 displayed as ‘067’)
F15: Temperature of AT sensor is displayed.
(Ex. 30㷄㩷 㸢㩷 displayed as ‘030’)

18

Battery accumulating

time :

F03: Battery accumulating time is displayed.

(Ex. 2years and 6months consumed 㸢㩷 displayed as ‘02.5’)
The display shows ’02.8’ to inform the battery exhaustion.

Replace with new battery.

<Reset of accumulating time>

Step into F06. Input ‘409’ and press SET key to turn the display
to ’00.0’ with BATTERY lamp goes off.

Condensing fan

motor accumulating
time :

F32: Condensing fan motor accumulating time is displayed.
(Ex. 5years and 6months consumed 㸢 displayed as ’05.5’)
<Reset of accumulating time>
Step into F06. Input ‘419’ and press SET key to turn the display

to ’00.0’ with DP55 lamp goes off.

Note) Notice of condensing fan motor accumulating time is prior to

notice of battery accumulating time.

ROM version :

F30: ROM version is displayed (Ex. Ver. 1.00 㸢㩷 displayed as “1.00”)

Monitor of status : DP52 (orange lamp) is lit in the following status;

Status 1; When the ambient temperature is over 35.0C or lower than

0C. Press STATUS key once to display ‘- - 1’.

Status 2; When the power source voltage is less than 2.01 VDC

between TP7 and TP3. Press STATUS key once to display
‘- - 2’,

Status 3; When running rate of refrigerating circuit is higher than

usual.
When diagnose value of running rate is 95% or higher, the display
shows ‘- - 3’.

Display on temperature indicator:
Status code displayed is changed every few seconds if two or three
status shown at the same time.
order: (‘- - 1’ 㸢 ‘- - 2’ 㸢㩷 ‘- - 3’ 㸢 ‘- - 1’ …… )

7. Function mode

F00 Automatically revert to PV display
F01 SV

H

(high temp. alarm SV) setting

F02 SV

L

(low temp. alarm SV) setting
F03 Battery accumulating time display
F04 Door alarm delay time setting
F05 Compressor (H)/(L) delay time setting
F06 Service code input (code: 384)
F07 * Temperature Zero Adjustment
F08 * Cascade sensor Zero Adjustment
F09 Factory test mode …… Unavailable
F10 Factory test mode …… Unavailable
F11 Factory test mode …… Unavailable
F12 * Display of temperature of temp. sensor
F13 * Display of temperature of cascade sensor
F14 * Display of temperature of filter sensor
F15 * Display of temperature of AT sensor
F16 Automatically revert to PV display
F17 * Model code setting (Initialization of non-volatile ROM and memory)
F18 * Capillary heater is forcibly turned on/off
F19 Factory test mode …… Unavailable
F20 * Setting for Diagnose value of running rate …… Unavailable
F21 Communication ID set
F22 Communication mode set
F23 * Display of power supply voltage
F24 Remote alarm terminal output
F25 Ring-back time set

19

F26 * Display of actual operation rate
F27 * Display of calculated running rate
F28 * Display of delay time of permission for measuring running rate (2 hrs timer)
F29 * Display of delay time of permission for measuring running rate (8 hrs timer)
F30 * ROM version is displayed
F31 * Filter alarm
F32 Display of condensing fan motor accumulating time
F33~F39 Unused
Setting

procedure:

In PV display, keep pressing key over 5seconds to display “F00”.
Input the desired function code with key and key.
Press SET key to be function mode available.
* … You should input service code in F06 beforehand.
To cancel service code, input “000” in F06 or turn the power off.

F00: <Purpose> Simply passing through if entered by mistake.
<Operation> Press SET key in “F00” displayed to revert to PV display.

F01: <Purpose> SV

H

(high temp. alarm SV) setting

<Operation> Input F01 and press SET key to display “010” (initial value).

Set the value in the range “005”~“020” with key. Press SET key
to store the value and revert to PV display.

F02: <Purpose> SV

L

(low temp. alarm SV) setting

<Operation> Input F02 and press SET key to display “-10” (initial value).

Set the value in the range “-05”~“-20” with key. Press SET key to
store the value and revert to PV display.

F03: <Purpose> Battery accumulating time is displayed
<Operation> Input F03 and press SET key to display alternately F03 with “00.0”

(in case battery used for a month or less). Press SET key to revert to
PV display.

F04: <Purpose> Door alarm delay time is set
<Operation> Press SET key in “F04” displayed to display ‘002’ (initial setting).

Change your desired value among ‘001’~’015’ with key and
key and press SET key to store the value and revert to PV
display.

F05: <Purpose> Compressor (H) / (L) is turned on with forcibly delayed (by minute

increment) when the power retrieves from the power failure.

<Operation> Input “F05” and press SET key to display “002” (initial).

Change the value in the range “002”~”015” with key and key.
Press SET key to store the value and revert to PV display.

F06: <Purpose> Dividing F-code for customer used from service
<Operation> Input F06 and press SET key to display “000” (initial value).

Set to “384” with key and key. Press SET key to store the
value and revert to PV display.

<Cancel> Input F06 and press SET key to display “384”.

Change to “000” with key and key. Press SET key to store
the value and revert to PV display.
Turn the power off then on to revert to “000”. (not stored in
non-volatile memory)
Note) “384” is storied in non-volatile memory during battery back-up.

(battery SW is ON)

F07: <Purpose> To match temperature of temp. sensor with temperature of center at

the chamber.

<Operation> Input service code in F06 prior to use this mode.

Input F07 and press SET key to display “00.0” (initial value).

20

Change to the desired value in the range “-4.9”~”04.9” with key
and key.

Press SET key to store the value and revert to PV display.

F08: <Purpose> To calibrate temperature of cascade sensor
<Operation> Input service code in F06 prior to use this mode.

Input F08 and press SET key to display “00.0” (initial value).

Change to the desire value in the range “-9.9”~”09.9” with key

and key.

Press SET key to store the value and revert to PV display.

F12: <Purpose> To display the temperature of temp. sensor
<Operation> Input service code in F06 prior to use this mode.

Input F12 and press SET key to display alternately F12 and “XX.X”

(present internal temperature). Press SET key to revert to PV

display. 3 digits indication. Minus “-“ is not indicated.

Ex) “-85.5㷄” 㸢㩷 indicated as “85.5”

F13: <Purpose> To display the temperature of cascade sensor
<Operation> Input service code in F06 prior to use this mode.

Input F13 and press SET key to display alternately F13 and “XX.X”

(present temperature of cascade sensor). Press SET key to revert to

PV display.

F14: <Purpose> To display the temperature of filter sensor
<Operation> Input service code in F06 prior to use this mode.

Input F14 and press SET key to display alternately F14 and “XX.X”

(present temperature of filter sensor). Press SET key to revert to PV

display.

F15: <Purpose> To display the temperature of AT sensor
<Operation> Input service code in F06 prior to use this mode.

Input F15 and press SET key to display alternately F15 and “XX.X”

(present temperature of AT sensor). Press SET key to revert to PV

display.

F16: <Purpose> Simply passing through if entered by mistake.
<Operation> Press SET key in “F16” displayed to revert to PV display.

F17: <Purpose> Non-volatile memory initialization, model code change
<Operation> Service code should be input in F06 prior to use this mode.

Input F17 and press SET key to display “001”. Change the value

with key and key. Press SET key to store and revert to PV

display.

Model code ‘007’: MDF-U53V/U53VC

F18: <Purpose> To turn capillary heater forcibly on (or off)
<Operation> Service code should be input in F06 prior to use this mode.

Input F18 and Press SET key to display “000” (initial).

Change to desire value “000” or “001” with key and key.

Press SET key to store the value and revert to PV display.

000: Capillary heater is turned on to off, or turned off to on

001: Capillary heater is forcibly turned off

F21: <Purpose> 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: <Purpose> Serial communication mode setting
<Operation> input F22 and press SET key to display “000” (initial value)

Change the value with key and key.

21

Press SET key to store the value and revert to PV display.

Control mode (the 3

rd

digit)
0: Local (initial)
1: Remote
Baud rate (the 2

nd

digit)
0: 2400bps (initial)
1: 4800bps
2: 9600bps
Note) You cannot be changed SV if control mode is set in “Remote”.

F23: <Purpose> To display the power supply voltage (Unit: %)
<Operation> Service code should be input in F06 prior to use this mode.

Input F23 and press SET key to display F23 and ‘xxx’ (present
power supply voltage) alternately. Press SET key to revert to PV
display.

F24: <Purpose> To control remote alarm output
<Operation> Input F24 and Press SET key to display “000” (initial).

Change to the desired value with key and key.
Press SET key to store the value and revert to PV display.
000: Remote alarm is outputted simultaneously with buzzer
001: Remote alarm is not outputted simultaneously with buzzer

F25: <Purpose> Alarm auto recovery time setting
<Operation> Input F25 and press SET key to display “030” (initial).

Change to the desired value with key and key.
Press SET key to store the value and revert to PV display.

000: Auto recovery OFF
010: Recovers after 10min. passed
020: Recovers after 20min. passed
030: Recovers after 30min. passed
(initial)

040: Recovers after 40min. passed
050: Recovers after 50min. passed
060: Recovers after 60min. passed

F26: <Purpose> Actual running rate is displayed (unit: %)
<Operation> Service code should be input in F06 prior to use this mode.

Input F26 and press SET key to display alternately F26 with “XXX”
(present actual running rate).
Press SET key to revert to PV display.

F27: <Purpose> Calculated running rate is displayed
<Operation> Service code should be input in F06 prior to use this mode.

Input F27 and press SET key to display alternately F27 with “XXX”
(present calculated running rate).
Press SET key to revert to PV display.

F28: <Purpose> To display delay time of permission of measuring running rate

(2hrs timer; 000~120 min)

<Operation> Service code should be input in F06 prior to use this mode.

Input F28 and press SET key to display F28 and ‘xxx’ (present count
value) alternately. Press SET key to revert to PV.

F29: <Purpose> To display delay time of permission of measuring running rate

(8hrs timer; 000~480 min)

<Operation> Service code should be input in F06 prior to use this mode.

Input F29 and press SET key to display F29 and ‘xxx’ (present count
value) alternately. Press SET key to revert to PV.

F30: <Purpose> 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 PV display.

22

F31: <Purpose> Buzzer setting during filter alarm
<Operation> Input F31 and press SET key to display “001” (initial).

Change to the desired value with key and key.
Press SET key to revert to PV display.
000: Buzzer off
001: Buzzer on

F32: <Purpose> To display accumulation time of condensing fan motor
<Operation> Input F32 and press SET key to display F32 and ‘xx.x’ (accumulation

time) alternately. Press SET key to revert to PV display.

8. Differential (The point of compressor ON and OFF )

COMP ON:

COMP OFF:

SV +0.4㷄
SV -2.2㷄 (for SV is -90㷄~-60㷄), SV -0.5 (for SV is -59㷄~-50㷄)

9. Offset value

1) PV+0.5㷄 is the offset value to adjust the difference between temperature of temp. sensor

and the center of internal chamber.

2) PVat + (-3.0C) is the offset value to correct the ambient temperature.
*Note) PVat = Temperature of AT sensor

10. Remote alarm terminal

In normal condition:

㸣

In alarm condition &
power failure :

Remote alarm contact is N.O. N.C.

㸣

Remote alarm contact is N.C. N.O.

11. Cycling of High stage compressor

If the filter sensor is higher than or equal to 60㷄, the High stage compressor will be turned off.
When the filter sensor is within 10㷄 of the ambient temperature sensor, the High stage
compressor will be allowed to turn back on.

12. Sensor failure
(1) Temp. sensor
Open circuit:

E01 and 50㷄 are displayed alternately, the buzzer beeps intermittently
and remote alarm contact outputs.
The compressor would be allowed to turn on.
Press BUZZER key to stop the buzzer beeping.

Short circuit:

E02 and -170㷄>PV>-180㷄 are displayed alternately, the buzzer beeps
intermittently and remote alarm contact outputs.
The compressor would be allowed to turn on.
Press BUZZER key to stop the buzzer beeping.

(2) Cascade sensor
Open circuited: E03 and PV are displayed alternately, the buzzer beeps intermittently

and remote alarm contact outputs.
The resistance value would be 㺙㱅 and temperature would be -34.1㷄
or lower. Compressor (L) is not forcibly turned off.
Press BUZZER key to stop the buzzer beeping.

Short circuited: E04 and PV are displayed alternately, the buzzer beeps intermittently

and remote alarm contact outputs.
Press BUZZER key to stop the buzzer beeping.
The resistance value would be 0㱅 and temperature would be -12㷄 or
higher that causes to be compressor (L) failure. Compressor (L) is
forcibly turned off.

23

(3) Filter sensor
Open circuited: E05 and PV are displayed alternately, the buzzer beeps intermittently

and remote alarm contact outputs.
Press BUZZER key to stop the buzzer beeping.

Short circuited: E06 and PV are displayed alternately, the buzzer beeps intermittently

and remote alarm contact outputs.
Press BUZZER key to stop the buzzer beeping.

(4) AT sensor
Open circuited: E07 and PV are displayed alternately, the buzzer beeps intermittently

and remote alarm contact outputs.
Press BUZZER key to stop the buzzer beeping.

Short circuited: E08 and PV are displayed alternately, the buzzer beeps intermittently

and remote alarm contact outputs.
Press BUZZER key to stop the buzzer beeping.

(5) Abnormal

condenser temp.

E10 and PV are displayed alternately, the buzzer beeps intermittently
and remote alarm contact outputs.
Press BUZZER key to stop the buzzer beeping.
When E10 is shown on the display, the compressor (H) is forcibly turned

off. When E10 is not shown, the compressor (H) is permitted to turn on.
(6) Error code priority
No.1: Temp. sensor failure (E01 or E02)
No.2: Cascade sensor failure (E03 or E04)
No.3: Filter sensor failure (E05 or E06)
No.4:

No.5:

AT sensor failure (E07 or E08)

Abnormal condenser temperature (E10)
(7) Standard to judge sensor failure
PT sensor:

49.9㷄 or higher with E01 displayed (open circuited)

-170㷄 or lower with E02 displayed (short circuited)

Cascade sensor:

-60㷄 or lower with E03 displayed (open circuited)

60㷄 or higher with E04 displayed (short circuited)
Filter sensor:

-60㷄 or lower with E05 displayed (open circuited)

130㷄 or higher with E06 displayed (short circuited)
AT sensor:

-60㷄 or lower with E07 displayed (open circuited)

60㷄 or higher with E08 displayed (short circuited)

Filter sensor: 60㷄 or higher with E10 displayed

13. Cycle to turn capillary heater on

Cycle: Every 18 hours
Period to turn on: 8 minutes (For factory use, unnecessary to change)

Capillary heater is permitted to turn on after 9seconds later since

compressor L was switched to turn off.

With the compressor L keeps turning on for 60minutes, the compressor L

turns off after 1minute passed then and capillary heater is forcibly turned

on.

14. When the power is supplied (without battery)

Compressor H: Compressor H turns on with 2minutes (initial value) of delay after the

power was supplied. Compressor H runs with regardless of PV.
Compressor L:

In PV䋾SV (when the cascade sensor temperature is -34.1㷄 or lower),

compressor L turns on with 2minutes (initial value) of delay after the

power was supplied.

In PV䋾SV (when the cascade sensor temperature is -34.0㷄 or higher),

compressor L turns on with 2minutes (initial value) of delay after the

power was supplied and cascade temperature is reached at -34.1㷄.

*Note) Delay time of both compressor H and L cannot be set individually.

Setting data: The setting data initialized in F17 is retrieved in non-volatile memory.

24

15. Other specifications

(1) Lamp specifications:
<Control PCB>
DP1: Orange lamp

Goes off: High/low temp. alarm, sensor failure, power failure
Lit : Not in alert condition

DP2: Green lamp

Goes off: Compressor L turns off. (normal condition)
Lit : Compressor L turns on.

DP3: Red lamp

Goes off: Capillary heater turns off. (normal condition)
Lit : Capillary heater turns on.

DP4: Yellow lamp

Goes off: Inoperative
Lit: Inoperative

DP6: Green lamp

Goes off: Compressor H turns off. (normal condition)

Lit : Compressor H turns on.
<Display PCB>
DP51: Red lamp

Goes off: Not in alarm condition (normal condition)

Blinks : High/low temp. alarm (without delay), or sensor failure,

or power failure

DP52: Orange lamp

Goes off: Inoperative

Lit : Inoperative

Blinks : In F11 performed
DP53: Orange lamp

Goes off: Not in filter alarm (normal condition)

Lit : In filter alarm

Blinks : In F11 performed
DP54: Red lamp

Goes off: Inoperative

Lit : Inoperative

Blinks : In F11 performed
DP55: Orange lamp

Goes off: Length of battery used is 2.8yrs or less (normal condition)

Fan motor accumulation time is less than 5.6yrs

Lit : Length of battery used is 2.8yrs or over

Blinks : In F11 performed

Fan motor accumulation time is equal or more than 5.6yrs
DP56: Green lamp

Goes off: Inoperative

Lit : Inoperative

Blinks : In F11 performed

(2) Buzzer specifications:
High/low temp. alarm: Intermittent tone emitted with delay
Sensor failure: Intermittent tone emitted when EXX (XX=01~08) displayed
Power failure: Intermittent tone emitted with DPA1 and DPA2 go off
Key quick: Short tone emitted if available
Input out of range: 1second continuous tone emitted
Filter alarm: Intermittent tone emitted with DP53 lit (in F31:001, initial setting)
Compressor abnormal

warming up :

Intermittent tone emitted with E10 displayed

25

Control panel

Latch 'O

p

en'

Inner door handle

Boost BOX

(

MDF-U53VC onl

y)

Power transformer

(

MDF-U53VC onl

y)

Parts layout

Door latch

Handle

Fan motor

Filter sensor

26

<Grille> Filte

r

A

T sensor

Power switch

<Electrical BOX>

Remote alarm

Main PCB

Switchin

g p

ower suppl

y

Running capacitor H

Startin

g

capacitor H

Runnin

g

capacitor L Starting capacitor L

12P terminal

27

Test data

㪤㪛㪝㪄㪬㪌㪊㪭㩷㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㩷㪺㪿㪸㫉㪸㪺㫋㪼㫉㫀㫊㫋㫀㪺㫊

㪄㪈㪇㪇

㪄㪏㪇

㪄㪍㪇

㪄㪋㪇

㪄㪉㪇

㪇

㪉㪇

㪋㪇

㪇 㪌 㪈㪇 㪈㪌

䌔䌩䌭䌥䋨䌨䌯䌵䌲䋩

㪫㪼㫄㫄㫇㪼㫉㪸㫋㫌㫉㪼㩿㷄㪀

㪧㫌㫃㫃㪄㪛㫆㫎㫅
㪧㫌㫃㫃㪄㪬㫇
㪘㪫

㪤㪛㪝㪄㪬㪌㪊㪭㩷㪟㪆㪣㩷㪜㪭㪘㩷㪦㪬㪫㩷㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㩷㫀㫅㩷㫇㫌㫃㫃

㪄㪈㪇㪇

㪄㪏㪇

㪄㪍㪇

㪄㪋㪇

㪄㪉㪇

㪇

㪉㪇

㪋㪇

㪇 㪌 㪈㪇 㪈㪌

㪫㫀㫄㪼㩿㪿㫆㫌㫉㪀

㪫㪼㫄㫇㪼㫉㪸㫋㫌㫉㪼㩿㷄㪀

㪟㪜㪭㪘㪦㪬㪫
䌌㪜㪭㪘㪦㪬㪫
㪧㫌㫃㫃㪄㪛㫆㫎㫅
㪘㪫

㪘㪫

㪧㫌㫃㫃㪄㪬㫇

㪧㫌㫃㫃㪄㪛㫆㫎㫅

㪘㪫

㪟㩷㪜㪭㪘㩷㪦㪬㪫

㪣㩷㪜㪭㪘㩷㪦㪬㪫

㪧㫌㫃㫃㪄㪛㫆㫎㫅

28

㪤㪛㪝㪄㪬㪌㪊㪭㩷㪬㫅㫀㫋㩷㫇㫉㪼㫊㫊㫌㫉㪼

㪇㪅㪇

㪇㪅㪌

㪈㪅㪇

㪈㪅㪌

㪉㪅㪇

㪉㪅㪌

㪇㪊㪍㪐㪈㪉㪈㪌

㪫㫀㫄㪼㩿㪿㫆㫌㫉㪀

㪧㫉㪼㫊㫊㫌㫉㪼㩿㪤㪧㪸㪀

㪍㪇㪟㫑㪃㪘㪫㪊㪌㷄

㪤㪛㪝㪄㪬㪌㪊㪭㩷㪧㫆㫎㪼㫉㩷㪺㫆㫅㫊㫌㫄㫇㫋㫀㫆㫅

㪇㪅㪇

㪈㪅㪇

㪉㪅㪇

㪊㪅㪇

㪋㪅㪇

㪌㪅㪇

㪍㪅㪇

㪎㪅㪇

㪏㪅㪇

㪇㪊㪍㪐㪈㪉㪈㪌

㪫㫀㫄㪼㩿㪿㫆㫌㫉㪀

㪚㫌㫉㫉㪼㫅㫋㩿㪘㪀

㪇㪅㪇

㪇㪅㪌

㪈㪅㪇

㪈㪅㪌

㪉㪅㪇

㪉㪅㪌

㪊㪅㪇

㪧㫆㫎㪼㫉㩷㪺㫆㫅㫊㫌㫄㫇㫋㫀㫆㫅㩷㩿㫂㪮㪀

㫂㪮

㪟㪄㫇㪻

㪣㪄㫇㪻

㪟㪄㫇㫊

㪣㪄㫇㫊

29

Temperature Uniformity 䊶 䊶 䊶 MDF-U53V

䌾Reference䌾

Condition: SV-80㷄

A

T30㷄

Load: No load
Measuring point: Center

䋪䋺1/2䌈䌡䌩䌲

㪄㪎㪐㪅㪉㷄

㪄㪏㪇㪅㪎㷄

㪁㪄㪎㪐㪅㪐㷄

㪄㪎㪎㪅㪉㷄

㪄㪎㪍㪅㪊㷄

30

<Sample load test>

Test conditions: 500ml water x 60 bottles (30L in total)
Measuring point: a, b, c and d as figure shows

Bottom: 500ml x 15bottles

Lower: 500ml x 15bottles

Middle: 500ml x 15bottles

Upper: 500ml x 15bottles

(Front view)

500ml x 60bottles (30L in total)

䌡

䌢

㪺

䌤

㪤㪛㪝㪄㪬㪌㪊㪭㩷㪪㪸㫄㫇㫃㪼㩷㫃㫆㪸㪻㩷㫋㪼㫊㫋㩷䋨㪪㪭㪄㪏㪇㪀

㪄㪐㪇

㪄㪎㪇

㪄㪌㪇

㪄㪊㪇

㪄㪈㪇

㪈㪇

㪊㪇

㪇 㪍 㪈㪉 㪈㪏 㪉㪋 㪊㪇 㪊㪍

䌔䌩䌭䌥䋨䌨䌲䋩

䌴䌥䌭䌰䋨㷄䋩

㪟㪜㫍㪸㩷䌯䌵䌴

䌌㪜㫍㪸㩷䌯䌵䌴

㪣䌯䌡䌤䇭䌡

㪣䌯䌡䌤䇭䌢

㪣䌯䌡䌤䇭䌣

㪣䌯䌡䌤䇭䌤

31

MDF-U53V䇭Temperature after the unit reaches at -80㷄

㪄㪐㪇

㪄㪏㪇

㪄㪎㪇

㪄㪍㪇

㪄㪌㪇

㪄㪋㪇

㪄㪊㪇

㪄㪉㪇

㪇 㪍㪇 㪈㪉㪇 㪈㪏㪇 㪉㪋㪇 㪊㪇㪇 㪊㪍㪇

time(min)

㪫㪼㫄㫇㪅䋨㷄䋩

䌬䌯䌡䌤 䌤

䌬䌯䌡䌤 䌡

䌬䌯䌡䌤 䌢

䌬䌯䌡䌤 䌣

Leva out

Heva out

㪤㪛㪝㪄㪬㪌㪊㪭 Sample load test (SV-50)

㪄㪐㪇

㪄㪏㪇

㪄㪎㪇

㪄㪍㪇

㪄㪌㪇

㪄㪋㪇

㪄㪊㪇

㪄㪉㪇

㪇㪉㪋㪍㪏㪈㪇

䌔䌩䌭䌥䋨䌨䌲䋩

㫋㪼㫄㫇䋨㷄䋩

Heva out

Leva out

䌬䌯䌡䌤 䌡

䌬䌯䌡䌤 䌤

䌬䌯䌡䌤 䌣

䌬䌯䌡䌤 䌢

32

Instruction manual

x This section is extracted and printed from Instruction Manual.

x If you find out “Refer to page

ƔƔ

” in them, this page means not page in Service manual

but page in the lower corner of each page in the extract from Instruction manual.

This page number is not corresponded with serial number in Service manual.

33

MDF-U73V
MDF-U73VC
MDF-U53V
MDF-U53VC

Ultra-Low Temperature Freezer

INSTRUCTION MANUAL

MDF-U73V/MDF-U73VC

34

1

CONTENTS

INTRODUCTION P. 2

PRECAUTIONS FOR SAFE OPERATION P. 3

ENVIRONMENTAL CONDITIONS P. 7

FREEZER COMPONENTS P. 8

Control panel P.10

INSTALLATION SITE P.11

INSTALLATION P.12

START-UP OF UNIT P.13

CHAMBER TEMPERATURE SETTING P.14

KEY LOCK FUNCTION P.14

ALARM TEMPERATURE SETTING P.15

SETTING OF ALARM RESUME TIME P.16

REMOTE ALARM TERMINAL P.17

MONITOR OF FREEZER STATUS P.18

CHANGE OF COMPRESSOR DELAY TIME P.19

CHANGE OF DOOR ALARM DELAY TIME P.20

ALARMS & SAFETY FUNCTIONS P.21

ROUTINE MAINTENANCE

Cleaning of cabinet P.22

Cleaning of condenser filter P.22

Defrosting of inside wall P.23

TROUBLESHOOTING P.24

REPLACEMENT OF BATTERY P.25

DISPOSAL OF UNIT P.26

Recycle of battery P.26

TEMPERATURE RECORDER (OPTION) P.31

BACK-UP SYSTEM (OPTION) P.32

INVENTORY RACK (OPTION) P.33

SPECIFICATIONS P.34

PERFORMANCE P.36

SAFETY CHECK SHEET P.37

35

2

INTRODUCTION

Ŷ Read this manual carefully before using the appliance and follow the instructions for safety operation.

Ŷ Sanyo never guarantee any safety if the appliance is used for any objects other than intended use or

used by any procedures other than those mentioned in this manual.

Ŷ Keep this manual in an adequate place to refer to it as necessary.

Ŷ The contents of the manual will be subjected to change without notice due to the improvement of

performance or functions.

Ŷ Contact Sanyo sales representative or agent if any page of the manual is lost or page order is incorrect.

Ŷ Contact Sanyo sales representative or agent if any point in this manual is unclear or if there are any

inaccuracies.

Ŷ No part of this manual may be reproduced in any form without the expressed written permission of
Sanyo.

36

3

PRECAUTIONS FOR SAFE OPERATION

It is imperative that the user complies with this manual as it contains
important safety advice.

Items and procedures are described so that you can use this unit correctly and safely.
If the precautions advised are followed, this will prevent possible injury to the user and
any other person.

Precautions are illustrated in the following way:

WARNING

Failure to observe WARNING signs could result in a hazard to personnel
possibly resulting in serious injury or death.

CAUTION

Failure to observe CAUTION signs could result in injury to personnel and
damage to the unit and associated property.

Symbol shows;

㩷

this symbol means caution.

㩷

this symbol means an action is prohibited.

㩷

this symbol means an instruction must be followed.

Be sure to keep this manual in a place accessible to users of this unit.

< Label on the unit >

This mark is labeled on the cover in which the electrical components of high voltage
are enclosed to prevent the electric shock.
The cover should be removed by a qualified engineer or a service personnel only.

WARNING

As with any equipment that uses CO2 gas, there is a likelihood of oxygen depletion in the vicinity
of the equipment. It is important that you assess the work site to ensure there is suitable and
sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a
safe environment must be considered. These may include atmosphere monitoring and warning
devices.

37

4

PRECAUTIONS FOR SAFE OPERATION

Do not use the unit outdoors. Current leakage or electric shock may result if the unit is exposed to

rain water.

Only qualified engineers or service personnel should install the unit. The installation by
unqualified personnel may cause electric shock or fire.

Install the unit on a sturdy floor and take an adequate precaution to prevent the unit from
turning over. If the floor is not strong enough or the installation site is not adequate, this may result

in injury from the unit falling or tipping over.

Never install the unit in a humid place or a place where it is likely to be splashed by water.
Deterioration of the insulation may result which could cause current leakage or electric shock.

Never install the unit in a flammable or volatile location. This may cause explosion or fire.

Never install the unit where acid or corrosive gases are present as current leakage or electric

shock may result due to corrosion.

Always ground (earth) the unit to prevent electric shock. If the power supply outlet is not
grounded, it will be necessary to install a ground by qualified engineers.

Never ground the unit through a gas pipe, water main, telephone line or lightning rod. Such
grounding may cause electric shock in the case of an incomplete circuit.

Connect the unit to a power source as indicated on the rating label attached to the unit. Use
of any other voltage or frequency other than that on the rating label may cause fire or electric shock.

Never store volatile or flammable substances in this unit if the container cannot be sealed. These
may cause explosion or fire.

Do not insert metal objects such as a pin or a wire into any vent, gap or any outlet on the unit.
This may cause electric shock or injury by accidental contact with moving parts.

Use this unit in safe area when treating the poison, harmful or radiate articles. Improper use
may cause bad effect on your health or environment.

Turn off the power switch (if provided) and disconnect the power supply to the unit prior to
any repair or maintenance of the unit in order to prevent electric shock or injury.

Do not touch any electrical parts (such as power supply plug) or operate switches with a wet
hand. This may cause electric shock.

WARNING

38

5

PRECAUTIONS FOR SAFE OPERATION

Ensure you do not inhale or consume medication or aerosols from around the unit at the time of

maintenance. These may be harmful to your health.

Never splash water directly onto the unit as this may cause electric shock or short circuit.

Never put containers with liquid on the unit as this may cause electric shock or short circuit when
the liquid is spilled.

Never bind, process, or step on the power supply cord, or never damage or break the power
supply plug. A broken supply cord or plug may cause fire or electric shock.

Do not use the supply cord if its plug is loose. Such supply cord may cause fire or electric shock.

Never disassemble, repair, or modify the unit yourself. Any such work carried out by an

unauthorized person may result in fire, or electric shock or injury due to a malfunction.

Disconnect the power supply plug if there is something wrong with the unit. Continued
abnormal operation may cause electric shock or fire.

When removing the plug from the power supply outlet, grip the power supply plug, not the cord.
Pulling the cord may result in electric shock or fire by short circuit.

Disconnect the power supply plug before moving the unit. Take care not to damage the power
cord. A damaged cord may cause electric shock or fire.

Disconnect the power plug when the unit is not used for long periods. Keeping the connection
may cause electric shock, current leakage, or fire due to the deterioration of insulation.

If the unit is to be stored unused in an unsupervised area for an extended period, ensure that

children do not have access and that doors cannot be closed completely.

The disposal of the unit should be accomplished by appropriate personnel. Remove doors to

prevent accidents such as suffocation.

Do not put the packing plastic bag within reach of children as suffocation may result.

WARNING

39

6

PRECAUTIONS FOR SAFE OPERATION

Use a dedicated power source (a dedicated circuit with a breaker) as indicated on the rating label

attached to the unit. A branched circuit may cause fire resulting from abnormal heating.

Connect the power supply plug to the power source firmly after removing the dust on the plug.
A dusty plug or improper insertion may cause a heat or ignition.

Never store corrosive substances such as acid or alkali in this unit if the container cannot be
sealed. These may cause corrosion of inner components or electric parts.

Check the setting when starting up of operation after power failure or turning off of power
switch. The stored items may be damaged due to the change of setting.

Be careful not to tip over the unit during movement to prevent damage or injury.

Prepare a safety check sheet when you request any repair or maintenance for the safety of service

personnel.

CAUTION

40

7

ENVIRONMENTAL CONDITIONS

This equipment is designed to be safe at least under the following conditions (based on the IEC-1010-1):

Ŷ Indoor use;

Ŷ Altitude up to 2000 m;

Ŷ Ambient temperature 5

o

C to 40oC

Ŷ Maximum relative humidity 80% for temperature up to 31

o

C decreasing linearly to 50% relative humidity

at 40

o

C;

Ŷ Mains supply voltage fluctuations not to exceed 㫧10% of the nominal voltage;

Ŷ Other supply voltage fluctuations as stated by the manufacturer;

Ŷ Transient overvoltages according to Installation Categories (Overvoltage Categories) II; For mains

supply the minimum and normal category is II;

Ŷ Pollution degree 2 in accordance with IEC 664.

41

8

FREEZER COMPONENTS

8

1

6

2

4

12

15 (inside)

14

5

3

11

9

10

7

5 (inside)

17

1816

13

19

42

9

FREEZER COMPONENTS

1. Outer door: To open the door, grip the handle. On closing, lock the door latch completely.

2. Handle: Always grip this handle to open and close the outer door.

3. Door latch: Always lock the latch when the outer door is closed.

4. Magnetic door gasket: This provides a tight door seal and prevents cold air leak. Keep clean.

5. Access port (rear and bottom): This is used for leading a cable and sensor of a measuring

equipment, or nozzle of back-up system to chamber.

6. Inner door: The operation of the inner door should be quick to minimize the temperature rise in
chamber. Lock the door latch completely when the door is closed. The door is removable for cleaning
or defrosting. See page 23 “Routine maintenance”.

7. Lock: Turn clockwise to 180

o

with a key and the outer door is securely locked.

8. Control panel (on the upper front of the door): Used for temperature setting and indication of
operating status is displayed on the panel. See page 10 for details.

9. Caster: 4 casters are provided to facilitate moving of the cabinet. For the installation, adjust the
leveling foot so that the front 2 casters cannot contact with the floor.

10. Leveling foot: The height of the freezer can be adjusted by this screw type foot. Keep the unit in
level at the installation.

11. Fixture (on back side): 2 fixtures are provided as spacers between the cabinet and wall and also
serve as hooks to fix the unit. See page 12 “Installation”.

12. Air intake vent (grille): Do not block this vent to keep the proper cooling performance.

13. Power switch: This is for turning ON/OFF the power to the unit. ON – “I” OFF – “○”

14. Space for temperature recorder: An automatic temperature recorder (optional component) can be

attached here. See page 31“Temperature recorder (Option)”.

15. Condenser filter (behind the grille): This filter prevents the dust from accumulating on the
condenser. The dusty filter may cause failure of refrigerating device. Clean the filter once a month.
See page 22 “Routine maintenance” for the cleaning.

16. Battery switch: This is a switch for a battery for power failure alarm. Normally, turn on this switch.
Be sure to turn off this switch if the freezer is not in operating for the long period (over one month).

17. Remote alarm terminal: This is used to notice an alarm condition of the unit to remote location.
Refer to page 18 “Remote alarm terminal”.

18. Space for optional component:

19. Door switch: This switch detects the open/close status of outer door.

43

10

FREEZER COMPONENTS

Control panel

1. Buzzer stop key (BUZZER): To silence the audible alarm under alarm condition, press this key.

The buzzer during alarm test cannot be silenced by this key.

2. Set key (SET): Temperature setting mode is led by pressing this key and the changeable digit is
flashed. By pressing this key again, the setting is memorized. The set mode returns to the
temperature display mode automatically when 90 seconds has passed without any key operation. Refer
to page 14 for details.

3. Digit shift key ( ): Pressing this key in the setting mode causes the changeable digit to shift. Key
lock is available by pressing this key for more than 5 seconds in the temperature display mode. Refer to
page 14 for details.

4. Numerical value shift key ( ): Pressing this key in the setting mode causes the numerical value to
shift. ON-OFF of key lock can be selected by pressing this key in the key lock mode. By pressing this
key for more than 5 seconds in the temperature display mode leads setting mode for alarm temperature
and alarm resume time. Refer to page 14 and 15 for details respectively.

5. Digital temperature indicator: This indicator shows the present chamber temperature or set
temperature.

6. Alarm lamp (ALARM): This lamp is flashed during alarm condition.

7. Alarm test key (ALARM TEST): To check the alarm system during freezer operation. Pressing this

key with the battery switch ON gets the alarm lamp to flash, the remote alarm to operate, and the buzzer
to sound.

8. Door check lamp (DOOR): This lamp lights when the door is open.

9. Filter check lamp (FILTER): This lamp lights when the excessive dust is accumulated on the

condenser filter. When this lamp lights, clean the condenser filter following the procedure on page 22.

10. Battery check lamp (BATTERY): This lamp lights to recommend the battery replacement. This
lamp blinks when a fan motor is maintained. For the replacement, consult Sanyo sales representative or
agent.

11. Status monitor lamp (STATUS): This lamp lights when environmental condition or status gets
worse or the unit is out of normal operation.

12. Status key (STATUS): By pressing this key in the event of the status monitor lamp ON, the status
code is displayed on the temperature indicator. This key is not effective when the freezer is running
normally. See page 19 for details.

1

ULTRA LOW

BATTERY

STATUS

FILTER

A

LARM

DOOR

TEMPERATURE

BUZZER

ALARM

TEST

STATUS SET

7 12 2 3

4

5 1011 9 68

44

11

INSTALLATION SITE

To operate this unit properly and to obtain maximum performance, install the unit in a location with the
following conditions:

1. A location not subjected to direct sunlight
Installation in a location subjected to direct sunlight may lead to inadequate cooling.

2. A location with adequate ventilation
Leave at least 10 cm around the unit for ventilation. Poor ventilation will result in a reduction of the
refrigeration capacity.

3. A location away from heat generating sources
Avoid installing the unit near heat-emitting appliances such as gas ranges or stoves. Heat can cause
inefficient refrigeration.

4. A location not prone to high humidity

WARNING

Install the unit on a sturdy floor. If the floor is not strong enough or the installation site is not
adequate, this may result in injury from the unit falling or tipping over.
Select a level and sturdy floor for installation. This precaution will prevent the unit from tipping.
Improper installation may result in water spillage or injury from the unit tipping over.

㩵 A location not prone to high humidity

WARNING

Do not use the unit outdoors. Current leakage or electric shock may result if the unit is exposed to
rain water.
Never install the unit in a humid place or a place where it is likely to be splashed by water.
Deterioration of the insulation may result which could cause current leakage or electric shock.

㩵 A location without flammable or corrosive gas

WARNING

Never install the unit in a flammable or volatile location. This may cause explosion or fire.
Never install the unit where acid or corrosive gases are present as current leakage or electric shock
may result due to corrosion.

45

12

INSTALLATION

1. Remove the packaging materials and tapes

Remove all transportation packaging materials and tapes. Open the doors and ventilate the unit. If the
outside panels are dirty, clean them with a diluted neutral dishwashing detergent. (Undiluted detergent
can damage the plastic components. For the dilution, refer to the instruction of the detergent.) After
the cleaning with the diluted detergent, always wipe it off with a wet cloth. Then wipe off the panels with
a dry cloth.

2. Adjust the leveling foot
Extend the leveling feet by rotating them
counterclockwise to contact them to the floor.
Ensure the unit is level. (Fig.1)

3. Fix the unit
Two fixtures are attached to the rear of the frame.
Fix the frame to the wall with these fixtures and rope
or chain. (Fig. 2)

4. Ground (earth)

WARNING

Use a power supply outlet with ground (earth) to prevent electric shock. If the power supply outlet

is not grounded, it is necessary to install a ground by qualified engineers.
Never ground the unit through a gas pipe, water main, telephone line or lightning rod. Such
grounding may cause electric shock in the case of an incomplete circuit.

Fixture

Leveling foot

Fig.1

Fig. 2

46

13

START-UP OF UNIT

Follow the procedures for the initial and consequent operations of the unit.

1. Connect the power cord to the dedicated outlet having appropriate rating with the chamber empty, and
turn on the power switch on the freezer.

2. Turn off the switch of the back-up system (optional component) if it is installed.

3. Check that the battery switch is ON.

4. The audible alarm may activated. In this case, press the buzzer stop key (BUZZER) to silence the

alarm.

5. Set the desired chamber temperature. See page 14 for the temperature setting.

6. Check that the chamber temperature reaches the desired temperature.

7. Turn on the switch of back-up system (optional component) if it is installed.

8. Check that the alarm lamp lights and the buzzer sounds by pressing the alarm test key.

9. After confirming the above, you can put articles into the freezer chamber in a small batch to prevent the

temperature rise.

47

14

CHAMBER TEMPERATURE SETTING

Table 1 shows the basic procedure for setting the chamber temperature. Perform key operations in the
sequence indicated in the table. The example in the table is based on the assumption that the desired
temperature is -75

o

C.

Note: The unit is set at the factory that the chamber temperature -80

o

C.

Table 1. Basic operation sequence (Example: Chamber temperature -75

o

C)

Description of operation Key operated Indication after operation

1 Turn the power switch ON.

----

The current chamber temperature is
displayed.

2 Press set key. SET

The second digit is flashed.

When pressed, the figure of settable
digit changes.

3

Set to -75 with the numerical value
shift key and digit shift key.

When pressed, the settable digit
is shifted.

4 Press set key. SET

Set temperature is memorized and the
current chamber temperature is
displayed.

Note:

• The temperature set mode returns to the temperature display mode automatically when 90 seconds has
passed without any key operation.

• Although the value of the chamber temperature setting can range from -50

o

C to -90oC, the guaranteed

temperature when there is no load is -85

o

C when the ambient temperature is 30oC.

KEY LOCK FUNCTION

This unit is provided with the key lock function. When the key lock is ON, change of temperature setting
through the key pad is not available. The key lock is set in OFF at the factory.

Display Mode Function

L 0 Key lock is OFF Enable to change of temperature setting

L 1 Key lock is ON Disable to change of temperature setting

Table 2. Procedure for key lock setting (change from key lock OFF to key lock ON)

Description of operation Key operated Indication after operation

1 ----

The current chamber temperature is
displayed.

2 Press digit shift key for 5 seconds.

The first digit is flashed.

3

Press numerical value shift key
and scroll the figure to 1.

When pressed, the figure of settable
digit changes.

4 Press set key. SET

The key lock is set to ON.
The current chamber temperature is
displayed.

48

15

ALARM TEMPERATURE SETTING

This unit is provided with the high and low temperature alarm and the temperature at which the alarm is
activated is changeable.
The following procedure shows the setting of alarm temperature according to the condition below:
High temperature alarm: activates at the temperature 5

o

C higher than the set temperature

Low temperature alarm: activates at the temperature 5

o

C lower than the set temperature

Note:
The alarm temperature is set at the factory 10

o

C higher and lower than the set temperature.

The available range of alarm temperature is between 5

o

C and 20oC higher or lower than the set

temperature.

Table 3. Procedure for setting high temperature alarm

Description of operation Key operated Indication after operation

1 ----

The current chamber temperature is
displayed.

2

Press numerical value shift key for
about 5 seconds.

The first digit is flashed.

3

Press numerical value shift key
and scroll the figure to 1.

The first digit is flashed.

4 Press set key. SET The first digit is flashed.

When pressed, the figure of settable
digit changes.

5

Scroll the figure to 005 by using
digit shift key and numerical value
shift key

When pressed, the changeable digit
moves.

6 Press set key. SET

Alarm temperature is memorized and
the current chamber temperature is
displayed.

Table 4. Procedure for setting low temperature alarm

Description of operation Key operated Indication after operation

1 ----

The current chamber temperature is
displayed.

2

Press numerical value shift key for
about 5 seconds.

The first digit is flashed.

3

Press numerical value shift key
and scroll the figure to 2..

The first digit is flashed.

4 Press set key. SET

The first digit is flashed.

When pressed, the figure of settable
digit changes.

5

Scroll the figure to -05 by using
digit shift key and numerical value
shift key

When pressed, the changeable digit
moves.

6 Press set key. SET

Alarm temperature is memorized and
the current chamber temperature is
displayed.

49

16

SETTING OF ALARM RESUME TIME

The alarm buzzer is silenced by pressing buzzer stop key (BUZZER) on the control panel during alarm
condition (The remote alarm is not silenced).
The buzzer will be activated again after certain suspension if the alarm condition is continued. The
suspension time can be set by following the procedure shown in the Table 6 below.
The example in the table is based on the assumption that the desired duration is 20 minutes.

Note: The duration is set in 30 minutes at the factory.

Table 6. Setting procedure for alarm resuming time (change from 30 minutes to 20 minutes)

Description of operation Key operated Indication after operation

1 ----

The current chamber temperature is
displayed.

2 Press digit shift key for 5 seconds.

The first digit is flashed.

The settable digit is shifted.

3

Set the figure to F25 with the digit
shift key and numerical value shift
key.

When pressed, the figure of settable

digit changes.

4 Press set key. SET

The current reset time is displayed.
The middle digit is flashed.

5

Set the figure to 020 with the
numerical value shift key.

When pressed, the figure of settable
digit changes.

6 Press set key. SET

The setting is memorized and
the current chamber temperature is
displayed.

• The settable alarm resume time is 10, 20, 30, 40, 50, or 60 minutes (The setting is 010, 020, 030, 040,
050, or 060). The buzzer would not reset if the reset time is set in 000.

• It is recommended to set the alarm resume time when the freezer is not under alarm condition. The
setting during alarm condition is effective on the next alarm condition.

• The setting cannot be changed during power failure.

• The remote alarm during power failure or buzzer and remote alarm during alarm test cannot be
silenced.

• The set mode returns to the temperature display mode automatically when 90 seconds has passed
without any key operation. In this case, any setting before pressing set key (SET) is not memorized.

50

17

REMOTE ALARM TERMINAL

The terminal of the remote alarm is installed at the lower left side of the unit. The alarm is outputted
from this terminal. Contact capacity is DC 30 V, 2 A.
Contact output:

between COM. and N.O. between COM. and N.C.
At normal Open Close
At abnormal Close Open

Note:
The alarm is actuated when the power cord is disconnected from the outlet or the power switch is OFF.

REMOTE ALARM

N.C. COM N.O.

MAX DC30V 2A

51

18

MONITOR OF FREEZER STATUS

The freezer has a function to monitor the running status of the unit as shown in table 7 below. This is to
notice the running status getting worse (not failure).

1. The status monitor lamp is lit when one of the running status shown in table 7 is detected.

2. The S code (--X, X: 1 to 3) is displayed on the temperature indicator by pressing STATUS key when

the STATUS lamp is lit.

3. Pressing the STATUS key again returns to current chamber temperature on the temperature indicator.
(The indication returns to the chamber temperature display automatically when no key is operated for 90
seconds.)

Table 7. Monitor of running status

Kind of

function

Status Indication

If this status

continues

Remedy

Notice of
abnormal
ambient
temperature

When the ambient
temp. is over approx.
35

o

C or lower than

about 0

o

C.

STATUS lamp
lights.
“--1” is displayed.

Decrease of cooling
performance or
durability of
refrigerating circuit.

Recheck air­conditioning of
installed site.

Notice of low
voltage

When the power
source voltage is
less than approx.
195V when the rated
voltage is between
220 and 240V.

STATUS lamp
lights.
“--2” is displayed.

Abnormal heat at
power supply outlet
or degrade of
starting performance
of refrigerating
circuit

Use dedicated
power source.

Notice of
overload
condition

When the running
rate of refrigerating
Circuit is higher than
usual.

STATUS lamp
lights.
“--3” is displayed.

Decrease of cooling
performance or
durability of
refrigerating circuit.

1. This is likely to
happen when a
large amount of
materials is stored.

2. Check ambient
temp., voltage, and
sealing of
outer/inner door.

Note:

• The S code displayed on the temperature indicator is changed every few seconds if two or three status
shown in the above table are detected at the same time. （--1 ⇒ --2 ⇒ --3 ⇒ --1 repeated）

• The monitoring function does not trigger a buzzer or conduct a safety operation.
the case of multiple indication of S code, follow the remedy for each status.

• The status monitor lamp (STATUS) may be lit under normal running condition when the independent
inner door (MDF-7ID or MDF-5ID) is installed because of less cooling performance. In this case, adjust
the air conditioning so that the ambient temperature is around 23

o

C, or set the chamber temperature

10

o

C higher than the current setting.

52

19

CHANGE OF COMPRESSOR DELAY TIME

The delay time of high and low stage side compressor can be changed to reduce the load on the power
line and to facilitate the start-up (reset) of the freezer after power failure.

The example in the table is based on the assumption that the delay time is changed to 4 minutes.
(The delay time is set in 2 minutes at the factory.)

Note:

• The delay time should be the same for high stage side and low stage side compressors.

• The setting range for delay time is between 2 and 15 minutes. The cool down of chamber temperature
may be slow when the setting of delay time is over 5 minutes, depending on the installation environment.
There is no need of changing the delay time when the capacity of power source is adequate.

Table 8. Changing procedure for delay time (change from 2 minutes to 4 minutes)

Description of operation Key operated Indication after operation

1 ----

The current chamber temperature is
displayed.

2

Press numerical value shift key for
5 seconds.

The first digit is flashed.

3

Set the figure to F05 with the
numerical value shift key.

When pressed, the figure of settable

digit changes.

4 Press set key. SET

The current delay time is displayed.
The first digit is flashed.

5

Set the figure to 004 with the
numerical value shift key.

When pressed, the figure of the first
digit changes.

6 Press set key. SET

The delay time is memorized and
the current chamber temperature is
displayed.

• The compressor starts to operate with the delay time set by the above procedure at the time of power
on or after power failure. However, the start up of the low stage side compressor is affected by the
chamber temperature and the cascade condenser temperature. The delay time varies depending on
how they meet the start up conditions.

53

20

CHANGE OF DOOR ALARM DELAY TIME

The buzzer of door alarm is activated with 2 minutes delay when the door is open. The delay time is
changeable.
Follow the procedure in table 9 below to change the setting of delay time. The procedure assumes that
the delay time is changed from 2 minutes to 3 minutes.
(The delay time is set in 2 minutes at the factory.)

Table 9. Changing procedure for delay time (change from 2 minutes to 3 minutes)

Description of operation Key operated Indication after operation

1 ----

The current chamber temperature is
displayed.

2

Press numerical value shift key for
5 seconds.

The first digit is flashed.

3

Set the figure to F04 with the
numerical value shift key.

When pressed, the figure of settable

digit changes.

4 Press set key. SET

The current delay time is displayed.
The first digit is flashed.

5

Set the figure to 003 with the
numerical value shift key.

When pressed, the figure of the first
digit changes.

6 Press set key. SET

The delay time is memorized and
the current chamber temperature is
displayed.

Note:

• The setting range for delay time is between 1 and 15 minutes.

54

21

ALARMS & SAFETY FUNCTIONS

This unit has the alarms and safety functions shown in Table 5, and also self diagnostic functions.

Table 5. Alarms and safety functions

Alarm & Safety Situation Indication Buzzer Safety operation

High temperature
alarm

If the chamber temperature is higher
than the temperature at which the
high temperature alarm is activated.

Low temperature
alarm

If the chamber temperature is lower
than the temperature at which the
low temperature alarm is activated.

ALARM lamp is flashed.
Temperature indicator is
flashed.

Intermittent tone with
15 minutes delay.

Remote alarm with 15
minutes delay.

Power failure alarm

When the power to the unit is
disconnected.

ALARM lamp is flashed. Intermittent tone Remote alarm.

Door alarm When the door is open. Door check lamp lights.

Intermittent tone with
2minutes delay.

-----

Filter check When the condenser filter is clogged. Filter check lamp lights. Intermittent tone -----

Battery check

When about 3 years has passed with
power switch ON.

Battery check lamp lights. ----- -----

Fan motor check

When about 5.5 years has passed with
power switch ON.

Battery check lamp
flashed.

----- -----

Auto-return

When there is no key pressing in
each setting mode for 90 seconds.

Chamber temperature is
displayed.

-----

Finishing of each
setting mode.

Key lock When the key lock is ON. ----- -----

Change of setting is
disable.

If the thermal sensor is disconnected.

ALARM lamp is flashed.
E01 and chamber temp.
are displayed alternately.

Intermittent tone

Remote alarm.
Unit keeps continuous
running.

If the thermal sensor is short-circuited.

ALARM lamp is flashed.
E02 and chamber temp.
are displayed alternately.

Intermittent tone

Remote alarm.
Unit keeps continuous
running.

If the cascade sensor is disconnected.

ALARM lamp is flashed.
E03 and chamber temp.
are displayed alternately.

Intermittent tone Remote alarm.

If the cascade sensor is short
circuited.

ALARM lamp is flashed.
E04 and chamber temp.
are displayed alternately.

Intermittent tone Remote alarm.

If the filter sensor is disconnected.

ALARM lamp is flashed.
E05 and chamber temp.
are displayed alternately.

Intermittent tone Remote alarm.

Sensor abnormality

If the filter sensor is short-circuited.

ALARM lamp is flashed.
E06 and chamber temp.
are displayed alternately.

Intermittent tone Remote alarm.

Battery switch
check

When the battery switch is OFF during
alarm test.

ALARM lamp is flashed.
E09 is flashed.

----- -----

Condenser temp.
abnormality

In the event of failure of fan motor for
cooling the compressor

E10 and chamber temp.
are displayed alternately.

Intermittent tone

Remote alarm.
Compressor of high
stage side stops.

Note:

• When the operation is started in high ambient temperature, the filter check lamp is sometimes flashed.
In this case, the lamp is off automatically when the chamber temperature is getting lower.

• The freezer resumes the operation after power failure with the temperature setting before power failure
as the chamber temperature setting and alarm temperature setting are memorized in the volatile memory.

• The chamber temperature is displayed for 5 seconds by pressing buzzer stop key (BUZZER) during
power failure alarm. Then the buzzer is silenced. The alarm lamp keeps flashing.

55

22

ROUTINE MAINTENANCE

WARNING

Always disconnect the power supply to the unit prior to any repair or maintenance of the unit in

order to prevent electric shock or injury.
Ensure you do not inhale or consume medication or aerosols from around the unit at the time of
maintenance. These may be harmful to your health.

Cleaning of cabinet

㩵 Clean the unit once a month. Regular cleaning keeps the unit looking new.
㩵 Use a dry cloth to wipe off small amounts of dirt on the outside and inside of the unit and all

accessories. If the outside panels are dirty, clean them with a diluted neutral dishwashing detergent..
(Undiluted detergent can damage the plastic components. For the dilution, refer to the instruction of the
detergent.)
After the cleaning with the diluted detergent, always wipe it off with a wet cloth. Then wipe off the
cabinet or accessories with a dry cloth.

㩵 Never pour water onto or into the unit. Doing so can damage the electric insulation and cause failure.
㩵 The compressor and other mechanical part are completely sealed. This unit requires absolutely no

lubrication.
㩵 There is a fan behind the compressor, so be very careful if you stick your hand into this part of the unit.

Cleaning of condenser filter

This unit is provided with the filter check lamp on the control panel. Clean the filter when this lamp lights.
Clean the filter once a month even if the check lamp is not on since a clogged filter may cause shorter
compressor life as well as the poor cooling.
Clean the filter by the procedure below.

1. Open the grille by pulling it to you as shown in the
figure.

2. Take out the condenser filter.

3. Wash the filter with water.

4. Replace the filter and the grille.

5. Check that the filter check lamp is off in the event the

check lamp was ON.

WARNING

Do not touch the condenser directly when the filter is removed for cleaning. This may cause injury by

hot surface.

56

23

ROUTINE MAINTENANCE

Defrosting of inside wall

The frost is built at the upper portion of the chamber and inner door. The excessive frost possibly make
some gap between the cabinet and door gasket, which may cause poor cooling. Remove the frost on
the inner door with a scraper enclosed with the unit. Following shows the procedure for removing the
chamber frost.

Note: For removing the frost, do not use a tool with sharp edge such as a knife or a screw driver.

1. Turn off the back-up system if applicable.

2. Take out and transfer all the contents to another freezer or a container which is refrigerated by liquid

carbon dioxide or dry ice.

3. Turn off the power switch of the freezer.

4. Open the outer door and inner door. Remove the

inner door by lifting up as shown in the figure.

5. Leave the freezer as it is.

6. The water accumulated on the bottom of the

chamber should be wiped up with a dry cloth.

7. After cleaning the chamber and inner door, replace
the inner door and start up the unit according to the
procedure on page 14.

8. Put back the articles into the sufficiently cooled
freezer compartment.

9. Turn on the back-up system if it is provided.

57

24

TROUBLE SHOOTING

If the unit malfunctions, check out the following before calling for service.

Malfunction Check/Remedy

The chamber is not cooled
at all

㩵 The circuit breaker of power source is active.
㩵 The voltage is too low (In this case, call an electrician).
㩵 The power is not supplied.

㩵 The breaker is free.
㩵 The large amount of articles (load) is stored in the chamber at one

time.

The cooling is poor

㩵 The ambient temperature is too high.
㩵 The latch of inner door is not closed completely. The outer door

is not closed firmly. (The frost or ice between the cabinet and door
gasket possibly prevents door seal.)

㩵 The air intake vent is blocked.
㩵 The condenser filter is clogged. Always clean the filter when the

filter check lamp is lit.

㩵 The door is not shut tightly.
㩵 The inner door is not installed correctly.
㩵 The set temperature in the controller is not set properly.
㩵 The grille is blocked out.
㩵 The filter is clogged.
㩵 The freezer is in the direct sunlight.
㩵 There is any heating source near the freezer.
㩵 A rubber cap and insulation are not set correctly.
㩵 You put too many unfrozen articles into the chamber.

Alarm test key cannot
actuate the alarm

㩵 The alarm is activated only when the power switch is ON.
㩵 When only the buzzer or only the alarm is actuated by the alarm test

key, the unactuated part is out of order, and must be replaced.

Note:

If the malfunction is not eliminated after checking the above items, or the malfunction is not shown in the
above table, contact Sanyo sales representative or agent.

58

25

REPLACEMENT OF BATTERY

Location of a nickel-metal-hydride battery

This unit is provided a nickel-metal-hydride battery for the power failure warning device. The battery is
located in the electrical box inside the cover on the lower left side. (Fig. 1)

The high voltage components are enclosed in the electrical box. The cover should be removed
by a qualified engineer or a service personnel only to prevent the electric shock..

Removal of nickel-metal-hydride battery

1. Turn off the power switch and disconnect the power supply plug.

2. As shown in the Fig. 2, remove 4 screws fixing the side cover with a screw driver and remove the side

cover..

3. Remove 4 screws fixing the electrical box cover with a screw driver. (Fig. 3)

4. Disconnect the battery connector and remove 2 screws fixing the battery mounting plate. (Fig. 4)

5. Take out the battery.

6. Follow the procedure for recycling or proper disposal.

Fig. 4

Battery
mounting plate

Electrical box cover

Fig. 3

Fig. 1

Electrical box

Fig. 2

Switch cover

Side cover

59

26

DISPOSAL OF UNIT

WARNING

If the unit is to be stored unused in an unsupervised area for an extended period ensure that children
do not have access and doors cannot be closed completely.
The disposal of the unit should be accomplished by appropriate personnel. Always remove
doors to prevent accidents such as suffocation.

Recycle of battery

The unit contains a rechargeable battery. The battery is recyclable. At the end

of it’s useful life, check with you local solid officials option or proper disposal.

䋪Label indication is obliged to comply with Taiwanese battery regulation.

ᑜ㔚ᳰ㩷
⺧࿁ᡴ㩷

60

27

DISPOSAL OF UNIT

Waste Electrical and Electronic Equipment (WEEE) Directive-2002/96/EC

(English)

Your SANYO product is designed and manufactured with high quality materials and components which
can be recycled and reused.

This symbol means that electrical and electronic equipment, at their end-of-life, should be disposed of
separately from your household waste.

Please dispose of this equipment at your local community waste collection/recycling centre.

In the European Union there are separate collection systems for used electrical and electronic products.

Please help us to conserve the environment we live in!

(German)

Ihr SANYO Produkt wurde entworfen und hergestellt mit qualitativ hochwertigen Materialien und
Komponenten, die recycelt und wiederverwendet werden können.

Dieses Symbol bedeutet, daß elektrische und elektronische Geräte am Ende ihrer Nutzungsdauer von
Hausmüll getrennt entsorgt werden sollen.

Bitte entsorgen Sie dieses Gerät bei Ihrer örtlichen kommunalen Sammelstelle oder im Recycling Centre.

In der Europäischen Union gibt es unterschiedliche Sammelsysteme für Elektrik- und Elektronikgeräte.

Helfen Sie uns bitte, die Umwelt zu erhalten, in der wir leben!

Note:
This symbol mark and recycle system are applied only to EU countries
and not applied to the countries in the other area of the world.

61

28

DISPOSAL OF UNIT

(French)

Votre produit Sanyo est conçu et fabriqué avec des matèriels et des composants de qualité supérieure qui
peuvent être recyclés et réutilisés.

Ce symbole signifie que les équipements électriques et électroniques en fin de vie doivent être éliminés
séparément des ordures ménagères.

Nous vous prions donc de confier cet équipement à votre centre local de collecte/recyclage.
Dans l’Union Européenne, il existe des systèmes sélectifs de collecte pour les produits électriques et
électroniques usagés.

Aidez-nous à conserver l’environnement dans lequel nous vivons !

Les machines ou appareils électriques et électroniques contiennent fréquemment des matières qui, si
elles sont traitées ou éliminées de manière inappropriée, peuvent s’avérer potentiellement dangereuses
pour la santé humaine et pour l’environnement.
Cependant, ces matières sont nécessaires au bon fonctionnement de votre appareil ou de votre machine.
Pour cette raison, il vous est demandé de ne pas vous débarrasser de votre appareil ou machine usagé
avec vos ordures ménagères.

(Spanish)

Los productos SANYO están diseñados y fabricados con materiales y componentes de alta calidad, que
pueden ser reciclados y reutilizados.

Este símbolo significa que el equipo eléctrico y electrónico, al final de su ciclo de vida, no se debe
desechar con el resto de residuos domésticos.

Por favor, deposite su viejo “televisor” en el punto de recogida de residuos o contacte con su
administración local.

En la Unión Europea existen sistemas de recogida específicos para residuos de aparatos eléctricos y
electrónicos.

Por favor, ayúdenos a conservar el medio ambiente!

62

29

DISPOSAL OF UNIT

(Portuguese)

O seu produto SANYO foi concebido e produzido com materiais e componentes de alta qualidade que
podem ser reciclados e reutilizados.

Este símbolo significa que o equipamento eléctrico e electrónico no final da sua vida útil deverá ser
descartado separadamente do seu lixo doméstico.

Por favor, entregue este equipamento no seu ponto local de recolha/reciclagem.

Na União Europeia existem sistemas de recolha separados para produtos eléctricos e electrónicos
usados.

Por favor, ajude-nos a conservar o ambiente em que vivemos!

(Italian)

Il vostro prodotto SANYO è stato costruito da materiali e componenti di alta qualità, che sono riutilizzabili o
riciclabili.

Prodotti elettrici ed elettronici portando questo simbolo alla fine dell’uso devono essere smaltiti
separatamente dai rifiuti casalinghi.

Vi preghiamo di smaltire questo apparecchio al deposito comunale.
Nell’Unione Europea esistono sistemi di raccolta differenziata per prodotti elettrici ed elettronici.

Aiutateci a conservare l’ambiente in cui viviamo!

63

30

DISPOSAL OF UNIT

(Dutch)

Sanyo producten zijn ontwikkeld en gefabriceerd uit eerste kwaliteit materialen, de onderdelen kunnen
worden gerecycled en weer worden gebruikt.

Het symbool betekent dat de elektrische en elektronische onderdelen wanneer deze vernietigd gaan
worden , dit separaat gebeurt van het normale huisafval.

Zorg ervoor dat het verwijderen van de apparatuur bij de lokaal erkende instanties gaat gebeuren.
In de Europese Unie wordt de gebruikte elektrische en elektronische apparatuur bij de daarvoor wettelijke
instanties aangeboden.

Alstublieft help allen mee om het milieu te beschermen.

(Swedish)

Din SANYO produkt är designad och tillverkad av material och komponenter med hög kvalitet som kan
återvinnas och återanvändas.

Denna symbol betyder att elektriska och elektroniska produkter, efter slutanvändande, skall sorteras och
lämnas separat från Ditt hushållsavfall.

Vänligen, lämna denna produkt hos Din lokala mottagningstation för avfall/återvinningsstation.

Inom den Europeiska Unionen finns det separata återvinningssystem för begagnade elektriska och
elektroniska produkter.

Vänligen, hjälp oss att bevara miljön vi lever i!

64

31

TEMPERATURE RECORDER (OPTION)

An automatic temperature recorders is available for this freezer as the optional component. The type of
the recorder is MTR-G85.
Following shows the attachment procedure.

1. Remove four screws on the front panel and take it off.
By removing four screws, take off the left side panel.
Then take off the cover for the recorder mounting space
by removing four screws. (Fig. 1)

2. As shown in the Fig. 2, insert the temperature
recorder to the mounting space and fix it to the back
side of the front panel by using the recorder fixture
enclosed with the recorder.

3. Take off the recorder sensor cover in the chamber
(bottom left side) by removing two screws. Then
remove the rubber cap and insulation covering the
sensor port. (Fig. 3)

4. As shown in the Fig. 4, pass the recorder sensor
through the sensor guide pipe from the front to the back.
The sensor guide pipe is provided on the upper left side
of the base compartment.

5. Take out the recorder sensor from the guide pipe at
the back side and pass the sensor to the chamber
through the access port. (Fig. 5)

6. Attach the recorder sensor on the sensor cover with
the enclosed clips. Seal the sensor port with a silicon
and replace the recorder sensor cover. Fix the cover
to the inside wall. (Fig. 6)

7. Remove the connector cover. Connect the recorder
connector at the end of the power cord with the white
connector on the left of the base compartment. Bind
the extra lead wire of the sensor with a nylon clip on the
back of the recorder. (Fig. 7)

8. Replace the left side panel and front panel and fix them with screws.

9. Operate the freezer until the chamber temperature gets to the set temperature. Check the recorded
temperature and chamber temperature displayed on the control panel. Adjust the zero adjustment
volume on the temperature recorder so that the recorded temperature can corresponds with the
displayed temperature if they are not compliance each other

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

connector

Sensor guide pipe

Fig. 1

Recorder
sensor

Silicon

65

32

BACK-UP SYSTEM (OPTION)

WARNING

As with any equipment that uses CO

2

gas, there is a likelihood of oxygen depletion in the vicinity

of the equipment. It is important that you assess the work site to endure there is suitable and

sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a

safe environment must be considered. These may include atmosphere monitoring and warning

devices.

This freezer can be provided with a back-up system (CVK-UB2) which is available as an optional
component. For the installation, refer to the instruction manual enclosed with the system.

1. Switch of back-up system (BACKUP)
When turning on the system, the lamp is brightened.
This means that the system is ready. To stop the
operation of the system, turn off this switch.

2. Test switch (TEST)
This switch is for checking the operation of back-up
system. Pressing this switch is resulted in the release
of liquid carbon dioxide without system operation.

3. Temperature setting knob (TEMP. SET)
With this knob, set the temperature at which the system
is operated. The effective set temperature range is
between -50

o

C and -70oC.

1

2

3