Hoshizaki HRE-70A-UK User manual

NO. E4CA-672
ISSUED: NOV. 14, 2005
REVISED: APR. 4, 2006
HOSHIZAKI
COMMERCIAL
REFRIGERATOR/FREEZER
SERVICE MANUAL
MODEL HRE-70A(-UK)
HRE-140A(-UK)
HFE-70A(-UK)
HFE-140A(-UK)

i
CONTENTS PAGE
I.GENERALINFORMATION--------------------------------------------------------------------------- 1
1.SAFETYINSTRUCTIONS ------------------------------------------------------------------------- 1
2.CONSTRUCTION ----------------------------------------------------------------------------------- 3
3. MODEL NAME--------------------------------------------------------------------------------------- 4
4.SPECIFICATIONS ---------------------------------------------------------------------------------- 5
[a] HRE-70A(-UK) ----------------------------------------------------------------------------------- 5
[b] HRE-140A(-UK) --------------------------------------------------------------------------------- 6
[c] HFE-70A(-UK) ----------------------------------------------------------------------------------- 7
[d] HFE-140A(-UK) --------------------------------------------------------------------------------- 8
5.DIMENSIONS ---------------------------------------------------------------------------------------- 9
[a] HRE-70A(-UK) ----------------------------------------------------------------------------------- 9
[b] HRE-140A(-UK) --------------------------------------------------------------------------------10
[c] HFE-70A(-UK) ----------------------------------------------------------------------------------11
[d] HFE-140A(-UK) --------------------------------------------------------------------------------12
II.TECHNICALINFORMATION-----------------------------------------------------------------------13
1.WIRINGDIAGRAM ---------------------------------------------------------------------------------13
[a] HRE-70A(-UK) [Auxiliary Code: Before F-1] ---------------------------------------------13
[b] HRE-70A(-UK) [Auxiliary Code: From F-1] -----------------------------------------------14
[c] HRE-140A(-UK) [Auxiliary Code: Before F-1]--------------------------------------------15
[d] HRE-140A(-UK) [Auxiliary Code: From F-1] ---------------------------------------------16
[e] HFE-70A(-UK) [Auxiliary Code: Before F-1] ---------------------------------------------17
[f] HFE-70A(-UK) [Auxiliary Code: From F-1] -----------------------------------------------18
[g] HFE-140A(-UK) [Auxiliary Code: Before F-1]--------------------------------------------19
[h] HFE-140A(-UK) [Auxiliary Code: From F-1]----------------------------------------------20
2.REFRIGERATIONCIRCUIT ----------------------------------------------------------------------21
3. SEQUENCE-----------------------------------------------------------------------------------------22
4. ELECTRONIC CONTROLS----------------------------------------------------------------------24
[a] SETPOINTTEMPERATURE ---------------------------------------------------------------24
[b] CABINETTEMPERATURE DIFFERENTIAL --------------------------------------------24
[c] DEFROST CYCLE-----------------------------------------------------------------------------24
[d] DEFROST COMPLETION TEMPERATURE --------------------------------------------24
[e] CLOGGED CONDENSER DETECTION TEMPERATURE --------------------------24
[f] TEMPERATURE DISPLAY CYCLE--------------------------------------------------------24
[g] COMPRESSOR SOFT START -------------------------------------------------------------25
[h]HIGH PRESSURE SWITCH -----------------------------------------------------------------25
[i] CABINET TEMPERATURE AND TEMPERATURE DISPLAY -----------------------26
[j] RESOLUTION -----------------------------------------------------------------------------------26
[k] CHECKINGANDADJUSTING SETPOINTTEMPERATURE -----------------------26
[l] MANUAL DEFROST---------------------------------------------------------------------------27
[m] CANCELING SOFTSTART-----------------------------------------------------------------27
[n]INTERIORFAN MOTORANDLIGHTIN DOOR OPERATION------------------------27
5. ERROR CODES------------------------------------------------------------------------------------28
6. HEATER LAYOUT ----------------------------------------------------------------------------------34
III.SERVICEDIAGNOSIS -----------------------------------------------------------------------------35
1. COMPONENTS ------------------------------------------------------------------------------------35

ii
2. CONTROLLER BOARD --------------------------------------------------------------------------37
[a] SERVICING CONTROLLER BOARD -----------------------------------------------------37
[b]CHECKING THERMISTOR ------------------------------------------------------------------38
[c] CONTROLLER BOARD DIAGNOSIS -----------------------------------------------------39
IV. REMOVALAND REPLACEMENT OF COMPONENTS -----------------------------------41
1. ENCLOSURE ---------------------------------------------------------------------------------------41
[a] FRONT PANEL ---------------------------------------------------------------------------------41
[b] TOP COVER ------------------------------------------------------------------------------------41
[c] SIDE PANEL ------------------------------------------------------------------------------------41
[d]GRIP ----------------------------------------------------------------------------------------------41
[e] DOOR---------------------------------------------------------------------------------------------41
[f] LIFTHINGE --------------------------------------------------------------------------------------41
[g] DOOR GASKET--------------------------------------------------------------------------------42
2.REFRIGERATIONUNIT ---------------------------------------------------------------------------42
3. CONTROL BOX ------------------------------------------------------------------------------------43
4.THERMISTORS-------------------------------------------------------------------------------------43
5.REFRIGERATIONCIRCUIT ----------------------------------------------------------------------44
[a]REFRIGERANT---------------------------------------------------------------------------------44
[b] COMPRESSOR--------------------------------------------------------------------------------44
[c] EVAPORATORAND DEFROST HEATER-----------------------------------------------45
[d] CONDENSERAND DRIER------------------------------------------------------------------45
6.INTERIORFAN MOTOR --------------------------------------------------------------------------46
7. DRAIN PAN (THERMOSTAT, FUSE) ----------------------------------------------------------47
8.INTERIORLIGHT -----------------------------------------------------------------------------------48
9.DOOR HINGE ---------------------------------------------------------------------------------------48
10.TIP-RESISTANTKIT -------------------------------------------------------------------------------49
Symbol Meaning
Keep Dry
Cabinet Temperature
IncreasingTemperature
Decreasing Temperature
Manual Defrost

1
I. GENERAL INFORMATION
1. SAFETY INSTRUCTIONS
Thefollowinginstructionscontainimportantsafetyprecautionsandshouldbestrictlyobserved.
The terms used here are defined as follows:
WARNING: There is a possibility of death or serious injury to the service person and a third
party or the user due to improper service operations or defects in serviced
products.
CAUTION: There is a possibility of injury to the service person and a third party or the user
or damage to their property* due to improper service operations or defects in
serviced products.
* The term “damage to their property” here refers to extensive damage to household effects,
houses and pets.
WARNING
1. Always ask the user to keep children away from the work area. They may be injured by
tools or disassembled products.
2. When there is no need to energize the unit during disassembly or cleaning, be sure to
unplug the unit or disconnect the main power supply before servicing the unit to prevent
electric shocks.
3. If the unit must be energized for inspection of the electric circuit, use rubber gloves to avoid
contact with any live parts resulting in electric shocks.
4. Keep the following in mind when servicing the refrigeration circuit:
(1) Be sure to recover the refrigerant. Do not discharge it into the atmosphere. It will
affecttheenvironment.
(2) Check for any flames in the vicinity, and ensure good ventilation.
(3) If the refrigerant should leak in servicing, immediately put out any fire used in the
vicinity.
(4)Whenunbrazingtherefrigerationcircuitconnections,checkthatthecircuitiscompletely
evacuated. The refrigerant may produce a poisonous gas when coming in contact
with an open flame.
(5) Do not braze in an enclosed room to prevent carbon monoxide poisoning.
(6) In case of a refrigerant leak, locate and repair the leaking part completely. Leaked
refrigerantmay produce a poisonousgaswhen coming in contactwithan open flame.

2
(7) Before servicing, check the surface temperature of the refrigeration circuit to prevent
aburn.
5. Keep the following in mind when making electrical connections:
(1) Check for proper grounding connections, and repair if necessary to prevent electric
shocks.
(2)Alwaysuseservicepartsintendedfortheapplicablemodelforreplacementofdefective
parts. Usepropertoolsto secure the wiring. Otherwiseabnormal operationor trouble
may occur and cause electric leaks or fire.
(3)Checkforproperpartinstallations,wiringconditionsandsolderedorsolderlessterminal
connections to avoid fire, heat or electric shocks.
(4) Be sure to replace damaged or deteriorated power cords and lead wires to prevent
fire, heat or electric shocks.
(5) Cut-off lead wires must be bound using closed end connectors or the like, with their
closed ends up to avoid entrance of moisture that could lead to electric leaks or fire.
(6) After servicing, always use a megohmmeter (500V DC) to check for the insulation
resistance of at least 1 megohm between the live part (attachment plug) and the
dead metal part (grounding terminal).
(7) Do not service the electrical parts with wet hands to prevent electric shocks.
(8) The capacitors used for the compressor and other components may be under high
voltage and should be discharged properly before servicing.
CAUTION
1. After servicing, follow the instructions below:
(1) Check for water leaks in the water supply and drain pipes to prevent damage to the
vicinity including household effects.
(2) Always check the unit for proper operation before finishing services.
(3) Be sure to reassemble the parts completely. Loose assembly of such parts as control
boxcovermaycauseentranceof verminsresultinginashortcircuitbetweenterminals
and possible ignition.

3
2. CONSTRUCTION
HRE-140A
This refrigerator/freezer can be divided into the cabinet, refrigeration circuit, and electrical
parts.
1) The cabinet can be further divided into the food storage/refrigeration, condensing unit
and evaporator compartments.
The interior of the food storage/refrigeration compartment is made of stainless steel. The
exterior of the side walls is covered with stainless steel with some in-between space filled
with urethane foam for thermal insulation.
Front Panel
Lock
Door(L)
Door(R)
RefrigerationUnit
Trayslide
Trayslide
Support
Screw
Guide (A)
Guide (B)
Screw
Drain PanAssembly Screw
Screw
DrainCover(D)
Connector
(Connecttogether)
Switching Power Supply
Control Box
DoorHinge
(R,Up)
Interior
Light
DoorHinge
(R, Lo)
LiftHinge
Lock
Screw
LiftHinge
RearCover
TopCover
Magnet
Door Switch

4
To allow access to the interior, the openings at the front are provided with doors made of
stainless steel on both the interior and exterior and filled with urethane foam for thermal
insulation.
The evaporator compartment is also equipped with an opening at the front to provide
access for removal of the evaporator for maintenance and service.
The condensing unit compartment is located above the evaporator compartment at the
top of the unit. The condensing unit is removable from the top.
2) The refrigeration circuit is composed of the compressor, condenser, drier, capillary tube
and evaporator. These components are connected with copper tubes, welded to make
them airtight, and charged with a specified amount of refrigerant R134a or R404A.
Theevaporator is located insidetheevaporatorcompartment,whiletheothercomponents
are located inside the condensing unit compartment.
3) Theelectricalpartsincludethepowersupplycord,anti-condensationheaters,compressor,
condenser, condenser fan motor, interior fan motor, defrost heater, lamp, door switch,
switch power supply and antifreeze pipe heater attached inside or outside the cabinet;
the thermistor and thermal fuse in the refrigeration circuit; the controller board, relays,
fuse, ground fault interrupter, and transformer in the control box.
3. MODEL NAME
H R E - OOO O - UK
UK Model
TheonlydifferencesbetweentheUKmodelsand
othermodels are thisappliancetypecode“-UK”,
power supply cord and attachment plug.
Model Change Code
Alphabetical order
Width etc.
Approximate value in cm
70: 700mm
140: 1400mm
Destination
E: Europe and other overseas countries
Product Category
R: Refrigerator
F: Freezer
Hoshizaki

5
4. SPECIFICATIONS
[a] HRE-70A(-UK)
AC SUPPLY VOLTAGE *
POWER SUPPLY CAPACITY *
AMPERAGE *
STARTING AMPERAGE *
ELECTRIC CONSUMPTION (RATED) *
POWER FACTOR *
HEAT REJECTION
1 Phase 230V 50Hz
0.82kVA (3.57A)
2.31A
8.2A
421W (Except Drain Pan Heater 250W)
Heater: 497W Defrost: 497W
74%
535W
PULLDOWN TIME (10°C to 0°C)
SATURATION TEMPERATURE 30 min. (Ambient Temp. 43°C, No Load) Approx. -8°C (Ambient Temp. 43°C, No Load)
STORAGE CAPACITY
OUTSIDE DIMENSIONS
INSIDE DIMENSIONS
EXTERIOR
INTERIOR
INSULATION
644L
700mm(W) x 850mm(D) x 2100mm(H)
580mm(W) x 688mm(D) x 1533mm(H)
Stainless Steel, Galvanized Steel (Top, Rear)
Stainless Steel
Polyurethane Foam
AIR CIRCULATION
DEFROST SYSTEM
DEFROST DRAIN SYSTEM
Forced Air Interior Fan 4W x 2
Heater
Heater, Forced Evaporation
COMPRESSOR
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
HermeticModel FR8.5G
Fin and Tube Type (9 tubes high 2 rows deep), Fan Motor 4P 8W
Fin and Tube Type (4 tubes high 8 rows deep)
Capillary Tube 1.2mm DIA x 2.4mm DIA x 2500mm long
R134a 200g
CABINET TEMPERATURE CONTROL
DEFROST CONTROL
Microprocessor (Digital Temperature Indication)
Adjustable from -6 to 12°C
Microprocessor
ELECTRIC CIRCUIT PROTECTION
COMPRESSOR PROTECTION
Ground Fault Interrupter (with Overcurrent Protector)
Class I Appliance
Motor Protector (Auto-reset), Pressure Switch (Auto-reset)
INTERIOR LIGHT
TRAYSLIDE
WEIGHT
PACKAGE
100V 40W
Gastronorm-Bleche Hotel Pan Trayslide x 8
Net weight 141kg / Gross weight 169kg
Carton (Wooden Pallet) 770mm(W) x 920mm(D) x 2130mm(H)
OPERATING CONDITIONS Ambient Temp.: 5 - 43°C
Voltage Range: Rated voltage ±10%
* Theelectricalpropertiesarebasedonmeasurementsatambienttemperatureof43°CaccordingtotheTechnical
Requirements for Electrical Appliances.
** We reserve the right to make changes in specifications and design without prior notice.

6
[b] HRE-140A(-UK)
AC SUPPLY VOLTAGE *
POWER SUPPLY CAPACITY *
AMPERAGE *
STARTING AMPERAGE *
ELECTRIC CONSUMPTION (RATED) *
POWER FACTOR *
HEAT REJECTION
1 Phase 230V 50Hz
1.12 kVA (4.86A)
3.89A
12.6A
678W (Except Drain Pan Heater 250W)
Heater: 523W Defrost: 523W
78%
1105W
PULLDOWN TIME (10°C to 0°C)
SATURATION TEMPERATURE 36 min. (Ambient Temp. 43°C, No Load) Approx. -6°C (Ambient Temp. 43°C, No Load)
STORAGE CAPACITY
OUTSIDE DIMENSIONS
INSIDE DIMENSIONS
EXTERIOR
INTERIOR
INSULATION
1414L
1400mm(W) x 850mm(D) x 2100mm(H)
1280mm(W) x 688mm(D) x 1533mm(H)
Stainless Steel, Galvanized Steel (Top, Rear)
Stainless Steel
Polyurethane Foam
AIR CIRCULATION
DEFROST SYSTEM
DEFROST DRAIN SYSTEM
Forced Air Interior Fan 4W x 2
Heater
Heater, Forced Evaporation
COMPRESSOR
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
Hermetic Model SC10CL
Fin and Tube Type (9 tubes high 3 rows deep), Fan Motor 4P 8W
Fin and Tube Type (4 tubes high 8 rows deep)
Capillary Tube 1.2mm DIA x 2.4mm DIA x 1500mm long
R404A 230g
CABINET TEMPERATURE CONTROL
DEFROST CONTROL
Microprocessor (Digital Temperature Indication)
Adjustable from -6 to 12°C
Microprocessor
ELECTRIC CIRCUIT PROTECTION
COMPRESSOR PROTECTION
Ground Fault Interrupter (with Overcurrent Protector)
Class I Appliance
Motor Protector (Auto-reset), Pressure Switch (Auto-reset)
INTERIOR LIGHT
TRAYSLIDE
WEIGHT
PACKAGE
100V 40W
Gastronorm-Bleche Hotel Pan Trayslide x 16
Net weight 204kg / Gross weight 247kg
Carton (Wooden Pallet) 1470mm(W) x 920mm(D) x 2130mm(H)
OPERATING CONDITIONS Ambient Temp.: 5 - 43°C
Voltage Range: Rated voltage ±10%
* Theelectricalpropertiesarebasedonmeasurementsatambienttemperatureof43°CaccordingtotheTechnical
Requirements for Electrical Appliances.
** We reserve the right to make changes in specifications and design without prior notice.

7
[c] HFE-70A(-UK)
AC SUPPLY VOLTAGE *
POWER SUPPLY CAPACITY *
AMPERAGE *
STARTING AMPERAGE *
ELECTRIC CONSUMPTION (RATED) *
POWER FACTOR *
HEAT REJECTION
1 Phase 230V 50Hz
1.16kVA (5.02A)
3.87A
14.8A
675W (Except Drain Pan Heater 250W)
Heater: 550W Defrost: 550W
73%
735W
PULLDOWN TIME (10°C to 0°C)
SATURATION TEMPERATURE 26 min. (Ambient Temp. 43°C, No Load) Approx. -24°C (Ambient Temp. 43°C, No Load)
STORAGE CAPACITY
OUTSIDE DIMENSIONS
INSIDE DIMENSIONS
EXTERIOR
INTERIOR
INSULATION
644L
700mm(W) x 850mm(D) x 2100mm(H)
580mm(W) x 688mm(D) x 1533mm(H)
Stainless Steel, Galvanized Steel (Top, Rear)
Stainless Steel
Polyurethane Foam
AIR CIRCULATION
DEFROST SYSTEM
DEFROST DRAIN SYSTEM
Forced Air Interior Fan 4W x 2
Heater
Heater, Forced Evaporation
COMPRESSOR
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
Hermetic Model SC12CL
Fin and Tube Type (9 tubes high 4 rows deep), Fan Motor 4P 8W
Fin and Tube Type (4 tubes high 8 rows deep)
Capillary Tube 1.0mm DIA x 2.0mm DIA x 3000mm long
R404A 270g
CABINET TEMPERATURE CONTROL
DEFROST CONTROL
Microprocessor (Digital Temperature Indication)
Adjustable from -25 to -7°C
Microprocessor
ELECTRIC CIRCUIT PROTECTION
COMPRESSOR PROTECTION
Ground Fault Interrupter (with Overcurrent Protector)
Class I Appliance
Motor Protector (Auto-reset), Pressure Switch (Auto-reset)
INTERIOR LIGHT
TRAYSLIDE
WEIGHT
PACKAGE
100V 40W
Gastronorm-Bleche Hotel Pan Trayslide x 8
Net weight 141kg / Gross weight 169kg
Carton (Wooden Pallet) 770mm(W) x 920mm(D) x 2130mm(H)
OPERATING CONDITIONS Ambient Temp.: 5 - 43°C
Voltage Range: Rated voltage ±10%
* Theelectricalproperties are basedon measurementsatambient temperature of 43°Caccording tothe Technical
Requirements for Electrical Appliances.
** We reserve the right to make changes in specifications and design without prior notice.

8
[d] HFE-140A(-UK)
AC SUPPLY VOLTAGE *
POWER SUPPLY CAPACITY *
AMPERAGE *
STARTING AMPERAGE *
ELECTRIC CONSUMPTION (RATED) *
POWER FACTOR *
HEAT REJECTION
1 Phase 230V 50Hz
1.27kVA (5.86A)
4.45A
20.0A
948W (Except Drain Pan Heater 250W)
Heater: 767W Defrost: 767W
85%
1330W
PULLDOWN TIME (10°C to 0°C)
SATURATION TEMPERATURE 30 min. (Ambient Temp. 43°C, No Load) Approx. -22°C (Ambient Temp. 43°C, No Load)
STORAGE CAPACITY
OUTSIDE DIMENSIONS
INSIDE DIMENSIONS
EXTERIOR
INTERIOR
INSULATION
1407L
1400mm(W) x 850mm(D) x 2100mm(H)
1280mm(W) x 688mm(D) x 1533mm(H)
Stainless Steel, Galvanized Steel (Top, Rear)
Stainless Steel
Polyurethane Foam
AIR CIRCULATION
DEFROST SYSTEM
DEFROST DRAIN SYSTEM
Forced Air Interior Fan 4W x 3
Heater
Heater, Forced Evaporation
COMPRESSOR
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
Hermetic Model SC18CL
FinandTube Type(9 tubeshigh 3rowsdeep), Fan Motor 4P8Wx 2
Fin and Tube Type (4 tubes high 8 rows deep)
Capillary Tube 1.2mm DIA x 2.4mm DIA x 2500mm long
R404A 350g
CABINET TEMPERATURE CONTROL
DEFROST CONTROL
Microprocessor (Digital Temperature Indication)
Adjustable from -25 to -7°C
Microprocessor
ELECTRIC CIRCUIT PROTECTION
COMPRESSOR PROTECTION
Ground Fault Interrupter (with Overcurrent Protector)
Class I Appliance
Motor Protector (Auto-reset), Pressure Switch (Auto-reset)
INTERIOR LIGHT
TRAYSLIDE
WEIGHT
PACKAGE
100V 40W
Gastronorm-Bleche Hotel Pan Trayslide x 16
Net weight 212kg / Gross weight 255kg
Carton (Wooden Pallet) 1470mm(W) x 920mm(D) x 2130mm(H)
OPERATING CONDITIONS Ambient Temp.: 5 - 43°C
Voltage Range: Rated voltage ±10%
* Theelectricalproperties are basedon measurementsatambient temperature of 43°Caccording tothe Technical
Requirements for Electrical Appliances.
** We reserve the right to make changes in specifications and design without prior notice.

9
5. DIMENSIONS
[a] HRE-70A(-UK)

10
[b] HRE-140A(-UK)

11
[c] HFE-70A(-UK)

12
[d] HFE-140A(-UK)

13
II. TECHNICAL INFORMATION
1. WIRING DIAGRAM
[a] HRE-70A(-UK) [Auxiliary Code: Before F-1]

14
[b] HRE-70A(-UK) [Auxiliary Code: From F-1]

15
[c] HRE-140A(-UK) [Auxiliary Code: Before F-1]

16
[d] HRE-140A(-UK) [Auxiliary Code: From F-1]

17
[e] HFE-70A(-UK) [Auxiliary Code: Before F-1]