NO.
S041-789
ISSUED: OCT. 26, 2009
JAN. 28, 2014
HOSHIZAKI
COUNTER SHOWCASE
MODEL
HNC-120BA-L/R-S
HNC-150BA-L/R-S
HNC-180BA-L/R-S
HNC-210BA-L/R-S
SERVICE MANUAL
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IMPORTANT
This manual should be read carefully before the showcase is serviced or
maintenance operations are performed. Only qualified service technicians
should install, service, and maintain the showcase. Read the warnings contained
in this booklet carefully as they give important information regarding safety.
Please retain this booklet for any further reference that may be necessary.
PAGE
CONTENTS
1. SAFETY INSTRUCTIONS----------------------------------------------------------------------------1
2. MODEL NAME-------------------------------------------------------------------------------------------3
3. OPERATING INSTRUCTIONS----------------------------------------------------------------------4
4. SPECIFICATIONS--------------------------------------------------------------------------------------5
5. DIMENSIONS--------------------------------------------------------------------------------------------7
[a] HNC-120BA-L-S ------------------------------------------------------------------------------------7
[b] HNC-120BA-R-S------------------------------------------------------------------------------------8
[c] HNC-150BA-L-S ------------------------------------------------------------------------------------9
[d] HNC-150BA-R-S---------------------------------------------------------------------------------- 10
[e] HNC-180BA-L-S -----------------------------------------------------------------------------------11
[f] HNC-180BA-R-S---------------------------------------------------------------------------------- 12
[g] HNC-210BA-L-S ---------------------------------------------------------------------------------- 13
[h] HNC-210BA-R-S---------------------------------------------------------------------------------- 14
6. REFRIGERATION CIRCUIT ----------------------------------------------------------------------- 15
7. WIRING DIAGRAM----------------------------------------------------------------------------------- 16
8. CONSTRUCTION------------------------------------------------------------------------------------- 18
9. REMOVAL AND REPLACEMENT ---------------------------------------------------------------- 19
[a] SIDE COVER-------------------------------------------------------------------------------------- 19
[b] TOP COVER--------------------------------------------------------------------------------------- 19
[c] FRONT GLASS ----------------------------------------------------------------------------------- 19
[d] SIDE FRAME -------------------------------------------------------------------------------------- 20
[e] CENTER FRAME--------------------------------------------------------------------------------- 20
[f] HOLDER - EVAPORATOR PIPE ------------------------------------------------------------- 20
[g] UNIT ------------------------------------------------------------------------------------------------- 20
10. REFRIGERANT SERVICE INFORMATION --------------------------------------------------- 21
i
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11. CONSTANT PRESSURE EXPANSION VALVE AND REFRIGERANT CHARGE---- 22
[a] SPECIFICATIONS-------------------------------------------------------------------------------- 22
[b] FUNCTION----------------------------------------------------------------------------------------- 22
[c] CONSTRUCTION -------------------------------------------------------------------------------- 22
[d] REPLACEMENT---------------------------------------------------------------------------------- 23
12. SERVICE DIAGNOSIS------------------------------------------------------------------------------ 24
ii
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1. SAFETY INSTRUCTIONS
The following instructions contain important safety precautions and should be strictly
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a third party or the user due to improper service operations or defects in
serviced products.
CAUTIONꢂꢁ
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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
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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.
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(1) Be sure to recover the refrigerant. Do not discharge it into the atmosphere. It will
affect the environment.
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vicinity.
(4) When unbrazing the refrigeration circuit connections, check that the circuit is
completely evacuated. The refrigerant may produce a poisonous gas when coming
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(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
refrigerant may produce a poisonous gas when coming in contact with an open
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(7) Before servicing, check the surface temperature of the refrigeration circuit to
prevent a burn.
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(1) Check for proper grounding connections, and repair if necessary to prevent electric
shocks.
(2) Always use service parts intended for the applicable model for replacement
of defective parts. Use proper tools to secure the wiring. Otherwise abnormal
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(3) Check for proper part installations, wiring conditions and soldered or solderless
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(4) Be sure to replace damaged or deteriorated power cords and lead wires to prevent
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(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
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(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
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(1) Check for water leaks in the water supply and drain pipes to prevent damage to the
vicinity including household effects.
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(3) Be sure to reassemble the parts completely. Loose assembly of such parts as
control box cover may cause entrance of vermins resulting in a short circuit
between terminals and possible ignition.
2
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2. MODEL NAME
H NC - 120 B A - L/R - S
High Grade
Exterior
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Counter Showcase
Unit Location
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Development Order
Starts from A
HA model
3
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3. OPERATING INSTRUCTIONS
IMPORTANT
Hoshizaki Counter Showcase is intended for temporary food display.
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insulation and poor cooling performance compared with refrigerators in general.
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1) Do not leave foods in the showcase after service hours, or they may dry or spoil. Foods
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2) Store only pre-refrigerated items in the showcase. It takes longer for foods to cool in the
showcase than in a refrigerator.
3) Do not leave the doors open or open them too frequently. The interior temperature may
rise, resulting in food deterioration.
4) Do not pack the showcase with foods. The cooling performance may reduce, resulting in
food deterioration.
5) The showcase should not be exposed to direct sunlight or located next to ovens, grills
or other high heat producing equipment. The interior temperature may rise, resulting in
food deterioration.
6) The ambient temperature should not exceed 80°F (27°C). The cooling performance may
reduce, resulting in food deterioration.
7) The food mount can be used on either side. The food temperature is controllable by
turning over the food mount to change the distance from the interior bottom.
Normal condition
When food temperature is too low
For more intensive cooling
8) The maximum safe height for displaying food products is 3.5” (9 cm) above the interior
bottom. Food products should not be placed above this height as they may not remain
cold enough to avoid spoilage.
4
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4. SPECIFICATIONS
Auxiliary code: C0 or earlier
MODEL
HNC-120BA-L-S HNC-150BA-L-S HNC-180BA-L-S HNC-210BA-L-S
-R-S -R-S -R-S -R-S
L: S041 L: S043 L: S045 L: S047
R: S044 R: S046 R: S048
60Hz
PRODUCT CODE
R: S042
1 Phase 115V
0.47kVA (4.7A)
3.2A
AC SUPPLY VOLTAGE
POWER SUPPLY CAPACITY
RATED AMPERAGE
STARTING AMPERAGE
ELECTRIC CONSUMPTION
POWER FACTOR
13A
195W
56%
Measured 20 mm above the
food mount(normal position)
located at the interior bottom
center
PULL DOWN TIME (10°C)
SATURATION TEMPERATURE
Approx. 30 min.(Ambient Temp. 27°C, No Load)
Approx. 4°C(Ambient Temp. 27°C, No Load)
NET CAPACITY
42 L
57 L
72 L
87 L
1200 mm
1500 mm
1800 mm
2100 mm
EXTERIOR DIMENSIONS
(W)
(D)
(H)
345 mm
270 mm
845 mm
1145 mm
1445 mm
1745 mm
INTERIOR DIMENSIONS
(W)
(D)
(H)
288 mm (bottom)
157 mm
Glass, ABS Plastic, PVC Plastic, Stainless Steel
Glass, ABS Plastic, Stainless Steel
Polyurethane Foam
EXTERIOR
INTERIOR
INSULATION
DRAWING NO. (DIMENSIONS)
L㸸D04762
R㸸D04763
Convection Cooling
None
L㸸D04764
R㸸D04765
L㸸D04766
R㸸D04767
L㸸D04768
R㸸D04769
REFRIGERATION SYSTEM
DEFROST SYSTEM
COMPRESSOR
Hermetic 130W
Model CE56Y-1ZU
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
Fin and Tube Type, Cooling Fan Motor x 1
(UPPER) Bare Tube Type, (LOWER) Pipe on Sheet Type
Constant Pressure Expansion Valve
REFRIGERANT TYPE / CHARGE
ELECTRIC CIRCUIT PROTECTION Ground Fault Circuit Interrupter, Ground Wire
R134a / 110 g
R134a / 130 g
R134a / 160 g
R134a / 180 g
COMPRESSOR PROTECTION
SLIDING DOOR
Motor Protector
2 pcs.
4 pcs.
NET WEIGHT / GROSS WEIGHT
PACKAGE
32 kg / 39 kg
Carton
1300 mm
430 mm
473 mm
To be NSF and UL certified
3 pcs. 4 pcs.
37 kg / 46 kg
1600 mm
42 kg / 53 kg
47 kg / 60 kg
2200 mm
SHIPPING DIMENSIONS
(W)
1900 mm
5 pcs.
(D)
(H)
CERTIFICATION
6 pcs.
ACCESSORIES
AMBIENT TEMP.
FOOD MOUNT
VINYL HOSE
JOINT
1 pc.
2 pcs.
10 - 27°C
VOLTAGE VARIATION
Rated voltage ±10%
* The electrical specifications were determined at an ambient temperature of 27°C according to the electrical
appliance technical standards.
* The food temperature is controllable by turning over the food mounts.
5
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Auxiliary code: C1 or later
MODEL
HNC-120BA-L-S HNC-150BA-L-S HNC-180BA-L-S HNC-210BA-L-S
-R-S -R-S -R-S -R-S
L: s041 L: s043 L: s045 L: s041
R: S042 R: s046
1 Phase
PRODUCT CODE
R: s044
60Hz
R: s042
AC SUPPLY VOLTAGE
POWER SUPPLY CAPACITY
RATED AMPERAGE
115V
0.44kVA (3.9A)
2.4A
STARTING AMPERAGE
ELECTRIC CONSUMPTION
POWER FACTOR
15A
175W
63%
PULL DOWN TIME (10°C)
SATURATION TEMPERATURE
Approx. 30 min. (Ambient Temp. 27°C, No Load)
Approx. 4°C (Ambient Temp. 27°C, No Load)
Measured 20mm above
the food mount (normal
position) located at the
interior bottom center
72 L 87 L
NET CAPACITY
42 L
57 L
EXTERIOR DIMENSIONS
(W)
1200 mm
1500 mm
1800 mm
2100 mm
(D)
(H)
345 mm
270 mm
845 mm
288 mm (bottom)
157 mm
INTERIOR DIMENSIONS
(W)
(D)
(H)
1145 mm
1445 mm
1745 mm
EXTERIOR
INTERIOR
INSULATION
Glass, ABS Plastic, PVC Plastic, Stainless Steel
Glass, ABS Plastic, Stainless Steel
Polyurethane Foam
DRAWING NO. (DIMENSIONS)
L: D04762
R: D04763
L: D04764
R: D04765
L: D04766
R: D04767
L: D04768
R: D04769
REFRIGERATION SYSTEM
DEFROST SYSTEM
COMPRESSOR
Convection Cooling
None
Hermetic 110W
Model FL1152-PD
CONDENSER
Fin and Tube Type, Cooling Fan Motor x 1
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT TYPE / CHARGE
(UPPER) Bare Tube Type, (LOWER) Pipe on Sheet Type
Constant Pressure Expansion Valve
R134a / 95 g
R134a / 115 g
R134a / 145 g
R134a / 165 g
ELECTRIC CIRCUIT PROTECTION
COMPRESSOR PROTECTION
SLIDING DOOR
Ground Fault Circuit Interrupter, Ground Wire
Motor Protector
2 pcs.
4 pcs.
NET WEIGHT / GROSS WEIGHT
PACKAGE
SHIPPING DIMENSIONS
35 kg / 42 kg
Carton
1300 mm
430mm
473 mm
To be NSF and UL certified
3 pcs. 4 pcs.
40 kg / 49 kg
45 kg / 56 kg
50 kg / 63 kg
2200 mm
(W)
(D)
(H)
1600 mm
1900 mm
CERTIFICATION
ACCESSORIES
FOOD MOUNT
VINYL HOSE
JOINT
5 pcs.
6 pcs.
1 pc.
2 pcs.
AMBIENT TEMP.
10 - 27°C
VOLTAGE VARIATION
Rated voltage ±10%
* The electrical specifications were determined at an ambient temperature of 27°C according to the electrical
appliance technical standards.
* The food temperature is controllable by turning over the food mounts.
6
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5. DIMENSIONS
[a] HNC-120BA-L-S
7
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[b] HNC-120BA-R-S
8
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[c] HNC-150BA-L-S
9
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10
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6. REFRIGERATION CIRCUIT
denser
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15
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7. WIRING DIAGRAM
Auxiliary code: C0 or earlier
CM Compressor
SR Start Relay
SC Start Capacitor
OL Overload Relay
FM Fan Motor
ELB Ground Fault Circuit Interrupter
16
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Auxiliary code: C1 or later
BK
W
Power Suppy 1 phase 115V 60Hz
W
BK
GR / Y
㧳
BK
W
BU
㧮
CM Compressor
SR Start Relay
SC Start Capacitor
OL Overload Relay
FM Fan Motor
ELB Ground Fault Circuit Interrupter
17
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8. CONSTRUCTION
Top Cover
18
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9. REMOVAL AND REPLACEMENT
CAUTION
1. Be sure to unplug the showcase before removing or replacing the parts.
2. Handle the glass parts with care.
[a] SIDE COVER
Remove the two machine screws at the
bottom, lift up the side cover, and unhook
the top.
[b] TOP COVER
Remove the sliding door and side cover.
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top frame (aluminum).
2) Lift up and unhook the rear end of the top
cover.
3) When the rear part is lifted off, move it
forward to unhook and remove the front
part.
The top cover is tightly hooked on the top
frame and will not come off easily. Remove it
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the removal procedure.
Fig. 1
[c] FRONT GLASS
Remove the sliding door, side cover and top
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The bottom and side interior of the front
glass is sealed with silicone sealant (black).
Be sure to re-seal it at replacement.
Fig. 2
19
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[d] SIDE FRAME
Remove the sliding door, side cover and top cover. Unbind the wiring on the side frame.
Remove the two screws securing the top frame and the top of the side frame. Lift the side
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[e] CENTER FRAME (Except HNC-120 type)
Remove the two flat head machine screws
(black) securing the center frame to the rear
and the two machine screws securing the
center frame to the top frame. Tilt the center
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Fig. 3
Truss Head Tapping
[f] HOLDER - EVAPORATOR PIPE
Remove the truss head tapping screw (4 x 25)
from the bottom of the top frame. Take off the
center frame. Be careful with the evaporator
pipe. It will be released and hang down.
Remove the truss head tapping screw (4 x 10)
from the bottom of the top frame.
Ev
Truss
Screw
Fig. 4
Outlet Pipe
Expansion Valve
[g] UNIT
Remove the sliding door, side cover, top
cover, top frame and side frame. Take off
the compressor terminal cover and remove
the starter and motor protector. Uninsulate
the expansion valve and unbraze the outlet
pipe with a gas burner (see “11. CONSTANT
PRESSURE EXPANSION VALVE AND
REFRIGERANT CHARGE”).
Joint
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machine screws securing the unit base. The
whole unit can be pulled out.
Fig. 5
20
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10. REFRIGERANT SERVICE INFORMATION
1) Allowable Compressor Opening Time and Prevention of Lubricant Mixture [R134a]
The compressor must not be opened more than 30 minutes in replacement or service. Do
not mix lubricants of different compressors even if both are charged with R134a, except
when they uses the same lubricant.
2) Treatment for Refrigerant Leak [R134a]
If a refrigerant leak occurs in the low side of a showcase charged with R134a, air may
be drawn in. Even if the low side pressure is higher than the atmospheric pressure in
normal operation, a continuous refrigerant leak will eventually lower the low side pressure
below the atmospheric pressure and will cause air suction. Air contains a large amount of
moisture, and ester easily absorbs a lot of moisture. If a showcase charged with R134a
has possibly drawn in air, the drier must be replaced. Be sure to use a drier designed for
R134a.
3) Handling of Handy Flux [R134a]
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that has been used for the current refrigerants. However, its entrance into the refrigerant
circuit should be avoided as much as possible.
4) Oil for Processing of Copper Tubing [R134a]
When processing the copper tubing for service, wipe off oil, if any used, by using alcohol
or the like. Do not use too much oil and let it into the tubing, or wax contained in the oil will
clog the capillary tubing.
5) Service Parts for R134a
Some parts used for refrigerants other than R134a are similar to those for R134a. But
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the refrigerant have not been evaluated. Also, for R134a, do not use any parts that have
been used for other refrigerants. Otherwise, wax and chlorine remaining on the parts may
adversely affect R134a.
6) Replacement Copper Tubing [R134a]
The copper tubes currently in use are available for R134a. But do not use them if oily
inside. The residual oil in copper tubes should be as little as possible. (Low residual oil
type copper tubes are used in the shipped units.)
7) Evacuation, Vacuum Pump and Refrigerant Charge [R134a]
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pump may be the same as those for the current refrigerants. However, the rubber hose
21
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and gauge manifold to be used for evacuation and refrigerant charge should be exclusively
for R134a.
8) Refrigerant Leak Check
Refrigerant leaks can be detected by charging the unit with a little refrigerant, raising the
pressure with nitrogen and using an electric detector. Do not use air or oxygen instead of
nitrogen for this purpose, or rise in pressure as well as in temperature may cause R134a to
suddenly react with oxygen and explode. Be sure to use nitrogen to prevent explosion.
11. CONSTANT PRESSURE EXPANSION VALVE AND REFRIGERANT
CHARGE
[a] SPECIFICATIONS
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[b] FUNCTION
When the low side pressure drops, the Constant Pressure Expansion Valve opens and lets
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[c] CONSTRUCTION
IN (High Pressure)
$GMXVWLQJ
Screw
Needle Valve
Cap
OUT (Low Pressure)
Close
Open
UP
Inner Spring
DOWN
Working
Bar
$GMXVWLQJ
Spring
Low Pressure
Diaphragm
Fig. 6
22
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[d] REPLACEMENT
WARNING
Always protect the valve body by using a damp cloth to prevent the valve from
overheating. Do not braze with the valve body exceeding 230°F (110°C).
IMPORTANT
Always install a new Drier every time the sealed refrigeration system is
opened. Do not replace the Drier until after all other repairs or replacement
have been made.
1) Recover the refrigerant (R134a) and store it in an approved container.
2) Remove the Insulation Cover and Cap from the Expansion Valve.
3) Remove the Expansion Valve by heating the Inlet and Outlet Pipes with a gas burner.
Wet Cloth
Evaporator
Burner
Burner
Drier
Fig. 7
23
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12. SERVICE DIAGNOSIS
PROBLEM
POSSIBLE CAUSE
REMEDEY
[1] Showcase will not 1. Ground fault circuit interrupter in 1. Turn ON.
start.
OFF position.
2. Unplugged.
2. Plug in.
3. Supply voltage too low.
3. Plug into a separate receptacle of
115V ± 10%.
4. No power supply to the wall outlet. 4. Correct.
(Breaker or fuse blown out.)
5. Electrical circuit open or bad
contacts.
5. Correct.
6. Motor protector tripped.
1. Gas leaks.
2. Fan motor defective.
6. Ventilate and reset fan motor.
1. Repair the leaks and recharge.
2. Replace.
[2] Poor cooling
performance
ꢉꢀꢁ&RQGHQVHUꢁDQGꢐRUꢁDLUꢁ¿OWHUꢁFORJJHGꢀ 3. Clean.
4. Condenser air inlet blocked.
5. Exposed to direct sunlight.
6. Located next to a high heat
producing equipment.
4 - 9. Instruct the user on
characteristics and proper use
of the showcase.
7. Doors opened too frequently or left
open.
8. Packed with foods, or warm or hot
foods inside.
9. Ambient temperature exceeding 80
°F (27°C).
[3] Dry foods
[4] Frosting
1. Foods have been stored from the 1 - 2. Instruct the user on
previous day.
characteristics and proper use
of the showcase.
2. Foods have been stored for a long
time.
1. [Exterior] Relative humidity
exceeding 60%.
2. [Interior] Doors opened too
frequently or left open.
1 - 2. Instruct the user on
characteristics and proper
use of the showcase. Wipe off
excessive frost with a soft cloth.
24
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