Hoshizaki HNC-120AA-L User manual

NO. 74NA-574
ISSUED: AUG. 10, 2001
REVISED:
HOSHIZAKI
COUNTER SHOWCASE
MODEL HNC-120AA-L/R
HNC-150AA-L/R
HNC-180AA-L/R
HNC-210AA-L/R
SERVICE MANUAL

74NA5740108
CONTENTS PAGE
1. SAFETY INSTRUCTIONS ------------------------------------------------------------------------- 1
2. MODEL NAME --------------------------------------------------------------------------------------- 3
3. OPERATING INSTRUCTIONS -------------------------------------------------------------------- 4
4. SPECIFICATIONS ---------------------------------------------------------------------------------- 5
5. DIMENSIONS ---------------------------------------------------------------------------------------- 6
[a] HNC-120AA-L ----------------------------------------------------------------------------------- 6
[b] HNC-120AA-R ----------------------------------------------------------------------------------- 7
[c] HNC-150AA-L ----------------------------------------------------------------------------------- 8
[d] HNC-150AA-R ----------------------------------------------------------------------------------- 9
[e] HNC-180AA-L ---------------------------------------------------------------------------------- 10
[f] HNC-180AA-R ---------------------------------------------------------------------------------- 11
[g] HNC-210AA-L ---------------------------------------------------------------------------------- 12
[h] HNC-210AA-R ---------------------------------------------------------------------------------- 13
6. REFRIGERATION CIRCUIT ---------------------------------------------------------------------- 14
7. WIRING DIAGRAM --------------------------------------------------------------------------------- 15
8. CONSTRUCTION ---------------------------------------------------------------------------------- 16
9. REMOVAL AND REPLACEMENT ------------------------------------------------------------- 17
[a] SIDE COVER ----------------------------------------------------------------------------------- 17
[b] TOP COVER ------------------------------------------------------------------------------------ 17
[c] COVER - UNIT ---------------------------------------------------------------------------------- 17
[d] FRONT GLASS--------------------------------------------------------------------------------- 17
[e] SIDE FRAME ----------------------------------------------------------------------------------- 18
[f] CENTER FRAME ------------------------------------------------------------------------------ 18
[g] HOLDER - EVAPORATOR PIPE -----------------------------------------------------------18
[h] CONTROL BOX -------------------------------------------------------------------------------- 18
[i] UNIT ----------------------------------------------------------------------------------------------- 19
10. REFRIGERANT SERVICE INFORMATION -------------------------------------------------- 20
11. CONSTANT PRESSURE EXPANSION VALVE AND REFRIGERANT CHARGE -- 21
[a] SPECIFICATIONS ----------------------------------------------------------------------------- 21
[b] FUNCTION--------------------------------------------------------------------------------------- 21
[c] CONSTRUCTION ------------------------------------------------------------------------------ 21
[d] REPLACEMENT ------------------------------------------------------------------------------- 22
12. SERVICE DIAGNOSIS --------------------------------------------------------------------------- 23

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1. SAFETY INSTRUCTIONS
The following instructions contain important safety precautions and should be strictly observed.
The terms used here are defined as follows:
WARNING: There is a possibility of death or serious injury for 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 for 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
affect the environment.
(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) When unbrazing the refrigeration circuit connections, check that the circuit is completely
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
refrigerant may produce a poisonous gas when coming in contact with an open flame.
(7) Before servicing, check the surface temperature of the refrigeration circuit to prevent
a burn.

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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) Always use service parts intended for the applicable model for replacement of defective
parts. Use proper tools to secure the wiring. Otherwise abnormal operation or trouble
may occur and cause electric leaks or fire.
(3) Check for proper part installations, wiring conditions and soldered or solderless terminal
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 (DC500V) 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, always check for proper operation.

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2. MODEL NAME
H NC - 120 A A - R/L
High Grade Unit Location
R: Unit on right
L: Unit on left
Counter Showcase
HA model
Width (cm) Development Order
120, 150, 180, 210 Starts from A
Unit on right
Unit on left

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3. OPERATING INSTRUCTIONS
IMPORTANT
Hoshizaki Counter Showcase is intended for temporary food display.
Constructed with much glass, this showcase gives relatively insufficient heat
insulation and poor cooling performance compared with refrigerators in general.
For safe and efficient operation, be sure to follow the instructions below.
1) Do not leave foods in the showcase after service hours, or they may dry or spoil. Foods
that should not dry must be covered or wrapped up in a plastic film.
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 temp. is too low For more intensive cooling
8) The maximum safe height for displaying food products is 3.5” (9cm) above the interior
bottom. Food products should not be placed above this height as they may not remain
cold enough to avoid spoilage.

4. SPECIFICATIONS
MODEL HNC-120AA-L
-R HNC-150AA-L -R HNC-180AA-L -R HNC-210AA-L -R
ACSUPPLYVOLTAGE
POWERSUPPLY CAPACITY
RATEDAMPERAGE
STARTINGAMPERAGE
ELECTRICCONSUMPTION
POWERFACTOR
1Phase 115V 60Hz
0.47kVA(4.7A)
3.0A
13A
195W
56%
PULLDOWN TIME(10°C)
SATURATIONTEMPERATURE Approx. 40min. (AmbientTemp. 27°C,No Load) Approx.4°C (AmbientTemp. 27°C,No Load)
NETCAPACITY 42 L57L 72L 87 L
1200mm 1500 mm 1800mm 2100 mm
EXTERIORDIMENSIONS (W)
(D)
(H)
345mm
280mm
845mm 1145 mm 1445mm 1745 mm
INTERIORDIMENSIONS (W)
(D)
(H)
288mm (bottom)
157mm
EXTERIOR
INTERIOR
INSULATION
Glass, ABSPlastic, PVC Plastic,GalvanizedSteel
Glass, ABSPlastic, Stainless Steel
PolyurethaneFoam
REFRIGERATIONSYSTEM
DEFROSTSYSTEM Convection Cooling None
Hermetic130W Model CE56Y-1ZU
Fin and Tube Type, CoolingFan Motorx 1
(UPPER) Bare Tube Type, (LOWER) Pipe onSheet Type
ConstantPressure ExpansionValve
COMPRESSOR
CONDENSER
EVAPORATOR
REFRIGERANTCONTROL
REFRIGERANT TYPE/ CHARGE R134a/ 130g R134a /150 g R134a/ 180gR134a /200 g
ELECTRICCIRCUIT PROTECTION
COMPRESSORPROTECTION Ground FaultCircuit Interrupter, GroundWire MotorProtector
SLIDINGDOOR 2 pcs. 4pcs.
NETWEIGHT / GROSSWEIGHT 30 kg/ 37kg 36 kg/ 45kg 42kg /53 kg 48kg /61 kg
PACKAGE Carton
1280mm 1580 mm 1880mm 2180 mm
SHIPPINGDIMENSIONS (W)
(D)
(H)
413mm
405mm
CERTIFICATION To beNSFand ULcertified
3pcs. 4 pcs. 5pcs. 6 pcs.
ACCESSORIES FOODMOUNT
PLUG
VINYLHOSE
JOINT
4pcs.
1pc.
2pcs.
AMBIENTTEMP.
VOLTAGEVARIATION 10 -27°C Ratedvoltage ±10%
*The electrical specifications were determined at an ambient temperature of 27°C according to the electrical appliance
technicalstandards.
*The pull down timeandsaturationtemperature were measured 20mmabovethe food mount (normalposition)located
attheinteriorbottomcenter.
*Thefoodtemperatureiscontrollablebyturningoverthefoodmounts.
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5. DIMENSIONS
[a] HNC-120AA-L

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[b] HNC-120AA-R

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[c] HNC-150AA-L

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[d] HNC-150AA-R

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[e] HNC-180AA-L

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[f] HNC-180AA-R

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[g] HNC-210AA-L

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[h] HNC-210AA-R

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6. REFRIGERATION CIRCUIT
Refrigerant: R134a
Heat Exchange
Condenser
Drier
Expansion
Valve
Evaporator
(Upper)
Evaporator
(Lower)
Fan Motor
Compressor

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7. WIRING DIAGRAM
CM Compressor
SR Start Relay
SC Start Capacitor
OL Overload Relay
FM Fan Motor
ELB Ground Fault Circuit Interrupter
Power Supply 1 phase 115V 60Hz
BK W
BK W
BU

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8. CONSTRUCTION
Sliding Door
Food Mount
Cover - Unit
Side Cover
Side Frame
Top Cover
Unit
Evaporator Pipe
Front Glass
Holder - Evaporator Pipe Center Frame
Louver
Ground Fault
Circuit Interrupter
Control Box

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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 Cap from the Side Cover, the machine screw inside and the two machine screws
(black) at the bottom.
[b] TOP COVER
Remove the Sliding Door and Side Cover.
1) The Top Cover is hooked and fixed on the
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 with care
to avoid injury. To replace, reverse the removal
procedure.
[c] COVER - UNIT
Remove the Sliding Door, Side Cover and Top
Cover. Remove the two machine screws
securing the top of the Cover - Unit, and take off
the Cover.
[d] FRONT GLASS
Remove the Sliding Door, Side Cover, Top Cover
and Cover - Unit. Remove the Holder - Frame
secured on the Top Frame with machine screws.
Lift the Front Glass off the bottom fit.
The side interior of the Front Glass is sealed with
silicone sealant (black). Be sure to re-seal it at
replacement.
Top Cover
①
②
③
Top Frame
Fig. 1
Fig. 2
Gasket Holder - Frame
Top Frame
Front Glass

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[e] 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
Frame off the bottom fit.
[f] 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 Frame
and release it from the fit.
[g] HOLDER - EVAPORATOR PIPE
Remove the truss head tapping screw (4 x 25)
from the bottom. 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.
[h] CONTROL BOX
Remove the two machine screws indicated. Pull
out the Control Box.
Fig. 3
Fig. 5
Fig. 4
Truss Head Tapping
Screw 4 x 5
Truss Head Tapping
Screw 4 x 10
Holder -
Evaporator Pipe
Evaporator Pipe