Service Manual
Contents
1. 7 b HNC 120BA R S 8 c HNC 150BA L S TY 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 e enne nen ne nnn nn 16 8 CONSTRUCTION 18 9 REMOVAL AND REPLACEMENT cence 19 a SIDE VER 19 b TOP COVER nnee 19 c FRONT GLASS 19 d SIDE FRAME ecien eeaeee Eeee EEES 20 e CENTER FRAME 20 f HOLDER EVAPORATOR PIPE nm 20 g UNIT PTT YC I OOPFOY T CaHEP M 20 10 REFRIGERANT SERVICE INFORMATION SS s q 21 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 ma2. PACKAGE SHIPPING DIMENSIONS 430 mm 473 mm ACCESSORIES FOOD MOUNT VINYL HOSE 1 pc JOINT 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 Auxiliary code C1 or later MODEL HNC 120BA L S HNC 150BA L S HNC 180BA L S HNC 210BA L S PRODUCT CODE L s041 L 5043 L 5045 L s041 RON sa au Ks mata AC SUPPLY VOLTAGE Phase 115V POWER SUPPLY CAPACITY 0 44kVA 3 9A RATED AMPERAGE 2 4A STARTING AMPERAGE 15A ELECTRIC CONSUMPTION 175W POWER FACTOR 63 PULL DOWN TIME 10 C Approx 30 min Ambient Temp 27 C No Load Measured 20mm above SATURATION TEMPERATURE Approx 4 C Ambient Temp 27 C No Load the food mount normal position located atthe interior bottom center NET CAPACITY EXTERIOR DIMENSIONS 345 mm INTERIOR DIMENSIONS 288 mm bottom 157 mm EXTERIOR Glass ABS Plastic PVC Plastic Stainless Steel INTERIOR Glass ABS Plastic Stainless Steel INSULATION Polyurethane Foam R D04763 R D04765 R D04767 R D04769 DEFROST SYSTEM None COMPRESSOR Hermetic 110W Model FL1152 P D CONDENSER Fin and Tube Type Cooling Fan Motor x 1 EVAPORATOR UPPER Bare Tube Type LOWER Pipe on Sheet Type REFRIGERANT CONTROL Constant Pressure Expansion Valve REFRIGERA
3. HOSHIZAKI COUNTER SHOWCASE MODEL HNC 120BA L HNC 150BA L HNC 180BA L HNC 210BA L SERVICE MANUAL IMPORTANT Only qualified service technicians should install service or maintain the product No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual Failure to service and maintain the equipment in accordance with this manual may adversely affect safety performance and warranty coverage Hoshizaki provides this manual primarily to assist qualified service technicians in the maintenance and service of the product Should the reader have any questions or concerns which have not been satisfactorily addressed please call write or send an e mail message to the Hoshizaki Technical Support Department for assistance HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Atin Hoshizaki Technical Support Department Phone 1 800 233 1940 Technical Support 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport hoshizaki com Web Site www hoshizaki com NOTE To expedite assistance all corresoondence communication MUST include the following information e Model Number e Serial Number Complete and detailed explanation of the problem CONTENTS PAGE 1 SAFETY INSTRUCTIONS ennen 1 2 MODEL NAME lll is aaa 3 3 OPERATING INSTRUCTIONS coronan 4 4 SPECIFICATIONS sonsaina cecene oseaan eniai 5 5 DIMENSIONS 7 a HNC 120BA L S
4. Auxiliary code CO or earlier Power Supply 1 phase 115V 60Hz CM Compressor SR Start Relay Start Capacitor OL Overload Relay FM Fan Motor Auxiliary code C1 or later Power Suppy 1 phase 115V 60Hz BK GR Y BK Q u LL a J ep H l V a 17 8 CONSTRUCTION Top Cover Nameplate Front Glass Plug Power S Gr witch ound Fault Interrupter Condenser Air Filter Louver Sliding Glass Door Food Mount 9 REMOVAL AND REPLACEMENT CAUTION 1 Be sure to unplug the showcase before removing or replacing the paris 2 Handle the glass paris 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 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 FRONT GLASS Remove the sliding door side cover and top cover Lift the front glass off the bottom fit The bottom and side interior of the front glass is sealed with silicone sealant black Be sure to re seal it at replacement 19 1 To
5. N3MOd qv3H MAUOS S Z LIE 10 MIA 201 INNOLLO3S 88c U ek D lt co 00 a O Z T O Qv3H MINIS S z OLE 3aIS AVIASIO ge VIH MINIS S E 0081 11 m HVAS V MIA DE 9Md d HLIM ANOD M3MOd Gee l 89 00 EE LIILNO NIVHO GO EE LIILNO NIVHQ HILIMS YAMOd LIE 807 802 Of MIA 3015 TVNOLLDIS IIS AVTASIA VIH MINOS S Z L8L VIH MIYIS SZ DIS Ss ST Y SA OLE 0081 12 hy QuIV3M V MIA 89 GEEL DE dO 1F1LNO Nivad ao COLIUNO Nivea ON ld d HUM q302 NIMOd H cc lt m i N d N3dO e 00 o O HOLMS Y3MOd L p 807 807 ZIE B fol NGIA 3GIS TYNOLLO1S 3diS AYIASIO Qv3H M3M2S s Z 2807 882 Qv3H MIYISISZ EL A 0012 Cava MIIA Of S891 89 NOS NIMOd ZEM a f vue HOLIMS 43MOd g HNC 210BA L S Or MIA JIS WNOILOJS Gals AVIdSIO 802 VIH MAHIS S Z dy NS DN NS RO Pps yo y SS OLE COLE 14 3v39 v MIA 89 S891 DE qo EE LIILNO NIVHQ GO EE LIILNO Nivud 907d d HLIM GH05 M3MOd ES N ell x Nido N3dO X S N3dO mE h HNC 210BA R S 6 REFRIGERATION CIRCUIT Expansion Valve Drier Evaporator Fan Motor Upper Condenser Evaporator Lower Compressor Heat Exchange Refrigerant R134a 15 7 WIRING DIAGRAM
6. interrupter in 1 Turn ON OFF position 2 Unplugged 2 Plug in PER ER Plug into a separate receptacle of 115V 10 Breaker or fuse blown out 5 Electrical circuit open or bad 5 Correct contacts 2 Fan motor defective JS Replace 4 Condenser air inlet blocked 4 9 Instruct the user on characteristics and proper use 6 Located next to a high heat of the showcase producing equipment 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 1 Foods have been stored from the Instruct the user on previous day characteristics and proper use 2 Foods have been stored for a long of the showcase time 1 Exterior Relative humidity Instruct the user on exceeding 60 characteristics and proper 2 Interior Doors opened too use of the showcase Wipe off frequently or left open excessive frost with a soft cloth 24
7. NT TYPE CHARGE ELECTRIC CIRCUIT PROTECTION Ground Fault Circuit Interrupter Ground Wire Caton PACKAGE Carton SHIPPING DIMENSIONS 1300 mm 1600 mm 1900 mm 2200 mm 430mm H 473 mm CERTIFICATION To be NSF and UL certified ACCESSORIES FOOD MOUNT VINYL HOSE 1 pc 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 5 DIMENSIONS a HNC 120BA L S M A 30IS WNOLLOAS 886 ZZ J UVAH MIHOS S Z 9M1d dE HLM J409 HIMOd 3015 AV1dSI9 0021 Cavau v MIA dO HNO Niega VIH MIH9S S Z b HNC 120BA R S MAIA 3915 IVNOILO3S 887 Qv3H MINOS S Z ao er 1I11NO NIVAQ NU 30IS AY1dSIA Uu uv3H v MIA qo ce 13710 NIVA EN NddO 9nd de HLIM YO NIMOd Qv3H MINOS S Z c HNC 150BA L S MAIA 201 INNOLLO3S UVAH MIYIS S Z D I 9Md d HUM A402 H1MOd Gals AV1dSId 00S HYANJY MAIA 801 GO EE LIILNO NIVHO a Nado dO EE LIILNO Nivea il VIH MINIS S T ae 89 HOLMS 43MOd LIE BSS US 855 d HNC 150BA R S M3IA 3015 WNOLLOAS IS UVAH MIYIS S Z 89 GO ee s3uno NIYHJ 3dIS Av 1dSIQ 0081 HVJAJYV MIA S801 do EE LIILNO Niva OS Ond d HLIM 0400
8. XPANSION VALVE AND REFRIGERANT CHARGE a SPECIFICATIONS Model HYP 2 5QHD 5 Manufacturer Fuji Koki Part Number 447283 04 Refrigerant R134a Adjustment Range 0 01 0 3MPa Pressure Rise by Adjusting Screw 0 039 0 049MPa turn b FUNCTION When the low side pressure drops the Constant Pressure Expansion Valve opens and lets the refrigerant flow to keep a constant pressure c CONSTRUCTION IN High Pressure __ Adjusting Cac Screw R d N 7 aay DE PENNE our tow pressure warap 45g LL A LL VII 77 y Needle Valve UP Working Inner Sprino Adjusting d Bar Low Pressure apung Diaphragm Fig 6 22 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 230 110 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 Fig 7 23 12 SERVICE DIAGNOSIS 1 Showcase will not Start 2 Poor cooling performance 3 Dry foods 1 Ground fault circuit
9. ed 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 never use any parts unless they are specified for R134a because their endurance against 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 Never allow the oil in the vacuum pump to flow backward The vacuum level and vacuum pump may be the same as those for the current refrigerants However the rubber hose 21 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 E
10. intain 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 11 CONSTANT PRESSURE EXPANSION VALVE AND REFRIGERANT CHARGE 22 a SPECIFICATION So Ee 22 lb FUNCTION ne 22 c CONSTRUCTION cence 22 d REPLACEMENT a 23 12 SERVICE DIAGNOSIS ee 24 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 producis 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 the unit must be energized for inspection of the electric circu
11. it use rubber gloves to avoid contact with any live paris 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 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 paris intended for the applicable model for replacement of defective paris 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 solderles
12. ooling 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 SPECIFICATIONS Auxiliary code CO or earlier D P R P R 5 R 5 L 5041 L 5043 L 5045 L S047 LLL MN SUPPLY VOLTAGE 1 Ae 115V 60Hz POWER SUPPLY CAPACITY 0 47kVA 4 7A RATED AMPERAGE 3 2A STARTING AMPERAGE 13A ELECTRIC CONSUMPTION 195W POWER FACTOR 56 PULL DOWN TIME 10 C Approx 30 min Ambient Temp 27 C No Load Measured 20 mm above the SATURATION TEMPERATURE Approx 4 C Ambient Temp 27 C No Load food mount normal position i located at the interior bottom i center NET CAPACITY EXTERIOR DIMENSIONS 1200 mm 1500 mm 1800 mm 2100 mm INTERIOR DIMENSIONS 1145 mm 1445 mm 1745 mm 288 mm bottom 157 mm EXTERIOR Glass ABS Plastic PVC Plastic Stainless Steel Glass ABS Plastic Stainless Steel eh Polyurethane Foam INSULATION L D04762 L D04764 L D04766 L D04768 DEFROST SYSTEM None COMPRESSOR Hermetic 130W Model CE56Y 1ZU CONDENSER Fin and Tube Type Cooling Fan Motor x 1 EVAPORATOR UPPER Bare Tube Type LOWER Pipe on Sheet Type REFRIGERANT CONTROL Constant Pressure Expansion Valve REFRIGERANT TYPE CHARGE Ground Fault Circuit Interrupter Ground Wire COMPRESSOR PROTECTION SLIDING DOOR 4 pcs Ape a CRUE WEIGHT 32 IE kg 37kg 46kg 42kg 53kc 47 kg 60 kc
13. p Cover si No Top Frame 3 Fig 1 Top Frame f Front Glass 2 Fig 2 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 frame off the bottom fit 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 frame and release it from the fit 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 9 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 Unbraze the joint indicated Remove the four machine screws securing the unit base The whole unit can be pulled out 20 FZ E A k L N Ke x Y ww d Fig 3 Truss Head Tapping Holder Screw 4 x 25 Evaporator Pipe Evaporator Pipe Truss Head Tap
14. ping Screw 4 x 10 Fig 4 Outlet Pipe Expansion Valve 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 Repair of the refrigerant circuit needs brazing It is no problem to use the same handy flux 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 contain
15. s 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 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 paris 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 MODEL NAME H NC 120BA L R S High Grade _ L Exterior S Stainless steel Counter Showcase Unit Location Width cm L Unit on left 120 150 180 210 R Unit on right Development Order HA model Start
16. s from A Unit on left 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 temperature is too low For more intensive c
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