Hoshizakiメーカー73183の使用説明書/サービス説明書
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Hoshizaki “A Superior Degr ee of Reliability” www .hoshizaki.com Models Reach-In B-Series Commercial Series Refrigerated Kitchen Equipment Hoshizaki America, Inc.
2 IMPOR T ANT Only quali ed ser vice technicians should inst all, ser vice , and maintain the unit. No ser vice or maint enance should be under tak en until the t echnician has thoroughl y read this Ser vice Manual.
3 CONTENTS Impor tant Saf et y Inf or mation ................................................................................................. 5 I. Specications .......................................................................................
4 D . Diagnostic Char t ......................................................................................................... 35 1 . Unit Not Cooling .................................................................................................
5 Impor tant Safety Inf ormation Throughout this man ual, notices appear t o bring your at tention t o situations which could result in death, serious injur y , or damage to the unit. W ARNING Indicates a hazardous sit uation which could result in death or serious injury .
6 •Makesur ethepowers witchisinthe"OFF"positionbefor eplugginginor unplugging the unit to r educe the r isk of electric shock. •Donotuseaunitwithadamagedpow ercor d.
7 I. Specications A. Nameplate Ratings Model A C Supply V oltage Amperes Design Pr essur e (PSIG) Refr igerant (oz.) HIGH LOW 1 34a 404A CR1B-FS/HS 1 1 5/60/1 4 240 12 0 11 - CF1B-FS/HS 9 450 250 -.
8 2. One Section/T wo Section/Thr ee Section Unit: mm (in.) Ad ditional Dimensions Model Inter ior Width Inter ior Height Inter ior Depth Door Stay Open P osition Caster Height (Standard) Caster Height (Option) Leg Height (Option) One Section 579 (22.
9 II. General Inf ormation A. Construction 1 . One Section Contr ol Module Condenser F an Motor Condenser Displa y Module F ront P anel Door Door Gasket Contr ol Bo x P ower S witch Door Lock Models C.
10 2. T wo Section Models CR2B-FS/HS and CF2B-FS/HS Model Shown: CR2B-HS P ower C ord Compr essor Condenser F an Motor Condenser F ront P anel Contr ol Module Displa y Module P ower S witch Door Lock .
11 3. Three Section Compr essor Condenser F an Motor F ront P anel Contr ol Module Displa y Module P ower S witch Door Lock Light Reservoir Float S witch Reservoir Cover Door Door Gasket Contr ol Bo x.
12 B. Sequence of Operation 1 . Sequence Cy c les and Shutdo wn The steps in the sequence ar e as outlined below . Note: 1 . There is a slight dela y at star tup. 2. W hen power is turned on, the 2-hour high-temperatur e alar m timer is bypassed. Theref ore , a high-temperatur e alarm can occur at star tup .
13 b) F r eez er 1 . Startup/Cool Down MH and PH energiz e. Ther e is a slight dela y befor e cabinet t emperatur e or high-temper atur e alarm (Hi) appears on DM and Comp , ConFM, and Ev apFM energiz e. 2. Cool D o wn Ac hie ved CM monitor s cooling of the cabinet via CTh.
14 2. Sequence Flow Charts a) Refr iger at or Refr ig er at or Sequence Flow Chart Legend: Comp -compressor ConFM -condenser f an motor CTh -cabinet thermistor DTh- defrost thermistor EvapFM -e vaporat or f an mot or MH -mullion heat er 1 . Startup/Cool Do wn 2.
15 b) F r eez er F r eezer Sequence Flow Chart 3. Cool Down Restart Legend: Comp -compressor ConFM -condenser f an motor CTh -cabinet thermistor DH -defrost heat er DTh- defrost thermistor EvapFM -e vaporat or f an mot or MH -mullion heat er PH -perimeter heater 1 .
16 C. Display Module Whenthepo wers witchismov edtothe"ON"positionther eisaslightdela y ,thenthe current cabinet t emperature is displa yed. F rom the displa y module, the cabinet setpoint andtemper atur edispla yscalecanbechanged.
17 2. Controls and A djustments a) Default Set tings 1 . T emperatur e Set ting: Refrigerat or : 36°F (2°C). F reez er : -4°F (-20°C). 2. T emperatur e Displa y Scale: F . b) T emperat ur e Setpoint The temper atur e setpoint is the v alue for the a v erage cabinet temper atur e.
18 Displa y C able F ig. 2 D . Contr ol Module All models are pr etest ed and f actor y set . C A UTION 1 . The control module is fr agile, handle v er y carefull y . 2. Do not change wir ing and connections. Ne v er misconnect t erminals. 3. Do not shor t out pow er suppl y t o t est f or voltage .
19 2. Alarm Safeties Alar m signals ar e designed t o pr ot ect the unit and f ood product. These alarms give inf ormation or war nings in the e vent the unit is operating out of accept ab le paramet ers. Should one of the alar ms occur , f ollow the instructions in the table belo w t o addr ess the alar m.
20 E. Compressor O ver load, Short Cyc le Pr ot ection, and High-Pr essure S witch 1 . Compr essor Ext ernal or Int ernal Ov erload If combined temper atur e/amperage v alue is abov e the limit speci ed by the compressor man uf acturer , the compr essor ov er load operat es independently t o turn of f the compressor .
21 III. T echnical Data A. Refr ig er ation Cir cuit Ev aporat or F ans (2 or 3 depending on model) Ev aporat or Expansion V al v e Compr essor Low -Side Access Va l v e Condensat e P an High-P ressur.
22 B. W iring Diagr ams 1 . CR1B-FS/HS, CR3B-FS/HS * High-Pr essure Switc h Cut-out 270±1 0 PSIG Cut-in 1 90±20 PSIG *.
23 2. CR2B-FS/HS, CR3B-FS/HS * High-Pr essure Switc h Cut-out 270±1 0 PSIG Cut-in 1 90±20 PSIG *.
24 3. CF1B-FS/HS, CF3B-FS/HS ** Defr ost Thermostat Cut-out 12 0 ° F±5 ° F (49 ° C±3 ° C) Cut-in 70 ° F±5 ° F (21 ° C±3 ° C) * High-Pr essure Switc h Cut-out 490±1 0 PSIG Cut-in 370±20 P.
25 4. CF2B-FS/HS, CF3B-FS/HS ** Defr ost Thermostat Cut-out 12 0 ° F±5 ° F (49 ° C±3 ° C) Cut-in 70 ° F±5 ° F (21 ° C±3 ° C) * High-Pr essure Switc h Cut-out 490±1 0 PSIG Cut-in 370±20 P.
26 5. CR3B-FS/HS Receptac le Bo x Connection 6. CF3B-FS/HS Receptac le Bo x Connection Note: Only the t op r eceptacles ha ve po wer . Note: Only the t op r eceptacles ha ve po wer .
27 IV . Service Diagnosis W ARNING 1 . This unit should be diagnosed and repair ed only by quali ed ser vice personnel t o reduce the risk of death, electr ic shoc k, serious injur y , or re . 2. Risk of electr ic shock. Use e xtr eme caution and e xer cise safe electrical practices .
28 1 . R efr igerat or 7) Startup/Cool Down– Ev apFM and MH energiz e . Ther e is a slight dela y , then Comp and ConFM ener gize and cabinet temper atur e or high-t emperatur e alar m (Hi) appears on DM. a) StartupDiagnosis: Chec k that Ev apFM ener gize .
29 8) Cool Down Ac hie ved –CTh cools t o 3°F (1 .7°C) below setpoint. Ev apFM and MH continue . Comp and ConFM de-ener gize. Diagnosis: If Comp and C onFM do not de-energiz e,conr mCThstatus . See"IV .C . Ther mistorChec k.
30 2. F reezer 7) Startup/Cool Down– MH and PH ener gize. There is a slight dela y , then Comp , ConFM, and Ev apFM ener gize and cabinet t emperature or high-t emperature alarm (Hi) appears on DM. Once DTh reaches 32 ° F (0 ° C), 4-hourComp cum ulativ e run timer star ts.
31 c) HPS Activ ation: Conr m C onFM is ener gized and f an blade turns freel y . Check that the condenser coil is not clogged or restrict ed. Check that ther e ar e no r estrictions in the refrigeration cir cuit (dr ier , TXV).
32 Defrost T ermination: Has DTh w ar med to 59°F (1 5°C)? If not yet conrmed, conr m DThstatus . See"IV .C . Ther mistorChec k."IfDThisgoodbutdefrostt er mination temper atur e is not r eached, conrm DH amp draw and contin uity .
33 B. Control Module Chec k Bef or e r eplacing a contr ol module that does not sho w a visible def ect and that you suspect is bad, alw ay s conduct the follo wing chec k pr ocedur e.
34 "IV .A.2.9)Defrost"and"IV .C . Ther mistorChec k."Ifcomponentsfailt ostar t,control module must be r eplaced.
35 D . Diagnostic Chart Bef or e consulting the diagnostic char ts, chec k the follo wing: •Checkthesetpoint. F orf actor ydef aultset tings,see"II.
36 Unit Not Cooling - P ossible Cause 1 1. Compr essor Overload a) Dir ty condenser . b) Condenser f an not operating. c) Def ective . 12 . Compr essor a) Def ectiv e. 13 . Condenser a) Dirt y . 14 . Ev aporat or See"2. Evaporat orisFr ozenUp .
37 V . R eplacement of Components W ARNING 1 . This unit should be diagnosed and repair ed only by quali ed ser vice personnel t o reduce the risk of death, electr ic shoc k, serious injur y , or re .
38 2. Brazing W ARNING 1 . R-1 34a and R-404A themselv es ar e not ammable at atmospheric pressur e and temper atur es up t o 1 7 6°F (80°C). 2. R-134a and R-404A themsel ves ar e not explosiv e or poisonous.
39 4) Close the low -side val v e and high-side val v e on the g auge manif old. 5) Disconnect the gauge manif old hose from the v acuum pump and at tach it t o a refrigerant service cylinder . Remember t o loosen the connection and purge the air fr om the hose.
40 B. Impor tant Not es f or Component R eplacement C A UTION When r eplacing a component listed belo w , see the notes t o help ensure pr oper operation.
41 VI. Cleaning and Maint enance Instructions A. Cleaning W ARNING 1 . Bef or ecleaningtheunit,mov ethepowers witchtothe"OFF"positionand unplug the unit to pr ev ent electr ic shoc k b y une xpected entrance of w at er into the unit or injury by mo ving par ts.
42 C. Shutdown and Long St orage W ARNING 1 . When pr eparing the unit for long st orage, pr e vent the door s fr om closing t o reduce the risk of childr en get ting trapped. 2. T o reduce the risk of electric shock, do not t ouch the at tachment plug or pow er s witch with damp hands.
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