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Hoshizaki HR24A manual

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Table of contents for the manual

  • Page 1

    Hoshizaki “A Superior Degr ee of Reliability” www .hoshizaki.com Model HR24A Undercounter Refrigerator Hoshizaki America, Inc. Number: 73187 Issued: 12-7-2011 SE RV ICE MA NU AL[...]

  • Page 2

    2 W ARNING Only quali ed ser vice technicians should inst all and ser vice the appliance . T o obtain the name and phone number of y our local Hoshizaki Cer ti ed Ser vice Repr esentativ e, visit www .hoshizaki.com. No ser vice should be under tak en until the technician has thor oughly r ead this Ser vice Manual. F ailure t o ser vice and ma[...]

  • Page 3

    3 CONTENTS Impor tant Saf et y Inf or mation ................................................................................................. 5 I. Specications ...................................................................................................................... 7 A. Electr ical and Refrigerant D ata ............................[...]

  • Page 4

    4 VI. Cleaning and Maintenance Instructions ......................................................................... 37 A. Cleaning ...................................................................................................................... 37 1 . Ext erior .................................................................................[...]

  • Page 5

    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 , damage t o the appliance, or damage t o proper t y . W ARNING Indicates a hazar dous situation which could r esult in death or serious injury . NO TICE Indicates a sit uation which could re[...]

  • Page 6

    6 W ARNING, continued • This appliance is not intended f or use by per sons (including children) with r educed ph y sical, sensor y , or mental capabilities, or lac k of e xper ience and knowledge , unless they ha ve been giv en super vision or instr uction concerning use of the appliance by a per son responsib le f or their safety . • Children[...]

  • Page 7

    7 I. Specications A. Electrical and R efrigerant Data See the nameplate f or electrical and refrigerant data. The nameplate is locat ed inside the cabinet. Electrical and R efriger ant Data Model A C Supply V oltage Amperes Design Pr essur e (PSIG) Refr igerant (oz.) HIGH LOW 1 34a HR24A 1 15/60/1 4 360 12 0 2.80 W e r eser v e the r ight to mak[...]

  • Page 8

    8 2. Dimensions Unit: mm [in.] T op View F ront View Side View Ad ditional Dimensions (mm [in.]) Model Inter ior Width Inter ior Height Inter ior Depth Door Stay Open P osition HR24A 460 [1 8.1 1] 475 [18.70] 450/330 [1 7 .72/1 3.00] 61 6 [24.25] W e r eser v e the r ight to mak e changes in specications and design without pr ior notice.[...]

  • Page 9

    9 II. General Inf ormation A. Construction 1 . HR24A Displa y Module/Contr ol Board Condenser Door Door Gasket Star t R ela y Door Switch Compr essor Condensat e Drain Pa n P ower C ord • Ev aporat or F an • Ev aporat or • C abinet Ther mistor • Ev aporat or F an Shroud Door Lock Drier C apillar y T ube Compr essor Wir e Har ness Condensat [...]

  • Page 10

    10 B. Sequence of Operation 1 . Sequence Cyc les and Shutdown The steps in the sequence ar e as outlined below . When pow er is supplied t o CB , DMLEDs  ash 3 times , then ° F LED tur ns on. P ress the po wer b ut t on f or 2sec., the cabinet temper atur e and Ev apFM icon tur n on and EvapFM st ar ts. 2-min. Comp dela y timer star ts. C[...]

  • Page 11

    11 4. Cool Down Rest art EvapFM and Comp icons ar e on. CTh w ar ms t o 4°F abo v e setpoint. Comp icon tur ns on and Compener gizes. 3-min. Comp run timer star ts. 5. Defrost Initiation EvapFM and Defr ost icons are on. a) A ut omatic Defr ost Initiation: EvapFM and Defr ost icons are on. EvapFM contin ues. 6-hr .DTterminates . 30-min. D[...]

  • Page 12

    12 2. Sequence Flow Chart HR24A Sequence Flow Chart • Defrost icon turns on. • If Comp run time <3min., Comp icon and Comp continue until 3-min. Comp run timer terminates. Once 3-min. Comp run timer terminates, C omp de-energiz es and defrost starts. Legend: Comp -compressor CTh -cabinet thermistor ESM -energy sa ving mode EvapFM -e va[...]

  • Page 13

    13 C. Control Boar d and Display Module • F or f actor y def ault set tings, see "II.H. Ser vice Menu." • F or contr ol boar d chec k pr ocedur e, see "IV .B . Contr ol Boar d Chec k." NO TICE • The control boar d and display module ar e fragile; handle very carefull y . • The control boar d and display module cont ain i[...]

  • Page 14

    14 DISPLA Y MODULE RIBBON CABLE E1 E2 CONTROL BOARD F ig. 1 1 . Control Boar d Lay out Compr essor (1 1 5V AC) P ower Suppl y Input (1 1 5V A C) C abinet Ther mist or Door S witch (5VDC) Evapor at or F an Motor (1 2VDC) Contr ol Boar d Displa y Module Ribbon C ab le Displa y Module Contr ol Boar d Compr essor Icon Displa y Defrost Icon Evapor at or[...]

  • Page 15

    15 D . Cabinet T emperat ure 1 . Default Settings The def ault CT setpoint is 39°F . The default CT displa y scale set ting is °F . NOTICE! Do not change the CT display scale fr om °Fto°C. All temper at ure relat ed values in the service menu must be c hanged manuall y if the CT displa y scale is changed fr om °Fto °C. a) Adjusting t[...]

  • Page 16

    16 E. Display Module Icons Displa y module icons inf or m you of ener gized components and if the appliance is in alar m. Display Module Icons Icon Meaning Compr essor Steady: Compressor running. Flashing: • Compressor dela y timer . C ompressor st ar ts within 2 min. • While adjusting cabinet t emperatur e setpoint. For cabinet t emperatur e s[...]

  • Page 17

    17 G. Alarm Safeties The alar ms ar e designed t o pr ot ect the appliance and the it ems inside. These alar ms giv e inf or mation and war nings in the e vent the appliance is oper ating out of acceptab le paramet er s . For all alarms ex cept P r1, the alar m icon tur ns on and the alarm code alternates with the cabinet t emperature . If the P r1[...]

  • Page 18

    18 b) Clearing High and Lo w T emperat ure Alarms T o clear an alar m, f ollow the st eps below . 1) P r ess the "-" b ut ton f or 3 sec. to ent er the alar m menu. "EnS" is display ed. 2) P r ess the "-" or "+" b ut ton t wice. Af ter pr essing the "-" or "+" b ut ton the r st time , &[...]

  • Page 19

    19 b) Service Menu Chart Setpoint Service Menu Min. Max. Unit Fact or y Set ting Description SP See r1 See r2 °C/°F 39°F Cabinet setpoint. (compressor of f temper ature). (see r0 f or compressor on t emperature). Thermist or Input (Do Not Adjust) Service Menu Min. Max. Unit Fact or y Set ting Description CA 1 -25 25 °C/°F 0 Cabinet thermistor [...]

  • Page 20

    20 Defrost (Do Not Adjust) Service Menu Min. Max. Unit Fact or y Set ting Description d0 0 99 hrs . 6 Defr ost int er v al: 0=no defrost d1 0 2 --- 2 Defrost type. Do not adjust. 0=electric heater 1=hot gas 2=of f cycle (e v aporat or fan mot or) d2 -99 99 °C/°F N/A Limit f or defrost if P3 = 1 or 2. d3 0 99 min. 30 Defr ost duration. d4 0 1 --- [...]

  • Page 21

    21 T emperat ure Alarm (Do Not Adjust) Service Menu Min. Max. Unit Fact or y Set ting Description A0 0 1 --- 0 AL alarm sensor . Do not adjust. 0=cabinet thermistor 1=e v aporat or thermistor A1 -99 99 °C/°F - 10 Degr ees below setpoint f or AL alarm when A2=1 . Do not adjust. A2 0 2 --- 1 AL alarm. Do not adjust. 0=deactivat ed 1=A1 relativ e to[...]

  • Page 22

    22 Evapor ator Fan Mot or (Do Not Adjust) Service Menu Min. Max. Unit Fact or y Set ting Description F0 0 4 --- 1 F an operation with door closed. Do not adjust. 0=of f 1=on: see also F1 3, F1 4, and L 10 2=parallel with compr essor 3= dependent on F1 4=disabled when compr essor is off , dependent on F1 when compressor is on. F1 -99 99 °C/°F 30 F[...]

  • Page 23

    23 Serial Netw ork (Do Not Adjust) Service Menu Min. Max. Unit Fact or y Set ting Description LA 1 247 --- 247 Addr ess (not used) Lb 0 3 --- 2 Baud Rate (not used) LP 0 2 --- 2 Parity (not used)[...]

  • Page 24

    24 III. T echnical Data A. Refr ig er ation Cir cuit Evapor at or C apillar y T ube Compr essor Drier Condenser Lef t Side P er imet er Liquid Line Condensat e P an Evapor at or F an Motor[...]

  • Page 25

    25 B. W iring Diagram 1 . HR24A[...]

  • Page 26

    26 IV . Ser vice Diagnosis W ARNING • This appliance should be diagnosed and repair ed only b y quali ed ser vice personnel t o reduce the risk of death, electr ic shoc k, serious injur y , or re . • Risk of electric shock. Use extr eme caution and ex ercise saf e electr ical practices . • Moving par ts (e .g . fan b lade) can cr ush an[...]

  • Page 27

    27 7) Startup–Ev apFM icon is on and Comp icon is ashing. EvapFM ener gizes. 2-min.Comp dela y timer star ts. Comp icon  ashes until 2-min. Comp dela y timer terminates . Diagnosis: Check that CT LEDs and Ev apFM icon turn on. Next, chec k that Ev apFM ener gizes . If not, conr m that DS is engaged. Check acr oss DSfor 5VDC . If 5V[...]

  • Page 28

    28 c) DefrostT er mination: Comp icon is on. EvapFM icon ashing. 30-min. DT terminates . 6-hr . DTstar ts. Comp icon turns on and Comp ener gizes . 2-min. EvapFM timer star ts. Ev apFM icon star ts  ashing and EvapFM de-ener giz es. When 2-min. Ev apFM timer t er minat es , Ev apFM icon turns steady and Ev apFM ener gizes . Nor mal oper[...]

  • Page 29

    29 B. Control Boar d Check Bef or e r eplacing a CB that does not sho w a visib le def ect and that y ou suspect is bad, alw ay s conduct the follo wing chec k pr ocedur e. This procedur e will help you v erify your diagnosis. Alw a ys choose a neutral (W wir e) to estab lish a good neutral connection when checking A C v oltage (1 1 5V A C). Startu[...]

  • Page 30

    30 b) DefrostT er mination: Comp icon is on. EvapFM icon ashing. 30-min. DT terminates . 6-hr . DTstar ts. Comp icon tur ns on and Comp ener gizes. 2-min. EvapFM timer star ts. Ev apFM icon star ts  ashing and EvapFM de-ener giz es. When 2-min. EvapFM timer terminates , Ev apFM icon tur ns steady and Ev apFM energizes . Nor mal operatio[...]

  • Page 31

    31 D . Diagnostic Chart Bef or e consulting the diagnostic char ts, chec k the follo wing: • Check the cabinet t emperature setpoint and f actory default set tings. F or fact or y def ault set tings, see "II.D . Cabinet T emperatur e" and "II.H. Ser vice Menu." • Make sur e the doors ar e not lef t open or opened too of t en[...]

  • Page 32

    32 2. Evapor at or is F rozen Up Evapor ator is F rozen Up - P ossible Cause 1. Evapor at or a) Dir ty . 2. Ev aporat or F an Motor a) Defectiv e . 3. Contr ol Boar d a) Def ectiv e, not oper ating e v aporat or fan mot or . 4. Refrigerant/R efrigerant Lines a) Gas leak, low char ge. b) Refrigerant lines r estricted. 3. Defrost F ails t o Start or [...]

  • Page 33

    33 V . Replacement of Components W ARNING • This appliance should be diagnosed and repair ed only b y quali ed ser vice personnel t o reduce the risk of death, electr ic shoc k, serious injur y , or re . • P r ess the pow er b ut ton f or 2 sec. to turn of f the appliance, then unplug the power cord fr om the electr ical outlet bef ore se[...]

  • Page 34

    34 2. Brazing W ARNING • R-1 34a itself is not ammab le at atmospher ic pr essur e and temper atur es up t o 21 2°F (1 00°C). • R-1 34a itself is not explosiv e or poisonous. Howe ver , when exposed t o high temper atur es (open  ames), R-1 34a can be decomposed t o f or m hy drouoric acid and carbonyl uoride both of which are haz[...]

  • Page 35

    35 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. See the nameplate f or the requir ed refrigerant charge . Hoshizaki recommends only vir gin refrigerant or r eclaimed r efrigerant which meets the requir ements of A[...]

  • Page 36

    36 C. Door Re ver sal If you w ould lik e t o r e ver se the door s wing, f ollow the steps belo w . 1) Make sur e the appliance is of f and unplugged. 2) Remo ve the f astener s securing the top panel. See Fig . 1 . Being careful not t o pull on the wires t o the control panel and door s witch, lif t of f the top panel. Secure the t op panel so th[...]

  • Page 37

    37 VI. Cleaning and Maint enance Instructions A. Cleaning W ARNING • Bef or e cleaning the appliance , tur n of f and unplug the appliance to pr ev ent electric shock b y une xpected entrance of w at er int o the appliance or injur y b y moving par ts . • Bef or e cleaning the appliance , mov e all items int o another r efrigerat or . • Do no[...]

  • Page 38

    38 VII. Pr eparing the Appliance for P eriods of Non-Use When shut ting down the appliance f or mor e than one week, f ollow the instructions below . W ARNING When pr epar ing the appliance f or long storage , pr e vent the door fr om closing to r educe the r isk of childr en get ting trapped. Leav e the shel v es in place so that children ma y not[...]

  • Page 39

    39 VIII. Disposal W ARNING When pr epar ing the appliance f or disposal, remov e the door to r educe the risk of children get ting trapped. Lea v e the shel v es in place so that childr en ma y not easily climb inside. This appliance contains r efrigerant and must be disposed of in accor dance with applicable national, st at e , and local codes and[...]