Instruction/ maintenance manual of the product HR24A Hoshizaki
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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.
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.
3 CONTENTS Impor tant Saf et y Inf or mation ................................................................................................. 5 I. Specications .......................................................................................
4 VI. Cleaning and Maintenance Instructions ......................................................................... 37 A. Cleaning ......................................................................................................................
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 .
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 .
7 I. Specications 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.
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 specications and design without pr ior notice.
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 .
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 , DMLEDs ash 3 times , then ° F LED tur ns on. P ress the po wer b ut t on f or 2sec., the cabinet temper atur e and Ev apFM icon tur n on and EvapFM st ar ts.
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 Compener 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.
12 2. Sequence Flow Chart HR24A Sequence Flow Chart • Defrost icon turns on. • If Comp run time <3min., 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.
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 .
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 .
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 °Fto°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 °Fto °C.
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.
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 .
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.
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.
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.
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 .
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.
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).
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.
25 B. W iring Diagram 1 . HR24A.
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 .
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 .
28 c) DefrostT er mination: Comp icon is on. EvapFM icon ashing. 30-min. DT terminates . 6-hr . DTstar 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.
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).
30 b) DefrostT er mination: Comp icon is on. EvapFM icon ashing. 30-min. DT terminates . 6-hr . DTstar 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.
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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If you have not bought Hoshizaki HR24A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Hoshizaki HR24A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Hoshizaki HR24A you will learn all the available features of the product, as well as information on its operation. The information that you get Hoshizaki HR24A will certainly help you make a decision on the purchase.
If you already are a holder of Hoshizaki HR24A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Hoshizaki HR24A.
However, one of the most important roles played by the user manual is to help in solving problems with Hoshizaki HR24A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Hoshizaki HR24A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
