Hoshizaki AM-50BAE-AD manual

Hoshizaki “A Superior Degr ee of Reliability” www .hoshizaki.com Models AM-50BAE AM-50BAE-DS AM-50BAE-AD AM-50BAE-ADDS Self-Contained Cuber Hoshizaki America, Inc. Number: 73126 Issued: 12-22-2004 Revised: 5-23-2013 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. F ailure t o ser vice and ma[...]

3 CONTENTS Impor tant Saf et y Inf or mation ................................................................................................. 4 I. Construction and W ater/R efrigeration Cir cuit Diagr am ....................................................... 7 A. Construction .......................................................................[...]

4 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[...]

5 W ARNING, continued • Do not make an y alterations t o the appliance. Alt erations could r esult in electric shock, serious injur y , r e, or damage . • Do not use an e xt ension cor d. • Do not use an appliance with a damaged pow er cor d. The power cor d should not be alter ed, jer k ed, b undled, weighed do wn, pinched, or tangled. Su[...]

6 NO TICE • P r ot ect the  oor when mo ving the appliance t o pr e vent damage t o the  oor . • When making w at er supply or dr ain line r epair s , f ollow the requir ements found in the instruction manual to r educe the r isk of costly w ater damage. • In areas wher e wat er damage is a concer n, conrm appliance is installed in a[...]

7 I. Construction and W ater/R efrigeration Cir cuit Diagram A. Construction T op P anel Ice Making Mechanism Scoop Holder F ront P anel Contr ol S witch Louver Bin Contr ol Ther mostat Bulb Slope Magnet C atch Door P ower C ord[...]

8 B. W at er/R efr igeration Cir cuit Diagr am Inlet W ater V alve Pump Motor W ater T ank Evaporator Capillary T ube Accumulator Ice Storage Bin Hot Gas V alve Compressor Condenser Drier Fan W ater Circuit Refrigeration Circuit Spray Assembly Ice Chute Strainer Thermistor T o Drain Heat Exchanger[...]

9 II. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flo w Char t Components Energized when the Contr ol S witch is in the "W A SH" P osition The "W ASH" position on the control s witch is used when cleaning and sanitizing the icemaker . W hen in the "W ASH" position, power is supplied t o the pum[...]

10 B. Service Diagnosis W ARNING • The 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 . • Risk of electric shock. Contr ol s witch in "O[...]

11 1 . Diagnostic Pr ocedure: Auxiliary Code C-0 and Earlier 3) P ow er On/Initial Harvest Cy cle. Move the contr ol switch t o the "ICE" position. Comp , HGV , and WV energize . Initial har vest c y cle star ts. 50-sec. HT and 1 02-sec. WVT star t. a) P ow er On Diagnosis : If Comp , HGV , and WV do not energiz e, conrm appliance is p[...]

12 4) Initial F r eeze Cyc le . Comp and 1 02-sec. WVT (WV continues another 52sec.in freez e cycle) contin ue. FM and PM energiz e. HGV de-energizes . When 1 02-sec. WVT terminates , WVde-energiz es. CB monit or s the cooling of the e v aporator via the ther mist or locat ed on the e vaporat or for fr eeze termination. When the thermistor[...]

13 c) WV Diagnosis : Check that wat er enter s the wat er tank. If not, check that the wat er supply line shut-of f val v e is open and screens or e xt ernal lter s are clear . Check f or 1 1 5V A C at CB C2 (BK) to neutral (W) and CB A2 (V) to neutral (W). If1 1 5V A C is not present at CB C2 (BK) t o neutral (W), check wiring fr om BC . If [...]

14 2. Diagnostic Pr ocedure: A uxiliary Code C-1 and L ater 3) P ow er On/Initial Harvest Cy cle – LED 1 is ashing and LED 3 is on. Mov ethe control s witch to the "ICE" position. LEDs 1 (gr een), 3 (gr een), and 4 (orange) tur n on briey then tur n of f. Then LED 1 star ts  ashing , LED 3 tur ns on and C omp , HGV , and WV [...]

15 4) Initial F r eeze Cyc le – LED 1 is ashing and LEDs 3 and 2 are on . Comp and 1 02-sec. WVT (WV continues another 52sec. in freez e cycle) contin ue. FM and PM energiz e. HGV de-energizes . When 1 02-sec. WVT t erminates, LED 3 turns of f and WVde-energiz es. CBmonitor s the cooling of the e v aporator via the thermistor locat ed[...]

16 b) HGV Diagnosis : If Comp is energiz ed and ev aporator is not w arming, chec k that HGV energiz es and opens. If not, check f or 1 1 5V AC at CB C1 (BR) t o neutral (W) and CB B1 (P) to neutr al (W). If 1 1 5V A C is pr esent at CB C1 (BR) to neutr al (W) and not at CB B1 (P) to neutr al (W), r eplace CB . If 1 1 5V AC is not pr esent at CB C1[...]

17 7) Shutdown. W hen the appliance is running, hold ice in contact with the thermostatic bulb . BC s witch opens within 1 0 sec., shut ting down the appliance. BC is f actor y set, and generall y no adjustment is r equir ed. Howe ver , adjustment ma y be needed in some conditions, par ticularly at higher altitude locations . Legend: BC –bin cont[...]

18 D . Ther mist or Check T o check thermistor r esistance , f ollow the steps belo w . 1) Mov e the control s witch to the "OFF" position. 2) Unplug the appliance. 3) Remo ve the contr ol bo x cov er . 4) Remo ve the thermistor fr om the e vaporat or . 5) Immerse the thermistor sensor por tion in a glass containing ice and w ater f or 2 [...]

19 E. Diagnostic T ables 1 . No Ice Pr oduction No Ice Pr oduction - Possib le Cause 1. P ower Suppl y a) Unplugged, of f, b lown fuse , or tripped break er . b) Not within specications. 2. W ater Suppl y a) W ater supply of f or improper w ater pr essure. b) External wat er lt ers clogged. 3. Optional Drain P ump (HS-0248 or HS-5061) a) Saf [...]

20 2. F reeze-Up Defrost and clean the icemak er pr ior t o diagnosing fr eeze-up . Fill out a fr eez e-up chec klist. See the Hoshizaki America T echnician's P ock et Guide or contact your local distribut or for a cop y of the fr eez e-up chec klist. F reeze-Up - P ossible Cause Harvest Cy cle 1. Evapor at or a) Scaled up . b) D amaged. 2. Ic[...]

21 3. Low Ice P r oduction Low Ice P r oduction - P ossible Cause Long Harvest Cy cle 1. Evapor at or a) Scaled up , dir ty . 2. Ice Chute a) Out of position. b) D amaged. 3. Refrigerant Charge a) L o w. 4. Control Boar d See "III.B. Set tings and Adjustments ." a) Ther mist or connection loose. b) Har v est contr ol mov ed from f actory [...]

22 III. Control Boar d • A Hoshizaki e x clusive contr ol board is emplo yed in AM series appliances. • All models are pr etest ed and f actor y adjust ed. NO TICE • F ragile, handle v er y carefull y . • The control boar d contains integ rat ed circuits, which ar e susceptible t o f ailure due to st atic dischar ge . It is especially impor[...]

23 A. Control Boar d L a y out 1 . Auxiliary Code C-0 and Earlier • 1 15V A C Control Board P ower Suppl y U–1 15V AC C ontr ol Board P ower Suppl y (BK) V–Neutral (W) • TH1 Connector Thermistor • B1 Connector Hot Gas V alve • X1 Rela y Hot Gas V alv e P ump Mot or F an Motor • TH2 Connector Thermistor • Control T ransf ormer • X2[...]

24 2. Auxiliary Code C-1 and Later LED 3 LED 2 LED 1 COLD W ARM COLD W ARM • 24V AC Contr ol Boar d P o wer Suppl y B–24V AC Contr ol Board P ower Supply (R) W–Neutral (LB U) • TH1 Connector Thermistor • B1 Connector Hot Gas V alve • X1 Rela y Hot Gas V alv e P ump Mot or F an Motor • TH2 Connector Thermistor • LED 3 Hot Gas V alv e[...]

25 B. Set tings and Adjustments 1) VR1 Harvest Contr ol VR1 har v est contr ol is f or adjustment of the har vest cy cle completion temperatur e. F actory set, do not adjust. NO TICE Do not adjust VR1 har v est contr ol. VR1 har vest contr ol is f actor y set f or proper operation. Adjustment outside of the f actor y def ault set ting will r esult [...]

26 C. LED Lights A uxiliar y Code C-1 and Later 1) LED 1 24V A C G reen LED 1  ashes to indicat e proper 24V AC and continues t o ash unless BC is open, control s witch is mov ed to the "OFF" position, or appliance is unplugged. 2) LED 2 F r eeze GreenLED 2 (PM) turns on at freez e cy cle initiation and tur ns of f at freeze c y [...]

27 IV . R efr igeration Cir cuit and Component Ser vice Inf ormation 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 . • Mov e the control s witch to the "OFF" position, then unplug the appliance fr om the ele[...]

28 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[...]

29 6) A liquid charge is r ecommended when charging an R-1 34a sy stem. Place the ser vice cylinder on the scales; if the ser vice cylinder is not equipped with a dip tube, in v er t the ser vice cylinder , then place it on the scales. Open the high-side val v e on the gauge manif old. 7) Allow the s ystem t o charge with liquid until the pr oper c[...]

30 V . Maint enance This appliance must be maintained in accor dance with the instr uction manual and labels pro vided with the appliance. Consult with your local Hoshizaki C er ti ed Ser vice Repr esentativ e about maint enance ser vice. W ARNING • Only quali ed ser vice technicians should service this appliance. • F ailure t o install, [...]

31 B. Optional Drain P ump HS-0248 or HS-5061 If the optional drain pump (HS-0248 or HS-5061) is installed, t est its operation at least once a year as outlined belo w . Note that the pump has po wer e v en when the contr ol s witch is in the "OFF" position. NO TICE If the optional drain pump is not operating pr oper l y or not primed pro[...]

32 8) Remo ve the dischar ge hose r estriction and allow the wat er to be pumped out normally . P ow er t o the appliance will be rest ored when the w at er in the drain pump r etur ns to a nor mal le vel. 9) If the appliance f ails t o turn of f with the dischar ge hose r estricted or the drain pump f ails to pump out the w ater , replace the dr a[...]

33 VI. Pr eparing the Icemak er f or Per iods of Non-Use During e xt ended periods of non-use, e xtended absences, or in sub-fr eezing temper atur es , f ollow the instructions below . W hen the appliance is not used f or t wo or three da ys under normal conditions, it is suf ficient t o mo v e the contr ol s witch to the "OFF" position. [...]

34 VII. Disposal This appliance contains r efrigerant and must be disposed of in accor dance with applicable national, st at e , and local codes and r egulations. Refrigerant m ust be reco ver ed b y pr operly cer ti ed ser vice personnel.[...]

35 VIII. T echnical Infor mation A. Specication and P erf ormance Data 1 . AM-50BAE, AM-50B AE-DS, AM-50B AE-AD , AM-50B AE-ADDS SPECIFICATION SHEE T MODEL: AM-50BAE, AM-50BAE-DS, AM-50BAE-AD, AM-50BAE-ADDS AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 3.4 A (5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 15 A MAXIMUM FUSE SIZE 15 A ELECTRIC[...]

36 B. W iring Diagrams 1 . Auxiliary Code C-0 and Earlier[...]

37 2. Auxiliary Code C-1 and Later[...]

38 3. HS-0248 and HS-5061 Optional Drain P ump a) HS-0248 b) HS-5061 T o Icemaker T o Icemaker[...]