Hoshizaki AM-50BAE-DS Ice Maker User Manual
Contents
1. Magnet Catch Front Panel i Control Switch amp fi L OU Ou ABS U U Ki S e RB Power Cord Louver B Water Refrigeration Circuit Diagram Capillary Tube Accumulator Ice Chute Spray Assembly Water Tank Ice Storage Bin Heat Exchanger Compressor Water Circuit Refrigeration Circuit 2 lagnosis J W AJLA JeleN 19 UI LAM NLA JeleN lelul 100w dund WNd JOU lseAJed LH anjea sef 10U ADH Jeun uoleuluuel ezeeJji L L4 Jeull ezeeJ 14 JO OW uej qy4 jeuondo duund uresp qq Jossejduioo duio Jeyeou Iloluoo uiq Hog Ionuoo utq 58 pueb6e A quuesse sleld 10je amp Jode e out JeAo MOJ Jeziiues pue Jeueej eu 4olow Ue pue Jolow duind y ol pellddns si jewod uonisod HSVN edl Ul ueuM ayewa eui Buizniues pue 6ulueelo ueuw pesn s uojiws loluoo eut uo uoiiisod HSVM eu 9 0q OL pesop 29 w 9Io O JSOMEH EMU hu ye sugs Jeyeuweol qinq ogejsouueui Bulyono sol ON p mo 9 9 99 E da pue H98 1deoxe pezifueue ep sjueuoduuoo v uedo Jg pezi amp 1eue ep sjueuoduuoo y HO 4exeuiro e uonisod HSVA edl U SI ue 04 U0D ay UJM pezibjeu3 sjueuoduio2 qing on2. mn mn mn E m 8 T Lii Lem eem LOL Zei E xx p DO l ae feu 1 4 ui 7 ar x x D E E e La E 1 1 iir La Lx r 1 1 Le 1 i Ss n M La Lil x Lit I I E ca 1 T Biz a 1 bes a Lu I 0 dul Lu Lit tit A uei em E k ec i Ex Hl a r cm r Ech Se SE T Lu Li Li T Li i EH 2 uc Lu I d o La c E z RU We e La ox CL E uu tij Rem E Lu ECT 37 BEI IG ei uu u Lu uad w ul tz ke r E Ei ul KE 3 HS 0248 and HS 5061 Optional Drain Pump a HS 0248 To Icemaker b HS 5061 IA IN BK GND GR mE m i To Icemaker N wl OPTIONAL DRAN PUMP HS 5061 NO REPLACEABLE PARTS fu e DBU UJ z DBU es R 9 SAFETY w FLOAT SWITCH Bk R Bk QO oo O ool 5666953 T d wl X Dies GR ll Ss LOWER UPPER GE FLOAT SWITCH en al 5 X344 CONTROL PUMP BOARD BK e BK BLACK E GS DBU DARK BLUE R i GR GREEN oo R RED X2 1 W WHITE 38
3. After recovery is complete replace the tap line valve with a proper permanent access valve 27 2 Brazing A WARNING R 134a itself is not flammable at atmospheric pressure and temperatures up to 212 F 100 C R 134a itself is not explosive or poisonous However when exposed to high temperatures open flames R 134a can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous Do not use silver alloy or copper alloy containing arsenic 1 Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG NOTICE Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made Install the new drier with the arrow on the drier in the direction of the refrigerant flow When brazing protect the drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 2 Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG Do not use R 134a as a mixture with pressurized air for leak testing 3 Evacuation and Recharge R 134a 1 Attach a vacuum pump to the system Be sure the high side charging hose is connected to the field installed high side access valve
4. Freeze Contro m y 8 Harvest Control An Do not adjust Woy amp eTH1 Connector TH2 Connector Thermistor Thermistor 115VAC Control Board Power Supply U 115VAC Control Board Power Supply BK V Neutral W 23 2 Auxiliary Code C 1 and Later B1 Connector C1 Connector Hot Gas Valve 115VAC X1 Relay Component Power Supply hot gas valve pump motor and fan motor A1 Connector Pump Motor Fan Motor C2 Connector X1 Relay 115VAC X2 Relay Component Power Supply Hot Gas Valve inlet water valve Pump Motor Fan Motor A2 Connector Inlet Water Valve e X2 Relay Le Inlet Water Valve eLED 2 e LED 3 Pump Motor 1 Hot Gas Valve Fan Motor LED3 LED 2 LED 1 flashes 24VAC Power OK p ae LED 1 ER D e Freeze Control a D ES 24VAC Control Board Power Supply a S B 24VAC Control Board Power Supply R m d IE W Neutral LBU Harvest Control Do not adjust HL CAL KINO 2v TH1 Connector TH2 Connector Thermistor Thermistor 24 B Settings and Adjustments 1 VR1 Harvest Control VR1 harvest control is for adjustment of the harvest cycle completion temperature Factory set do not adjust NOTICE Do not adjust VR1 harvest control VR1 harvest control is factory set for proper operation Adjustment outside of
5. a Comp Diagnosis Check that evaporator is warming If not confirm Comp is energized If not check for 115VAC at PTC and check PTC relay continuity If open replace PTC If closed check Comp external protector and motor winding continuity Replace as needed b HGV Diagnosis If Comp is energized and evaporator is not warming check that HGV energizes and opens If not check for 115VAC at CB C1 BK to neutral W and at CB B1 P to neutral W If 115VAC is present at CB C1 BK to neutral W and not at CB B1 P to neutral W replace CB If 115VAC is not present at CB C1 BK to neutral W check wiring connections from BC If 115VAC is present check HGV coil continuity Replace as needed 12 c WV Diagnosis Check that water enters the water tank If not check that the water supply line shut off valve is open and screens or external filters are clear Check for 115VAC at CB C2 BK to neutral W and CB A2 V to neutral W If 115VAC is not present at CB C2 BK to neutral W check wiring from BC If 115VAC is present at CB C2 BK to neutral W and not at CB A2 V to neutral W replace CB If 115VAC is present and WV does not energize check WV coil continuity If open replace WV d FM and PM Diagnosis Confirm FM and PM de energize If not check for 115VAC at CB A1 LBU to neutral W and CB B1 P to neutral W If 115VAC is present at CB A1 LBU and not at CB B1 P CB is still in freeze cycle or CB X1 relay is
6. BCH continuity If open replace BCH c Comp Diagnosis If Comp does not energize check PTC relay continuity If open replace PTC If closed check Comp external protector and motor winding continuity Replace as needed d HGV Diagnosis If Comp is energized and evaporator is not warming check that HGV energizes and opens If not check for 115VAC at CB C1 BR to neutral W and at CB B1 P to neutral W If 115VAC is present at CB C1 BR to neutral W and not at CB B1 P to neutral W replace CB If 115VAC is not present at CB C1 BR to neutral W check wiring connections from BC If 115VAC is present check HGV coil continuity Replace as needed e WV Diagnosis Confirm LED 3 is on If not replace CB If LED 3 is on check that water enters the water tank If not check that the water supply line shut off valve is open and screens or external filters are clear Check for 115VAC at CB C2 BR to neutral W and CB A2 O to neutral W If 115VAC is not present at CB C2 BR to neutral W check wiring from BC If 115VAC is present at CB C2 BR to neutral W and not at CB A2 O to neutral W replace CB If 115VAC is present and WV does not energize check WV coil continuity If open replace WV f Initial Harvest Cycle Termination Diagnosis 50 sec HT terminates and freeze cycle starts If not replace CB 4 Initial Freeze Cycle LED 1 is flashing and LEDs 3 and 2 are on Comp and 102 sec WVT WV continues anothe
7. If HGV is energized check for 115VAC at CB B1 P to neutral W If 115VAC is present after PM energizes replace CB If 115VAC is not present and HGV is bypassing replace HGV If WV is energized check for 115VAC at CB A2 V to neutral W If 115VAC is present replace CB If 115VAC is not present and WV is leaking by replace WV d Normal Freeze Cycle Termination Diagnosis 5 min FTT terminates harvest cycle starts If not check evaporator temperature where thermistor is mounted and check the thermistor See Il E Thermistor Check If evaporator temperature is below 27 F 3 C for more than 8 min and freeze does not terminate replace CB 7 Shutdown When the appliance is running hold ice in contact with the thermostatic bulb BC switch opens within 10 sec shutting down the appliance BC is factory set and generally no adjustment is required However adjustment may be needed in some conditions particularly at higher altitude locations Legend BC bin control CB control board Comp compressor FM fan motor FT freeze timer FTT freeze termination timer HGV hot gas valve HT harvest timer PM pump motor WV inlet water valve WVT inlet water valve timer 13 2 Diagnostic Procedure Auxiliary Code C 1 and Later 3 Power On Initial Harvest Cycle LED 1 is flashing and LED 3 is on Move the control switch to the ICE position LEDs 1 green 3 green and 4 orange turn on briefly then turn off Then LED 1 starts fl
8. bin Clean the ice storage bin liner using a neutral cleaner Rinse thoroughly after cleaning gt Q co 10 33 VII Disposal This appliance contains refrigerant and must be disposed of in accordance with applicable national state and local codes and regulations Refrigerant must be recovered by properly certified service personnel 34 Vill Technical Information A Specification and Performance Data 1 AM 50BAE AM 50BAE DS AM 50BAE AD AM 50BAE ADDS SPECIFICATION SHEET MODEL AM 50BAE AM 50BAE DS AM 50BAE AD AM 50BAE ADDS AC SUPPLY VOLTAGE 115 6071 AMPERAGE 3 4 A 5 Min Freeze AT 104 F WT 80 F MINIMUM CIRCUIT AMPACITY 15A MAXIMUM FUSE SIZE 15A ELECTRIC amp WATER CONSUMPTION 90 70 F 70 50 F ELECTRIC W kWH 100 Ibs 238 16 8 227 9 9 WATER gal 24HR gal 100 Ibs 22 0 63 9 30 0 53 7 ICE PRODUCTION PER CYCLE 0 65 Ibs 0 29 kg 24 pcs APPROXIMATE STORAGE CAPACITY 27 Ibs 12 5 kg Bin Control Setting 22 Ibs 10 0 kg REFRIGERANT CHARGE R134a 420z 120g PERFORMANCE DATA MODEL AM 50BAE AM 50BAE DS AM 50BAE AD AM 50BAE ADDS APPROXIMATE ICE AMBIENT TEMP WATER TEMP F C PRODUCTION PER 24 HR F C AU P m 90 32 70 21 80 27 90 32 Ibs day kg day 100 38 APPROXIMATE ELECTRIC 70 21 CONSUMPTION 80 27 90 32 watts 100 38 APPROXIMATE WATER 70 21 CONSUMPTION PER 24 HR 80 27 90 32 gal day m day 100 38 FREEZING CYCLE TIME 70 21 80 27 90 32 min 100 38 HARVEST CYCLE TIME 70 21
9. check FM or PM motor winding continuity fan blade or PM impeller for binding and PM capacitor c HGV and WV Diagnosis Confirm HGV and WV de energize If HGV is energized check for 115VAC at CB B1 P to neutral W If 115VAC is present after PM energizes replace CB If 115VAC is not present and HGV is bypassing replace HGV If WV does not de energize 52 sec after freeze cycle starts check for 115VAC at CB A2 V to neutral W If 115VAC is present 52 sec or later after PM energizes replace CB If 115VAC is not present and WV is leaking by replace WV d Initial Freeze Cycle Termination Diagnosis 5 min FTT terminates harvest cycle starts If not check evaporator temperature where thermistor is mounted and check the thermistor See Il E Thermistor Check If evaporator temperature is below 27 F 3 C for more than 8 min and freeze does not terminate replace CB 5 Normal Harvest Cycle Comp continues HGV and WV energize FM and PM de energize 102 sec WV timer starts CB monitors the warming of the evaporator via the thermistor located on the evaporator When the thermistor reaches 47 F 7 C CB reads 4 5 kO from the thermistor and turns harvest termination over to the 50 sec HT WV is energized during harvest for a maximum of 102 sec or the length of harvest whichever is shorter Note Appliance continues to cycle until BC is satisfied or power is turned off The appliance always restarts at the initial harvest cycle
10. or appliance is unplugged 2 LED 2 Freeze Green LED 2 PM turns on at freeze cycle initiation and turns off at freeze cycle termination 3 LED 3 Harvest Green LED 3 HGV turns on at harvest cycle initiation and turns off at harvest cycle termination D Control Switch The control switch has three positions OFF ICE and WASH In the OFF position power is still present at the DP connector and DP if applicable In the WASH position PM and FM energize after the 50 sec HT terminates C O and earlier Note When in the WASH position FM also energizes Legend BC bin control DP drain pump HGV hot gas valve HT harvest timer EN Zon motor PM pump motor 26 IV Refrigeration Circuit and Component Service Information A WARNING This appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire Move the control switch to the OFF position then unplug the appliance from the electrical outlet before servicing CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after the icemaker is serviced Make sure that none have fallen into the ice storage bin service Make sure all food zones in the icemaker and ice storage bin are clean after A Refrigeration Circuit Service Information A WARNING Repairs requiring the refrigeration circuit to be opened must be performed by
11. properly trained and EPA certified service personnel Use an electronic leak detector or soap bubbles to check for leaks Add a trace of refrigerant to the system if using an electronic leak detector and then raise the pressure using nitrogen gas 140 PSIG Do not use R 134a as a mixture with pressurized air for leak testing NOTICE Always recover the refrigerant and store it in an approved container Do not discharge the refrigerant into the atmosphere Do not leave the system open for longer than 15 min when replacing or servicing parts The Polyol Ester POE oils used in R 134a applications can absorb moisture quickly Therefore it is important to prevent moisture from entering the system when replacing or servicing parts Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made Install the new drier with the arrow on the drier in the direction of the refrigerant flow When brazing protect the drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 1 Refrigerant Recovery No refrigerant access valves are provided on this appliance Using proper refrigerant practices utilize a temporary tap line valve on the high side to recover the refrigerant Store the refrigerant in an approved container Do not discharge the refrigerant into the atmosphere
12. sticking Replace as needed e Normal Harvest Cycle Termination Diagnosis For a thermistor check see ID Thermistor Check If evaporator is warming thermistor reading is correct and harvest does not terminate replace CB 6 Normal Freeze Cycle Comp continues FM and PM energize HGV and WV de energize CB monitors the cooling of the evaporator via the thermistor located on the evaporator for freeze termination When the thermistor drops to 27 F 3 C CB reads 6 8 kO from the thermistor and starts 3 min FT 27 F 3 C or lower must be maintained the entire 3 min If reading rises above 27 F 3 C before 3 min FT terminates 3 min FT resets When 27 F 3 C or lower is maintained for 3 min 5 min FTT starts a Comp Diagnosis If Comp de energizes check PTC relay continuity If open replace PTC If closed check Comp external protector and motor winding continuity Replace as needed If Comp is energized but evaporator is not cooling check for an inefficient Comp See VIII B Performance Data b FM and PM Diagnosis If FM and PM do not energize check for 115VAC at CB B1 P to neutral W and CB A1 LBU to neutral W If 115VAC is present at CB B1 P to neutral W and not at CB A1 LBU to neutral W replace CB If 115VAC is present at CB A1 LBU to neutral W check FM or PM motor winding continuity fan blade or PM impeller for binding and PM capacitor c HGV and WV Diagnosis Confirm HGV and WV de energize
13. 80 27 90 32 min 100 38 HEAD PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 SUCTION PRESSURE 70 21 80 27 90 32 PSIG kg cm G 100 38 TOTAL HEAT OF REJECTION FROM CONDENSER 1850 BTU h AT 90 F 32 C WT 70 F 219C Note 1 We reserve the right to make changes in specifications and design without prior notice 2 Pressure data is recorded at 5 min into freezing cycle The data not in bold should be used for reference only 35 B Wiring Diagrams 1 Auxiliary Code C 0 and Earlier der E fs M amp Li i SE LL gt lt x x 1 ped o O r ze uy m Bai I 69 rz SS D ul TN i e ciie ER x bee A e e NC xs Rd e TLR e I Lu Z Lo Lut A RE EE C z LH e Le Ll re LO 2 N Ge 1 oe Lig Ww 1 zd S LE A AA acd ui P ans SE A ON _ a Y LI a Ier ke ZEN E OLAI S C L 1 Es I lt aE ias P EN C HE gt Lu Lid E r pu IS E r do uod M i i E mod LL ol E 4I e tU LIT Llc CO LIU Le Ince axxo N IL t EAW sL E 1 1 l CY ES we DEED II III za E 36 2 Auxiliary Code C 1 and Later
14. Hoshizaki America Inc Self Contained Cuber Models AM 50BAE AM 50BAE DS AM 50BAE AD AM 50BAE ADDS SERVICE MANUAL A Superior Degree of Reliability www hoshizaki com Number 73126 Issued 12 22 2004 Revised 5 23 2013 A WARNING Only qualified service technicians should install and service the appliance To obtain the name and phone number of your local Hoshizaki Certified Service Representative visit www hoshizaki com No service should be undertaken until the technician has thoroughly read this Service Manual Failure to service and maintain the appliance in accordance with this manual will adversely affect safety performance component life and warranty coverage and may result in costly water damage Proper installation is the responsibility of the installer Product failure or property damage due to improper installation is not covered under warranty Hoshizaki provides this manual primarily to assist qualified service technicians in the service of the appliance Should the reader have any questions or concerns which have not been satisfactorily addressed please call send an e mail message or write to the Hoshizaki Technical Support Department for assistance Phone 1 800 233 1940 770 487 2331 Fax 1 800 843 1056 770 487 3360 E mail techsupport 9 hoshizaki com HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn Hoshizaki Technical Support Department We
15. IMPORTANT The vacuum level and vacuum pump may be the same as those for current refrigerants However the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils 2 Turn on the vacuum pump Open the gauge manifold valves Never allow the oil in the vacuum pump to flow backwards 3 Allow the vacuum pump to pull down to a 29 9 Hg vacuum Evacuating period depends on pump capacity 4 Close the high side valve on the gauge manifold 5 Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder Remember to loosen the connection and purge the air from the hose For the required refrigerant charge see the rating label inside the icemaker Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 latest edition be used 28 6 A liquid charge is recommended when charging an R 134a system Place the service cylinder on the scales if the service cylinder is not equipped with a dip tube invert the service cylinder then place it on the scales Open the high side valve on the gauge manifold 7 Allow the system to charge with liquid until the proper charge weight is met 8 Close the high side valve on the gauge manifold then close the refrigerant access valve if applicable Disconnect the gauge manifold hose 9 Cap the access valve to prevent a possible leak B Component Service Inform
16. ael e oqe sos einjejeduile JI S S 1 4 ulu g e DAO 3 e oqe sesu egnjejeduie JI SjeseJ 4 UE e out JO 99S ZO aull AM ezeeJ jeniui Buunp oes ZG JO senunuoo AM e S9AJ8EH g 9 9 2 8z981J JEWION p 9J 9 9 1S9AJeH IEUUON E 9 9 2 ezoaJJ PIU Z jeniuj f sdeis 9145 lt meys MOL e2uenbes seues 3vagos INV B Service Diagnosis A WARNING The appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death electric shock serious injury or fire Risk of electric shock Use extreme caution and exercise safe electrical practices Risk of electric shock Control switch in OFF position does not de energize all loads optional drain pump Moving parts e g fan blade can crush and cut Keep hands clear CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after the appliance is serviced Make sure that none have fallen into the ice storage bin Make sure all food zones in the appliance are clean after service The diagnostic procedure is a sequence check that allows you to diagnose the electrical system and components Before proceeding check for correct installation proper voltage per nameplate and adequate water supply Note e When checking high voltage 115VAC always choose a white W neutral wire to establish a good neutral connection When checking low voltage 24VAC auxiliary code C 1 and later a
17. ashing LED 3 turns on and Comp HGV and WV energize Initial harvest cycle starts 50 sec HT and 102 sec WVT start Note 24VAC to CB is confirmed with a flashing LED 1 a Power On Diagnosis Confirm green LED 1 is flashing If not confirm appliance is plugged into electrical outlet If optional drain pump HS 0248 or HS 5061 is installed confirm the water level in the drain pump reservoir is not high enough to close the drain pump safety switch When the water level lowers enough to open the drain pump upper float switch power is restored to the icemaker The pump motor remains energized as long as the drain pump lower float switch is closed If optional drain pump is not installed check that jumper connection is good Next check for 115VAC at control switch 2 BR to neutral W then at control switch 1 BR to neutral W If 115VAC is present at 2 BR to neutral W and not at 1 BR to neutral W replace control switch Check BC continuity If open warm BC thermostat bulb with hand See II D Bin Control Check If BC does not close replace BC If BC is closed and LED 1 is not flashing check for 115VAC primary voltage and 24VAC secondary voltage at CT If 115VAC is present and 24VAC is not replace CT If 24VAC is present check for 24VAC at CB B R to CB W LBU If 24VAC is not present check low voltage wiring If 24VAC is present and LED 1 is not on and flashing replace CB b BCH Diagnosis If BCH does not energize check
18. ation NOTICE When replacing a component listed below see the notes to help ensure proper operation Component Nts Install a new drier and PTC relay Hot Gas Valve _ e Replace the strainer Use copper tube of the same diameter and length when replacing valve lines Pump Motor Install a new capacitor Thermistor Attach the new thermistor to the evaporator in the same location as the previous thermistor e Smoothly fill the recessed area of the thermistor holder with high thermal conductive type sealant Hoshizaki America part number 4A0683 01 Silicone Heat Sink Compound 10 8108 manufactured by GC Electronics KE 4560 RTV manufactured by ShinEtsu Silicones or equivalent are recommended e Secure the thermistor with the holder Be very careful to prevent damage to the leads 29 V Maintenance This appliance must be maintained in accordance with the instruction manual and labels provided with the appliance Consult with your local Hoshizaki Certified Service Representative about maintenance service A WARNING Only qualified service technicians should service this appliance Failure to install operate and maintain the appliance in accordance with this manual will adversely affect safety performance component life and warranty coverage Move the control switch to the OFF position and unplug the appliance from the electrical outlet before servicing To reduce the risk of e
19. b Site www hoshizaki com NOTE To expedite assistance all correspondence communication MUST include the following information es Model Number e Serial Number Complete and detailed explanation of the problem IMPORTANT This manual should be read carefully before the appliance is serviced Read the warnings and guidelines contained in this manual carefully as they provide essential information for the continued safe use service and maintenance of the appliance Retain this manual for any further reference that may be necessary CONTENTS ue eege AIDS elle ERR DOT STET 4 I Construction and Water Refrigeration Circuit Diagram un 7 PW 10 o eM Pc a 7 B Water Refrigeration Circuit ELE ppp 8 Il Sequence of Operation and Service Diagnosis pp 9 A Sequence Of Operation Flow CMAN E 9 B Service EE 10 1 Diagnostic Procedure Auxiliary Code C 0 and Earlier 11 2 Diagnostic Procedure Auxiliary Code C 1 and Later sss 14 C BIN COMTOLGHECK c deewioneetetetatecenecnds 17 DE HE Eeer 18 E Diagnose E e E 19 ll Cone Board RE 22 Pe Control Board Re Rec 23 1 Auxiliary Code C 0 and Earlier ae odes bete ex ees Hee oH b trapo pud 23 2 Auxiliary Code C 1 and Later ii eene 24 B Settings GEESS 25 C LED Lights Auxiliary Code C 1 and RE 26 Eeer 26 IV Refri
20. e fails to turn off with the discharge hose restricted or the drain pump fails to pump out the water replace the drain pump Fig 2 Discharge Hose 32 VI Preparing the Icemaker for Periods of Non Use During extended periods of non use extended absences or in sub freezing temperatures follow the instructions below When the appliance is not used for two or three days under normal conditions it is sufficient to move the control switch to the OFF position A WARNING Only qualified service technicians should service this appliance NOTICE During extended periods of non use extended absences or in sub freezing temperatures follow the instructions below to reduce the risk of costly water damage 1 Close the water supply line shut off valve then open the water supply line drain valve 2 Allow the line to drain by gravity Attach a compressed air or carbon dioxide supply to the water supply line drain Move the control switch to the ICE position Blow the water supply line out using the compressed air or carbon dioxide supply Move the control switch to the OFF position Unplug the appliance Close the water supply line drain valve Remove the water tank hose and drain the water tank Optional drain pump remove the drain pump and empty the drain pump reservoir Replace the drain pump in its original position 11 Remove all ice from the ice storage
21. elsouuedl Sloeluoo 89 4 uonejedo 5g uMop sinus seouelldde omg 9IelSOUJeUl sjoejuoo a Jop 99S OL UYUM Ing ulg 1 MHEISeH pue umopinus pezifieue AM pezibieue ASH pezi6ieue ap Wd pezifueue ep AM pezi amp G1eue op ADH pezibieue Wd peziBieue ep ADH pezi6ieue Wd pezi amp ueue AM Il Sequence of Operation and Service D peziBieue W4 peziBJeue ep W4 peziBieue W4 peziBjeue ASH Senulluoo dwog Senulluoo dwog senunuoo dwog pezifueue dwog gien senunuoo HOG senunuoo HOG apis senunuoo HO peziBieue HOG d 14 uiu g esiweuio 13 uiu g esiweuio G SHES J utur g Suejs J UIWW G c pue Seleuluuuel Suejs 4 uiu g sues H 08S 0G pue Seleuluuuel Suejs 4 uiu e O Jeull Zz 14 UE e10U1 10 O3 89 eso 10 OX S y Jeull ezeoJj UE QIOW 10 VJ 89 O 4 42 Noleq 9 4 22 9 4 4 97 Seuoeei O 4 42 Noleq 9 4 22 z SAels 10 S1W U U 0 Sdoup JolsluuuJeu elnljeleduel JolSIueU1 SAels Jo siuJjeu Jj ol sdoup Jojsiuueu LL peziB1eue ep AM 6 t e z Z Z z dnes pus o LAM T LAM oos z8 6 09S ZO 96s c0L 101 U09 03009 UI Ionuoo ut 101 U09 ul ul LH a 0J1u09 ul 101 U09 ul 101 U09 Ul 033009 UI 1H o Lis ulw s 14 uw 3 4 sojsiwey 098 05 gt Joel lt J uw 4 uur g lt Jojsiwiey 26s 05 Jeuous si L4 utu g Buunp 2 3 72 ark lt b L4 ulw Buunp 9 4 22 Je euptuM somey Jo Ul6u
22. ent 3 prong wall outlet If the outlet is a 2 prong outlet it is your personal responsibility to have a qualified electrician replace it with a properly grounded independent 3 prong wall outlet Do not remove the ground prong from the power cord and do not use an adapter plug Failure to properly ground the appliance could result in death or serious injury e The GREEN ground wire in the factory installed power cord is connected to the appliance If it becomes necessary to remove or replace the power cord be sure to connect the power cord s ground wire A WARNING continued Do not make any alterations to the appliance Alterations could result in electric shock serious injury fire or damage Do not use an extension cord Do not use an appliance with a damaged power cord The power cord should not be altered jerked bundled weighed down pinched or tangled Such actions could result in electric shock or fire To unplug the appliance be sure to pull the plug not the cord and do not jerk the cord This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety Children should be properly supervised around this appliance Do not climb stand or hang on the appliance or appliance door or allo
23. ermination Diagnosis 5 min FTT terminates harvest cycle starts If not check evaporator temperature where thermistor is mounted and check the thermistor See Il E Thermistor Check If evaporator temperature is below 27 F 3 C for more than 8 min and freeze does not terminate replace CB 7 Shutdown When the appliance is running hold ice in contact with the thermostatic bulb BC switch opens within 10 sec shutting down the appliance BC is factory set and generally no adjustment is required However adjustment may be needed in some conditions particularly at higher altitude locations Legend BC bin control CB control board Comp compressor FM fan motor FT freeze timer FTT freeze termination timer HGV hot gas valve HT harvest timer PM pump motor WV inlet water valve WVT inlet water valve timer C Bin Control Check BC shuts down the icemaker within 10 sec when ice contacts the thermostatic bulb regardless of the cycle at activation NOTICE When the ambient temperature is below 45 F 7 C BC opens and shuts down the appliance even if the ice storage bin is empty To check BC follow the steps below 1 Move the control switch to the OFF position 2 Unplug the appliance 3 Remove the control box cover Loosen the control box from the base and slide it out for easy access Next clear any ice away from BC bulb 4 5 6 7 Use the wiring diagram to locate the 2 wires supplied to BC Disconnect BC w
24. eze cycle 13 Thermistor See I E Thermistor Check Loose disconnected or defective Di 14 Pump Motor Motor winding open Bearing worn out or locked rotor Defective capacitor 15 Fan Motor Motor winding open Bearing worn out or locked rotor 2 Freeze Up Defrost and clean the icemaker prior to diagnosing freeze up Fill out a freeze up checklist See the Hoshizaki America Technician s Pocket Guide or contact your local distributor for a copy of the freeze up checklist Freeze Up Possible Cause Harvest Cycle 1 Evaporator a Scaled up Damaged 2 Ice Chute Out of position Damaged 3 Control Board Harvest control set too short Do not adjust See III B Settings and Freeze control set too long Adjustments r Defective 4 Bin Control Bin control heater defective See II C Bin Control Check b Defective 5 Thermistor a Loose disconnected or defective See II D Thermistor Check See ee Lee 3 Control Board See III B Settings and Defective Adjustments 4 Thermistor a Defective See E Thermistor Check 5 Refrigerant Charge Low 6 Inlet Water Valve a Leaking by 7 Pump Motor RPM too slow b Impeller damaged 20 3 Low Ice Production 3 Refrigerant Charge 4 Control Board See II Setings and EE Gee llE Thermistor Check 6 Hot Gas Valve 7 inlet Water Valve 8 Compressor 1 Evaporator 2 Inlet Water Valve 3 Hot Ga
25. geration Circuit and Component Service Information sssss 27 A Refrigeration Circuit Service Information EE 27 B Component Service Informatiom ucconsix rid rura A aqu aao RR ex XR ER au RE E REF ERRPERER ER EENS 29 V Maintenant II TI UE TT 30 A M intenance Schedule Meet 30 B Optional Drain Pump HS 0248 or HS 5061 drinnen ct eap gor nana de toan pun 31 VI Preparing the Icemaker for Periods of Non USe pp 33 LANE occ E 34 VAN ed 35 A Specification and Performance Data pp 35 B Wining DIAGFANIS RN TU 36 1 Auxiliary Code C 0 and Earlier nenene 36 2 Auxiliary Code C 1 and LEE 37 3 HS 0248 and HS 5061 Optional Drain Pump pp 38 Important Safety Information Throughout this manual notices appear to bring your attention to situations which could result in death serious injury damage to the appliance or damage to property A WARNING Indicates a hazardous situation which could result in death or serious injury NOTICE Indicates a situation which could result in damage to the appliance or property IMPORTANT Indicates important information about the use and care of the appliance A WARNING The appliance should be destined only to the use for which it has been expressly conceived Any other use should be considered improper and therefore dangerous The manufacturer cannot be held responsible for injury or damage resulting from improper incorrect and unreasonable use Failu
26. he icemaker water supply line shut off valve and drain the water system Clean the water supply inlet screen Inspect Clean if necessary Inspect the water hoses and clean replace if necessary 30 B Optional Drain Pump HS 0248 or HS 5061 If the optional drain pump HS 0248 or HS 5061 is installed test its operation at least once a year as outlined below Note that the pump has power even when the control switch is in the OFF position NOTICE If the optional drain pump is not operating properly or not primed properly HS 0248 it will adversely affect performance component life and warranty coverage and may result in costly water damage 1 Move the control switch to the OFF position then unplug the appliance from the electrical outlet WARNING To reduce the risk of electric shock do not touch the control switch or plug with damp hands 2 Remove all ice from the ice storage bin 3 Plug the appliance back in 4 Slowly pour 24 to 30 oz 710 to 890 ml of water over the ice storage bin drain hole in the ice storage bin 5a HS 0248 If water pumps out properly and the drain pump then de energizes proceed to step 6 If water does not pump out properly and or the drain pump does not de energize follow the steps below to prime the drain pump Priming Instructions a Disconnect the appliance s power cord from the electrical outlet then reconnect to the electrical outlet WARNING To reduce the risk of electric sh
27. he thermistor located on the evaporator for freeze termination When the thermistor drops to 27 F 3 C CB reads 6 8 kO from the thermistor and starts 3 min FT 27 F 3 C or lower must be maintained the entire 3 min If reading rises above 27 F 3 C before 3 min FT terminates 3 min FT resets When 27 F 3 C or lower is maintained for 3 min 5 min FTT starts a Comp Diagnosis If Comp de energizes check PTC relay continuity If open replace PTC If closed check Comp external protector and motor winding continuity Replace as needed If Comp is energized but evaporator is not cooling check for an inefficient Comp See VIII A Specification and Performance Data b FM and PM Diagnosis If FM and PM do not energize check for 115VAC at CB B1 P to neutral W and CB A1 DBU to neutral W If 115VAC is present at CB B1 P to neutral W and not at CB A1 DBU to neutral W replace CB FM If 115VAC is present at CB A1 DBU to neutral W check FM or PM motor winding continuity fan blade or PM impellar for binding and PM capacitor c HGV and WV Diagnosis Confirm HGV and WV de energize If HGV is energized check for 115VAC at CB B1 P to neutral W If 115VAC is present after PM energizes replace CB If 115VAC is not present and HGV is bypassing replace HGV If LED 3 is on after LED 2 turns on replace CB When LED 3 turns off make sure WV is not leaking by If WV is leaking by replace WV d Normal Freeze Cycle T
28. ires Hold your hand around the bulb to warm it up Check for continuity across BC wires If closed continue to step 7 If open replace BC SFE ee Oa fT With the multimeter test leads still in place hold ice in contact with BC bulb BC should open within 10 sec If not BC must be adjusted Installations at higher altitude locations are more likely to require adjustment If BC will not shut down the appliance even after being adjusted replace BC Legend BC bin control D Thermistor Check To check thermistor resistance follow the steps below 1 Move the control switch to the OFF position 2 Unplug the appliance 3 Remove the control box cover 4 Remove the thermistor from the evaporator 5 Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 min 6 Disconnect the thermistor connector from CB and check the resistance between thermistor leads Normal range is 5 5 to 6 5 kO If outside the normal range replace the thermistor See IV B Important Notes for Component Replacement If within the normal range continue to the next step 7 Replace the thermistor in its correct position See IV B Important Notes for Component Replacement 8 Reconnect the thermistor connector to CB 9 Replace the control box cover in its correct position 10 Plug the appliance back into the electrical outlet 11 Move the control switch to the ICE position Legend CB control board Comp compress
29. lectric shock do not touch the control switch or plug with damp hands CHOKING HAZARD Ensure all components fasteners and thumbscrews are securely in place after any maintenance is performed Make sure that none have fallen into the ice storage bin After service make sure that there are no wires pinched between the panels and appliance Make sure you do not damage or pinch the water supply line drain line or power cord A Maintenance Schedule The maintenance schedule below is a guideline More frequent maintenance may be required depending on water quality the appliance s environment and local sanitation regulations Maintenance Schedule fFrequency Area ak Weekly Clean the scoop using a neutral cleaner Rinse thoroughly after cleaning Monthly External Water Check for proper pressure and change if necessary Filters Exterior Wipe down with clean soft cloth Use a damp cloth containing a neutral um to wipe off oil or dirt build up Clean any chlorine staining rust colored spots using a non abrasive cleaner like Zud or Bon Ami Every 3 Ice Storage Bin Maintain as outlined in the instruction manual or maintenance label Months Drain Yearly For aad and Ice Clean and sanitize per the cleaning and sanitizing instructions provided in For aad Bin the instruction manual Optional Drain Test as outlined in V B Optional Drain Pump HS 0248 or HS 5061 Pump HS 0248 or HS 5061 Water Supply Inlet Close t
30. lways choose a light blue LBU neutral wire to establish a good neutral connection When checking component voltage from CB pull CB connectors out slightly to allow room for multimeter test leads contact BCH energizes at startup and continues until the control switch is turned off or power is disconnected Optional drain pump HS 0248 or HS 5061 has 115VAC power supply as soon as the appliance is plugged into the electrical outlet 1 Access the control box and move the control switch to the OFF position 2 Clear any ice from BC 1 Diagnostic Procedure Auxiliary Code C 0 and Earlier 3 Power On Initial Harvest Cycle Move the control switch to the ICE position Comp HGV and WV energize Initial harvest cycle starts 50 sec HT and 102 sec WVT start a Power On Diagnosis If Comp HGV and WV do not energize confirm appliance is plugged into electrical outlet If optional drain pump HS 0248 or HS 5061 is installed confirm the water level in the drain pump reservoir is not high enough to close the drain pump safety switch When the water level lowers enough to open the drain pump upper float switch power is restored to the icemaker The pump motor remains energized as long as the drain pump lower float switch is closed If optional drain pump is not installed check that jumper connection is good Next check for 115VAC at control switch 2 BR to neutral W then at control switch 1 O to neutral W If 115VAC is p
31. needed b HGV Diagnosis If Comp is energized and evaporator is not warming check that HGV energizes and opens If not check for 115VAC at CB C1 BR to neutral W and CB B1 P to neutral W If 115VAC is present at CB C1 BR to neutral W and not at CB B1 P to neutral W replace CB If 115VAC is not present at CB C1 BR to neutral W check wiring connections from BC If 115VAC is present check HGV coil continuity Replace as needed c WV Diagnosis Confirm LED 3 is on If not replace CB If LED 3 is on check that water enters the water tank If not check that the water supply line shut off valve is open and screens or external filters are clear Check for 115VAC at CB C2 BR to neutral W and CB A2 O to neutral W If 115VAC is not present at CB C2 BR to neutral W check wiring from BC If 115VAC is present at CB C2 BR to neutral W and not at CB A2 O to neutral W replace CB If 115VAC is present and WV does not energize check WV coil continuity If open replace WV d FM and PM Diagnosis If FM and PM continue after LED 2 turns off replace CB e Normal Harvest Cycle Termination Diagnosis For a thermistor check see ID Thermistor Check If evaporator is warming thermistor reading is correct and harvest does not terminate replace CB 6 Normal Freeze Cycle LED 1 is flashing and LED 2 is on Comp continues FM and PM energize HGV and WV de energize CB monitors the cooling of the evaporator via t
32. o neutral W and not at CB A2 V to neutral W replace CB If 115VAC is present and WV does not energize check WV coil continuity If open replace WV f Initial Harvest Cycle Termination Diagnosis 50 sec HT terminates and freeze cycle starts If not replace CB 11 4 Initial Freeze Cycle Comp and 102 sec WVT WV continues another 52 sec in freeze cycle continue FM and PM energize HGV de energizes When 102 sec WVT terminates WV de energizes CB monitors the cooling of the evaporator via the thermistor located on the evaporator for freeze termination When the thermistor drops to 27 F 3 C CB reads 6 8 kO from the thermistor and starts 3 min FT 27 F 3 C or lower must be maintained the entire 3 min If reading rises above 27 F 3 C before 3 min FT terminates 3 min FT resets When 27 F 3 C or lower is maintained for 3 min 5 min FTT starts a Comp Diagnosis If Comp de energizes check PTC relay continuity If open replace PTC If closed check Comp external protector and motor winding continuity Replace as needed If Comp is energized but evaporator is not cooling check for an inefficient Comp See VIII B Performance Data b FM and PM Diagnosis If FM and PM do not energize check for 115VAC at CB B1 P to neutral W and CB A1 LBU to neutral W If 115VAC is present at CB B1 P to neutral W and not at CB A1 LBU to neutral W replace CB If 115VAC is present at CB A1 LBU to neutral W
33. ock do not touch the power cord with damp hands b Slowly pour another 24 to 30 oz 710 to 890 ml of water over the storage bin drain hole in the storage bin If not already energized the drain pump should energize c Confirm that water is discharged through the discharge hose The drain pump should then de energize If not repeat steps a through c until water is discharged through the discharge hose and the drain pump de energizes The drain pump is primed when the drain pump de energizes d If water now pumps out properly and the drain pump de energizes proceed to step 6 If water still does not pump out properly and or the drain pump does not de energize replace as needed 5b HS 5061 If water pumps out properly and the drain pump then de energizes proceed to step 6 If water does not pump out confirm 115VAC to drain pump replace as needed Priming does not apply to HS 5061 6 Move the control switch to the ICE position 7 Pour another 24 to 30 oz 710 to 890 ml of water into the ice storage bin then completely restrict the discharge hose while the drain pump is operating See Fig 2 Pour more water into the ice storage bin until the appliance turns off The drain pump will continue to operate Check for leaks 31 8 Remove the discharge hose restriction and allow the water to be pumped out normally Power to the appliance will be restored when the water in the drain pump returns to a normal level 9 If the applianc
34. or 18 E Diagnostic Tables 1 No Ice Production No Ice Production Possible Cause 1 Power Supply 2 Water Supply 3 Optional Drain Pump HS 0248 or HS 5061 4 Control Switch 5 Thermostatic Bin Control See II C Bin Control Check 6 Control Transformer 115VAC 24VAC Auxiliary Code C 1 and Later 7 Control Board a Unplugged off blown fuse or tripped breaker Not within specifications Water supply off or improper water pressure External water filters clogged Safety switch open Connector loose or disconnected Clogged or kinked hose Defective In OFF or WASH position Out of adjustment Open with bin filled with ice Ambient temperature too cool Cum o a OQjojo ojo me joloj o Bulb out of position Bin control heater defective gt Defective a Defective Defective 8 Compressor External protector defective PTC defective 9 Inlet Water Valve CO a Screen or orifice clogged Coil winding open Inlet water valve remains open longer than 52 sec in initial freeze cycle or remains open in normal freeze cycle m CH 10 Hot Gas Valve Closed in harvest cycle Open in freeze cycle 11 Inlet Water Valve o Na Screen or orifice clogged Coil winding open Water valve open in freeze cycle Closed in harvest cycle o 12 Hot Gas Valve Open in fre
35. ppliance is cleaned and sanitized See V B Optional Drain Pump HS 0248 or HS 5061 for details If the optional drain pump is not operating properly or not primed properly HS 0248 water could back up and overflow leading to costly water damage f water collects in the bin and will not drain turn off the appliance and close the water supply line shut off valve e f water seeps from the base of the appliance turn off the appliance and close the water supply line shut off valve Failure to do so could lead to costly water damage Do not leave the appliance on during extended periods of non use extended absences or in sub freezing temperatures To properly prepare the appliance for these occasions follow the instructions in VI Preparing the Appliance for Periods of Non Use Keep ventilation openings in the appliance enclosure or in the built in structure clear of obstruction Do not place objects on top of the appliance The ice storage bin is for ice use only Do not store anything else in the ice storage bin L Construction and Water Refrigeration Circuit Diagram A Construction Top Panel Ice Making A CL Mechanism Fla Bin Control Thermostat Scoop Holder We Bulb Slope nnm Tih 9
36. r 52 sec in freeze cycle continue FM and PM energize HGV de energizes When 102 sec WVT terminates LED 3 turns off and WV de energizes CB monitors the cooling of the evaporator via the thermistor located on the evaporator for freeze termination When the thermistor drops to 27 F 3 C CB reads 6 8 kO from the thermistor and starts 3 min FT 27 F 3 C or lower must be maintained the entire 3 min If reading rises above 27 F 3 C before 3 min FT terminates the 3 min FT resets When 27 F 3 C or lower is maintained for 3 min 5 min FTT starts a Comp Diagnosis If Comp de energizes check PTC relay continuity If open replace PTC If closed check Comp external protector and motor winding continuity Replace as needed If Comp is energized but evaporator is not cooling check for an inefficient Comp See VIII B Performance Data b FM and PM Diagnosis If FM and PM do not energize check for 115VAC at CB B1 P to neutral W and at CB A1 DBU to neutral W If 115VAC is present at CB B1 P to neutral W and not at CB A1 DBU to neutral W replace CB If 115VAC is present at CB A1 DBU to neutral W check FM or PM motor winding continuity fan blade or PM impeller for binding and PM capacitor c HGV and WV Diagnosis Confirm HGV and WV de energize If HGV is energized check for 115VAC at CB B1 P to neutral W If 115VAC is present after PM energizes replace CB If 115VAC is not present and HGV is bypassing
37. re to service and maintain the appliance in accordance with this manual will adversely affect safety performance component life and warranty coverage and may result in costly water damage To reduce the risk of death electric shock serious injury or fire follow basic precautions including the following Only qualified service technicians should install and service the appliance The appliance must be installed in accordance with applicable national state and local codes and regulations Failure to meet these code requirements could result in death electric shock serious injury fire or damage To reduce the risk of electric shock do not touch the control switch or plug with damp hands Make sure the control switch is in the OFF position before plugging in or unplugging the appliance Before servicing move the control switch to the OFF position Unplug the appliance from the electrical outlet The appliance requires an independent power supply of proper capacity See the nameplate for electrical specifications Failure to use an independent power supply of proper capacity can result in a tripped breaker blown fuse damage to existing wiring or component failure This could lead to heat generation or fire THE APPLIANCE MUST BE GROUNDED The appliance is equipped with a NEMA 5 15 three prong grounding plug L to reduce the risk of potential shock hazards It must be plugged into a properly grounded independ
38. replace HGV If LED 3 does not turn off and WV does not de energize 52 sec after freeze cycle starts check for 115VAC at CB A2 O to neutral W If 115VAC is present 52 sec or later after PM energizes replace CB If 115VAC is not present and WV is leaking by replace WV d Initial Freeze Cycle Termination Diagnosis 5 min FTT terminates harvest cycle starts If not check evaporator temperature where thermistor is mounted and check the thermistor See Il E Thermistor Check If evaporator temperature is below 27 F 3 C for more than 8 min and freeze does not terminate replace CB 5 Normal Harvest Cycle LED 1 is flashing and LED 3 is on Comp continues HGV and WV energize FM and PM de energize 102 sec WV timer starts CB monitors the warming of the evaporator via the thermistor located on the evaporator When the thermistor reaches 47 F 7 C CB reads 4 5 kO from the thermistor and turns harvest termination over to the 50 sec HT WV is energized during harvest for a maximum of 102 sec or the length of harvest whichever is shorter Note Appliance continues to cycle until BC is satisfied or power is turned off The appliance always restarts at the initial harvest cycle a Comp Diagnosis Check that evaporator is warming If not confirm Comp is energized If not check for 115VAC at PTC and check PTC relay continuity If open replace PTC If closed check Comp external protector and motor winding continuity Replace as
39. resent at 2 BR to neutral W and not at 1 O to neutral W replace control switch Check BC continuity If open warm BC thermostat bulb with hand See II D Bin Control Check If BC does not close replace BC If BC is closed and HGV or WV is not energized check for 115VAC at CB U BK to CB V W If 115VAC is not present check wiring If 115VAC is present see d HGV Diagnosis or e WV Diagnosis below b BCH Diagnosis If BCH does not energize check BCH continuity If open replace BCH c Comp Diagnosis If Comp does not energize check PTC relay continuity If open replace PTC If closed check Comp external protector and motor winding continuity Replace as needed d HGV Diagnosis If Comp is energized and evaporator is not warming check that HGV energizes and opens If not check for 115VAC at CB C1 BK to neutral W and at CB B1 P to neutral W If 115VAC is present at CB C1 BK to neutral W and not at CB B1 P to neutral W replace CB If 115VAC is not present at CB C1 BK check wiring connections from BC If 115VAC is present check HGV coil continuity Replace as needed e WV Diagnosis Check that water enters the water tank If not check that the water supply line shut off valve is open and screens or external filters are clear Check for 115VAC at CB C2 BK to neutral W and CB A2 V to neutral W If 115VAC is not present at CB C2 BK check wiring from BC If 115VAC is present at CB C2 BK t
40. s Valve 4 Condenser a Clogged 5 Thermistor a Loose disconnected or defective See Il E Thermistor Check 6 Control Board Adjustments 7 Refrigerant Charge a 8 Compressor a Inefficient or off 9 Pump Motor a RPM too slow 21 Ill Control Board A Hoshizaki exclusive control board is employed in AM series appliances All models are pretested and factory adjusted NOTICE Fragile handle very carefully The control board contains integrated circuits which are susceptible to failure due to static discharge It is especially important to touch the metal part of the icemaker when handling or replacing the control board e Do not touch the electronic devices on the control board or the back of the control board Do not change wiring and connections Do not short out power supply to test for voltage Always replace the whole control board assembly if it goes bad 22 A Control Board Layout 1 Auxiliary Code C 0 and Earlier C1 Connector e B1 Connector 115VAC X1 Relay Component Power Supply hot gas valve pump motor fan motor Hot Gas Valve A1 Connector Pump Motor X1 Relay Fan Motor Hot Gas Valve C2 Connector Pump Motor 115VAC X2 Relay Component Power Supply Fan Motor inlet water valve A2 Connector Inlet Water Valve e X2 Relay Luc Inlet Water Valve E LL Control Transformer Freeze Control ZS
41. the factory default setting will result in freeze up and or damage to the appliance a Initial Harvest Terminated by 50 sec harvest timer No temperature requirement b Normal Harvest Terminated by temperature 47 F 7 C and time 50 sec harvest timer Once the thermistor warms to 47 F 7 C CB reads 4 5 kO from the thermistor and turns harvest termination over to the 50 sec harvest timer 2 VR2 Freeze Control VR2 freeze control is for adjustment of the freeze cycle completion temperature controls size of hole in ice cube If adjustment to cube hole size is desired follow the instructions below See Fig 1 NOTICE Do not adjust VR2 to the lowest temperature setting This will result in freeze up a Larger Hole Turn VR2 freeze control clockwise for a higher freeze cycle completion temperature WARM for shorter freeze time and ice cubes with larger diameter holes b Smaller Hole Turn VR2 freeze control counterclockwise for a lower freeze cycle completion temperature COLD for longer freeze time and ice cubes with smaller diameter holes Control Board Freeze Control Harvest Control Adjustment of freeze cycle Do not adjust eee completion temperature COLD WARM COLD WARM DN Fig 1 25 C LED Lights Auxiliary Code C 1 and Later 1 LED 1 24VAC Green LED 1 flashes to indicate proper 24VAC and continues to flash unless BC is open control switch is moved to the OFF position
42. w children or animals to do so Do not climb into the appliance or allow children or animals to do so Death or serious injury could occur or the appliance could be damaged Be careful not to pinch fingers when opening and closing the door Be careful when opening and closing the door when children are in the area Open and close the door with care Door opened too quickly or forcefully may cause injury or damage to the appliance or surrounding equipment Do not use combustible spray or place volatile or flammable substances near the appliance They might catch fire Keep the area around the appliance clean Dirt dust or insects in the appliance could cause harm to individuals or damage to the appliance Do not place anything on top of the appliance Foreign objects or moisture could enter the appliance and result in electric shock or fire NOTICE Protect the floor when moving the appliance to prevent damage to the floor e When making water supply or drain line repairs follow the requirements found in the instruction manual to reduce the risk of costly water damage n areas where water damage is a concern confirm appliance is installed in a contained area with a floor drain Confirm the appliance is in a location that stays above freezing Normal operating ambient temperature must be within 45 F to 100 F 7 C to 38 C e f using the optional drain pump HS 0248 or HS 5061 test its operation every time the a
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