Hoshizaki KM-1601SAH/3 manual

Hoshizaki “A Superior Degr ee of Reliability” www .hoshizaki.com Models KM-1601SAH/3 KM-1601SWH/3 KM-1601SRH/3 Stackable Crescent Cuber Hoshizaki America, Inc. SE RV ICE MA NU AL ™ Number: 73145 Issued: 10-31-2006 Revised: 6-24-2011[...]

2 IMPOR T ANT Only quali ed ser vice technicians should inst all, ser vice , and maintain the icemaker . No ser vice or maint enance should be under tak en until the t echnician has thoroughl y read this Ser vice Manual. F ailure t o ser vice and maintain the equipment in accordance with this man ual ma y adver sely af fect saf et y , perf orman[...]

3 CONTENTS Impor tant Saf et y Inf or mation ................................................................................................. 5 I. Specications ...................................................................................................................... 6 A. Icemaker .....................................................[...]

4 B. W iring Diagr ams .......................................................................................................... 40 1 . KM-1 60 1SAH (air -cooled)....................................................................................... 40 2. KM-1 60 1S AH3 (air -cooled) ................................................................[...]

5 Impor tant Safety Inf ormation Throughout this man ual, notices appear t o bring your at tention t o situations which could result in death, serious injur y , or damage to the unit. W ARNING Indicates a hazar dous situation which could r esult in death or serious injury . C A UTION Indicates a sit uation which could result in dama ge to the unit.[...]

6 I. Specications A. Icemaker 1 . KM-1 60 1SAH (air -cooled) Note: We r eser v e the r ight t o make changes in specications and design without prior notice. AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 15.0 A ( 5 Min. Freeze AT 104°F / W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E IC[...]

7 2. KM-1 60 1SAH3 (air -cooled) Note: We r eser v e the r ight t o make changes in specications and design without prior notice. AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 12.0 A ( 5 Min. Freeze AT 104°F / W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Ambient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°[...]

8 Note: We r eser v e the r ight t o make changes in specications and design without prior notice. 3. KM-1 60 1SWH (w ater -cooled) AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 13.4 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP.[...]

9 AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 9.0 A ( 5 Min. Freeze AT 104°F / W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Ambient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1555 (705) 1558 (707) 1466 (665) Referenc e without *mark s 80 1557 (706) 1562 (708) 1417 (643) [...]

10 5. KM-1 60 1SRH with URC-21F (r emote air-cooled) (auxiliary codes: R-0; R-1; some S-1) This data applies t o units with an 8 l/min w at er v al v e . The 8 l/min water v alv e is par t number 3U0 1 1 1 -02 and has J248-032 stamped on the side of the v alv e f acing the rear of the unit. Note: We r eser v e the r ight t o make changes in speci?[...]

11 AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 12.8 A ( 5 Min. Freeze AT 104°F / W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Ambient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1564 (709) 1547 (702) 1468 (666) Referenc e without *mark s 80 [...]

12 7 . KM-1 60 1SRH with URC-22F (r emote air -cooled) (auxiliar y codes: S-2 and later) This data applies t o units with an 1 1 l/min wat er v al v e . The 1 1 l/min wat er v al v e is either par t number 4A1 1 7 6-04 or 4A5251 -04 and has the par t number stamped on the side of the v al v e f acing the front of the unit. Note: We r eser v e the r[...]

13 8. KM-1 60 1SRH3 with URC-21F (r emote air -cooled) (auxiliar y codes: R-0; R-1; some S-1) This data applies t o units with an 8 l/min w at er v al v e . The 8 l/min water v alv e is par t number 3U0 1 1 1 -02 and has J248-032 stamped on the side of the v alv e f acing the rear of the unit. Note: We r eser v e the r ight t o make changes in spec[...]

14 AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 7.9 A ( 5 Min. Freeze AT 104°F / W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Ambient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1585 (719) 1563 (709) 1464 (664) Referenc e without *mark s 80 1568 (711) 1535 (696) 1396 (633)[...]

15 1 0. KM-1 60 1SRH3 with URC-22F (remote air -cooled) (auxiliar y codes: S-2 and later) This data applies t o units with an 1 1 l/min wat er v al v e . The 1 1 l/min wat er v al v e is either par t number 4A1 1 7 6-04 or 4A5251 -04 and has the par t number stamped on the side of the v al v e f acing the front of the unit. Note: We r eser v e the [...]

16 B. Condenser Unit 1 . URC-21F Note: We r eser v e the r ight t o make changes in specications and design without prior notice. AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker) FAN MOTOR 115 V Total 2.6FLA 130W EXTERIOR DIMENSIONS (WxDxH) 46-3/8" x 15-11/16" x 25-15/16" (1178 x 398 x 659 mm) DIMENSIONS INCLUDING LEGS (WxDxH) [...]

17 2. URC-22F Note: We r eser v e the r ight t o make changes in specications and design without prior notice. AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker) FAN MOTOR 115 V Total 2.6FLA 130W EXTERIOR DIMENSIONS (WxDxH) 46-3/8" x 15-11/16" x 25-15/16" (1178 x 398 x 659 mm) DIMENSIONS INCLUDING LEGS (WxDxH) 48-7/16" x 18-[...]

18 II. General Inf ormation A. Construction 1 . KM-1 60 1SAH/3 (air -cooled) Ev aporat or Assembl y Spra y T ubes Inlet W ater V alv e (WV) W ater Supply Inlet Hot Gas V alv e (HGV) Junction Bo x Air -Cooled Condenser Check V alv es Contr ol Bo x Drier T ransf ormer Box KM-1 60 1SAH3 Contr ol S witch Compr essor (Comp) Float S witch (F/S) W ater P [...]

19 2. KM-1 60 1SWH/3 (w ater -cooled) Ev aporat or Assembl y Spra y T ubes W ater Supply Inlet Junction Bo x W ater -Cooled Condenser Check V alv es Contr ol Bo x W ater Regulating V alv e (WR V) Drier C apacitor Bo x (KM-1 60 1SWH) T ransf ormer Box (KM-1 60 1SWH3) Contr ol S witch Cleaning V alve P ump-Out Check V alv e Cube Guides Compr essor (C[...]

20 3. KM-1 60 1SRH/3 (r emote air -cooled) Ev aporat or Assembl y Spra y T ubes W ater Supply Inlet Junction Bo xes Receiv er Check V alv es Contr ol Bo x Drier Capacit or Box (KM-1 60 1SRH) T ransf ormer Box (KM-1 60 1SRH3) Contr ol S witch Cleaning V alve P ump-Out Check V alv e Inlet W ater V alv e (WV) Compr essor (Comp) Float Switch (F/S) W at[...]

21 B. Sequence of Operation 1 . Sequence Cy c les and Shutdo wn a) KM-1 60 1SAH/3 "G" Contr ol Boar d IMPOR T ANT KM-1 60 1SAH/3 utiliz e a "G" contr ol boar d and TBC . F or KM-1 60 1SAH/3 operation, the K4 jumper (4A4883G0 1) must be in place on the contr ol board RED K4 connector or the unit will not oper at e . The steps in [...]

22 continues until F/S opens and t erminates the cy cle. Ther e is a 1 5 second delay bef ore CB ackno wledges an open F/S. (4) P ump-Out C ycle LEDs 1, 3, and 2 ar e on. LED 4 is on when S4 dip s witch 3 & 4 are set t o 3 of f and 4 on. F or details , see "II.C.3.c) P ump-Out Timer (S4 dip s witch 3 & 4)." C A UTION! Do not adjus[...]

23 b) KM-1 60 1SWH/3 and KM-1 60 1SRH/3 "E" Control Boar d IMPOR T ANT KM-1 60 1SWH/3 and KM-1 60 1SRH/3 utilize an "E" contr ol board and TBC . The steps in the sequence ar e as outlined below . When pow er is supplied, CB r ed "PO WER OK" LED turns on. There is a 5-second dela y befor e star tup . Note that the order[...]

24 (5) Harvest C ycle Same as the initial harvest cy cle. See "II.B.1 .b)(2) Initial Harvest C ycle ." Note: Unit continues t o cy cle until TBC is satis ed or power is turned of f . The unit alw a ys rest ar ts at the 1 -minute  ll cy cle. (6) Shutdown When ice cont acts TBC bulb (TBC s witch open), TBC shuts down the unit within 1[...]

25 2. Sequence Flow Chart a) KM-1 60 1SAH/3 "G" Contr ol Boar d F/S check 1 to 3-min. timer in control (S4 dip switch 1 & 2) "G" Contr ol Boar d Sequence Flow Chart 1 . 1 -Minute F ill Cycl e Cyc le Steps 2. Harvest Cy cle • WVtime: 6min. orthelengthofharvestminus0or 50 sec. (S4 di[...]

26 F/S check 1 to 3-min. timer in control (S4 dip switch 1 & 2) "E" Contr ol Boar d Sequence Flow Chart 1 . 1 -Minute F ill Cycl e Cyc le Steps 2. Harvest Cy cle • WVtime: 6min. orthelengthofharvest,whiche ver is shor ter . •Maximumharvesttime: 20min.  Thermistor in control 3. [...]

27 C. Control Boar d • A Hoshizaki e x clusive contr ol board is emplo yed in Hoshizaki Stac kab le Cr escent Cubers . • All models are pr etest ed and f actor y set. • F or a contr ol boar d chec k pr ocedur e, see "IV .B . Contr ol Boar d Chec k." C A UTION 1 . The control boar d is fragile; handle very carefull y . 2. Th[...]

28 1 . Contr ol Boar d Lay out a) KM-1 60 1SAH/3 "G" Contr ol Boar d "G" Control Boar d P ar t Number 2A3792-0 1 "G" Contr ol Boar d • "ALARM RESET" But ton • "OUTPUT TEST" But ton (used to t est r ela ys on contr ol board) • WHITE K3 Connector Har v est Contr ol (thermistor) • RED K4 Connec[...]

29 • "ALARM RESET" But ton • "OUTPUT TEST" But ton (used to t est r ela ys on contr ol board) • WHITE K3 Connector Har v est Contr ol (thermistor) • RED K4 Connector Mechanical Bin Contr ol (open on units with thermostatic bin control) • Label (control boar d r e vision le vel indicat ed on label on side of rela y) •[...]

30 2. LED Lights and Audib le Alarm Saf eties a) KM-1 60 1SAH/3 "G" Contr ol Boar d At star tup , a 5-second delay occur s while the control boar d conducts an int er nal timer check. A beep occurs when the contr ol switch is mo ved t o the "ICE" position. The red LED indicat es proper contr ol v oltage and remains on unless a c[...]

31 b) KM-1 60 1SWH/3 and KM-1 60 1SRH/3 "E" Control Boar d At star tup , a 5-second delay occur s while the control boar d conducts an int er nal timer check. A beep occurs when po wer is tur ned of f. The red LED indicat es proper contr ol v oltage and r emains on unless a control v oltage pr oblem occur s. The gr een LEDs 1 through 4 en[...]

32 3. Controls and Adjustments C A UTION Dip s witches ar e f actor y set. F ailure t o maintain f actory set tings ma y adver sel y af fect perf or mance and warr anty cov erage . F or mor e inf ormation, contact Hoshizaki T echnical Suppor t at 1 -800-233-1 940. a) Default Dip S witch Set tings Note that the set tings var y f or KM-1 60 1SRH/3 de[...]

33 b) Harvest Timer (S4 dip switch 1 & 2) The har v est timer star ts when the thermistor r eads 48°F (9°C) at the e vaporat or outlet and the control boar d reads the thermistor's 3.9 kΩ signal. The har vest timer is f actor y set, and generall y no adjustment is r equir ed. Howe ver , a set ting longer than the f actor y set ting may [...]

34 d) Pump-Out F requenc y Control (S4 dip switch 5 & 6) The pump-out frequenc y contr ol is f actor y set t o drain the w ater tank e very 1 0 cycles (e x cept f or KM-1 60 1SRH/3 utilizing 3U0 1 1 1 -02 water v alv e), and generally no adjustment is requir ed. Howe v er , where w ater quality is bad and the icemaker needs a pump-out more of t[...]

35 (2) Bin Control Select or , KM-160 1SWH/3 & KM-1 60 1SRH/3 "E" Control Boar d F actory set for pr oper operation. Do not adjust. W hen set t o the on position on a unit with a ther mostatic bin contr ol, a 5-beep alar m sounds (open circuit) and the unit does not operat e . KM-1 60 1SWH/3 & KM-1 60 1SRH/3 "E" Control [...]

36 D . Contr ol Switch The control s witch has three positions: "OFF" for po wer of f, "ICE" f or icemaking, and "W ASH" t o activat e the wat er pump when cleaning and sanitizing.[...]

37 III. T echnical Infor mation A. W at er Cir cuit and R efr igeration Cir cuit 1 . KM-1 60 1SAH/3 (air -cooled) W at er Supply Cleaning V alv e Float Switch Drain P ump-Out Check V alv e Thermostatic Expansion V alves Compr essor Hot Gas Va l v e Check V alv es High-P ressure Switch Strainer Drier Condenser Evapor ator Low -Side Ser vice Va l v e[...]

38 2. KM-1 60 1SWH/3 (w ater -cooled) W at er Supply Cleaning V alv e Float Switch Drain Thermostatic Expansion V alves Compr essor Hot Gas Va l v e Check V alv es High-P ressure Switch Strainer Drier Condenser Evapor ator Low -Side Ser vice Va l v e Discharge Line Suction Line W at er P ump Thermistor Spra y T ubes Inlet W ater V alv e Pump-Out W [...]

39 High-Side V apor Ser vice Va l v e Low -Side Ser vice Va l v e 3. KM-1 60 1SRH/3 (r emote air -cooled) W at er Supply Cleaning V alv e Float Switch Drain Thermostatic Expansion V alves Compr essor Hot Gas Va l v e Check V alv es High-P ressure Switch Strainer Drier Condenser Evapor ator Discharge Line Suction Line W at er P ump Thermistor Spra y[...]

40 B. W iring Diagr ams 1 . KM-1 60 1SAH (air -cooled) T ransformer Output 1 0.5V at 1 15V * * High-Pr essure Switc h Cut-Out 41 2± 21 PSIG Cut-In 327±21 PSIG 0[...]

41 2. KM-1 60 1SAH3 (air -cooled) T ransformer Output 1 0.5V at 1 15V * * High-Pr essure Switc h Cut-Out 41 2± 21 PSIG Cut-In 327±21 PSIG 0[...]

42 3. KM-1 60 1SWH (w ater -cooled), KM-1 60 1SRH (remot e air -cooled) * High-Pr essure Switc h W ater-Cooled Model Remot e Model Cut-Out 384± 21 PSIG 41 2± 21 PSIG Cut-In 284±21 PSIG 327±21 PSIG 0 0 * T ransformer Output 1 0.5V at 1 15V[...]

43 4. KM-1 60 1SWH3 (w ater -cooled), KM-1 60 1SRH3 (remot e air -cooled) T ransformer Output 1 0.5V at 1 15V * * High-Pr essure Switc h W ater-Cooled Model Remot e Model Cut-Out 384± 21 PSIG 41 2± 21 PSIG Cut-In 284±21 PSIG 327±21 PSIG 0 0[...]

44 C. P erf ormance Data 1 . KM-1 60 1SAH (air -cooled) Note: 1 . P ressur e data is recor ded at 5 minutes int o freezing cy cle. The data not in bold should be used f or r ef erence onl y . 2. W e r eserve the right to mak e changes in specications and design without prior notice. 70/21 1462 663 1427 647 1307 593 80/27 1435 651 1381 627 1221 5[...]

45 2. KM-1 60 1SAH3 (air -cooled) Note: 1 . P ressur e data is recor ded at 5 minutes int o freezing cy cle. The data not in bold should be used f or r ef erence onl y . 2. W e r eserve the right to mak e changes in specications and design without prior notice. 70/21 1456 660 1423 646 1313 596 80/27 1431 649 1381 626 1234 560 90/32 1423 646 1345[...]

46 3. KM-1 60 1SWH (w ater -cooled) Note: 1 . P ressur e data is recor ded at 5 minutes int o freezing cy cle. The data not in bold should be used f or r ef erence onl y . 2. W e r eserve the right to mak e changes in specications and design without prior notice. 70/21 1492 677 1501 681 1419 643 80/27 1499 680 1513 686 1378 625 90/32 1501 681 15[...]

47 Note: 1 . P ressur e data is recor ded at 5 minutes int o freezing cy cle. The data not in bold should be used f or r ef erence onl y . 2. W e r eserve the right to mak e changes in specications and design without prior notice. 4. KM-1 60 1SWH3 (w ater -cooled) 70/21 1555 705 1558 707 1466 665 80/27 1557 706 1562 708 1417 643 90/32 1558 707 1[...]

48 5. KM-1 60 1SRH with URC-21F (r emote air-cooled) (auxiliary codes: R-0; R-1; some S-1) This data applies t o units with an 8 l/min w at er v al v e . The 8 l/min water v alv e is par t number 3U0 1 1 1 -02 and has J248-032 stamped on the side of the v alv e f acing the rear of the unit. 70/21 1583 718 1550 703 1435 651 80/27 1558 707 1507 684 1[...]

49 6. KM-1 60 1SRH with URC-21F (r emote air -cooled) (auxiliar y codes: some S-1; S-2 and later) This data applies t o units with a 1 5 l/min or 1 1 l/min wat er val ve. The 1 5 l/min wat er v al v e is par t number 3U0 1 1 1 -0 1 and has J248-030 stamped on the side of the v al v e f acing the rear of the unit. The 1 1 l/min water v alv e is eith[...]

50 7 . KM-1 60 1SRH with URC-22F (r emote air -cooled) (auxiliar y codes: S-2 and later) This data applies t o units with an 1 1 l/min wat er v al v e . The 1 1 l/min wat er v al v e is either par t number 4A1 1 7 6-04 or 4A5251 -04 and has the par t number stamped on the side of the v al v e f acing the front of the unit. Note: 1 . P ressur e data[...]

51 8. KM-1 60 1SRH3 with URC-21F (r emote air -cooled) (auxiliar y codes: R-0; R-1; some S-1) This data applies t o units with an 8 l/min w at er v al v e . The 8 l/min water v alv e is par t number 3U0 1 1 1 -02 and has J248-032 stamped on the side of the v alv e f acing the rear of the unit. Note: 1 . P ressur e data is recor ded at 5 minutes int[...]

52 9. KM-1 60 1SRH3 with URC-21F (r emote air -cooled) (auxiliar y codes: some S-1; S-2 and later) This data applies t o units with a 1 5 l/min or 1 1 l/min wat er val ve. The 1 5 l/min wat er v al v e is par t number 3U0 1 1 1 -0 1 and has J248-030 stamped on the side of the v al v e f acing the rear of the unit. The 1 1 l/min water v alv e is eit[...]

53 1 0. KM-1 60 1SRH3 with URC-22F (remote air -cooled) (auxiliar y codes: S-2 and later) This data applies t o units with an 1 1 l/min wat er v al v e . The 1 1 l/min wat er v al v e is either par t number 4A1 1 7 6-04 or 4A5251 -04 and has the par t number stamped on the side of the v al v e f acing the front of the unit. Note: 1 . P ressur e dat[...]

54 IV . Service Diagnosis W ARNING 1 . This unit 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 . 2. Risk of electr ic shock. Use e xtreme caution and e x ercise saf e electr ical practices . 3. Moving par ts (e.g ., f an blade) can crush and cut. [...]

55 4) Initial Harvest Cy c le – LEDs 1, 4, and 2 are on. WV and X1 1 rela y (KM-1 60 1SAH/3) remain ener gized, Comp , FM/FMR, HGV , and X1 0 rela y (KM-1 60 1S AH/3) energize . CBmonitor s the war ming of the e vapor at or via the ther mist or locat ed on the suction line. When the thermistor reaches 48°F (9°C), CB r eads a 3.9 kΩ signal f[...]

56 5) F r eeze Cyc le – LED 1 is on. Comp and FM/FMR remain ener gized, PM energiz es or , f or KM-1 60 1SAH/3, r emains energized. LL V ener gizes . HGV and X1 0 rela y (KM-1 60 1SAH/3) de-ener giz e. The unit is held in freez e by a 5-minut e shor t cy cle prot ection timer (CB will not accept a signal from F/S during the rst 5 min ut es of [...]

57 Diagnosis: KM-1 60 1SAH/3 "G" CB: If PM does not re ver se, chec k to see if S4 and S5 dip s witch set tings are in the f actory default position. If S4 dip s witch 3 and 4 ar e adjusted t o 3 of f and 4 on, WV and har v est pump timer rela ys ener gize. Once these rela ys ener gize, PM r otates in the fr eeze cy cle r otation. See &qu[...]

58 B. Control Boar d Check Bef or e r eplacing 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 whit e neutral wir e to estab lish a good neutral connection when checking v oltages. Alar m R eset: If CB [...]

59 C. Bin Control Chec k T o check TBC , follo w the st eps below . C A UTION When the ambient t emperature is belo w 45°F (7°C), TBC s witch opens and shuts down the icemak er ev en if the ice storage bin is empty . When TBC is set in the prohibit ed range, the icemak er operates continuousl y ev en if the ice stor age bin is  lled with ice. [...]

60 D . Float S witch Check and Cleaning F/S is used to det er mine that there is suf ficient w ater in the wat er tank af ter the 1 -minute ll c y cle and af ter each harvest cy cle. F/S is also used to determine that the appropriate v olume of wat er has been conv er t ed into ice bef ore s witching out of the freez e cy cle. No adjustment is r[...]

61 2. Float Switc h Cleaning Depending on local wat er conditions, scale ma y b uild up on F/S . Scale on the switch can cause the  oat t o stic k. In this case, F/S should be cleaned. 1) T ur n of f the po wer suppl y . 2) Remo ve the fr ont panel, then mo v e the contr ol s witch to the "OFF" position. 3) Remo ve the insulation panel[...]

62 E. Thermist or Check T o check thermistor resist ance , f ollow the steps belo w . 1) T ur n of f the po wer suppl y . 2) Remo ve the fr ont panel, then mo v e the contr ol s witch to the "OFF" position. 3) Remo ve the contr ol bo x cov er . 4) Remo ve the thermistor . 5) Immerse the thermistor sensor por tion in a glass containing ice[...]

63 G. Diagnostic Charts Bef or e consulting the diagnostic char ts, chec k for corr ect installation, proper v oltage per unit nameplate , and adequate wat er supply . Check the control boar d using the steps in "IV .B. Contr ol Boar d Chec k." Chec k the dip s witch set tings to assur e that S4 dip switch 3, 4, 7 , 8, 9, 1 0 and S5 (KM-1[...]

64 No Ice Pr oduction - Possib le Cause 13 . Inlet W ater V alv e a) Mesh lter or orice clogged. b) Coil winding open. c) Open in freez e cy cle. 14 . Float Switch See "IV .D . Float S witch Check and Cleaning." a) Float does not mov e freely . b) Def ectiv e. 15 . Compr essor a) Compr essor r ela y/magnetic contact or contacts bad [...]

65 2. F reeze Up Defrost and clean the unit prior t o diagnosing fr eeze up . See "VI.A. Cleaning and Sanitizing Instructions." F reeze Up - P ossible Cause Harvest Cy cle 1. Evapor at or a) Scaled up . b) Damaged. 2. Separator s a) Out of position. b) Damaged. 3. Cube Guide a) Out of position. b) Damaged. 4. Inlet W ater V alv e a) W ate[...]

66 F reeze Up - P ossible Cause 7. Inlet W ater V alv e a) Leaking by . 8. Float Switch See "IV .D . Float S witch Check and Cleaning." a) Float does not mov e freely . b) Def ectiv e. 9. P ump Motor a) RPM too slow . b) Impeller damaged. 10 . Ther mostatic Expansion V alv e (TXV) a) Def ectiv e. 1 1. Headmaster (C .P .R.) (r emote conden[...]

67 Low Ice P r oduction - P ossible Cause 6. Control Boar d See "IV .B. Control Boar d Check." a) Float s witch connection loose (K5). b) Def ectiv e. 7. Hot Gas V alv e a) Erratic or open. 8. Inlet W ater V alv e a) Leaking by . 9. Float Switch See "IV .D . Float S witch Check and Cleaning." a) Float does not mov e freely or de[...]

68 V . R eplacement of Components W ARNING 1 . This unit should be diagnosed and repair ed onl y b y quali ed ser vice personnel t o reduce the risk of death, electr ic shoc k, serious injur y , or re . 2. Mov e the contr ol s witch t o the "OFF" position and turn of f the pow er suppl y bef or e ser vicing . Lock out/T agout to pr [...]

69 2. Brazing W ARNING 1 . R-404A itself is not  ammable at atmospheric pr essur e and t emperatur es up to 1 7 6°F (80°C). 2. R-404A itself is not explosiv e or poisonous. Howe ver , when exposed t o high temper atur es (open  ames), R-404A can be decomposed to f or m h y dr ouoric acid and carbonyl uoride both of which are hazar dou[...]

70 4) Close the high and low -side val v es on the gauge manif old. 5) Disconnect the gauge manif old hose from the v acuum pump and at tach it t o a refrigerant service cylinder . Remember t o loosen the connection and purge the air from the hose . For air -cooled and wat er -cooled models, see the nameplat e for the requir ed refrigerant char ge.[...]

71 B. Impor tant Not es f or Component R eplacement C A UTION When r eplacing a component listed belo w , see the notes t o help ensur e pr oper operation. Component Notes Compr essor Install a ne w start capacitor , r un capacit or , and star t rela y . Thermostatic Expansion V alve • At tachthethermostatice xpansionv alv ebulb[...]

72 VI. Cleaning and Maintenance This icemaker m ust be cleaned and maintained in accor dance with the instr uction manual and labels pr o vided with the icemak er . Consult with your local distrib ut or about cleaning and maintenance service. T o obtain the name and phone number of your local distrib ut or , visit www .hoshizaki.com or call Hoshiza[...]

73 1 . Cleaning P r ocedur e 1) Dilute 27  . oz. (800 ml) of Hoshizaki "Scale A wa y" with 5 gal. (1 9 l) of war m w at er . 2) Remo ve all ice fr om the e vaporat or and the storage bin. Note: T o r emov e cubes on the ev aporat or , tur n of f the power suppl y and tur n it back on af ter 3 minut es. The har vest cy cle star ts and t[...]

74 21) Remo ve the fr ont panel and full y open the cleaning v al v e. 22) Mov e the control s witch to the "W ASH" position. 23) Replace the fr ont panel in its correct position. 24) T ur n on the power suppl y to rinse of f the cleaning solution. 25) T ur n of f the po wer suppl y aft er 5 minutes . 26) Remo ve the fr ont panel and the [...]

75 B. Maintenance This icemaker m ust be maintained individuall y , ref erring to the instruction manual and labels pro vided with the icemaker . W ARNING 1 . Only quali ed ser vice technicians should service this icemaker . 2. Mov e the contr ol s witch t o the "OFF" position and turn of f the pow er suppl y bef or e ser vicing . Lock[...]

76 4) Allow the line t o drain by gr a vity . 5) At tach a compressed air or carbon dio xide supply t o the icemaker wat er supply line drain v alv e . 6) Mov e the control s witch to the "ICE" position. 7) Replace the fr ont panel in its correct position, then turn on the power suppl y . 8) Blow the icemak er water suppl y line out using[...]