Hoshizaki Condensing Unit Models SRK-14J/3 manual

Hoshizaki “A Superior Degr ee of Reliability” www .hoshizaki.com Model KMS-1401MLJ Including Condensing Unit Models SRK-14J/3 Modular Crescent Cuber Serenity Series Hoshizaki America, Inc. Number: 73192 Issued: 12-28-2011 SE RV ICE MA NU AL[...]

2 W ARNING Only quali ed ser vice technicians should inst all and ser vice the icemak er . 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 ................................................................................................. 5 I. Specications ...................................................................................................................... 7 A. Icemaker .....................................................[...]

4 D . Contr ol and Ser vice Switches ..................................................................................... 23 1 . Contr ol Switch ........................................................................................................ 23 2. Ser vice Switch .............................................................................[...]

5 Impor tant Safety Inf ormation Throughout this man ual, notices appear t o bring your at tention t o situations which could result in death, serious injur y , damage t o the icemaker , or damage to pr oper 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[...]

6 W ARNING, continued F or KMS • P ow er suppl y and gr ound connection ar e supplied fr om the SRK r emot e condensing unit via the wire harness pro vided. Do not connect the wire harness leads to an e xt ernal power sour ce . • Wir e harness routing (conduit) and disconnect (if r equired) m ust meet national, stat e , and local electrical cod[...]

7 AC SUPPLY VOLTAGE 115VAC Supplied by SRK-14J via Factory Supplied W ire Harnes s APPROXIMAT E ICE PRODUCTION Ambient W ATER T EMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lb./day ( kg/day ) 70 *1420 (644) 1379 (626) 1278 (580) Reference without *m arks 80 1389 (630) 1325 (601) 1199 (544) 90 1379 (626) *1280 (581) 1162 (527) 100 1344 (609) 1252 (568[...]

8 2. KMS-1 40 1MLJ with SRK-14J3 Note: We r eserve the right to mak e changes in specications and design without prior notice. Data P ending[...]

9 AC SUPPLY VOLTAGE 208-230/60/1 ( 3 wire with neutral for 115V ) (115VAC Supplied to KMS via Factory Wire Harness) AMPERAGE 13.5 A ( 5 Min. Freeze AT 104°F / WT 80°F ) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A EXTERIOR DIMENSIONS (WxDxH) 50" x 17" x 28" ( 1270 x 432 x 711 mm ) DIMENSIONS INCLUDING LEGS (WxDxH) 52-3/8&qu[...]

10 2. SRK-1 4J3 Note: We r eserve the right to mak e changes in specications and design without prior notice. Data P ending[...]

11 II. General Inf ormation A. Construction 1 . Icemaker Spra y T ubes Hot Gas V alv e Liquid Line V alv e Ser vice V alv e (High Side) Drier W ash V alv e Ser vice V alv e (Low Side) Fill/R ell W ater V alv e (WV1) Contr ol Boar d P ump Motor Float S witch Drain W ater V alve Contr ol S witch Ser vice S witch Har v est W ater V alv e (WV2) Ther[...]

12 2. Condensing Unit Condenser Headmaster (C .P .R.) Hot Gas V alv es Liquid Line V alv e Receiv er Accum ulator Shut-Of f V alv e (Low Side) Thermostat (Discharge Pipe) Compr essor Shut-Of f V alve (High Side) F an Motor s and F an Blades Check V alv e High P ressur e S witch SRK-1 4J Control Bo x SRK-1 4J3 Control Bo x F use F use[...]

13 B. Sequence of Operation 1 . Sequence Cycles and Shutdo wn The steps in the sequence ar e as outlined below . When pow er is supplied, the r ed "PO WER OK" LED and the gr een "BC CLOSED" LED on the CB turn on (If yello w "BC OPEN" LED is on, the icemaker will not st ar t. In this case clear ice awa y from BC actuato[...]

14 d) Pump-Out Cy cle LEDs 1, 3, and 2 ar e on . Comp and FMRs r emain ener gized, HGVs and X1 0 rela y energiz e. LL Vs de-energize . PM stops f or 2 seconds, then X1 1 rela y energizes , allowing PM and D V to ener gize f or 1 0 or 20 seconds (S4 dip switch 3 & 4). W at er is r emov ed from the bot tom of the wat er tank and sent down the dr [...]

15 • Minimum freez e time: 5 min. • Maximum freez e time: freeze timer set ting (S4 dip switch 9 & 1 0). 2. Sequence Flow Chart Components Energized when the Contr ol S witch is in the "SER VICE" P osition When in the "SER VICE" position, the control s witch supplies pow er to the service switch and the icemak er is in s[...]

16 C. Control Boar d • A Hoshizaki e x clusive contr ol board is emplo yed in the Hoshizaki icemak er s. • All models are pr etest ed and f actor y adjust ed. • F or a contr ol boar d chec k pr ocedur e, see "IV .B . Contr ol Boar d Chec k." NO TICE • F ragile, handle v er y carefull y . • The control boar d contains integ rat e[...]

17 1 . Control Board Lay out "G" Control Boar d P ar t Number 2A3792-0 1 "G" Contr ol Boar d • P ow er LED (red) (lights when 1 0.5V AC is supplied to K2 connect or) • LED 3 (X3 Rela y) LED 3 on: K1 Connect or Pin #5 (energiz ed during har v est pump timer) LED 3 of f: K1 Connect or Pin #4 (energiz ed in freez e) • LED 4 ([...]

18 2. LED Lights and Audib le Alarm Saf eties At star tup , a 5-second delay occur s while the control boar d conducts an int er nal timer check. A beep occur s when the control s witch is mov ed to the "ICE" position. The red LED indicates pr oper control v oltage and remains on unless a contr ol v oltage prob lem occurs . The green LEDs[...]

19 3. Controls and Adjustments NO TICE 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 The dip s witches ar e f actor y -adjusted t o the fol[...]

20 c) Pump-Out Timer (S4 dip switch 3 & 4) The 1st pump-out occurs af ter the 1 1th freeze c y cle , then e ver y 1 0th cycle ther eaf t er . When a pump-out is called f or , the X1 0rela y is energiz ed and the X1 3 rela y is de-energiz ed to allow the dr ain v alv e t o ener gize . The pump motor st ops f or 2seconds, then the X1 1 rela[...]

21 e) Harvest P ump Timer (S4 dip switch 7) NO TICE F actory set for pr oper operation. Do not adjust. Adjustment outside of the f actor y def ault set ting ma y r esult in damage t o the icemak er . Depending on the har v est pump timer set ting, the pump mot or either sta ys of f or is energiz ed the last 50 seconds of har vest. When the pump mot[...]

22 h) Float S witch Select or (S5 dip s witch 1) NO TICE Do not adjust. This must be lef t in the f actor y def ault position or the icemaker will not operat e corr ectl y . On icemaker s with a double  oat switch, the  oat s witch select or det er mines which  oat s witch (upper or lo wer) the contr ol board monitor s for r ell initiat[...]

23 D . Contr ol and Ser vice S witches 2 s witches ar e used t o contr ol the operation of the icemak er . These switches ar e ref erred to as contr ol switch and service switch. They ar e located on the KMS s witch box. 1 . Control S witch The control s witch has three positions: "OFF" f or pow er of f; "ICE" for icemaking , an[...]

24 Spra y T ube KMS-1 40 1MLJ Har v est W at er V alv e W at er Supply W ash V alve Liquid Line V alv e Drier Ser vice V alve Liquid Line V alv e Shutof f Va l v e SRK-1 4J/3 Fa n Condenser Headmaster (C .P . R.) Check V alv e Access V alv e Hot Gas V alv es Strainer s High-P ressure Switch Thermostat Discharge Line Compr essor Receiv er Accum ulat[...]

25 B. W iring Diagrams 1 . KMS-140 1MLJ with SRK-1 4J * High-P ressur e S witch Cut-out 426± 22 PSIG Cut-in 341±22 PSIG 0 Ther mostat S witch Cut-out 266°F±9°F (130°C± 5°C) Cut-in 239°F±9°F (1 1 5°C±5°C) ** * ** Contr ol T ransf or mer Output 1 0.5V at 1 15V[...]

26 2. KMS-1 40 1MLJ with SRK-14J3 * High-P ressur e S witch Cut-out 426± 22 PSIG Cut-in 341±22 PSIG 0 Ther mostat S witch Cut-out 266°F±9°F (130°C± 5°C) Cut-in 239°F±9°F (1 1 5°C±5°C) ** * ** Contr ol T ransf or mer Output 1 0.5V at 1 15V[...]

27 3. Wir e Harness Connections Cont actor HGV L LV Neutral F use 1 0A CB HGV L LV Neutral SRK Condensing Unit W ir e Harness Connections BR V P BK W BR GR GND V P BK W GR BR V P BK W GR BR V P BK W GND Legend: GND-gr ound HGV -hot gas v al v e CB-control boar d LL V -liquid line v alv e L2-single phase pow er supply L3-three phase po wer suppl y W[...]

28 C. P erf ormance Data 1 . KMS-140 1MLJ with SRK-1 4J 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 reser v e the right to mak e changes in specications and design without prior notice. 70/21 1420 644 1379 626 1278 580 80/27 1389 630 1325 601 1199 [...]

29 2. KMS-1 40 1MLJ with SRK-14J3 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 reser v e the right to mak e changes in specications and design without prior notice. Data P ending[...]

30 IV . Service Diagnosis W ARNING • This icemaker should be diagnosed and r epaired 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 . • Risk of electric shock. Use extr eme caution and ex ercise saf e electr ical practices . • Moving par ts (e .g ., f an b lade) can crush an[...]

31 4) Initial Harvest Cy c le – LEDs 1, 4, and 2 are on. Comp , FMRs, HGVs , X1 0 rela y , WV2, X1 2, and X1 3 r ela ys ener gize . WV1 de-ener giz es. CBmonitor s the war ming of the e v aporator via the thermistor locat ed on the suction line. When the thermistor r eaches 48°F (9°C), CB reads 3.9 kΩ fr om the ther mistor and turns har ves[...]

32 5) F r eeze Cyc le – LED 1 and 4 are on. Comp , FMRs, and PM r emain energized (CB K1 connector pin #5 (DB U wir e) de-ener giz es and K1 connect or pin #4 (R wire) ener gizes to pr ev ent PM interruption). LL Vs energize . WV1 and LED 4 energize f or 1 min. HGVs, X1 0, X1 1, and X1 3 r ela ys de-energiz e. Re ll – LEDs 1 and 4 are on. Th[...]

33 6) Pump-Out Cy cle – LEDs 1, 3, and 2 are on (1 0/20 second pump-out) – The 1st pump-out occurs af ter the 1 1th freeze c y cle , then e ver y 1 0th cycle ther eaf t er . Comp and FMRs remain ener gized. HGVs and X1 0 rela y energiz e. LL Vs de-ener gize . PMde-energiz es for 2 seconds , then X1 1 rela y energiz es, allo wing PM and D V t[...]

34 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. Alar m R eset: If CB is in alar m (beeping), press the "ALARM RESET" b ut ton on CB while CB is beeping. W ARNING!?[...]

35 C. Bin Control Chec k and Cleaning This icemaker uses a BC with a le v er -actuated pr oximity s witch t o contr ol the ice le vel in the stor age bin. No adjustment is requir ed. 1 . Bin Control Check T o check BC , follo w the st eps belo w . 1) T ur n of f the power suppl y . 2) Remo ve the fr ont panel, then mo v e the contr ol s witch to th[...]

36 2. Bin Control Cleaning Scale ma y b uild up on BC . Scale can cause the actuator paddle and magnet t o stick. In this case, BC should be cleaned. W ARNING CHOKING HAZARD: Ensure all components , fast eners, and thumbscr ews ar e securel y in place af t er the icemak er is ser viced. Make sur e that none ha v e fallen into the dispenser unit/st [...]

37 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 det er mine that the appr opriate v olume of wat er has been conv er ted int o ice befor e switching out of the fr eez e cy cle. No adjustment i[...]

38 20) Reconnect F/S connect or to CB K5 (b lac k) connect or , then r eplace the contr ol bo x cov er , r ight side, and t op panels in their correct positions. 21) Mov e the control s witch to the "ICE" position. 22) Replace the fr ont panel in its correct position. 23) T ur n on the power suppl y to star t the aut omatic icemaking pr o[...]

39 E. Thermist or Chec k T o check thermistor r esistance , f ollow the steps belo w . 1) T ur n of f the power 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 t op and right side panels, then r emov e the control bo x cov er . 4) Remo ve the thermistor . 5) Immerse the thermis[...]

40 F . Diagnostic Charts 1 . No Ice Production No Ice Pr oduction - Possib le Cause 1. P ower Suppl y a) Of f, b lown fuse , or tripped break er . b) Not within specications. 2. Main T ransf ormer (208-230V AC/1 1 5V A C) (3 Phase Only) a) V oltage tap s witch not set t o pr oper v oltage . b) Coil winding open or shor t ed. 3. Wat er Supply a) [...]

41 No Ice Pr oduction - Possib le Cause 15 . Compr essor a) Compr essor r ela y/magnetic contact or contacts bad or coil winding open. b) Star t capacit or or run capacitor def ectiv e (single phase onl y). c) Int ernal protect or open. d) Star t r ela y contacts bad or coil winding open (single phase onl y). e) P rot ect or tripped. f) Compr essor[...]

42 F reeze-Up - P ossible Cause 6. Float Switch See "IV .D . Float S witch Chec k and Cleaning" a) Dir ty , sticking . b) Def ectiv e. 7. Refrigerant Char ge a) L o w. 8. Control Boar d See "II.C .3. Contr ols and Adjustments" and "IV .B. Contr ol Board Chec k" a) Har v est timer (S4 dip s witch 1 & 2) set t oo sho[...]

43 3. Low Ice P r oduction Low Ice P r oduction - P ossible Cause Long Harvest Cy cle 1. Ev aporat or a) Scaled up . 2. Spray T ubes and/or Spra y Guides a) Dir ty . b) Out of position. 3. Refrigerant Charge a) L o w. 4. Wat er Supply a) Low w ater pr essure. b) External wat er lt ers clogged. c) Insuf ficient wat er line siz e. Minimum 3/8"[...]

44 V . R eplacement of Components W ARNING • This icemaker should be diagnosed and r epaired 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 . • Mov e the control s witch to the "OFF" position and turn off the po wer supply bef or e ser vicing . Lock out/T agout to pr[...]

45 2. Brazing W ARNING • R-404A itself is not  ammab le at atmospheric pressur e and temperatur es up t o 1 7 6°F (80°C). • R-404A itself is not e xplosiv e or poisonous. Howe ver , when exposed t o high temper atur es (open  ames), R-404A can be decomposed to f or m hy drouoric acid and carbonyl uoride both of which are hazar dou[...]

46 2) T ur n on the vacuum pump . Open the gauge manif old val v es , then open the high and low -side refrigerant shutof f val v es . Nev er allow the oil in the v acuum pump t o  ow backw ards. 3) Allow the v acuum pump to pull down t o a 29.9" Hg vacuum. Ev acuating period depends on pump capacity . 4) Close the low -side val v e and hig[...]

47 B. Impor tant Not es f or Component R eplacement NO TICE When r eplacing a component listed belo w , see the notes t o help ensur e pr oper operation. Component Notes Compr essor 1 Phase: Install a new st ar t capacitor , r un capacitor , and star t rela y . 3 Phase: Install a new magnetic cont actor . Thermostatic Expansion V alve • At tach t[...]

48 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 Hoshizaki C er ti ed Ser vice R epr esentativ e about cleaning and maintenance ser vice. W ARNING • Only quali ed ser vice technicians should service thi[...]

49 1 . Cleaning Procedur e 1) Dilute 22  . oz. (650 ml) of Hoshizaki "Scale A wa y" with 4 gal. (1 5 l) of warm water . 2) Remo ve all ice fr om the e vaporat or and the dispenser unit/storage bin. Note: T o r emov e cubes on the e v aporat or , tur n of f the po wer suppl y and turn it back on af ter 3 minut es. The har vest cy cle st[...]

50 21) Remo ve the fr ont panel. 22) Mov e the control s witch to the "SER VICE" position, then mov e the ser vice s witch t o 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 power suppl y af ter 5 min utes . 26) [...]

51 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 • Only quali ed ser vice technicians should service this icemaker . • Mov e the control s witch to the "OFF" position and turn off the po wer supply t o the SRK condensing unit b[...]

52 C. Pr eparing the Icemak er f or Per iods of Non-Use NO TICE • When st oring the icemaker f or an ext ended time or in sub-freezing t emperatur es, f ollo w the instructions below t o pr e v ent damage. • T o pre vent damage t o the w ater pump , do not operat e the icemaker with the control s witch in the "SER VICE" position when [...]

53 F ill/Re ll W ater V alv e F ill/Re ll W ater V alv e Hose 1 7) F rom the tee on the dr ain hose , b low out the dr ain v alv e using compr essed air or carbon dio xide . 1 8) Mov e the ser vice s witch to the "CIRC ." position and the control s witch to the "OFF" position. 1 9) T ur n of f the power suppl y . 20) Recon[...]

54 VII. Disposal This icemaker cont ains 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.[...]