Hoshizaki America, Inc.

Transcription

1 Hoshizaki America, Inc. Modular Crescent Cuber Serenity Series Model KMS-1401MLH Including Condensing Unit Models SRK-14H/3 A Superior Degree of Reliability SERVICE MANUAL Number: Issued:

2 IMPORTANT Only qualified service technicians should attempt to install, service, or maintain this icemaker. No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual. Failure to service and maintain the equipment in accordance with this manual may adversely affect safety, performance, and warranty coverage. Hoshizaki provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write, or send an message to the Hoshizaki Technical Support Department for assistance. HOSHIZAKI AMERICA, INC. 6Highway 74 South Peachtree City, GA Attn: Hoshizaki Technical Support Department Phone: Technical Service (770) Fax: (770) Web Site: NOTE: To expedite assistance, all correspondence/communication MUST include the following information: Model Number Serial Number Complete and detailed explanation of the problem. 2

3 IMPORTANT This manual should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualified service technicians should install, service, and maintain the icemaker. Read the warnings contained in this booklet carefully as they give important information regarding safety. Please retain this booklet for any further reference that may be necessary. CONTENTS Important Safety Information... 5 I. Specifications... 7 A. Icemaker KMS-1401MLH with SRK-14H KMS-1401MLH with SRK-14H B. Condensing Unit SRK-14H SRK-14H C. Condensing Unit Dimensions...11 II. General Information A. Construction Icemaker Condensing Unit B. Sequence of Operation Sequence Cycles and Shutdown a) 1-Minute Fill Cycle b) Initial Harvest Cycle c) Freeze Cycle d) Pump-Out Cycle e) Harvest Cycle f) Shutdown Sequence Flow Chart C. Control Board Control Board Layout LED Lights and Audible Alarm Safeties Controls and Adjustments a) Default Dip Switch Settings b) Harvest Timer (S4 dip switch 1 & 2) c) Pump-Out Timer (S4 dip switch 3 & 4) d) Pump-Out Frequency Control (S4 dip switch 5 & 6) e) Harvest Pump Timer (S4 dip switch 7) f) Factory Use (S4 dip switch 8) g) Freeze Timer (S4 dip switch 9 & 10) h) Float Switch Control (S5 dip switch 1) i) Refill Counter (S5 dip switch 2 through 5)

4 D. Control and Service Switches Control Switch Service Switch a) DRAIN b) CIRC c) WASH III. Technical Information A. Water Circuit and Refrigeration Circuit B. Wiring Diagrams KMS-1401MLH with SRK-14H KMS-1401MLH with SRK-14H Wire Harness Connections C. Performance Data KMS-1401MLH with SRK-14H KMS-1401MLH with SRK-14H IV. Service Diagnosis A. Diagnostic Procedure B. Control Board Check C. Bin Control Check and Cleaning Bin Control Check Bin Control Cleaning D. Float Switch Check and Cleaning Float Switch Check Float Switch Cleaning E. Thermistor Check F. Diagnostic Charts No Ice Production Evaporator is Frozen Up Low Ice Production Abnormal Ice Other V. Replacement of Components A. Service for Refrigerant Lines Refrigerant Recovery Brazing Evacuation and Recharge (R-404A) B. Important Notes for Component Replacement VI. Cleaning and Maintenance A. Cleaning and Sanitizing Instructions Cleaning Procedure Sanitizing Procedure - Following Cleaning Procedure B. Maintenance C. Preparing the Icemaker for Long Storage

5 Important Safety Information Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, or damage to the unit. WARNING CAUTION IMPORTANT Indicates a hazardous situation which could result in death or serious injury. Indicates a situation which could result in damage to the unit. Indicates important information about the use and care of the unit. WARNING This icemaker 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. To reduce the risk of death, electric shock, serious injury, or fire, follow basic precautions including the following: Only qualified service tecnicians should install, service, and maintain the icemaker. Move the control switch to the "OFF" position and turn off the power supply to the SRK condensing unit before servicing the KMS or SRK. Place the KMS disconnect (if applicable) in the off position. Lockout/Tagout to prevent the power supply from being turned back on inadvertently. Do not make any alterations to the unit. Alterations could result in electric shock, injury, fire, or damage to the unit. For KMS Power supply and ground connection are supplied from the SRK remote condensing unit via the wire harness provided. Do not connect the wire harness leads to an external power source. Wire harness routing (conduit) and disconnect (if required) must meet national, state, and local electrical code requirements. Failure to meet these code requirements could result in death, electric shock, serious injury, fire, or severe damage to equipment. THE ICEMAKER MUST BE GROUNDED. Failure to properly ground the icemaker could result in death, serious injury, or severe damage to equipment. 5

6 For SRK Electrical connection must be hard-wired and must meet national, state, and local electrical code requirements. Failure to meet these code requirements could result in death, electric shock, serious injury, fire, or severe damage to equipment. The remote condensing unit requires an independent power supply of proper capacity. See the nameplate for electrical specifications. Failure to use a properly sized breaker or fuse can result in a tripped breaker, blown fuses, or damage to existing wiring. This could lead to heat generation or fire. THE REMOTE CONDENSING UNIT MUST BE GROUNDED. Failure to properly ground the remote condensing unit could result in death or serious injury. 6

7 I. Specifications A. Icemaker 1. KMS-1401MLH with SRK-14H AC SUPPLY VOLTAGE 115VAC Supplied by SRK-14H via Factory Supplied Wire Harness AMPERAGE 15.3 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. ( F) PER 24 HR. Temp.( F) lbs./day ( kg/day ) 70 *1311 (595) 1278 (580) 1194 (542) Reference without *marks (583) 1236 (560) 1129 (512) (580) *1200 (544) 1101 (499) (566) 1177 (534) 1010 (458) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 26 lbs. (11.9 kg) 1248pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70 F 70/50 F ELECTRIC W (kwh/100 lbs.) 2630(5.25) 2400(4.40) WATER gal./24hr (gal./100 lbs.) 294(24.5) 644(49.1) CEC/CEE TIER LEVEL 1 ENERGY STAR NO EXTERIOR DIMENSIONS (WxDxH) KMS-1401MLH: 30"x24"x28" (762 x 610 x 711 mm) SRK-14H: 50"x17"x28" (1270 x 432 x 711 mm) EXTERIOR FINISH KMS-1401MLH: Stainless Steel, Galvanized Steel (Rear) SRK-14H: Galvanized Steel WEIGHT KMS-1401MLH: Net 143 lbs. (65 kg), Shipping 177 lbs. (80 kg) SRK-14H: Net 230 lbs. (104 kg), Shipping 273 lbs. (124 kg) CONNECTIONS - ELECTRIC Wire Harness Connection from SRK to KMS - WATER SUPPLY Inlet 1/2" FPT - DRAIN Outlet 3/4" FPT -CONDENSATION 5/8" OD Tube -REFRIGERATION Suction Line 1-1/16"-12 UNF Fitting (#10 PARKER) Liquid Line 5/8"-18 UNF Fitting (#6 PARKER) CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Level Switch and Timer COMPRESSOR Hermetic, Model CS18K6E-PFV CONDENSER Air-Cooled Remote, Condenser Unit SRK-14H EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve Headmaster (C.P.R.) (160 PSI) REFRIGERANT CHARGE R404A, 16 lb. 5 oz. (7400g) (Icemaker 0 lbs. 7 oz. Cond. Unit 15 lbs. 14 oz.) DESIGN PRESSURE High 467PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-Out ( Internal ) COMPRESSOR PROTECTION Auto-Reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-Reset High-Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A -REQUIRED Ice Storage Bin or Dispenser Condensing Unit: SRK-14H OPERATING CONDITIONS VOLTAGE RANGE VAC AMBIENT TEMP. KMS-1401MLH F SRK-14H (Outdoor Use) F WATER SUPPLY TEMP F WATER SUPPLY PRESSURE PSIG Note: We reserve the right to make changes in specifications and design without prior notice. 7

8 2. KMS-1401MLH with SRK-14H3 AC SUPPLY VOLTAGE 115VAC Supplied by SRK-14H via Factory Supplied Wire Harness AMPERAGE 13.8 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. ( F) PER 24 HR. Temp.( F) lbs./day ( kg/day ) 70 *1305 (592) 1265 (574) 1178 (534) Reference without *marks (578) 1213 (550) 1107 (502) (574) *1170 (531) 1069 (485) (561) 1146 (520) 977 (443) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 25 lbs. (11.3 kg) 1248pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70 F 70/50 F ELECTRIC W (kwh/100 lbs.) 2440(5.00) 2230(4.10) WATER gal./24hr (gal./100 lbs.) 310(26.5) 676(51.8) CEC/CEE TIER LEVEL 1 ENERGY STAR NO EXTERIOR DIMENSIONS (WxDxH) KMS-1401MLH: 30"x24"x28" (762 x 610 x 711 mm) SRK-14H3: 50"x17"x28" (1270x432x711 mm) EXTERIOR FINISH KMS-1401MLH: Stainless Steel, Galvanized Steel (Rear) SRK-14H3: Galvanized Steel WEIGHT KMS-1401MLH: Net 143 lbs. (65 kg), Shipping 177 lbs. (80 kg) SRK-14H3: Net 230 lbs. (104 kg), Shipping 273 lbs. (124 kg) CONNECTIONS - ELECTRIC Wire Harness Connection from SRK to KMS - WATER SUPPLY Inlet 1/2" FPT - DRAIN Outlet 3/4" FPT -CONDENSATION 5/8" OD Tube - REFRIGERATION Suction Line 1-1/16"-12 UNF Fitting (#10 PARKER) Liquid Line 5/8"-18 UNF Fitting (#6 PARKER) CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Level Switch and Timer COMPRESSOR Hermetic, Model CS18K6E-TF5 CONDENSER Air-Cooled Remote, Condenser Unit SRK-14H3 EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve Headmaster (C.P.R.) (160 PSI) REFRIGERANT CHARGE R404A, 16 lb. 5 oz. (7400g) (Icemaker 0 lbs. 7 oz. Cond. Unit 15 lbs. 14 oz.) DESIGN PRESSURE High 467PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-Out ( Internal ) COMPRESSOR PROTECTION Auto-Reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-Reset High-Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A -REQUIRED Ice Storage Bin or Dispenser Condensing Unit: SRK-14H3 OPERATING CONDITIONS VOLTAGE RANGE VAC AMBIENT TEMP. KMS-1401MLH F SRK-14H3 (Outdoor Use) F WATER SUPPLY TEMP F WATER SUPPLY PRESSURE PSIG Note: We reserve the right to make changes in specifications and design without prior notice. 8

9 B. Condensing Unit 1. SRK-14H AC SUPPLY VOLTAGE /60/1 (3 wire with neutral for 115VAC) (115VAC Supplied to KMS via Factory Wire Harness) AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE EXTERIOR DIMENSIONS (WxDxH) DIMENSIONS INCLUDING LEGS (WxDxH) EXTERIOR FINISH 15.3 A (5 Min. Freeze AT 104 F/WT 80 F) 20 A 20 A 50"x17"x28" (1270x432x711 mm) 52-3/8"x19-1/2"x43" (1330x495x1092 mm) Galvanized steel WEIGHT Net 230 lb. (104 kg) Shipping 273 lb. (124 kg) CONNECTIONS - ELECTRIC Main Power Supply: Permanent Connection SRK to KMS: Wire Harness Connection - REFRIGERANT Liquid line 1-1/16-12 UNF Fitting (#10 Parker) Suction line 1-1/8-12 UNF Fitting (#11 Parker) COMPRESSOR CONDENSER COMPRESSOR PROTECTION FAN MOTOR PROTECTION REFRIGERANT CIRCUIT PROTECTION REFRIGERANT CONTROL Hermetic, Model CS18K6E-PFV Air-Cooled, Fin and Tube type Auto-Reset Overload Protector (Internal) Thermal Protection Auto-Reset High-Pressure Switch Headmaster (C.P.R.) (160 PSI) REFRIGERANT CHARGE 404A, 16 lb. 5 oz. (7400 g) (Condensing Unit: 15 lb. 14 oz.) (7200 g) (Icemaker: 0 lb. 7.0 oz.) (200 g) DESIGN PRESSURE High 467 PSIG, Low 230 PSIG OPERATING CONDITIONS VOLTAGE RANGE VAC AMBIENT TEMP. (Outdoor use) F ACCESSORIES -SUPPLIED Leg 2 pcs Hex Head Bolt w/washer M8 x pcs Hex Nut M8 16 pcs -REQUIRED Compatible KMS Icemaker Note: We reserve the right to make changes in specifications and design without prior notice. 9

10 2. SRK-14H3 AC SUPPLY VOLTAGE /60/3 (115VAC Supplied to KMS via Factory Wire Harness) AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE EXTERIOR DIMENSIONS (WxDxH) DIMENSIONS INCLUDING LEGS (WxDxH) EXTERIOR FINISH 13.8 A (5 Min. Freeze AT 104 F / WT 80 F) 20 A 20 A 50"x17"x28" (1270x432x711 mm) 52-3/8"x19-1/2"x43" (1330x495x1092 mm) Galvanized steel WEIGHT Net 230 lb. (104 kg) Shipping 273 lb. (124 kg) CONNECTIONS - ELECTRIC Main Power Supply: Permanent Connection SRK to KMS: Wire Harness Connection - REFRIGERANT Liquid line 1-1/16-12 UNF Fitting (#10 Parker) Suction line 1-1/8-12 UNF Fitting (#11 Parker) COMPRESSOR CONDENSER COMPRESSOR PROTECTION FAN MOTOR PROTECTION REFRIGERANT CIRCUIT PROTECTION REFRIGERANT CONTROL Hermetic, Model CS18K6E-TF5 Air-Cooled, Fin and Tube type Auto-Reset Overload Protector (Internal) Thermal Protection Auto-Reset High-Pressure Switch Headmaster (C.P.R.) (160 PSI) REFRIGERANT CHARGE 404A, 16 lb. 5 oz. (7400 g) (Condensing Unit: 15 lb. 14 oz.) (7200 g) (Icemaker: 0 lb. 7.0 oz.) (200 g) DESIGN PRESSURE High 467 PSIG, Low 230 PSIG OPERATING CONDITIONS VOLTAGE RANGE VAC AMBIENT TEMP. (Outdoor use) F ACCESSORIES -SUPPLIED Leg 2 pcs Hex Head Bolt w/washer M8 x pcs Hex Nut M8 16 pcs -REQUIRED Compatible KMS Icemaker Note: We reserve the right to make changes in specifications and design without prior notice. 10

11 C. Condensing Unit Dimensions SRK-14H/3 Note: Legs are included with condenser unit. Leg height is 380 mm (14.96 in.). Unit: mm [in.] 11

12 II. General Information A. Construction 1. Icemaker Harvest Water Valve Spray Tubes Wash Valve Hot Gas Valve Liquid Line Valve Service Valve (High Side) Drier Service Valve (Low Side) Thermistor Control Board Control Box Fill Water Valve Control Switch Service Switch Drain Water Valve Pump Motor Float Switch Bin Control 12

13 2. Condensing Unit Condenser Liquid Line Valve Headmaster (C.P. Regulator) Hot Gas Valve Shut-off Valve (Low Side) Control Box Junction Box Fan Motor and Fan Blade Shut-off Valve (High Side) Receiver Compressor Accumulator Thermostat (Discharge Pipe) 13

14 B. Sequence of Operation 1. Sequence Cycles and Shutdown The steps in the sequence are as outlined below. When power is supplied, the red "POWER OK" LED and the green "BC CLOSED" LED on the CB turn on (If yellow "BC OPEN" LED is on, the unit will not start. In this case clear ice away from BC actuator paddle in the storage bin area). A 5-second delay occurs at startup. Note that the order of the green sequence LEDs from the outer edge of the board is 1, 4, 3, 2. a) 1-Minute Fill Cycle LED 4 is on. WV1 opens and the fill period begins. After 1-minute, CB checks for closed LF/S. If LF/S is closed, the harvest cycle begins. If not, WV1 will remain energized through additional 1-minute cycles until water enters the sump and LF/S closes. This serves as a low water safety to protect the water pump. b) Initial Harvest Cycle LEDs 1, 4 and 2 are on. Comp, FMRs, HGVs, X10 relay, WV2, X12, and X13 relays energize. WV1 de energizes. CB monitors the warming of the evaporator via the thermistor located on the suction line. When the thermistor reaches 48 F (9 C), CB reads a 3.9 kω signal from the thermistor and turns harvest termination over to the adjustable harvest timer (S4 dip switch 1 & 2). The harvest timer has settings of 60, 90, 120, and 180 seconds. The harvest timer is active only during the initial harvest cycle.the pump out timer (S4 dip switch 3 & 4) acts in place of the harvest timer during cycles with a pump-out (S4 dip switch 5 & 6). WV2 and X12 relay are energized during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds, whichever is shorter. 50 seconds before the harvest timer terminates, harvest pump timer starts. LED 4 turns off, WV2 and X12 relay de energize. Harvest Pump Timer: LEDs 1, 3, and 2 are on. Comp, FMRs, HGVs, and X10 relay continue. LED 4 turns off, WV2 and X12 relay de-energize. LED 3 turns on and X11 relay energizes, allowing PM to energize for the last 50 seconds of harvest. CAUTION! S4 dip switch 7 must remain in the factory default position of 7 on. Otherwise, PM will not energize during the last 50 seconds of harvest. The minimum total time allowed by CB for a complete harvest cycle is 2 minutes. At the end of harvest, CB checks position of LF/S and proceeds to the freeze cycle if it is closed or calls for a 1-minute fill if it is open. c) Freeze Cycle LED 1 is on. Comp, FMRs, and PM remain energized. LLVs energize, HGVs, X10, X11, and X13 relays de-energize. For the first 5 minutes, CB will not terminate the freeze cycle. At the end of 5 minutes, F/S assumes control of the freeze cycle. As ice builds on the evaporator, the water level in the tank lowers. LF/S opens and refill starts. LED 4 comes on and WV1 energizes. Refill continues until U/FS closes or 60-second timer terminates, whichever is shorter. 3 seconds after UF/S closes, LED 4 turns off and WV1 de energizes. The KMS 1401MLH refills 1 time. After refill, freeze continues until LF/S opens again, provided the 5-minute minimum freeze timer has terminated. 14

15 d) Pump-Out Cycle LEDs 1, 3, and 2 are on. Comp and FMRs remain energized, HGVs and X10 relay energize. LLVs de energize. PM stops for 2 seconds, then X11 relay energizes, allowing PM and DV to energize for 10 or 20 seconds (S4 dip switch 3 & 4). Water is removed from the bottom of the tank and sent down the drain. At the same time, water flows through the small F/S tube to power flush F/S. When the pump out timer terminates, pump-out is complete. The first pump-out occurs after the 2nd freeze cycle, then every cycle thereafter. The pump-out frequency control is factory set, and generally no adjustment is required. The pump-out frequency control (S4 dip switch 5 & 6) can be set to have a pump-out occur every cycle, or every 2, 5, or 10 cycles. Timing of the first pump-out is dependent on S4 dip switch 5 & 6 settings. See the table below. S4 Dip Switch Setting Pump-Out No. 5 No. 6 Frequency 1st Pump-Out OFF OFF Every cycle After 2nd freeze cycle ON OFF Every 2 cycles After 3rd freeze cycle OFF ON Every 5 cycles After 6th freeze cycle ON ON Every 10 cycles After 11th freeze cycle e) Harvest Cycle LEDs 1, 4 and 2 are on. Same as the initial harvest cycle. See "II.B.1.b) Initial Harvest Cycle." Note: Unit continues to cycle until BC is satisfied or power is turned off. The unit always restarts at the 1-minute fill cycle. f) Shutdown When BC is activated (BC open), the yellow "BC OPEN" LED comes on. The unit then shuts down as outlined in the table below. Cycle at Bin Shutdown Control Activation Fill Cycle 15 seconds after activation. Harvest Cycle At the end of the harvest cycle, or up to 15 seconds into the freeze cycle if activated at the end of the harvest cycle. Freeze Cycle 15 seconds after activation if activated at least 15 seconds before the 5-minute short cycle protection timer terminates. Otherwise, at the end of the next harvest cycle. Legend: CB control board; Comp compressor; DV drain valve; FMRs fan motors remote; F/S float switch; HGVs hot gas valves; LF/S lower float switch contacts; LLVs liquid line valves; PM pump motor; UF/S upper float switch contacts; WV1 fill/re-fill water valve; WV2 harvest water valve 15

16 2. Sequence Flow Chart "G" Control Board Sequence Flow Chart KMS-1401MLH with SRK-14H/3 Cycle Steps Startup begins here after 5-sec. delay 1. 1-Minute Fill Cycle LF/S check WV1 energized LF/S open 2. Harvest Cycle 3. Freeze Cycle WV2 time: 6 min. or the length of harvest minus 50 sec. (S4 dip switch 7), whichever is shorter. Maximum harvest time: 20 min. Thermistor in control LF/S closed Comp energized FMRs energized HGVs energized WV2 energized WV1 de-energized Thermistor temperature reaches 48 F (9 C) (3.9 kω or less) Harvest timer starts. If LF/S is open, Comp stops and cycle returns to 1-min. fill 1 to 3-min. timer in control (S4 dip switch 3 & 4) PM energized WV2 de-energized Harvest Pump Timer 50 sec. LF/S check LF/S open Minimum freeze time: 5 min. Maximum freeze time: freeze timer setting (S4 dip switch 9 & 10) LF/S used to initiate refill (1 refill for KMS 1401MLH) UF/S used to terminate refill (1-min. maximum fill time) 5-min. timer in control LF/S closed Comp continues FMRs continue PM continues LLVs energized WV1 energized/ de-energized refill only HGVs de-energized LF/S in control LF/S opens again or freeze timer terminates Freeze cycle operation turned over to LF/S 4. Pump-Out Cycle Factory set for every cycle. (S4 dip switch 5 & 6) PM stops for 2 sec., then runs for 10/20 sec. Comp continues FMRs continue HGVs energized DV & PM de-energized 2 sec. then energized for 10/20 sec.. LLVs de-energized Shutdown and Restart BC Operation 1. Bin Full Shutdown Delay: Fill Cycle 15 sec. after activation. Harvest Cycle At the end of the harvest cycle, or up to 15 sec. into the freeze cycle if activated at the end of the harvest cycle. Freeze Cycle 15 sec. after activation if activated at least 15 sec. before the 5-min. short cycle protection timer terminates Otherwise, at the end of the next harvest cycle. 2. Icemaker Off All components de-energized. 3. Ice Level Lowered Ice level lowered. No ice pressing against BC actuator paddle. Icemaker starts at "1. 1-Minute Fill Cycle." To 1 above BC open Green "BC CLOSED" LED off Yellow "BC OPEN" LED on Yellow "BC OPEN" LED continues All components de energized BC closed Green "BC CLOSED" LED on Yellow "BC OPEN" LED off Legend: Comp-compressor WV1-fill/refill water valve DV-drain valve WV2-harvest water valve FMRs-fan motors-remote HGVs-hot gas valves (KMS and SRK) LF/S-lower float switch LLVs-liquid line valves (KMS and SRK) PM-pump motor UF/S-upper float switch Components Energized when the Control Switch is in the "SERVICE" Position When in the "SERVICE" position, the control switch supplies power to the service switch and the icemaker is in service mode. The service switch has three positions: "DRAIN," "CIRC." and "WASH." See the information below for details of each function. DRAIN Power is supplied to the pump and drain valve. This drains the water tank. CIRC. Power is supplied to the pump only. This operation can be used to circulate cleaner and sanitizer over the outside surface of the evaporator for extended periods of time. WASH Power is supplied to the pump and wash valve. This operation is used to circulate cleaner and sanitizer over both the inside and outside surfaces of the evaporator. 16

17 C. Control Board A Hoshizaki exclusive control board is employed in the KMS-1401MLH Modular Crescent Cuber. All models are pretested and factory-adjusted. For a control board check procedure, see "IV.B. Control Board Check." CAUTION 1. Fragile, handle very carefully. 2. A 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 unit when handling or replacing the board. 3. Do not touch the electronic devices on the board or the back of the board to prevent damage to the board. 4. Do not change wiring and connections. Do not misconnect K3, K4 and K5, because the same connector is used for the thermistor, bin control, and float switch. 5. Always replace the whole board assembly if it goes bad. 6. Do not short out power supply to test for voltage. 17

18 1. Control Board Layout "G" Control Board Bin Control Switch Closed LED (green) "ALARM RESET" Button S4 Dip Switch "OUTPUT TEST" Button (used to test relays on control board) Bin Control Switch Open LED (yellow) Part Number Alarm Buzzer Power LED (red) (lights when 10.5V is supplied to K2 connector) Relay LEDs (4) (indicate which relays are energized and which K1 connector pins are energized LED 2 (X2 Relay) LED 2 ON: K1 Connector Pin #2 LED 2 OFF: K1 Connector Pin #3 LED 3 (X3 Relay) LED 3 on: K1 Connector Pin #5 (energized during harvest pump timer) LED 3 off: K1 Connector Pin #4 (energized in freeze) LED 4 (X4 Relay) K1 Connector Pin #6 LED 1 (X1 Relay) K1 Connector Pin #1, #9 K2 Connector Control Transformer (10.5VAC) "G" Control Board Part Number 2A WHITE K3 Connector Harvest Control (thermistor) RED K4 Connector Bin Control S5 Dip Switch (factory set for 1 refilldo not adjust) BLACK K5 Connector Float Switch Label (control board revision level indicated on label on side of relay) K1 Ten-Pin Connector Pins #1 through #10 #1, 9-LED 1: Magnetic Contactor, X13 Relay (holding circuit during Harvest Pump Timer), and Drain Valve (DV) (during Pump-Out) #2-LED 2 on: Hot Gas Valves (HGVs) (KMS and SRK) and X10 Relay #3-LED 2 off: Liquid Line Valves (LLVs) #4-LED 3 off: Pump Motor (PM) (freeze) #5-LED 3 on: X11 Relay (Pump Motor (PM) in Harvest Pump Timer and Drain Valve (DV) in Pump-Out) #6-LED 4: Fill/Refill Water Valve (W1V) (Fill and Refill only) and Harvest Water Valve (WV2) and X12 Relay (Harvest only) #7, 10 Supply Voltage #8 Open

19 2. LED Lights and Audible Alarm Safeties At startup, a 5-second delay occurs while the control board conducts an internal timer check. A beep occurs when the control switch is moved to the "ICE" position. The red LED indicates proper control voltage and remains on unless a control voltage problem occurs. The green LEDs 1 through 4 energize and sequence from initial startup as listed in the table below. Note that the order of the LEDs from the outer edge of the control board is 1, 4, 3, 2. For details, see "II.B. Sequence of Operation." Sequence Step LED Energized Time LEDs are On Components Min. Max. Avg. 1-Minute Fill Cycle 4 WV1 1 minute Harvest Cycle 1, 4, 2 Comp, FMRs 2 minutes 20 minutes 3 to 5 minutes WV2, HGVs Harvest Pump Timer 1, 3, 2 Comp, FMRs, PM, HGVs 0 seconds 50 seconds harvest pump timer setting Freeze Cycle 1 (and 4 at refill) Comp, FMRs, PM, LLVs (WV1 at refill) 5 minutes freeze timer setting Pump-Out Cycle 1, 3, 2 Comp, FMRs, PM, HGVs, DV 10 seconds 20 seconds The built in safeties shut down the unit and have alarms as listed below. No. of Beeps Type of Alarm (every 3 sec.) 1 High Evaporator Temp. (temperature > 127 F) (53 C) 2 Harvest Backup Timer (harvest > 20 min. for two cycles in a row) 3 Freeze Timer (freeze > specified setting for two cycles in a row) Timer is factory set using S4 dip switch 9 & 10 Notes 30 to 35 minutes Check for harvest problem (stuck HGVs or relay), hot water entering unit, stuck HM, or shorted thermistor. Check for open thermistor, HGVs not opening, TXVs or LLVs leaking by, low charge, or inefficient Comp. Check for a F/S stuck closed (up), WV1 or WV2 leaking by, HGVs leaking by, PM not pumping, TXVs not feeding properly, LLVs not opening, low charge, HM not bypassing, or inefficient compressor. To reset the above safeties, press the "ALARM RESET" button with the power supply on. 6 Low Voltage (92Vac ±5% or less) Red LED will turn off if voltage protection operates. The control voltage safeties automatically reset when voltage is corrected. 7 High Voltage (147Vac ±5% or more) Legend: Comp compressor; DV drain valve; FMRs fan motors-remote; F/S float switch; HGVs hot gas valves; HM headmaster (C.P.R.); LLVs liquid line valves; PM pump motor; TXVs thermostatic expansion valves; WV1 fill/refill water valve; WV2 harvest 19

20 3. Controls and Adjustments CAUTION Dip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty coverage. For more information, contact Hoshizaki Technical Support at a) Default Dip Switch Settings The dip switches are factory-adjusted to the following positions: S4 Dip Switch Dip Switch No KMS-1401MLH OFF OFF OFF ON OFF OFF ON OFF OFF ON S5 Dip Switch (Do Not Adjust) Dip Switch No KMS-1401MLH OFF ON OFF OFF OFF S4 Dip Switch Freeze Timer (9 & 10) Factory Use (8) Harvest Pump Timer (7) (Do not adjust) Pump-Out Frequency Control (5 & 6) Pump-Out Timer (3 & 4) Harvest Timer (1 & 2) b) Harvest Timer (S4 dip switch 1 & 2) Initial Harvest Cycle: The harvest timer starts counting when the thermistor reads 48 F (9 C) at the evaporator outlet and the control board reads the thermistor's 3.9 kω signal. The harvest timer is factory set, and generally no adjustment is required. Normal Harvest Cycle: This unit has a pump-out every cycle. The pump out timer (S4 dip switch 3 & 4) acts in place of the harvest timer during cycles with a pump-out. For details, see "II.C.3.c) Pump-Out Timer (S4 dip switch 3 & 4)." Dip Switch Setting Time (seconds) No. 1 No. 2 OFF OFF 60 ON OFF 90 OFF ON 120 ON ON

21 c) Pump-Out Timer (S4 dip switch 3 & 4) The 1st pump-out occurs after the 2nd freeze cycle and every cycle thereafter. When a pump-out is called for, the X10 relay is energized and the X13 relay is de-energized to allow the drain valve to energize. The pump motor stops for 2 seconds, then the X11 relay energizes, allowing the pump motor and drain valve to enegize. Water is removed from the bottom of the tank and sent down the drain. At the same time, water flows through the small float switch tube to power flush the float switch. The pump out drains the water tank for the time determined by the pump out timer. The pump out timer also acts in place of the harvest timer during cycles with a pump-out. The pump-out timer is factory set, do not adjust. S4 Dip Switch Setting Time (seconds) Inlet Water Valve No. 3 No. 4 T1 T2 OFF OFF closed ON OFF closed OFF ON open if refill = 0; closed if refill 1 or greater ON ON closed T1: Time to drain the water tank T2: Harvest timer at pump-out d) Pump-Out Frequency Control (S4 dip switch 5 & 6) The pump-out frequency control is factory-adjusted to drain the water tank every cycle. The first pump-out occurs after the 2nd freeze cycle, then every cycle thereafter. The pump-out frequency control is factory set, and generally no adjustment is required. The pump-out frequency control (S4 dip switch 5 & 6) can be set to have a pump-out occur every cycle, or every 2, 5, or 10 cycles. Timing of the first pump-out is dependent on S4 dip switch 5 & 6 settings. See the table below. S4 Dip Switch Setting Pump-Out No. 5 No. 6 Frequency 1st Pump-Out OFF OFF Every cycle After 2nd freeze cycle ON OFF Every 2 cycles After 3rd freeze cycle OFF ON Every 5 cycles After 6th freeze cycle ON ON Every 10 cycles After 11th freeze cycle 21

22 e) Harvest Pump Timer (S4 dip switch 7) CAUTION Factory set for proper operation. Do not adjust. Adjustment outside of the factory default setting may result in damage to the icemaker. Depending on the harvest pump timer setting, the pump motor energizes and runs the last 0 or 50 seconds of harvest. When the pump motor is on, water circulates over the evaporator. The water valve is open during harvest for a maximum of 6 minutes or the length of harvest minus 0 or 50 seconds (determined by the harvest pump timer setting), whichever is shorter. When S4 dip switch 7 is in the on position and harvest begins, X10 relay energizes and allows WV2 (harvest water valve), X12, and X13 relays to energize. A lockout circuit is created using the X10, X12, and X13 relays. This prevents the drain valve from energizing during harvest pump timer. See "III.B. Wiring Diagram." 50 seconds before harvest termination, LED 4 goes off de energizing WV2 (havest water valve) and X12 relay. X13 relay remains energized through the holding circuit allowed through X10 and X13 relays. Next, LED 3 on the control board turns on and X11 relay energizes, allowing the pump motor to energize. The pump motor runs the last 50 seconds of harvest. S4 Dip Switch Setting Pump Motor No. 7 Time (seconds) ON 50 OFF 0 f) Factory Use (S4 dip switch 8) Factory set for proper operation. Do not adjust. This must be left in the factory default position. g) Freeze Timer (S4 dip switch 9 & 10) CAUTION Adjust to proper specification, or the unit may not operate correctly. The freeze timer setting determines the maximum allowed freeze time to prevent possible freeze-up issues. Upon termination of freeze timer, the control board initiates the harvest cycle. After 2 consecutive freeze timer terminations, the control board shuts down the icemaker. In this case, see "IV.F.3. Low Ice Production" for possible solutions. The freeze timer is factory set, and generally no adjustment is required. Before changing this setting, contact your local Hoshizaki distributor or Hoshizaki Technical Support for recommendations. Dip Switch Setting Time No. 9 No. 10 (minutes) OFF OFF 60 OFF ON 50 ON OFF 70 ON ON 60 22

23 h) Float Switch Control (S5 dip switch 1) CAUTION Do not adjust. This must be left in the factory default position or the unit will not operate correctly. Factory set. S5 dip switch 1 allows for single or double float switch applications. The KMS-1401MLH uses a double float switch. S5 Dip Switch Setting No. 1 OFF ON Single or Double Float Switch Application Single Double i) Refill Counter (S5 dip switch 2 through 5) CAUTION Do not adjust. These must be left in the factory default position or the unit will not operate correctly. Factory set. S5 dip switch 2 through 5 allows for refills during the freeze cycle. The KMS-1401MLH is factory set for 1 refill. Do not adjust. S5 2-5 Dip Switch Settings No. of Refills No. 2 No. 3 No.4 No. 5 ON OFF OFF OFF 1 Refill Note: When refill set > 0, water valve is off during pump-out even if S4 dip switch 3 & 4 are set to 3 off and 4 on. See "II.C.3.c) Pump-out Timer (S4 dip switch 3 & 4)." 23

24 D. Control and Service Switches 2 control switches are used to control the operation of this unit. These switches are referred to as control switch and service switch. They are located on the control box. 1. Control Switch The control switch has three positions: "OFF" for power off; "ICE" for icemaking, and "SERVICE" to activate the service switch. 2. Service Switch When the control switch is in the "SERVICE" position, the control switch supplies power to the service switch. The service switch has three positions: "DRAIN," "CIRC." and "WASH." Note: 1. When the service switch is active (control switch in the "SERVICE" position), power is supplied to the water pump in all three positions. 2. When the control switch is in the "OFF" or "ICE" position, the service switch is de activated. In this state, it can be left in any position. a) DRAIN This unit utilizes a pump-out drain system. When the control switch is in the "SERVICE" position and the service switch is placed in the "DRAIN" position, power is supplied to the water pump and drain valve. b) CIRC. When the service switch is active and placed in the "CIRC." position, power is supplied to the water pump only. This water pump operation is used during cleaning to circulate cleaner for extended periods of time over the outside surface of the evaporator. c) WASH This unit utilizes a solenoid operated wash (bypass) valve. When the service switch is active and placed in the "WASH" position, power is supplied to the pump and wash valve. This operation is used to circulate cleaner and sanitizer over both the inside and outside of the evaporator. 24

25 III. Technical Information A. Water Circuit and Refrigeration Circuit KMS-1401MLH Spray Tube Harvest Water Valve Evaporator Fill/Refill Water Valve Water Tank Pump Motor Water Supply Wash Valve Float Switch Drain Drain Water Valve SRK-14H/3 Line Valve Drier Service Valve Strainer Line Valve Fan Shutoff Valve OS Quick Thermistor Suction Line Strainer Hot Gas Valve Discharge Line Check Valve Expansion Valve Accumulator Compressor Receiver Condenser Headmaster (C.P. Regulator) Check Valve Access Valve Hot Gas Valve Strainer Fusible Plug High-Pressure Switch Thermostat 25

26 B. Wiring Diagrams 1. KMS-1401MLH with SRK-14H * High-Pressure Switch Cut-out 426± 22 PSIG Cut-in 341±22 PSIG Control Transformer Output 10.5V at 115V ** 0 ** Thermostat Switch Cut-out 266 F±9 F (130 C± 5 C) Cut-in 239 F±9 F (115 C±5 C) * 26

27 2. KMS-1401MLH with SRK-14H3 ** * High-Pressure Switch Cut-out 426± 22 PSIG Cut-in 341±22 PSIG 0 Control Transformer Output 10.5V at 115V ** Thermostat Switch Cut-out 266 F±9 F (130 C± 5 C) Cut-in 239 F±9 F (115 C±5 C) * 27

28 3. Wire Harness Connections Wire Harness Connections SRK Condensing Unit KMS Icemaker Unit (factory connected) BR V P BK W GR GR BR V P BK W BR V P BK W GR BR V P BK W Fuse 10A HGV LLV Fuse 10A HGV LLV Contactor Neutral GND GND CB Neutral Wire Color Code: BK-black BR-brown GR-green P-pink V-violet W-white Legend: GND-ground HGV-hot gas valve CB-control board LLV-liquid line valve L2-single phase power supply L3-three phase power supply 28

29 C. Performance Data 1. KMS-1401MLH with SRK-14H APPROXIMATE ICE AMBIENT TEMP. WATER TEMP. (ºF/ºC) PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/ / / lbs./day kg./day 100/ APPROXIMATE ELECTRIC CONSUMPTION 70/21 80/27 90/ watts 100/ APPROXIMATE WATER 70/ CONSUMPTION PER 24 HR. 80/ / gal./day m 3 /day 100/ FREEZING CYCLE TIME 70/21 80/27 90/ min. HARVEST CYCLE TIME 100/38 70/21 80/27 90/ min. 100/ HEAD PRESSURE 70/ / / PSIG kg/cm 2 G 100/ SUCTION PRESSURE 70/ / / PSIG kg/cm 2 G 100/ TOTAL HEAT OF REJECTION FROM CONDENSER (SRK-14H) TOTAL HEAT OF REJECTION FROM COMPRESSOR (SRK-14H) CONDENSER VOLUME (SRK-14H) 27,900 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] 3,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] 226 CU. IN Note: 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only. 2. We reserve the right to make changes in specifications and design without prior notice. 29

30 2. KMS-1401MLH with SRK-14H3 APPROXIMATE ICE AMBIENT TEMP. WATER TEMP. (ºF/ºC) PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/ / / lbs./day kg./day 100/ APPROXIMATE ELECTRIC CONSUMPTION 70/21 80/27 90/ watts 100/ APPROXIMATE WATER 70/ CONSUMPTION PER 24 HR. 80/ / gal./day m 3 /day 100/ FREEZING CYCLE TIME 70/21 80/27 90/ min. HARVEST CYCLE TIME 100/38 70/21 80/27 90/ min. 100/ HEAD PRESSURE 70/ / / PSIG kg/cm 2 G 100/ SUCTION PRESSURE 70/ / / PSIG kg/cm 2 G 100/ TOTAL HEAT OF REJECTION FROM CONDENSER (SRK-14H3) TOTAL HEAT OF REJECTION FROM COMPRESSOR (SRK-14H3) CONDENSER VOLUME (SRK-14H3) 28,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] 3,200 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] 226 CU. IN Note: 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only. 2. We reserve the right to make changes in specifications and design without prior notice. 30

31 IV. Service Diagnosis WARNING 1. This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. 2. Risk of electric shock. Use extreme caution and exercise safe electrical practices. 3. Moving parts (e.g., fan blade) can crush and cut. Keep hands clear. 4. CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after the unit is serviced. Make sure that none have fallen into the dispenser unit/storage bin. 5. Make sure all food zones in the icemaker and dispenser unit/storage bin are clean after the unit is serviced. For cleaning procedures, see "VI. Cleaning and Maintenance." A. Diagnostic Procedure The diagnostic procedure is basically a sequence check which can be used at unit startup or for system diagnosis. This procedure allows you to diagnose electrical system and component failures. Before conducting the diagnostic procedure, check for correct installation, proper voltage per unit nameplate, and adequate water supply. Check CB using the steps in "IV.B. Control Board Check." Check the dip switch settings to assure that S4 dip switch 3, 4, 7, 8, 9, & 10 and S5 dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, & 6 are cleaning adjustments and the settings are flexible. For factory default settings, see "II.C.3.a) Default Dip Switch Settings." As you go through the procedure, check to assure the components energize and de-energize correctly. If not, those components and controls are suspect. 1) Turn off the power supply, then access the control box. Clear any ice from BC. 2) Turn on the power supply, then move the control switch to the "ICE" position. A 5 second delay occurs. The red "POWER OK" LED and the green "BC CLOSED" LED on CB come on. If the yellow "BC OPEN" LED is on, check BC. See "IV.C. Bin Control Check." 3) 1-Minute Fill Cycle LED 4 is on. WV1 energizes. After 1 minute, CB checks for a closed LF/S. If LF/S is closed, the harvest cycle begins. If closed, continue to step 4. If LF/S is open, WV1 remains energized through additional 1-minute fill cycles until water enters the reservoir and LF/S closes (low water safety protection during initial start up and at the end of each harvest). Diagnosis: Confirm that water enters the water tank. If not, check that the water supply shut-off valve is open and screens or external filters are clear. Check supply voltage at WV1 solenoid. If no voltage is present, see "IV.B. Control Board Check." If voltage is present, check solenoid continuity. If the water tank fills, but the unit fails to start harvest, check for open LF/S. See "IV.D. 1. Float Switch Check." Check termination of 1 minute timer in CB. See "IV.B. Control Board Check." 31

32 4) Initial Harvest Cycle LEDs 1, 4, and 2 are on. Comp, FMRs, HGVs, X10 relay, WV2, X12, and X13 relays energize. WV1 de-energizes. CB monitors the warming of the evaporator via the thermistor located on the suction line. When the thermistor reaches 48 F (9 C), CB reads a 3.9 kω signal from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2). The harvest timer has settings of 60, 90, 120, and 180 seconds. The harvest timer is active only during the initial harvest cycle. The pump out timer (S4 dip switch 3 & 4) acts in place of the harvest timer during cycles with a pump-out (S4 dip switch 5 & 6). WV2 and X12 relay are energized during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds, whichever is shorter. 50 seconds before the harvest timer terminates, harvest pump timer starts. LED 4 turns off, WV2 and X12 relay de energize. Harvest Pump Timer LEDs 1, 3, and 2 are on. Comp, FMRs, HGVs, and X10 relay continue. LED 4 turns off, WV2 and X12 relay de energize (CB K1 connector pin #6 (orange (O) wire)). LED 3 turns on and X11 relay energizes (CB K1 connector pin #5 (dark blue (DBu) wire)), allowing PM to energize for the last 50 seconds of harvest (S4 dip switch 7 setting). CAUTION! S4 dip switch 7 must remain in the factory default position of 7 on. Otherwise, PM will not energize during the last 50 seconds of harvest. The minimum total time allowed by CB for a complete harvest cycle is 2 minutes. At the end of harvest, CB checks the position of LF/S and proceeds to the next cycle if it is closed, or calls for a 1-minute fill cycle if it is open. Diagnosis: Check that evaporator is warming and Comp, FMRs, and HGVs remain energized. WV2 is energized during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds (Harvest Pump Timer (S4 dip switch 7)), whichever is shorter. Average initial harvest cycle at factory setting is 2 to 3 minutes. 1.5 minutes after initial harvest begins, touch Comp discharge line. Is it hot? If not, check that Comp is energized, refrigerant pressures are in range, HGVs are energized and open, LLVs are de energized and closed. If discharge line is hot, place a thermometer on the suction line next to the thermistor. Has it warmed to 48 F (9 C) or warmer? Confirm thermistor status. See "IV.E. Thermistor Check." If temperature has been reached, check that WV2 de-energizes (LED 4 off) and X11 relay energizes (LED 3 on), allowing PM to energize and circulate water over the evaporator for the last 50 seconds of harvest. If not, make sure CB S4 dip switch 7 is in the factory default position. Check CB K1 connector pin #5 (DBu wire) and X11 relay for 115VAC. If 1-minute fill cycle starts after harvest, see "IV.D. Float Switch Check and Cleaning." If the thermistor reading is in proper range and CB fails to terminate the harvest cycle and initiate the freeze cycle, CB is bad and must be replaced. 5) Freeze Cycle LED 1 is on. Comp, FMRs, and PM remain energized (CB K1 connector pin #5 de-energizes and K1 connector pin #4 energizes to prevent PM interuption). LLVs energize. HGVs, X10, X11, and X13 relays de-energize. Freeze begins and the water level in the water tank lowers as ice forms. LF/S 1st Activation: Refill LEDs 1 and 4 are on. Comp, FMRs, LLVs, and PM remain energized. Refill can occur at any time during the freeze cycle (1 refill per cycle). Water level lowers enough for LF/S to open. LED 4 comes on and CB energizes WV1 through X10 relay. LED 4 and WV1 remain energized until UF/S closes or the 1-minute fill timer terminates, whichever comes first. 32

33 LF/S 2nd Activation: Freeze Termination LED 1 is on. The unit is held in freeze by a 5-minute short cycle protection timer. When LF/S opens a second time, the freeze cycle terminates. Freeze can only be terminated on the second activation of LF/S and after 5 minutes of freeze. Diagnosis: Minimum freeze time is 5 minutes. During the first 5 minutes of freeze, confirm that Comp, FMRs, PM, and LLVs are energized and that HGVs, WV2, and WV1 (except during refill) are de-energized and not bypassing. The evaporator temperature should be dropping. Make sure TXVs and HM are operating properly. Check that DV is not leaking by (water flowing down the potable drain). Check for proper unit pressures (see "III.C. Performance Data") or an inoperative Comp. Disconnect the black K5 float switch connector from CB. 15 seconds after disconnecting the black K5 F/S connector, LED 4 comes on, WV1 energizes and refill begins. Connect the black K5 F/S connector back on CB. When refill is finished, LED 4 turns off and WV1 de-energizes. Disconnect the black K5 F/S connector again. When 5 or more minutes have elapsed in the freeze cycle, the unit should switch out of the freeze cycle. After the unit switches out of freeze, reconnect the black K5 F/S connector to CB. If the unit remains in freeze with F/S disconnected, replace CB. To check F/S, see "IV.D. Float Switch Check and Cleaning." Note: Normal freeze cycle will last 30 to 35 minutes depending on model and conditions. Cycle times and pressures should follow performance data provided in this manual. See "III.C. Performance Data." 6) Pump-Out Cycle LEDs 1, 3, and 2 are on (10/20 second pump-out) The 1st pump-out occurs after the 2nd freeze cycle and every cycle thereafter. Comp and FMRs remain energized. HGVs and X10 relay energize. LLVs de-energize. PM de energizes for 2 seconds, then X11 relay energizes, allowing PM and DV to energize for 10 seconds. PM energized through X11 relay (energized) terminal #4 brown (BR) and terminal #6 red (R), then through control switch terminal #6 red (R) and terminal #5 red (R). DV energized through X10 relay (energized) terminal #5 violet (V) and terminal #3 yellow (Y), then through X13 relay (de-energized) terminal #6 yellow (Y) and terminal #2 light blue (LBu), then through X11 relay (energized) terminal #3 light blue (LBu) and terminal #5 gray (GY). This pump-out removes contaminants from the water tank through DV and allows for a power flush of F/S. Diagnosis: PM Operation: If PM does not come on, check CB K1 ten pin connector pin #5 dark blue (DBu) wire (X11 relay coil voltage) to a white neutral for 115VAC. If LED 3 is on and 115VAC is not present, CB is bad and should be replaced. If 115VAC is present, X11 relay should energize and X11 terminals #4 brown (BR) and #6 red (R) should be closed. Check X11 relay terminal #6 red (R) for 115VAC to a white neutral. If 115VAC is not present, check X11 relay coil and contact continuity. If 115VAC is present and PM is still not energized, check control switch conitinuity between terminal #5 red (R) wire and #6 red (R) wire. If closed, check PM windings and capacitor. DV Operation: If water does not pump out, check CB K1 ten pin connector pin #1 violet (V) wire (power supply for DV operation) and CB K1 ten-pin connector pin #2 pink (P) wire (X10 relay coil voltage for DV operation) to a white neutral for 115VAC. If 115VAC is not present on either circuit CB is bad and should be replaced. If 115VAC is present, X10 relay terminals #1 yellow (Y) and #5 violet (V) should be closed. Check X10 relay terminal #3 yellow (Y) to a white neutral for 115VAC. If 115VAC is not present on terminal #3 yellow (Y), check X10 relay coil and contact continuity. If 115VAC is present on X10 relay terminal #3 yellow 33