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17

f) LED Lights and Audible Alarm Safeties

The red LED indicates control voltage (10 to 1V at K) and will remain on unless a
control voltage problem occurs. At startup a 5 second delay occurs while the board
conducts an internal timer check. A beep occurs when the control switch is moved to the
"ICE" position.
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 board is 1, 4, 3, .
For more information, see "II.B. Sequence of Operation."

Sequence Step

LED

Energized

Components

Time LEDs are On

Min.

Max.

Avg.

1 Minute Fill Cycle 4

FWV

60 seconds

Harvest Cycle

1, 4 and

HWV, HGV,
Comp,FMR

minutes

0 minutes 3 to 5 minutes

Last 50 seconds of harvest, HWV de-energizes and PM energizes
(LEDs 1, 3 and are on)
Freeze Cycle

1 (and 4 at
refills)

Comp, PM,
FMR, LLV
(FWV at
refill)

5 minutes

freeze timer
setting

30 to 35 minutes

Pump-Out

1, 3 and

Comp, HGV,
PM, DWV,
FMR

10 seconds 0 seconds factory setting

The built in safeties shut down the unit and have alarms as listed below.

No. of Beeps

(every 3 sec.)

Type of Alarm

Notes

1

High Evaporator Temp.
(temperature > 17°F)
(53°C)

Check for harvest problem (stuck HGV or
relay), hot water entering unit, stuck HM or
shorted thermistor.

Harvest Backup Timer
(harvest > 0 min. for two
cycles in a row)

Check for open thermistor, HGV not opening,
TXV leaking by, low charge or inefficient Comp.

3

Freeze Timer
(freeze > specified setting
for two cycles in a row)
Timer is factory set using
S4 dip switch 9 & 10

Check for a float switch stuck closed (up), HWV
or FWV leaking by, HGV leaking by, TXV not
feeding properly, 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
(9Vac ±5% or less)

Red LED will turn off if voltage protection oper-
ates.
The control voltage safeties automatically reset
when voltage is corrected.

7

High Voltage
(147Vac ±5% or more)

Legend:

Comp–compressor; DWV–drain water valve; FMR–remote fan motor; FWV–fill

water valve;

HGV–hot gas valve; HM–headmaster; HWV–harvest water valve;

LLV–liquid line valve; PM–pump motor; TXV–thermostatic expansion valve

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Содержание SRK-13H

Страница 1: ...Superior Degree of Reliability www hoshizaki com Model KMS 1230MLH Including Condensing Unit Model SRK 13H 3 Modular Crescent Cuber Serenity Series Hoshizaki America Inc Number 73130 Issued 2 21 2007 SERVICE MANUAL ...

Страница 2: ...aintenance and service of the icemaker Should the reader have any questions or concerns which have not been satisfactorily addressed please call write or send an e mail message to the HOSHIZAKI Technical Support Department for assistance HOSHIZAKI AMERICA INC 618 Highway 74 South Peachtree City GA 30269 Attn HOSHIZAKI Technical Support Department Phone 1 800 233 1940 Technical Service 770 487 2331...

Страница 3: ...ntrols and Adjustments 18 a Default Dip Switch Settings 18 b Harvest Timer S4 dip switch 1 2 18 c Pump Out Timer S4 dip switch 3 4 19 d Pump Out Frequency Control S4 dip switch 5 6 19 e S4 Dip Switch 7 8 19 f Freeze Timer S4 dip switch 9 10 20 g Float Switch Control and Refill Counter S5 dip switch 1 through 5 20 4 Control Board Check Procedure 20 5 Control Board Replacement 21 D Harvest Control T...

Страница 4: ...nd Recharge R 404A 40 B Condensing Unit 41 1 Removal and Replacement of Compressor 41 2 Removal and Replacement of Condenser 42 3 Removal and Replacement of Hot Gas Valve and Liquid Line Valve 42 4 Removal and Replacement of Headmaster Condensing Pressure Regulator C P Regulator 43 5 Removal and Replacement of Fan Motor 44 C Icemaker 44 1 Removal and Replacement of Evaporator 44 2 Removal and Repl...

Страница 5: ...rmanent Connection WATER SUPPLY Inlet 1 2 FPT DRAIN Outlet 3 4 FPT CONDENSATE DRAIN 5 8 OD Pipe 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 Fin and Tube...

Страница 6: ... 2 KMS 1230MLH SRK 13H3 Intentionally Left Blank Note We reserve the right to make changes in specifications and design without prior notice ...

Страница 7: ...line 1 1 16 12 UNF Fitting 10 Parker COMPRESSOR Hermetic Model CS18K6E PFV CONDENSER Air cooled Fin and Tube type COMPRESSOR PROTECTION Auto reset Overload Protector Internal FAN MOTOR PROTECTION Thermal Protection REFRIGERANT CIRCUIT PROTECTION Auto reset High Pressure Control Switch REFRIGERANT CONTROL Condensing Pressure Regulator REFRIGERANT CHARGE 15 lbs 14 oz 7200 g DESIGN PRESSURE High 467 ...

Страница 8: ... 2 SRK 13H3 Intentionally Left Blank ...

Страница 9: ...s Hot Gas Valve Liquid Line Valve Service Valve High Side Drier Wash Valve Service Valve Low Side Fill Water Valve Control Board Pump Motor Float Switch Drain Water Valve Control Switch Bin Control Switch Service Switch Harvest Water Valve Thermistor Control Box ...

Страница 10: ...denser Headmaster C P Regulator Hot Gas Valve Liquid Line Valve Junction Box Receiver Tank Accumulator Shut off Valve Low Side Thermostat Discharge Pipe Compressor Shut off Valve High Side Fan Motor and Fan Blade Access Valve ...

Страница 11: ...cycle is 2 minutes HWV is open during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds whichever is shorter LED 4 goes off when HWV closes PM energizes and runs for the last 50 seconds of harvest LED 3 comes on when PM energizes At the end of harvest the control board checks the position of LF S and proceeds to the freeze cycle if it is closed or calls for a 1 minute fi...

Страница 12: ...trol board checks the 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 The unit continues to cycle through freeze and harvest cycles until the bin control activates opens and shuts the unit down Note To prevent incomplete batches of ice from forming on the evaporator the control board will only shut down the machine within the first 5 min...

Страница 13: ... sec and then runs for 10 sec Cycle Steps FWV energized LF S open LF S closed Comp energized FMR energized HGV energized HWV energized FWV de energized DWV de energized Thermistor temp reaches 48 F 9 C 3 9 kΩ or less Harvest timer starts LF S open Comp continues FMR continues PM continues LLV energizes FWV energized de energized for refill only HGV de energized LF S closed Freeze cycle operation t...

Страница 14: ...tic 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 mechanical bin control and float switch 5 Always replac...

Страница 15: ...lay 3 Liquid Line Valves LLV 4 Pump Motor icemaking 5 Pump Motor harvest 6 Fill Water Valve FWV 7 10 Supply Voltage 8 Open Switch for C board and ALPINE board service boards only Bin Control Switch Open LED yellow S4 Dip Switch Bin Control Switch Closed LED green Alarm Buzzer Power LED red lights when power is supplied to the board LED 2 green Hot Gas Valves HGV LED 3 green Pump Motor PM PM on but...

Страница 16: ...ll signal this problem using 1 beep every 3 seconds The alarm reset button on the control board must be pressed with power on to reset the safety d Low Water Safety The control board checks the position of the lower float switch at the end of the initial one minute water fill cycle and at the end of each harvest cycle If the lower float switch is closed the control board proceeds to the next cycle...

Страница 17: ...ory setting The built in safeties shut down the unit and have alarms as listed below No of Beeps every 3 sec Type of Alarm Notes 1 High Evaporator Temp temperature 127 F 53 C Check for harvest problem stuck HGV or relay hot water entering unit stuck HM or shorted thermistor 2 Harvest Backup Timer harvest 20 min for two cycles in a row Check for open thermistor HGV not opening TXV leaking by low ch...

Страница 18: ...stor reads 48 F 9 C at the evaporator outlet No adjustment is required under normal use as the harvest timer is adjusted to the suitable position Before changing this setting call the HOSHIZAKI Technical Support Department at 1 800 233 1940 for recommendations Keep in mind that setting the harvest timer to a longer setting will decrease 24 hour production Dip Switch Setting Time seconds No 1 No 2 ...

Страница 19: ...mp out frequency control setting dip switch 5 6 pump out occurs every cycle or every 2nd 5th or 10th cycle d Pump Out Frequency Control S4 dip switch 5 6 The pump motor drains the water tank at the frequency set by the pump out frequency control The pump out frequency control is factory adjusted to drain the water tank every 10 cycles and no adjustment is required However where water quality is ba...

Страница 20: ...lp you verify your diagnosis 1 Check the S4 and S5 dip switch settings to assure that they are in the factory default positions 2 Turn the control switch to ICE and check for proper control voltage If the red LED is on the control voltage is good If the red LED is off check the control transformer circuit 3 Check the 115 volt input at the wire harness terminals and the 10 pin connector Check the b...

Страница 21: ...or The resistance varies depending on the suction line temperatures The thermistor detects the temperature of the evaporator outlet to start the harvest timer No adjustment is required If necessary check for resistance between thermistor leads and visually check the thermistor mounting located on the suction line next to the evaporator outlet Temperature F Temperature C Resistance kΩ 0 18 14 401 1...

Страница 22: ... See VI Cleaning and Maintenance Instructions 3 Float Switch Check Procedure Before replacing a float switch that you suspect is bad make sure the float switch has been cleaned This procedure will help you verify your diagnosis The float switch has three wires The black wire is common The blue wire is for the lower float switch contact and the red wire is for the upper float switch contact 1 Disco...

Страница 23: ...23 Fig 1 Float Switch Red Upper Switch Black Common Blue Lower Switch Upper Switch Lower Switch Float Retainer Clip Housing Mechanical Lock ...

Страница 24: ... will allow the machine to complete the freeze cycle and the following harvest cycle before shutting down the machine 2 Bin Control Check Procedure 1 Clear any ice away from the bin control 2 Turn the control switch to ICE 3 Check that the green BC CLOSED LED on the control board is on 4 Activate the bin control actuator press the actuator in Check that the yellow BC OPEN LED on the control board ...

Страница 25: ...is supplied to the water pump in all three positions 2 When the control switch is in the OFF position or in the ICE position the service switch has no power and can be left in any position a DRAIN The KMS series utilizes a pump out drain system When the service switch is active and placed in the DRAIN position power is supplied to the pump and drain valve b CIRC When the service switch is active a...

Страница 26: ... Check Valve Access Valve Hot Gas Valve Strainer Fusible Plug High Pressure Switch Thermostat Discharge Line Compressor Receiver Tank Accumulator Suction Line Hot Gas Valve Strainer OS Quick Check Valve Expansion Valve Float Switch Drain Water Valve Drain Pump Motor Water Tank Fill Water Valve Evaporator Thermistor III Technical Information A Water Circuit and Refrigeration Circuit ...

Страница 27: ...27 V B Wiring Diagrams 1 KMS 1230MLH SRK 13H Pressure Switch Cut out 412 21 PSIG Cut in 327 21 PSIG 0 Thermostat Switch Cut out 266 F 9 F Cut in 239 F 9 F ...

Страница 28: ...28 2 KMS 1230MLH SRK 13H3 Intentionally Left Blank ...

Страница 29: ... PSIG kg cm 2 G 100 38 40 2 8 42 3 0 45 3 2 CONDENSER VOLUME SRK 13H UNIT 226 CU IN Note Pressure data is recorded at 5 minutes into freezing cycle The data not in bold should be used for reference only 28 29 29 2621 2591 2665 APPROXIMATE ICE PRODUCTION PER 24 HR AMBIENT TEMP ºF ºC WATER TEMP ºF ºC 50 10 70 21 90 32 APPROXIMATE ELECTRIC CONSUMPTION 2648 2628 2655 2633 2602 2658 2628 2580 2625 APPR...

Страница 30: ...30 2 KMS 1230MLH SRK 13H3 Intentionally Left Blank ...

Страница 31: ...ernal filter no water flow If the reservoir fills but the unit fails to start harvest check for open lower float switch see II F 3 Float Switch Check Procedure or bad 1 minute timer in control board See II C 4 Control Board Check Procedure 4 Initial Harvest Cycle LEDs 1 4 and 2 are on The contactor coil energizes to start the compressor and fan motors the hot gas valves energize also energizing th...

Страница 32: ...on the second activation of the lower float switch and after 5 minutes of freeze Diagnosis Minimum freeze time is 5 minutes During the first 5 minutes of freeze confirm that the evaporator temperature drops compressor fan motors pump motor and liquid line valves are energized and that the hot gas valves harvest water valve and fill water valve except during refill are de energized and not bypassin...

Страница 33: ...ves contaminants from the water reservoir through the drain water valve and allows for a power flush of the float switch Diagnosis If the pump motor does not come on check the circuit and capacitor If water does not pump out remove the drain water valve housing and check clean the valve assembly check for voltage on the drain valve coil with LED 3 on make sure that the drain line is not clogged 7 ...

Страница 34: ... Loose connection 1 Tighten e Fuse Icemaker fused disconnect if any 1 Blown 1 Check for short circuit and correct Reset or replace f Fuse 10A fuse in icemaker 1 Blown 1 Check for short circuit and replace g Control Switch 1 OFF position 1 Move to ICE position 2 Bad contacts 2 Check for continuity and replace 3 Loose connection 3 Tighten h Transformer 1 Open windings 1 Replace i Bin Control 1 Tripp...

Страница 35: ...arness Terminal Block Condensing Unit and Icemaker 1 Loose connection 1 Tighten d Magnetic Contactor 1 Bad contacts 1 Check for continuity and replace 2 Coil winding opened 2 Replace e Starter 1 Bad contacts 1 Check and replace 2 Coil winding opened 2 Replace f Start Capacitor or Run Capacitor 1 Defective 1 Replace g Overload Protector 1 Bad contacts 1 Check for continuity and replace 2 Voltage to...

Страница 36: ...or clean 6 Mechanical seal worn out 6 Check and replace e Control Board 1 Defective 1 See II C 4 Control Board Check Procedure 6 Fan motor will not start or is not operating a Fan Motor 1 Motor winding opened 1 Replace 2 Bearing worn out 2 Replace 3 Wiring to fan motor 3 Check for loose connection or open and replace 4 Defective capacitor 4 Replace 5 Fan blade bound 5 Check and replace b Magnetic ...

Страница 37: ...Water Temperature 1 Too cool 1 Increase temperature f Liquid Line Valve 1 Continues to open in harvest cycle 1 Check operation in harvest cycle and replace g Thermistor 1 Out of position or loose attachment 1 See V C 6 Removal and Replacement of Thermistor h Control Board 1 Defective 1 See II C 4 Control Board Check Procedure 3 Other a Spray Tubes 1 Clogged 1 Clean 2 Out of position 2 Place in pos...

Страница 38: ...Cube Guide or Ice Separator 1 Out of position Circulated water falls into bin 1 Place in position b See chart 1 5 and check water supply line water valves water system pump motor and control board c Drain Water Valve 1 Leaking 1 Check and replace 2 Cloudy or irregular cubes a See chart 2 1 and 2 3 and check float switch water valves control board spray tubes water system refrigerant charge and exp...

Страница 39: ...vided with two service valves one on the low side and one on the high side For refrigerant recovery evacuation and recharge of the system always use the access valve on the receiver tank for the high side and either the shutoff valve of the condensing unit or the service valve of the icemaker unit for the low side line 1 Refrigerant Recovery Using proper refrigerant practices recover the refrigera...

Страница 40: ...frigerant charge should be exclusively for POE oils 2 Turn on the vacuum pump Never allow the oil in the vacuum pump to flow backwards 3 Allow the vacuum pump to pull down to a 29 9 Hg vacuum Evacuating period depends on pump capacity 4 Close the low side valve and high side valve on the service manifold 5 Disconnect the vacuum pump and attach a refrigerant service cylinder to the high side line R...

Страница 41: ...proved container 4 Remove the terminal cover on the compressor and disconnect the compressor wiring 5 Remove the hold down bolts washers and rubber grommets 6 Remove the discharge and suction pipes 7 Remove the compressor Unpack the new compressor package 8 Attach the rubber grommets of the prior compressor 9 Place the compressor in position and secure it using the bolts and washers 10 Remove the ...

Страница 42: ...as 140 PSIG and soap bubbles 10 Evacuate the system and charge it with refrigerant See the nameplate on the condensing unit for the required refrigerant charge 11 Replace the panels in their correct positions 12 Turn on the power supply 3 Removal and Replacement of Hot Gas Valve and Liquid Line Valve CAUTION 1 The condensing unit has 1 hot gas valve and 1 liquid line valve Both valves have a strai...

Страница 43: ...econnect using closed end connectors 12 Connect the new solenoid leads 13 Attach the solenoid to the valve body and secure it with a screw 14 Replace the panels in their correct positions 15 Turn on the power supply 4 Removal and Replacement of Headmaster Condensing Pressure Regulator C P Regulator IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not rep...

Страница 44: ...n motor bracket and fan motor 5 Install the new fan motor and replace the removed parts in the reverse order of which they were removed 6 Replace the panels in their correct positions 7 Turn on the power supply C Icemaker IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made Insta...

Страница 45: ...e panels in their correct positions 14 Turn on the power supply 2 Removal and Replacement of Expansion Valve IMPORTANT 1 Sometimes moisture in the refrigerant circuit exceeds the drier capacity and freezes up at the expansion valve Always install a new drier every time the sealed refrigeration system is opened Install the new drier with the arrow on the drier in the direction of the refrigerant fl...

Страница 46: ...cement of Hot Gas Valve and Liquid Line Valve CAUTION 1 The icemaker unit has 1 hot gas valve and 1 liquid line valve The hot gas valve has a strainer prior to the valve body It is advisable to change the strainer and check valves when replacing the hot gas valve 2 Always use a copper tube of the same diameter and length when replacing the hot gas and liquid lines otherwise performance may be redu...

Страница 47: ...and Replacement of Pump Motor 1 Turn off the power supply 2 Remove the panels 3 Drain the water tank by removing the insulation panel front frame and suction hose See Fig 3 4 Disconnect the pump suction and discharge hoses 5 Unplug the water pump connector 6 Remove the screws and pump motor bracket 7 Remove the pump housing and check the impeller 8 If the impeller is defective install a new impell...

Страница 48: ... panels 3 Remove the control box cover 4 Disconnect the thermistor leads from the K3 connector on the control board 5 Remove the plastic cable ties foam insulation thermistor holder and thermistor 6 Scrape away the old sealant on the thermistor holder and the suction pipe 7 Wipe off moisture or condensation on the suction pipe 8 Smoothly apply recommended sealant KE4560RTV Part Code 60Y000 11 or 4...

Страница 49: ...ply and turn it on after 3 minutes The defrost cycle starts and the cubes will be removed from the evaporator 3 Turn off the power supply Remove the front panel 4 Place the control switch in the SERVICE position Then place the service switch in the DRAIN position 5 Replace the front panel and turn on the power supply for 2 minutes 6 Turn off the power supply 7 Remove the front panel 8 In bad or se...

Страница 50: ...n 24 Turn on the power supply to rinse off the cleaning solution 25 Turn off the power supply after 5 minutes 26 Remove the front panel 27 Move the service switch to the DRAIN position 28 Replace the front panel and turn on the power supply for 2 minutes 29 Turn off the power supply Remove the front panel 30 Repeat the above steps 17 through 29 three more times to rinse thoroughly Note If you do n...

Страница 51: ...e bin is for ice use only Do not store anything else in the bin Keep the scoop clean Clean it by using a neutral cleaner and rinse thoroughly Clean the bin liner by using a neutral cleaner Rinse thoroughly after cleaning 3 Condenser Check the condenser once a year and clean the coil if required by using a brush or vacuum cleaner More frequent cleaning may be required depending on the location of t...

Страница 52: ...n and the control switch to the SERVICE position 10 Using the same hose as with the harvest water valve blow out the wash valve using compressed air or carbon dioxide 11 Move the service switch to the CIRC position and the control switch to the OFF position 12 Remove the 4 hoses connected to the water tank Allow the tank and hoses to completely drain 13 Move the control switch to the ICE position ...

Страница 53: ...53 Harvest Water Valve Hose Harvest Water Valve Wash Valve Fill Water Valve Drain Water Valve Fill Water Valve Hose Float Switch Vent Hose Suction Hose Drain Hose Tee Fig 5 ...

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