Service Manual for Meridian Ice Maker-Dispensers Models HID312, HID525 and HID540
HID312, HID525, HID540 Service Manual Introduction The ice maker-dispensers covered in this manual were designed by to be the finest on the market. Their design is a result of Scotsman’s long experience in ice maker-dispensers. HID312 is 16 inches wide and air cooled only. HID540 is also 21 inches wide, but it is 40.9 inches tall. it is also available either air or water cooled. Observe any caution or warning notices. They are important and provide notice of potential hazards.
HID312, HID525, HID540 Service Manual Specifications The ice maker-dispenser is designed to be installed indoors, in a controlled environment. Although it can operate in a wide range of air and water temperatures, it will provide the best performance if not subject to extremes. Air Temperature Limitations • Maximum: 100oF. or 38oC. • Minimum: 50oF. or 10oC. The warranty statement for this product is provided separately from this manual. Refer to it for applicable coverage.
April 2015 Page 4 10.2 4.00 OPTION LEGS ADJUSTABLE ICE CHUTE REMOVABLE AIR FILTER AIR FLOW 34.6 13.62 FRONT VIEW 41.5 16.36 WATER CHUTE 41.3 16.25 0.3 .12 AIR FLOW 88.6 34.88 27.9 11.00 59.7 23.50 7.7 3.02 RIGHT SIDE VIEW 36.8 14.50 61.9 24.38 10.2 4.00 5.1 2.01 UTILITY CHASE 9.7 3.80 UTILITY CHASE POWER CORD BACK VIEW 8.3 3.25 3/4" FPT DRAIN 4.6 1.80 3/8" FLARE WATER INLET 3 1.
April 2015 Page 5 10.2 4.00 OPTION LEGS ADJUSTABLE ICE CHUTE REMOVABLE AIR FILTER AIR FLOW FRONT VIEW 54.2 21.36 WATER CHUTE 54 21.25 47.3 18.62 AIR FLOW 0.3 .12 88.6 34.88 27.9 11.00 7.7 3.02 RIGHT SIDE VIEW 59.7 23.50 36.8 14.50 61.9 24.38 10.2 4.00 5.1 2.01 UTILITY CHASE 9.7 3.80 UTILITY CHASE POWER CORD 3 1.17 3/4" FPT DRAIN 17.8 7.00 12.5 4.94 18.9 7.45 5.1 2.00 BACK VIEW 3/8" FLARE WATER INLET 3/8 FPT CONDENSER WATER INLET (WC ONLY) 4.6 1.
April 2015 Page 6 10.2 4.00 OPTION LEGS ADJUSTABLE ICE CHUTE REMOVABLE AIR FILTER AIR FLOW 54.2 21.36 FRONT VIEW 47.3 18.62 54 21.25 AIR FLOW 0.3 .12 103.8 40.88 27.9 11.00 7.7 3.02 36.8 14.50 RIGHT SIDE VIEW 59.7 23.50 61.9 24.38 10.2 4.00 5.1 2.01 3 1.17 POWER CORD 9.7 3.80 UTILITY CHASE 3/4" FPT DRAIN 17.8 7.00 BACK VIEW 12.5 4.94 18.9 7.45 5.1 2.00 3/8" FLARE WATER INLET 3/8 FPT CONDENSER WATER INLET (WC ONLY) 4.6 1.
HID312, HID525, HID540 Service Manual Placement The location of the equipment should be selected with care. Consideration should be given to allow adequate space on the sides for air cooled models to breathe. Minimum clearances for air cooled models: Cafeteria applications. The unit can be placed in a cafeteria line for ice and water. As some users sometimes dispense too much ice, high volume use may require the drip tray to be occasionally cleared of spilled ice.
HID312, HID525, HID540 Service Manual Counter Installations Units placed on a counter must either use legs or be sealed to the counter top with food grade sealant per local codes. To avoid disturbing the seal, complete the installation prior to sealing. Panel Removal Remove one screw at bottom front of upper front panel, swing bottom of panel forward and lift off the unit. Note: Seal Chassis to Counter, do NOT Seal Drip Tray Legs 4” legs are optional for countertop applications.
HID312, HID525, HID540 Service Manual Differences Between Models Model Electrical Condenser Cabinet Type HID312A-1A HID525A-1A HID525W-1A HID540A-1A HID540W-1A HID312AW-1A HID525AW-1A HID540AW-1A HID312A-6A HID525A-6A 115/60/1 115/60/1 115/60/1 115/60/1 115/60/1 115/60/1 115/60/1 115/60/1 230/50/1 230/50/1 Air Air Water Air Water Air Air Air Air Air Counter Counter Counter Counter Counter Wall Mount Wall Mount Wall Mount Counter Counter Model Electrical Condenser Typical Watts Auger Motor Amps
HID312, HID525, HID540 Service Manual Component Location Photo-Electric Eye Ice Level Sensors Ice Making System Water Reservoir Agitator, Dispense Bar, Dispense Rotor Compressor Control Box Electronic Controller Condenser Compressor Ice Dispense Sensor Drain Basin and Manifold Water Dispense Sensor Drip Tray April 2015 Page 10
HID312, HID525, HID540 Service Manual Installation Installation should be done by an experienced ice machine installer. To locate one, call the number on the back of this manual or go to Scotsman’s website www.scotsman-ice.com to identify a local distributor or service company. The machine will require power, water and drain. Locate the water supply fitting on the lower back of the cabinet and obtain the correct fitting to connect the water supply. material to meet local codes.
HID312, HID525, HID540 Service Manual Start Up it with a locally approved sanitizer or a mixture of 1 ounce of household bleach to 2 gallons of water, allow to air dry. 1. Remove upper front panel 2. Open the water hand valve, observe that water enters the water reservoir, fills and then shuts off. Check for leaks. Repair any leaks before going any further. 3. Switch electrical supply on. Lights on controller will flash and then the power light will remain on. The code display will show O. 4.
HID312, HID525, HID540 Service Manual Operation: Ice and Water Vending During ice making soft ice is compressed thru a die and then broken off into irregular lengths. It will not be clear and, because of melting, when dispensed it will not be uniform in size or shape. Other notes: • An occasional drip may be seen from the ice dispense chute. This is normal and is from ice melting inside the chute. A continuous stream of water from the ice chute indicates a restricted bin drain.
HID312, HID525, HID540 Service Manual Controller All models use the same control system. The electronic controller operates the compressor (with fan motor), auger drive motor, dispense drive motor and inlet water solenoid valve.
HID312, HID525, HID540 Service Manual Controller Functions The controller has features for the service technician. Some details • Any auger motor failure is an immediate shut down. Because of the critical nature of that failure there is no auto restart from an auger error. • An open Water Sensor (dry probes) will stop the machine. Because water can be restored at any time, whenever both Water Sensor probes are wet again AND the compressor has been off for at least two minutes, ice making will restart.
HID312, HID525, HID540 Service Manual Maintenance and Cleaning 4. Remove screws holding lower front panel to unit and unplug lower panel sensors at the harness connection. Set panels aside. There are five areas of maintenance: 1. Drip tray and drain system 2. Air cooled condenser filter and condenser Dispense Sensor Harness Disconnect 3. Ice dispense bin and rotor 4. Photo eye ice level control 5. Ice making water system Drip Tray It is important to keep the drip tray clean of trash.
HID312, HID525, HID540 Service Manual Air filter The air filter on the left side of the cabinet will capture significant dust and lint during operation. As the dirt builds up it begins to restrict air flow and causes the refrigeration system to work longer to make ice. Clean the air filter regularly. To remove, pull it forward from the louvers. Do not leave it out for extended periods of time. Remove Top Panel To clean, wash it at a utility sink. Return it to the unit when clean. Condenser.
HID312, HID525, HID540 Service Manual Maintenance and Cleaning - Dispensing Bin Components The ice storage bin and rotor must be cleaned and sanitized on a regular basis, at a minimum when the ice making system is cleaned. Hand tools and hand protection like rubber gloves are recommended for this procedure. 10. Lift up and remove dispense rotor, set aside. Note: Some steps overlap with the procedure on the next page.
HID312, HID525, HID540 Service Manual Ice level controls Clean if the controller indicates bin full and there is no ice between the sensors. 1. Remove top front and top panels. 2. Shut machine off. 3. Disconnect ice level controls at connector. 4. Remove 3 screws and ice storage bin cover. 5. Pull each sensor grommet clip up and off. Clip Cover Sensor Grommet 6. Push grommets out of bin top. 7. Pull each sensor out of its rubber grommet. Pull on the part closest to the grommet, not the wire. 8.
HID312, HID525, HID540 Service Manual Dispensing Bin The dispensing bin may be removed for cleaning or to provide service access to other components. 1. Go thru steps 1 thru 10 of the Bin Cleaning Procedure above. 2. Remove chute cover. 6. Remove the chute mounting panel. 3. Remove ice sweep and ice discharge chute. Ice Discharge Chute Ice Sweep 7. Remove splash panel, disconnect sensors from harness and set panel aside. 4. Remove dispense motor drive pin. 8.
HID312, HID525, HID540 Service Manual Ice Making and Ice Dispensing System Cleaning Instructions Hand tools, cleaning supplies and hand protection are recommended for this procedure. Frequency: Recommended minimum time between cleanings is 6 months. To aid in determining if the machine has not been cleaned in 6 months, a Time To Clean light will glow after 6 months of power up time. Cleaning the machine with the following process will reset that light and the timer that controls it.
HID312, HID525, HID540 Service Manual 14. Push the Clean button. The unit will operate the auger motor for 30 minutes and then stop. Note: Stop at any time by pushing the On/Off button. 15. Disconnect unit from electrical power. 16. Drain the scale remover solution from the water system by pulling the reservoir drain hose from its plug and return it to the plug when drained. 17. Pour 24 ounces or .7 liters of clean, potable water into the reservoir. 18.
HID312, HID525, HID540 Service Manual Other Maintenance The auger in the ice making system is centered by bearings at the top and bottom. It is also sealed from leaking by a water seal at the bottom. The bearings are permanently lubricated and need no maintenance. The can be visually checked for obvious wear or damage but there is no need to add lubrication. Auger motor bearings and the gear reducer are also permanently lubricated and need no maintenance.
HID312, HID525, HID540 Service Manual Basic Troubleshooting Symptom No ice is dispensed Possible Cause No ice in bin Dispense motor not turning No water is dispensed Water drips from spout Dispense motor working, but ice in bin not moving No water to unit. Water valve not opening May be normal Bin drain may be plugged.
HID312, HID525, HID540 Service Manual Troubleshooting Symptom No ice in bin Possible Cause Auger motor not operating Compressor not operating Excessive noise Moaning noise when making ice Dispense motor not turning Compressor operating, auger turning, no ice is made Tubing contact Fan blade out of balance Compressor noisy Water seal being compressed No voltage to it Wrong voltage motor Dispense motor working, Broken ice agitator but ice in bin not moving Broken drive pin Too much ice in drip tray User
HID312, HID525, HID540 Service Manual Controller Diagnostics Code or Light Action O Probable Cause Unit manually switched off Suggested Action If desired, switch unit on. F Freeze mode None, unit is making ice. b Bin sensors sense bin full Check if bin is full. E Corrupted memory Replace controller C Clean mode Continue clean mode d Test mode 1 Auger motor rotated auger backwards. 2 Auger motor stalled or operating slowly None, allow unit to finish test mode. Replace auger motor.
HID312, HID525, HID540 Service Manual Test Procedures Dispensing Sensors Remove upper front panel, check controller indicator lights. Dispense sensor and system Test Hold Opaque Container in Front of Sensor Does Proper Dispensed Sensor Light Glow? No Replace Sensor Yes Sensor is working. Continue test. Does motor or water valve activate? No Push proper dispense button, its dispensed light is ON.
HID312, HID525, HID540 Service Manual Test Procedures Photo-Eye Bin Control Remove front panel. Check controller code display. If the unit is in ice making mode (status light on) there will normally either be an F or a b displayed. If the bin is full, b is displayed. If the bin is not full and the unit is in ice making mode, F is displayed. if the bin is not full and the unit is off, O is displayed. False bin full: If the bin is not full and b is displayed: 1.
HID312, HID525, HID540 Service Manual Test Procedures - Refrigeration The HID refrigeration system is steady-state. When in operation and stabilized, it will maintain nearly constant discharge and suction pressures. Capacitor Testing Items that can affect that are: Capacitors may be tested using a multimeter, but begin with a visual test. A good indication of a failed capacitor is one that is bulging or leaking. • Irregular water flow If the capacitor looks ok, check it with a multimeter.
HID312, HID525, HID540 Service Manual Test Procedures Auger and Gear Reducer Auger Note: The replacement motor is supplied attached to a gear reducer cover. Remove the motor from the cover and attach it to the gear reducer. The auger must be clean and undamaged to work properly. Remove it from the evaporator to confirm. Note: A wet auger will appear clean - dry it to check for scale. Scale Covered Auger A reversed motor code (1) is a strong symptom of a motor that should be replaced.
HID312, HID525, HID540 Service Manual Dispensing Motor Removal - must remove the bin 15. Locate two 3 prong knob bolts under the bin. Remove them. 1. Vend or melt out all ice. Note: Only add 16 oz or 1/2 liter water to the bin at a time, as excess water will drain out the spout. 2. Disconnect electrical power to unit. Electrical Shock Hazard Disconnect electrical power before beginning 3. Remove front, top, side and upper back panel. 16. Locate bin drain and disconnect it from bin fitting. 4.
HID312, HID525, HID540 Service Manual Photo Eye - Bin Control 1. Remove front panel. 2. Unplug photo eye from harness. b will be displayed on controller. 3. Remove 3 thumbscrews holding bin top to bin. 4. Lift top off bin. 5. Pull clip from each photo eye holder and push holder in to release. 6. Grasp the rubber holder and sensor, pull apart to separate. Note: Be sure to hold the sensor as close as possible to the holder. Do not pull on the wire. 7.
HID312, HID525, HID540 Service Manual Gear Reducer Removal - bin removal recommended 18. Disconnect wires to auger motor. 1. Vend or melt out all ice. 19. Remove 3 screws holding motor cover to motor. Note: Only add 16 oz or 1/2 liter water to the bin at a time, as excess water will drain out the spout. 20. Remove 4 screws holding rotation sensor holder to motor. 2. Disconnect electrical power to unit. Motor cover Electrical Shock Hazard Disconnect electrical power before beginning 3.
HID312, HID525, HID540 Service Manual Auger It is the manufacturer’s recommendation that the top bearing, bottom bearing and water seal be replaced at the same time. Extruder / Breaker 1. Remove top panel 2. Remove storage bin cover. 3. Slide chute cover back and remove. 4. Unscrew ice sweep. 5. Lift up and pull ice chute off evaporator. 6. Remove four 1/4 inch hex head socket screws. Auger Motor The auger motor may be replaced without removing the gear reducer.
HID312, HID525, HID540 Service Manual Evaporator 1. Go thru all steps to remove the auger. 7. Lift the evaporator up and off the bottom bearing retainer. The stationary half of the water seal will be in the bottom of the tube. The rotating half is on the auger. 2. Go thru all steps to remove the bin. 3. Recover the refrigerant charge. 4. Remove foam wrap from bottom of evaporator. 5. Remove the four 1/4 inch hex socket head screws at the bottom of the evaporator. 8. Confirm auger is un-damaged. 9.
HID312, HID525, HID540 Service Manual Water Seal and Auger Bearings Water Seal Top Bearing: 1. Go thru all steps to remove the auger. 1. Go thru the process of removing the extruder breaker. 2. Remove the 4 allen head screws at the bottom of the evaporator. 3. Lift the evaporator up and off the bottom bearing retainer. 4. Push the water seal up on one side until it twists, grab it and pull it out. 5. Remove the rotating half from the bottom of the auger. 2. Remove the clip holding the bearing. 3.
HID312, HID525, HID540 Service Manual HID312 Wiring Diagram BACK CONTROL BOX START CAPACITOR COMPRESSOR RELAY BN BN W 11 10 COND FAN (AIR COOLED ONLY) 12 13 R S R COMPRESSOR C 2 V 3 1 BK CONTACTOR V T1 T2 L1 L2 GN/Y EARTH GROUND 2 POWER IN COMPRESSOR OVERLOAD W ICE DISPENSE MOTOR BK Y O 1 BU Y R 8 7 6 5 4 3 2 1 O SOLENOID WATER AUGER DRIVE MOTOR R SPEED & DIRECTION SENSOR BIN FULL EMITTER (LED) R BK BU GN/Y WATER SENSOR CHASSIS GROUND RX/TX H20 HIGH PRESS CONTROL
HID312, HID525, HID540 Service Manual HID312 Schematic Diagram L2 OR N POWER SUPPLY - SEE NAMEPLATE L1 UNIVERSAL POWER SUPPLY AUGER DRIVE MOTOR AUGER DRIVE RELAY HPC C0IL CONTACTOR COMPRESSOR/FAN RELAY C0IL WATER DISPENSE MOTOR BIN DISPENSE CONTACTOR PRINTED CIRCUIT BOARD ASSEMBLY MOTOR COMPRESSOR April 2015 Page 38 FAN (AC ONLY)
HID312, HID525, HID540 Service Manual HID525 or 540 Wiring Diagram April 2015 Page 39
HID312, HID525, HID540 Service Manual HID525 or 540 Schematic Diagram April 2015 Page 40
SCOTSMAN ICE SYSTEMS 775 Corporate Woods Parkway Vernon Hills, IL 60061 USA 847-215-4500 800-726-8762 www.scotsman-ice.
