B. Component Service Information. Hoshizaki KMD-850MAH, KMD-850MWH, KMD-850MRH

B. Component Service Information

NOTICE

When replacing a component listed below, see the notes to help ensure proper operation.

Component

Compressor

Thermostatic

Expansion Valves

Notes

1 phase: Install a new start capacitor, run capacitor, and start relay.

3 phase: Install a new magnetic contactor.

• Attach the thermostatic expansion valve bulb to the suction line in the same location as the previous bulb.

• The bulb should be between the 10 and 2 o'clock positions on the tube.

• Secure the bulb with the clamp and holder, then insulate it.

• Replace the strainer if applicable.

• Use copper tube of the same diameter and length when replacing valve lines.

Hot Gas Valves

Liquid Line

Valves

Fan Motors

Pump Motor

Thermistor

KM-650MWH-M

Water Regulating

Valve

Install a new capacitor.

Install a new capacitor.

• Attach the new thermistor to the suction line in the same location as the previous thermistor.

• The thermistor should be at the 12 o'clock position on the tube.

• Smoothly fill the recessed area of the thermistor holder with high thermal conductive type sealant. Hoshizaki America part number 4A0683-01 (Silicone Heat Sink Compound

10-8108 manufactured by GC Electronics), KE-4560 RTV (manufactured by ShinEtsu

Silicones), or equivalent are recommended.

• Secure the thermistor with the holder, then insulate it.

• Be very careful to prevent damage to the leads.

Tighten the water regulating valve flare nut to a torque of 39.8 ft-lb/53.9 N·m.

C. Adjustment of Water Regulating Valve - Water-Cooled Model Only

The water regulating valve (also called "water regulator") is factory-adjusted. No adjustment is required under normal use. Adjust the water regulator, if necessary, using the following procedures.

1) Prepare a thermometer to check the condenser drain temperature. Attach a pressure gauge to the high-side line of the system.

Adjustment Screw

2) Five minutes after a freeze cycle starts, confirm that the thermometer reads 104°F to 115°F (40°C to 46°C). If it does not, rotate the adjustment screw by using a flat blade screwdriver until the temperature is in the proper range. See Fig. 3. Next, check

CW – Higher

CCW – Lower that the reference pressure is in the range indicated in the Head Pressure table in the

Performance Data section. If it is not in the proper range, verify the refrigerant charge.

Top View Fig. 5

3) Check that the condenser drain temperature is stable.

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VI. Maintenance

The maintenance schedule below is a guideline. More frequent maintenance may be required depending on water quality, the appliance's environment, and local sanitation regulations

WARNING

• Only qualified service technicians should service the appliance.

• To reduce the risk of electric shock, do not touch the control switch or service switch with damp hands

• Before servicing: Move the control switch to the "OFF" position and turn off the power supply. Place the disconnect in the "OFF" position.

Lockout/Tagout to prevent the power supply from being turned back on inadvertently.

• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after any maintenance is done to the icemaker. Make sure that none have fallen into the dispenser unit/ice storage bin.

Maintenance Schedule

Frequency Area Task

Daily Scoop

Bi-Weekly Air Filters

Monthly External Water

Filters

Clean the ice scoop using a neutral cleaner. Rinse thoroughly after cleaning.

Inspect. Wash with warm water and neutral cleaner if dirty.

Check for proper pressure and change if necessary.

Icemaker Exterior Wipe down with a clean, soft cloth. Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up. Clean any chlorine staining

(rust colored spots) using a non-abrasive cleanser.

Yearly

Underside of

Icemaker and Top

Kits; Bin Door and

Snout

Wipe down with a clean cloth and warm water.

Icemaker and

Dispenser Unit/Ice

Storage Bin Liner

Clean and sanitize per the cleaning and sanitizing instructions provided in the instruction manual or maintenance label on the icemaker.

Water Supply Inlet Close the icemaker water supply line shut-off valve and drain the water system. Clean the water supply inlet screen.

Condenser

Water Hoses

As Needed Marine Model

Condenser

Inspect. Clean if necessary by using a brush or vacuum cleaner. More frequent cleaning may be required depending on location.

Inspect the water hoses and clean/replace if necessary.

If contaminated seawater enters the system, flush with clean seawater or fresh water as soon as possible to minimize damage to the condenser.

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VII. Preparing the Icemaker for Long Storage

CAUTION

When shutting off the icemaker for an extended time, drain out all water from the water line and remove the ice from the storage bin/dispenser unit. The bin/ dispenser should be cleaned and dried. Drain the icemaker to prevent damage to the water supply line at sub-freezing temperatures, using air or carbon dioxide. Shut off the icemaker until the proper ambient temperature is resumed.

When the icemaker is not used for two or three days, it is sufficient to only move the control switch to the "OFF" position, unless the icemaker will be at sub-freezing temperatures.

1. On water-cooled model only, first remove the water from the water-cooled condenser:

1) Turn off the power supply and remove the front panel and right side panel.

2) Close the condenser water supply line shut-off valve and open the condenser water supply line drain valve.

3) Attach a compressed air or carbon dioxide supply to the condenser water supply line drain valve.

4) Open the water regulating valve by using a screwdriver to pry up on the spring retainer underneath the spring. While holding the valve open, blow out the condenser using the compressed air or carbon dioxide supply until water stops coming out.

5) Close the condenser water supply line drain valve and replace the right side panel in its correct position.

2. Remove the water from the icemaker water supply line:

1) If you have not already done so, turn off the power supply and remove the front panel.

2) Close the icemaker water supply line shut-off valve and open the icemaker water supply line drain valve.

3) Allow the line to drain by gravity.

4) Attach a compressed air or carbon dioxide supply to the icemaker water supply line drain valve.

5) Make sure at least 3 minutes have elapsed since you turned off the power supply. Make sure the control switch is in the "ICE" position. Replace the front panel in its correct position and turn on the power supply.

6) Blow the icemaker water supply line out using the compressed air or carbon dioxide supply.

7) Close the icemaker water supply line drain valve.

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3. Drain the water tank:

1) Turn off the power supply.

2) Move the control switch to the "OFF" position.

3) Remove the insulation panel. Remove cube guide B, then remove cube guide A.

Remove the overflow cap, overflow pipe, and water shield. See Fig. 7.

4) Remove the drain plug.

5) Remove all ice from the storage bin/dispenser unit. Clean the storage bin/dispenser unit using a neutral cleaner. Rinse thoroughly after cleaning.

6) Replace the drain plug, water shield, overflow pipe, overflow cap, cube guide A, cube guide B, and insulation panel in their correct positions. Be careful not to cross thread the drain plug or overflow pipe.

7) Replace the front panel in its correct position.

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VIII. Disposal

The appliance contains refrigerant and must be disposed of in accordance with applicable national, state, and local codes and regulations. Refrigerant must be recovered by properly certified service personnel.

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