Hoshizaki KM-650MAH, KM-650MRH, KM-650MWH service manual Cleaning Procedure

Page 51

1.Cleaning Procedure

1)Dilute approximately 16 fl. oz. of the recommended cleaner Hoshizaki "Scale Away" or "LIME-A-WAY" (Economics Laboratory, Inc.) with 3 gal. (11 l) of water.

2)Remove all ice from the evaporator and the storage bin.

Note: To remove cubes on the evaporator, turn off the power supply and turn it on after 3 minutes. The harvest cycle starts and the cubes will be removed from the evaporator.

3) Turn off the power supply.

 

4)

Remove the front panel and the base

 

 

cover, and then remove the insulation

 

 

panel by lifting up the panel slightly and

 

 

pulling it towards you.

 

5)

Remove one end of the pump tubing (see

 

 

Fig. 4). Drain the water tank. Replace the

Fig. 4

 

pump tubing in its correct position.

6)In bad or severe water conditions, clean the float switch assembly as described below. Otherwise, continue to step 7.

a.Remove the float switch assembly from the mounting bracket and remove the rubber boot from the bottom of the assembly.

b.Remove the retainer rod from the bottom of the float switch assembly, then remove the float. Be careful not to bend the retainer rod excessively when removing it.

c.Wipe down the float switch assembly's housing, shaft, float, and retainer rod with cleaning solution. Wipe the inside of the rubber boot with cleaning solution.

d.Reassemble the float switch assembly and replace it and the rubber boot in their correct positions.

7)Pour the cleaning solution into the water tank.

8)Fully open the cleaning valve on the left side wall of the machine compartment.

9)Move the control switch on the control box to the "WASH" position.

10)Replace the insulation panel and the front panel in their correct positions.

11)Turn on the power supply and start the washing process.

12)Turn off the power supply after 30 minutes.

13)Remove the front panel.

14)Remove one end of the pump tubing. Drain the water tank. Replace the pump tubing in its correct position.

15)Move the control switch to the "ICE" position.

16)Close the cleaning valve.

Note: The icemaker will not operate unless the cleaning valve is completely closed.

17)Replace the front panel in its correct position.

18)Turn on the power supply to fill the water tank with water.

19)Turn off the power supply after 3 minutes.

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Contents KM-650MAH KM-650MWH KM-650MRH Hoshizaki AMERICA, INC Contents Page KM-650MAH air-cooled Specifications IcemakerWater Cooled Condenser KM-650MWH water-cooledKM-650MRH remote air-cooled URC-5F Condensing UnitModel URC-5F SpecificationsII. General Information Construction KM-650MWH water-cooled KM-650MRH remote air-cooled Sequence of Operation Cycle Steps Harvest Cycle Freeze Cycle One Minute Control Board Control Products E Control Board Control Board LayoutControl Board Maximum Water Supply Period 6 minutes FeaturesLED Lights and Audible Alarm Safeties Default Dip Switch Settings Controls and AdjustmentsHarvest Timer dip switch 1 Pump-Out Frequency Control dip switch 5 Control Board Replacement Control Board Check ProcedureKM-650MAH air-cooled KM-650MWH water-cooled KM-650MRH remote air-cooled KM-650MAH air-cooled and KM-650MWH water-cooled Wiring DiagramsPsig 108 Performance Data680 615 IV. Service Diagnosis Minute KM Diagnostic Procedure No Ice Production Diagnostic ChartsProblem Possible Cause Remedy Problem Possible Cause Remedy Problem Possible Cause Remedy Evaporator is Frozen Up Low Ice Production Abnormal IceOther Problem Possible Cause Remedy Evacuation and Recharge R-404A Removal and Replacement of ComponentsService for Refrigerant Lines Refrigerant RecoveryBrazing Removal and Replacement of CompressorRemoval and Replacement of Drier Removal and Replacement of Expansion Valve Removal and Replacement of Hot Gas Valve and Line Valve Removal and Replacement of Evaporator Adjustment of Water Regulating Valve Water-Cooled Model Only Page Removal and Replacement of Fan Motor Removal and Replacement of ThermistorRemoval and Replacement of Pump Motor Removal and Replacement of Inlet Water ValveRemoval and Replacement of Spray Tubes Cleaning and Sanitizing Procedures VI. Cleaning and Maintenance InstructionsCleaning Procedure Maintenance Sanitizing Procedure Following Cleaning ProcedureStainless Steel Exterior Condenser air-cooled and remote air-cooled models only Preparing the Icemaker for Long StorageStorage Bin and Scoop Air Filters air-cooled models onlyDrain the potable water tank Drain the potable water supply line
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