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![VI. Maintenance. Hoshizaki KMD-850MAH, KMD-850MWH, KMD-850MRH | Manualzz VI. Maintenance. Hoshizaki KMD-850MAH, KMD-850MWH, KMD-850MRH | Manualzz](http://s1.manualzz.com/store/data/006274058_1-251b213b0914c1cb3493284fc5938f69-360x466.png)
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.
51
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Table of contents
- 5 I. Specifications
- 5 A. Icemaker
- 5 1. KMD-850MAH (air-cooled)
- 6 2. KMD-850MWH (water-cooled)
- 7 3. KMD-850MRH (remote air-cooled)
- 8 B. Condenser Unit
- 8 1. URC-9F
- 10 II. General Information
- 10 A. Construction
- 10 1a. Air-Cooled Auxiliary Code C-0 and Earlier
- 11 1b. Air-Cooled Auxiliary Code C-1 and Later
- 12 2a. Water-Cooled Auxiliary Code C-0 and Earlier
- 13 2b. Water-Cooled Auxiliary Code C-1 and Later
- 14 3a. Remote Air-Cooled Auxiliary Code C-0 and Earlier
- 15 3b. Remote Air-Cooled Auxiliary Code C-1 and Later
- 16 B. Sequence of Operation
- 16 1. One Minute Fill Cycle
- 16 2. Initial Harvest Cycle
- 16 3. Freeze Cycle
- 16 4. Pump-Out Cycle
- 17 5. Normal Harvest Cycle
- 19 C. Control Board
- 20 1. Control Board Layout
- 21 2. Features
- 21 a) Maximum Water Supply Period – 6 minutes
- 21 b) Harvest Backup Timer and Freeze Timer
- 21 c) High Temperature Safety
- 21 d) Low Water Safety
- 21 e) High Voltage and Low Voltage Cut-outs
- 22 f) LED Lights and Audible Alarm Safeties
- 23 3. Controls and Adjustments
- 23 a) Default Dip Switch Settings
- 23 b) Harvest Timer (S4 dip switch 1 & 2)
- 24 c) Pump-Out Timer (S4 dip switch 3 & 4)
- 24 d) Pump-Out Frequency Control (S4 dip switch 5 & 6)
- 25 e) S4 Dip Switch 7 & 8
- 25 f) Freeze Timer (S4 dip switch 9 & 10)
- 25 g) Float Switch Control (S5 dip switch 1 through 5)
- 25 4. Control Board Check Procedure
- 26 5. Control Board Replacement
- 26 D. Harvest Control – Thermistor
- 26 1. Thermistor Check Procedure
- 26 E. Float Switch
- 26 1. Float Switch Check Procedure
- 28 2. Float Switch Cleaning
- 29 F. Bin Control
- 29 1. Explanation of Operation
- 29 2. Bin Control Check Procedure
- 30 III. Technical Information
- 30 A. Water Circuit and Refrigeration Circuit
- 30 1. Air-Cooled Model
- 31 2. Water-Cooled Model
- 32 3. Remote Air-Cooled Model
- 33 B. Wiring Diagrams
- 33 1a. KMD-850MAH Auxiliary Code C-0 and Earlier
- 33 KMD-850MWH Auxiliary Code C-1 and Earlier
- 34 1b. KMD-850MRH Auxiliary Code C-0 and Earlier
- 35 2. KMD-850MAH and KMD-850MRH Auxiliary Code C-1 and Later
- 35 KMD-850MWH Auxiliary Code C-2 and Later
- 36 C. Performance Data
- 36 1. KMD-850MAH (air-cooled)
- 37 2. KMD-850MWH (water-cooled)
- 38 3. KMD-850MRH (remote air-cooled)
- 39 IV. Service Diagnosis
- 39 A. 10-Minute Diagnostic Procedure
- 41 B. Diagnostic Charts
- 41 1. No Ice Production
- 44 2. Evaporator is Frozen Up
- 45 3. Low Ice Production
- 46 4. Abnormal Ice
- 46 5. Other
- 47 V. Refrigeration Circuit and Component Service Information
- 47 A. Refrigeration Circuit Service Information
- 47 1. Refrigerant Recovery
- 48 2. Brazing
- 48 3. Evacuation and Recharge (R-404A)
- 50 B. Component Service Information
- 50 C. Adjustment of Water Regulating Valve - Water-Cooled Model Only
- 51 VI. Maintenance
- 52 VII. Preparing the Icemaker for Long Storage
- 54 VIII. Disposal