Table Of Contents - Hoshizaki KMD-900MRH Service Manual

Please review this manual. It should be read carefully before the icemaker is serviced or
maintenance operations are performed. Only qualified service technicians should
service and maintain the icemaker. This manual should be made available to the
technician prior to service or maintenance.
I. Specifications .................................................................................................................... 5
1. KMD-700MAH .............................................................................................................. 5
2. KMD-700MWH ............................................................................................................. 6
3. KMD-700MRH .............................................................................................................. 7
4. KMD-900MAH .............................................................................................................. 8
5. KMD-900MWH ............................................................................................................. 9
6. KMD-900MRH ............................................................................................................ 10
7. Condensing Unit......................................................................................................... 11
URC-12F .................................................................................................................. 11
II. General Information ........................................................................................................ 13
1. Construction ............................................................................................................... 13
[a] KMD-700MAH ..................................................................................................... 13
[b] KMD-700MWH .................................................................................................... 14
[c] KMD-700MRH ..................................................................................................... 15
[d] KMD-900MAH ..................................................................................................... 16
[e] KMD-900MWH .................................................................................................... 17
[f] KMD-900MRH ...................................................................................................... 18
2. Controller Board ......................................................................................................... 19
[a] Solid-State Control .............................................................................................. 19
[b] Controller Board .................................................................................................. 19
[c] Sequence ............................................................................................................ 23
[d] Controls and Adjustments ................................................................................... 26
[e] Checking the Controller Board ............................................................................ 30
3. Mechanical Bin Control .............................................................................................. 31
[a] Proximity Switch .................................................................................................. 31
[b] Explanation of Operation ..................................................................................... 31
[c] Troubleshooting ................................................................................................... 32
III. Technical Information ..................................................................................................... 33
1. Water Circuit and Refrigerant Circuit........................................................................... 33
[a] KMD-700MAH and KMD-900MAH ...................................................................... 33
[b] KMD-700MWH and KMD-900MWH .................................................................... 34
[c] KMD-700MRH and KMD-900MRH ...................................................................... 35
2. Wiring Diagrams ......................................................................................................... 36
[a1] KMD-700MAH and KMD-700MWH (auxiliary code R-0 and earlier) ................. 36
[a2] KMD-700MAH and KMD-700MWH (auxiliary code R-1 and later) .................... 37
[b1] KMD-700MRH (auxiliary code R-0 and earlier) ................................................ 38
[b2] KMD-700MRH (auxiliary code R-1 and later) .................................................... 39
[c1] KMD-900MAH and KMD-900MWH (auxiliary code R-0 and earlier) ................. 40
[c2] KMD-900MAH and KMD-900MWH (auxiliary code R-1 and later) .................... 41
[d1] KMD-900MRH (auxiliary code R-0 and earlier) ................................................. 42
[d2] KMD-900MRH (auxiliary code R-1 and later) .................................................... 43
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