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CONTENTS
Important Safety Information ................................................................................................. 6
I. Construction and Water/Refrigeration Circuit Diagram ....................................................... 8
A. KM Construction............................................................................................................ 8
1. Air-Cooled Models (SAH/3) ...................................................................................... 8
2. Water-Cooled Models (SWH/3/-M) .......................................................................... 9
3. Remote Models (SRH/3) ....................................................................................... 10
B. KMH Construction ........................................................................................................11
1. Water-Cooled Models (SWH/3) ...............................................................................11
2. Remote Models (SRH/3) ....................................................................................... 12
C. Bin Control .................................................................................................................. 13
1a. Single Thermostatic Bin Control .......................................................................... 13
1b. Stacked Thermostatic Bin Control ....................................................................... 13
2a. Single Mechanical Bin Control............................................................................. 14
2b. Stacked Mechanical Bin Control .......................................................................... 14
D. Water/Refrigeration Circuit Diagram ............................................................................ 15
1. Air-Cooled Models (SAH/3) .................................................................................... 15
2. Water-Cooled Models (SWH/3/-M) ........................................................................ 16
3a. Remote Models (SRH/3) Except KM-2500SRH3 ................................................ 17
3b. Remote Models (SRH3) KM-2500SRH3 ............................................................. 18
II. Sequence of Operation and Service Diagnosis ............................................................... 19
A. Sequence of Operation Flow Chart ............................................................................. 19
1. "E" and "G" Control Board without Harvest Pump Timer Operation ....................... 19
2. "G" Control Board with Harvest Pump Timer Operation ....................................... 20
3a. Thermostatic Bin Control Shutdown .................................................................... 21
3b. Mechanical Bin Control Shutdown ....................................................................... 22
B. Service Diagnosis ....................................................................................................... 23
1. "E" and "G" Control Board without Harvest Pump Timer Diagnosis ....................... 24
2. "G" Control Board with Harvest Pump Timer Diagnosis ........................................ 29
C. Control Board Check ................................................................................................... 35
D. Bin Control Check ....................................................................................................... 36
1. Thermostatic Bin Control Check ............................................................................. 36
2. Mechanical Bin Control Check ............................................................................... 37
E. Float Switch Check and Cleaning ............................................................................... 39
1. Float Switch Check ................................................................................................ 39
2. Float Switch Cleaning ............................................................................................ 40
F. Thermistor Check ......................................................................................................... 41
G. Diagnostic Tables ........................................................................................................ 42
IMPORTANT
This manual should be read carefully before the appliance is serviced. Read
the warnings and guidelines contained in this manual carefully as they provide
essential information for the continued safe use, service, and maintenance of the
appliance. Retain this manual for any further reference that may be necessary.
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