Controller Board; [A] Solid-State Control; [B] Controller Board - Hoshizaki KMD-900MRH Service Manual

2. Controller Board

[a] Solid-State Control

1) A HOSHIZAKI exclusive solid-state control is employed in KMD Modular Crescent
Cubers.
2) A printed circuit board (hereafter called "controller board") includes a stable and high
quality control system.
3) All models are pretested and factory-adjusted.

[b] Controller Board

1. Fragile, handle very carefully.
2. A controller board contains integrated circuits, which are susceptible to
failure due to static discharge. It is especially important to touch the metal
part of the unit when handling or replacing the board.
3. Do not touch the electronic devices on the board or the back of the board
to prevent damage to the board.
4. Do not change wiring and connections. Do not misconnect K3, K4 and
K5, because the same connector is used for the thermistor (white), float
switch (black), and mechanical bin control (red).
5. Always replace the whole board assembly when it goes bad.
6. Do not short out power supply to test for voltage.
Part Number
2A1410-01
Features of Control Products "E" Controller Board
1) Maximum Water Supply Period - 6 minutes
Water solenoid valve opening, in the defrost (harvest) cycle, is limited by the defrost
timer. The water valve cannot remain open longer than the maximum period. The
water valve can close in less than six minutes if the defrost cycle is completed.
CAUTION
Type
HOS-001A (Control Products)
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