Hoshizaki KM-901MWH - Manual (Page 26)

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C. Control Board
• A Hoshizaki exclusive solid-state control board is employed in KM-901MAH,
KM-901MWH, and KM-901MRH/3 Modular Crescent Cubers.
• All models are pretested and factory set.
CAUTION
1. The control board is fragile; handle very carefully.
2. The control 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 before handling or replacing the control board.
3. Do not touch the electronic devices on the control board or the back of the
control board.
4. Do not change wiring and connections. Do not misconnect K3, K4, and K5,
because the same connector is used for the thermistor, mechanical bin
control, and float switch. K4 is not used on "E" control board models.
5. Always replace the whole control board assembly if it goes bad.
6. Do not short out power supply to test for voltage.