Timer Board; [A] Solid-State Control; [B] Timer Board - Hoshizaki FM-170AFE Service Manual

3. TIMER BOARD

[a] SOLID-STATE CONTROL

1) An exclusive HOSHIZAKI solid-state control is employed in FM-170AFE and FM-170AFE-
N modular icemakers.
2) A Printed Circuit Board (hereafter called "Timer Board") includes a stable and high-quality
control system.
3) No adjustment is required.

[b] TIMER BOARD

1. Fragile, handle very carefully.
2. A timer board contains CMOS (Complementary Metal-Oxide Semiconductor)
integrated circuits, which are susceptible to failure due to static discharge. It
is especially important to either wear an anti-static wrist strap or touch a
metal part of the machine before servicing to be static free.
3. Do not touch the electronic devices on either side of the board to prevent
damage.
4. Do not change wiring and connections. Especially, never misconnect
terminals.
5. Do not repair the electronic devices or parts on the board in the field. Always
replace the whole board assembly when it fails.
The icemaker is controlled by the Timer Board for the following purposes:
1) To prevent the Gear Motor and the Compressor from starting or stopping simultaneously.
2) To reduce ice remaining in the Evaporator.
3) To protect the unit in case of low water and low water pressure.
4) To protect the unit from short cycling if the Bin Control resets quickly.
CAUTION
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