Relays; Switches; Power Switch; Flush/Control Switch - Hoshizaki F-330BAH Service Manual

C. Relays
X5 (C-0 and earlier) and X10 (C-1 and later)- Control Relay: Relay energizes
when power switch is "ON," safety switch closed (if applicable), safety relay
(if applicable) de-energized, BC closed, and flush/control switch in "ICE" position.
Once energized, relay allows 24VAC to X4 relay (C-0 and earlier) or X11 relay
(C-1 and later) for WV initiation and prevents DV from energizing during icemaking
process.
X4 (C-0 and earlier) and X11 (C-1 and later)- Water Control Relay: Relay allows WV
to energize when relay is de-energized. As water fills the reservoir, UFS closes,
energizing relay. Once energized, relay de-energizes WV and closes CB 35VDC
circuit between CB #3 (BR) and #4 (DBU) for GM operation.
X3 (C-0 and earlier) and X12 (C-1 and later)- Compressor Delay Relay: Relay energizes
with GM and starts the 90 sec. Comp delay timer (35VDC circuit at CB
#10 (W/BK) and #11 (W/O)) and on C-1 and later models, energizes the
evaporator heater (#5 (W/R) and #3 (P)) during the icemaking process. When
de-energized, relay allows for DV operation during off cycles. This prevents DV
from energizing during the icemaking process.
X6 (C-0 and earlier)- Relay energizes when safety switch closes, de-energizing X5 relay
and energizing lamp until the safety switch is reset (opened).
Legend: BC–bin control; CB–control board; Comp–compressor; DV–drain valve;
EH–evaporator heater; FM–fan motor; GM–gear motor; UFS–upper float switch;
WV–inlet water valve
D. Switches
2 switches are used to control the operation of the appliance. These switches are
referred to as the power switch and flush/control switch. They are located on the control
box.

1. Power Switch

The power switch has 2 positions: "OFF" and "ON."

2. Flush/Control Switch

The flush/control switch has 2 positions:
Flush Switch C-0 and Earlier: "ICE" and "FLUSH."
Control Switch C-1 and Later: "ICE" and "DRAIN."
In the "ICE" position, X5 (C-0 and earlier) or X10 (C-1 and later) relay is energized, DV is
de-energized and the icemaking process begins.
In the "FLUSH" or "DRAIN" position, X5 (C-0 and earlier) or X10 (C-1 and later) is
de-energized and flush/drain valve is energized. 90 sec. shutdown sequence starts if
moved from "ICE" with power switch "ON."
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