Switches - Hoshizaki DCM-300BAH Service Manual

D. Switches
The power switch, control switch, and dispense mode switch are used to control the
operation of the appliance.
1. Power Switch
WARNING! The power switch does not turn off all power
supply to the unit. 115VAC power supply is present on control
board K1 connector pin #2 (BR) and control board X1 relay
(BR) when the power switch is in the "OFF" position.
2. Control Switch
The control switch has 3 positions, "ICE," "OFF," and "DRAIN." See Fig. 11.
a) ICE
When the control switch is in the "ICE" position, 24VAC is
directed to control board K8 connector pin #1. 24VAC is present
between control board K8 connector pins #1 (power) and
pin #2 (neutral).
b) OFF
When the control switch is in the "OFF" position, 24VAC is
broken to control board K8 connector pin #1.
c) DRAIN
When the control switch is in the "DRAIN" position, 24VAC is
directed to control board K8 connector pin #1. 24VAC is present
between control board K8 connector pins #1 (power) and
pin #2 (neutral). Also, a 5VDC circuit is closed on control board
K9 connector pins #1 and #2. This energizes an internal relay
on the control board which allows 24VAC to the drain valve from
control board connector K2 pin #10.
41
Fig. 10
CONTROL
ICE
DISPENSE MODE
OFF
PORTION
DRAIN
CONTINUOUS
Fig. 11
4A1038-014