Hoshizaki SRC-14H Service Manual page 20

11) Drain Cycle
a) 1-in-1 Drain Cycle: DV energizes once every hour when the 1-in-1 drain cycle is
activated (S1 dip switch 4 in the "OFF" position (factory default position)).
GM and PDS continue. DV energizes for 2 sec. every hour. This setting is recommended
for optimum icemaker performance. The 1-in-1 drain cycle allows any sediment to drain
from the evaporator without interrupting the icemaking process.
b) 1-in-12 Drain Cycle (optional): DV energizes once every 12 hours when the 1-in-12
drain cycle is activated (S1 dip switch 4 in the on position (optional)). 12-hour drain
cycle timer terminates, PDS de-energizes, GM continues. The 5-min. ice purge timer
starts. When the 5-min. ice purge timer terminates, GM de-energizes. 10-min. DT starts,
DV energizes. After 10-min. DT terminates, DV de-energizes and 12-hour drain cycle
timer starts. Icemaking cycle starts.
c) Manual Drain: Manual drain is used when servicing evaporator components and
cleaning and sanitizing the unit. When the unit is making ice and the control switch is
moved to the "DRAIN" position, there is a 3-sec. delay, then PDS de-energizes and
the 5-min. ice purge timer starts. When the 5-min. ice purge timer terminates, GM
de-energizes. DV energizes to drain the evaporator and reservoir. To avoid the 5-min.
shutdown delay, turn off the power supply, then move the control switch to the "DRAIN"
position. Turn on the power supply. DV energizes to drain the evaporator and reservoir.
DV de-energizes when the control switch is moved to the "ICE" position
12) Shutdown – BC1 (infrared sensor): When ice activates BC1, yellow LED starts
flashing when ice is at the outer limit of its range and turns steady as ice nears. After
BC1 yellow LED turns on (flashing or steady), BC1 shutdown delay timer (S1 dip switch
1, 2, 3) starts. For a typical dispenser unit application, a 100-sec. shutdown delay is
recommended. When used with a standard Hoshizaki storage bin, any shutdown delay
setting is acceptable. See "III.B.2. BC1 (Infrared Sensor) Shutdown Delay (S1 dip
switch 1, 2, 3)." Once BC1 shutdown delay timer terminates, PDS de-energizes and the
5-min. ice purge timer starts. Unit is in pump-down mode. When the refrigerant low-side
pressure drops to 9 PSIG, CLPS opens, MC de-energizes, de-energizing Comp and
FMR. When the 5-min. ice purge timer terminates, GM, EH, CCR/GMPR de-energize.
Icemaker Diagnosis: BC1 yellow LED not flashing or on with ice near. See "II.D.1.
Bin Control 1 (infrared sensor) Check." PDS remains energized after BC1 shutdown
delay timer terminates. Check for 115VAC from CB X1 relay DBU wire to neutral (W).
If 115VAC is present, replace CB. If 115VAC is not present, check PDS for mechanical
failure.
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