d) Drain Cycle
(1)1-in-1 Drain Cycle: DV energizes for 2 seconds once every hour when the
1-in‑1 drain cycle is activated (S1 dip switch 4 in the off position (factory default position)). 1-hour drain cycle timer terminates, 2-second DT starts. DV energizes for
2 seconds. 2-second DT terminates, 1-hour DT resets. All components and icemaking continue. 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.
(2)1-in-12 Drain Cycle (optional): DV energizes for ten minutes 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, CR (X1 on CB) and PDS de‑energize, GMR (X2 on CB), GM, GMPR, and EH continue. Unit is in pump-down mode. Once the low-side pressure drops to 9 PSIG, CLPS opens, de-energizing MC, Comp, and FMR. 5-minute ice purge timer begins. When the 5‑minute ice purge timer terminates, GMR (X2 on CB), GM, GMPR, and EH de‑energize. 10-minute DT begins, DV energizes. After 10-minute DT terminates, 12 hour drain cycle timer starts.
(3)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-second delay, then CR (X1 on CB) and
PDS de‑energize. Unit is in pump-down mode. Once the low-side pressure drops to 9 PSIG, CLPS opens, de-energizing MC, Comp, and FMR. 5-minute ice purge timer begins. When the 5-minute ice purge timer terminates, GMR (X2 on CB), GM, and GMPR de-energize. DV energizes to drain the evaporator and reservoir. To avoid the 5-minute shutdown delay, turn off the icemaker power supply, then move the control switch to the "DRAIN" position. DV de‑energizes when the control switch is moved to the "ICE" position.
