KM-650MAH-E Service manual - Hoshizaki

(4) Pump-Out Cycle
LEDs 1, 3, and 2 are on. Comp remains energized. HGV energizes. WV energizes if
S4 dip switch 3 off and 4 on (LED 4 on). LLV (KM-515MAH-E) and FM de‐energize.
PM stops for 2 seconds then reverses for 10 or 20 seconds (S4 dip switch 3 & 4).
Water is removed from the bottom of the water tank through the check valve and
down the drain. At the same time, water flows through the small F/S tube to power
flush F/S. When the pump-out timer terminates, pump-out is complete.
The 1st pump‐out occurs after the 1st freeze cycle, then every 10th cycle
thereafter (KM-320MAH-E) or every cycle thereafter (KM-515MAH-E and
KM‐650MAH-E). The pump-out frequency control is factory set, and generally no
adjustment is required. However, the pump-out frequency control (S4 dip switch 5 &
6) can be set to have a pump-out occur every cycle, or every 2, 5, or 10 cycles. For
details, see "II.C.3.d) Pump‐Out Frequency Control (S4 dip switch 5 & 6)."
(5) Harvest Cycle
LEDs 1, 4, and 2 are on. Same as the initial harvest cycle. See "II.B.1.a)(2) Initial
Harvest Cycle."
Note: Icemaker continues to cycle until TBC is satisfied or power is turned off. The
icemaker always restarts at the 1-minute fill cycle.
(6) Shutdown
When ice contacts the thermostatic bulb (TBC switch open), TBC shuts down the
icemaker within 10 seconds. TBC is factory set, and generally no adjustment is
required. However, adjustment may be needed in some conditions, particularly at
higher altitude locations. NOTICE! Do not adjust S4 dip switch 7 out of the factory
default position. This dip switch must be left in the factory default position or
this icemaker will not operate correctly.
Legend: CB–control board; Comp–compressor; FM–fan motor; F/S–float switch; HGV–hot
gas valve; LLV–liquid line valve (KM-515MAH-E); PM–pump motor;
TBC–thermostatic bin control; WV–inlet water valve
14