Hoshizaki SRH/3 KM-1900SAH/3, SRH/3 KM-2100SWH3, KM-1301SAH/3 A. Sequence of Operation Flow Chart

"E" and "G" Control Board without Harvest Pump Timer Operation Flow Chart

Cycle

1. 1-Minute

2. Harvest Cycle

3. Freeze Cycle

4. Pump-Out Cycle

Steps

Fill Cycle

• Max. WV time: 6 min.

• Min. freeze time: 5 min.

• Factory set for every

• Max. harvest time: 20 min.

• Max. freeze time: freeze timer

10th cycle

setting

(S4 dip switch 5 & 6)

(S4 dip switch 9 & 10)

• Pump motor stops for

Thermistor

1 to 3-min. harvest

5-min. timer in

2 sec., then reverses

in control

timer in control

control

FS in control

for 10/20 sec. (S4 dip

switch 3 & 4)

Startup

(S4 dip switch 1 & 2)

FS check

FS closed

FS check

FS closed

FS opens or

Comp continues

WV energized

Comp energized

Thermistor temperature

Comp continues

freeze timer

FMR energized

reaches 48°F (9°C)

FMR continues

terminates

FMR continues

FS open

HGV energized

(3.9 kΩ or less). Harvest

FM energized

HGV energized

timer starts (1 to 3 min.).

PM de-energizes for 2 sec.,

WV energized

LLV energized

FS open

then reverses for 10/20 sec.

PM energized

If FS is open, Comp stops and cycle returns to 1-min. fill.

HGV de-energized

FM de-energized

LLV de-energized

WV de-energized

17

Shutdown

1. Bin Full

2. Icemaker Off

3. Ice Level Lowered

and Restart

Within 10 sec. after ice contacts BC bulb,

All components

No ice touching BC bulb.

icemaker shuts down.

de-energized.

Icemaker starts at

"1. 1-Minute Fill Cycle."

BC

To 1. 1-Minute Fill Cycle

Operation

BC open

BC closed

Ice contacts BC bulb

All components

NOTE: "G" control board green "BC CLOSED" LED

de-energized

Legend:

on continuously when the K4 jumper is in place.

BC–bin control

Comp–compressor

Components Energized when the Control Switch is in the "WASH" Position

FM–fan motor

The "WASH" position on the control switch is used when cleaning and sanitizing the icemaker. When in the "WASH"

FMR–fan motor-remote

position, power is supplied to the pump motor. With the cleaning valve closed, the cleaner and sanitizer flow over the

FS–float switch

outside of the evaporator plate assembly. With the cleaning valve open, the cleaner and sanitizer flow over both the

HGV–hot gas valve

outside and the inside of the evaporator plate assembly.

LLV–liquid line valve

Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the icemaker will not restart

PM–pump motor

when the control switch is placed in the "ICE" position.

WV–inlet water valve

.1 "E" and "G" Control Board without Harvest Pump Timer	A. Sequence of Operation Flow Chart	II. Sequence of Operation and Service Diagnosis
Operation