Service Manual

10
F/S open
F/S check
• Minimum freeze time: 5 min. • Maximum freeze time: freeze timer setting (S4 dip switch 9 & 10)
Components Energized when the Control Switch is in the "SERVICE" Position When in the "SERVICE" position, the control switch supplies power to the service switch and the icemaker is in service mode. The service switch has three positions: "DRAIN," "CIRC." and "WASH." See the information below for details of each function.
DRAIN
Power is supplied to the pump motor and drain valve. This drains the water tank.
CIRC.
Power is supplied to the pump motor only. This operation can be used to circulate cleaner and sanitizer over the outside surface of the evaporator for extended periods of time.
WASH
Power is supplied to the pump motor and wash valve. This operation is used to circulate cleaner and sanitizer over both the inside and outside surfaces of the evaporator.
4. Pump-Out Cycle
1. 1-Minute Fill Cycle
2. Harvest Cycle
3. Freeze Cycle
Cycle Steps
WV energized
F/S closed
WV continues Comp energized FMRs energized HGVs energized
Thermistor temperature reaches 48°F (9°C) (3.9 kΩ or less) Harvest timer starts.
F/S open
Comp continues FMRs continue PM continues LLVs energized HGVs de-energized
Comp continues FMRs continue HGVs energized DV energized PM de-energizes for 2 sec., then energized for 10/20 sec. LLVs de-energized
F/S check
• WV time: 6 min. or the length of harvest minus
HPT settings (S4 dip switch 6), whichever is shorter.
• Maximum harvest time: 20 min.
Thermistor in control
1 to 3-min. timer in control (S4 dip switch 1 & 2)
Startup begins here after 5-sec. delay
If F/S is open, Comp and FMRs de-energize and cycle returns to 1-minute ll cycle
• Factory set forevery
10th cycle.
(S4 dip switch 5) • Pump motor stops for
2 sec., then energized
for 10/20 sec. (S4 dip switch 3 & 4)
PM energized WV de-energized
HarvestPump Timer
Legend: BC-bin control Comp-compressor DV-drain valve FMRs-fan motors-remote F/S-oat switch HGVs-hot gas valves (KMS and SRK) LLVs-liquid line valves (KMS and SRK) PM-pump motor WV-inlet water valve
Operation Flow Chart
Anti-Slush Thermistor temperature drops to 36°F (2.2°C) (5.8 kΩ or more). PM de-energizes for 10 sec.
50 sec.
FS in control
FS closed
5-min. minimum freeze timer in control
FS opens or freeze timer terminates
When freeze time differential exceeded, freeze-time correction cycle starts. See "II.A.3. Freeze-Time Correction Chart."
II. Sequence of Operation and Service Diagnosis
A. Sequence of Operation Flow Chart
1. Operation Flow Chart