Service Manual

12
II. Sequence of Operation and Service Diagnosis
A. Sequence of Operation Flow Chart
1. Operation Flow Chart
1-in-1 drain cycle. DV opens for 2 sec. every hour (CB S1 Dip Switch 4). Icemaker status does not change.
Operation Flow Chart
LFS closed UFS closed FZT starts FT terminated WV de-energized
3. 1-in-12 Drain Cycle
& Restart (optional)
UFS open LFS open (WV on) FT starts (90 sec.) FZT terminated WV energized Comp continues EH continues FMR continues GM continues PDS continues
1. Startup
2. Ice Purge Cycle
WV energized
Power Switch "ON" Control Switch in "ICE" POWER OK LED on BC Green LED on BC Yellow LED off
2. 1-in-1 Drain Cycle
Comp de-energized FMR de-energized PDS de-energized GM continues
1. Fill Cycle
3. Freeze Cycle
LFS closed UFS closed FZT starts (30 min.) FT terminated WV de-energized Comp continues EH continues FMR continues GM continues PDS continues
Low Water Safety Purge Timer
UFS open WV energized PDS de-energized (CLPS opens) Comp de-energized FMR de-energized GM continues
DV energized GM de-energized
10-min. DT terminated DV de-energized 1-in-12 DT reset
5 min.
4. Icemaker Restart
2. Ice Purge Cycle
3. 10-Min. Drain
If Fill > 90 sec. FT 1-beep alarm sounds WV continues When UFS closes alarm resets and 2. Ice Purge Cycle starts.
FT Maximum 90 sec.
4. 1-in-12 Drain Cycle - Although the factory default 1-in-1 drain cycle
is recommended, a 1-in-12 drain cycle is available. For 1-in-12 drain cycle sequence, see "3. 1-in-12 Hour Drain Cycle & Restart (optional)."
Rell
FT Maximum 90 sec.
90 sec. FT exceeded, 90 sec. PT starts and 1-beep alarm sounds
90. sec. PT terminates unit shuts down and 1-beep alarm continues. When UFS closes, alarm resets and 2. Ice Purge Cycle starts.
WV continues GM de-energized
1. DT Initiates DC
To bypass, press the "SERVICE" button after GM starts.
5 min.
to "1. Fill Cycle" above
90 sec.
(CB S1 dip switch 4 "ON")
FT off (90 sec.)
5 or 30 sec. (S1 Dip Switch 7)
EH energized GM energized
1. DT Initiates DC Continued uninterrupted operation
DV energizes for 2 sec.
2. Continued Operation
DV de-energizes, no interruption in ice production
30-min. FZT
Startup
FZT exceeded (LFS does not open): CB shuts down icemaker and sounds a 5-beep alarm.
Legend: BC-bin control (infrared sensor) CB-control board CCH-crankcase heater CLPS-control low-pressure switch Comp-compressor DC-drain cycle DT-drain timer DV-drain valve EH-evaporator heater
FMR-fan motor-remote FT-ll timer (low water safety) FZT-freeze timer GM-gear motor LFS-lower oat switch PDS-pump-down solenoid valve PT-purge timer UFS-upper oat switch WV-inlet water valve
Low Water Safety Shutdown
(CB S1 dip switch 4 "OFF")
Normal Operation
PDS energized CLPS closed Comp energized FMR energized EH continues GM continues
Note: CCH energizes when power is supplied to SRC. CCH de-energizes when Comp is energized. See "VII.B.3. SRC-10J Condensing Unit."