Hoshizaki KM-901MAJ Service Manual page 24

2) Freeze-Time Correction Sequence:
First occurrence within 36 hr., minimum and maximum freeze times have exceeded
differential parameters. CB "POWER OK" LED starts blinking. Freeze-Time Correction
Cycle starts.
Second occurrence within 36 hr., minimum and maximum freeze times have exceeded
differential parameters. If not reset, CB "POWER OK" LED continues blinking. If reset
from first occurrence, CB "POWER OK" LED starts blinking. Freeze-Time Correction
Cycle starts.
Third occurrence within 36 hr. minimum and maximum freeze times have exceeded
differential parameters. CB yellow "EXT HARVEST" LED starts blinking. Also, If not
reset, CB "POWER OK" LED continues blinking. If reset, CB "POWER OK" LED starts
blinking. Freeze-Time Correction Cycle starts.
Total freeze-time correction cycle last for 90 min. At the end of 80 min., the final step
initiates and final Harvest Pump Time (Harvest Assist) with WV (10-min.) starts. Once
the final Harvest Pump Time (Harvest Assist) with WV (10-min.) terminates
(90 min. complete), normal freeze cycle begins.
2a) 10-Min. Harvest Pump Time (Harvest Assist) with WV: CB "POWER OK" LED
blinking. CB LEDs 1, 4, 3, and 2 are on and Comp, FMR, HGV, PM, and WV energize.
10-min. timer starts. Once 10-min. timer terminates, CB LEDs 1, 3, and 2 turn off and
Comp, FMR, HGV, and PM de-energize. WV continues.
2b) 10-Min. Fill: CB LED 4 on and WV energized. 10-min. timer starts.
2c) Final 10-Min. Harvest Pump Time (Harvest Assist) with WV: CB "POWER OK" LED
blinking. Once 10-min. timer terminates, CB LEDs 1, 4, 3, and 2 are on and Comp,
FMR, HGV, and PM energizes. WV continues. 10-min. timer starts. Once 10-min.
timer terminates, normal freeze cycle begins. CB LED 1 on and Comp, FMR, and PM
continue. HGV and WV de-energize.
Note: After 3rd Freeze-Time Correction Cycle in 36 hours, CB signals with blinking CB
yellow "EXT HARVEST" LED. Appliance continues normal operation.
CB "POWER OK" LED and CB yellow "EXT HARVEST" LED continue blinking in
normal operation sequence.
3) Appliance Cycle Reset and CB Alarm Reset:
Cycle Reset: Power supply or control switch turned off and on again: Appliance turns
off, then re-starts at 1. Fill Cycle.
Alarm Reset: CB "ALARM RESET" pressed during or after a freeze-time correction
cycle with power supply on: Appliance continues cycle with no interruption or reset.
CB red "POWER OK" LED blinking: CB red "POWER OK" LED resets to solid.
CB yellow "EXT HARVEST" LED blinking: CB yellow "EXT HARVEST: LED turns off.
Legend: BC–bin control; CB–control board; Comp–compressor; CR–compressor relay;
CT–control transformer; CV–check valve; FM–fan motor; FMR–fan motor remote;
FS–float switch; HGV–hot gas valve; HM–headmaster (C.P.R.); HPS–high-pressure
switch; LLV–liquid line valve; PM–pump motor; TXV–thermostatic expansion valve;
WRV–water regulating valve; WV–inlet water valve
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