icetro IM Series, Installation, Service & Operation Manual, Page: 25 / 50

IM MODULAR SEQUENCE OF OPERATION
INITIAL START-UP IM SERIES
1. Turn on water and allow water sump to fill until water level sensor detects high level.
2. Move the Ice-Off- Clean switch to the “ICE” position.
3. Dump valve and the pump motor operate to discard the remain sump water for 20 seconds after detecting the low water low
level sensor detection.
4. Water valve open and supply water into sump until water level sensor reaches high level. 5 seconds later HOT GAS Valve open
10 seconds and wait until water level sensor reaches high level. (Minimum requirement time is 20 seconds and pressure equal
ization step for reduce compressor starting torque)
5. The pump motor will operate after 15 seconds after the compressor and fan motors are in operation, so that the evaporator is
pre-chilled through the compressor to keep the ice in good condition.
6. Water supply valve is open and supply water when water level sensor reaches low level. And stopped until water level sensor
reaches high level plus set time.(At 1
st
cycle only. From the second cycle, even if the low water level is detected, no additional
water supplied )
7. *Hot Gas Solenoid is De-energized while Compressor and Condenser Fan continue to pre-chill the evaporator for 15 seconds.
8. With Compressor and Fan running, Water Pump is energized and water circulates over evaporator for approx. 10 minutes.
9. When water contacts the Ice Thickness Probe for 7 continuous seconds, machine enter defrost cycle.( Harvest )
10. With Compressor running, Hot Gas Valve is energized for 50 seconds.
11. Water Pump and Dump valve are De-energized while Hot Gas Valve and Compressor continue for approximate 2 minutes.
12. *Defrost is terminated when ice drops from the evaporator and causes Curtain Switch to open and close.
13.
If Bin level is sufficiently high that ice is trapped between Curtain and Evaporator, Machine stops operation and “Full Lamp” on
front of machine is lit.