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5)
Freeze Cycle
– LED 1 is on.
Compressor remains energized, pump motor, and fan
motor energize. The inlet water valve and hot gas valve de-energize. The unit is held
in freeze by a 5 minute short cycle protection timer. After the 5 minute short cycle
protection timer terminates, the freeze cycle operation is transferred to the float switch
for freeze termination. During the first 5 minutes of freeze, confirm that the evaporator
temperature drops. After 5 minutes in freeze, remove the black float switch lead from
the K5 connector. The unit should switch out of the freeze cycle.
Diagnosis:
If the
evaporator is not cold, check to see if the hot gas valve is still open or if the expansion
valve is not opening properly, if the inlet water valve is continuing to fill the reservoir, if
there are improper unit pressures, or an inoperative compressor. If the unit remains in
freeze with the float switch removed, replace the board.
Note: Normal freeze cycle will last 20 to 40 minutes depending on model and
conditions. Cycle times and pressures should follow performance data provided
in this manual.
6)
Pump-Out Cycle (10/20 second pump out)
– LEDs 1, 4, 3, 2 are on.
The 1st pump
out occurs after the 1st freeze cycle and every 10th cycle thereafter. The pump-out
cycle (S4 dip switch 5 & 6) can be adjusted to occur every cycle, or every 2, 5, or
10 cycles.
The compressor remains energized, the hot gas valve energizes, the fan motor
de-energizes, the pump motor stops for 2 seconds, then starts in reverse rotation for
10 seconds. This removes contaminants from the water reservoir.
Diagnosis:
If the
pump motor does not reverse, check the circuit and pump capacitor. If water does not
pump out, check for clear tubing at the check valve housing and check the unit drain
for water flow. Remove the pump out check valve housing and check/clean the valve
assembly.
7)
Normal Harvest Cycle – Same as the initial harvest cycle –
Return to step 4.
Note: Unit continues to cycle until bin control is satisfied or power is turned off. The unit
always restarts at the 1 minute fill cycle.
