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4) 1-Min. Fill Cycle – LED 4 is on. WV and X11 relay energize. After 1 min., CB checks
for a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins
(Comp, HGV, and FM energized), continue to step 5a. If FS is open, WV remains
energized until FS closes (low water safety protection during initial start up and at
the end of each harvest). Diagnosis: Check that water enters the water tank. If not,
check that the water supply line shut-off valve is open and screens or external filters
are clear. Check for 115VAC at CB K1 #6 (O) to neutral (W). If 115VAC is not present,
replace CB. If 115VAC is present, and WV does not energize, check for 115VAC at WV.
If 115VAC is present, check coil continuity. If open, replace WV. If the water tank fills,
but the appliance fails to start harvest (Comp energized), check for open FS. See "II.E.
Float Switch Check and Cleaning." If FS is closed and CB fails to start the harvest cycle
after 1 min., replace CB.
5a) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV and X11 relay continue. Comp,
FM, HGV, and X10 relay energize. CB monitors the warming of the evaporator via the
thermistor located on the suction line. When the thermistor reaches 9°C, CB reads
3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4
dip switch 1 & 2 and S5 dip switch 4). WV and X11 relay are energized during harvest
for a maximum of 6 min. or the length of harvest minus HPT setting (S4 dip switch 6),
whichever is shorter. See step 5b below.
a) Comp Diagnosis: Check that evaporator is warming. If not, confirm that Comp
energizes. If not, check for 115VAC at CB K1 #1 or #9 (V) to neutral (W). If 115VAC
is not present, check for 115VAC at CB K1 #7 or #10 (LBU) to neutral (W). If 115VAC
is present at #7 or #10 (LBU) and not at #1 or #9 (V), replace CB. If 115VAC is
present, check for 115VAC at CR or MC solenoid. If 115VAC is present, confirm
contacts are closed. If not, replace CR or MC. If CR or MC contacts are closed,
check Comp external overload, Comp start and run capacitors, Comp start relay,
and Comp motor winding.
b) HGV Diagnosis: If Comp is energized and evaporator is not warming, check that
HGV energizes and opens. Check for 115VAC at CB K1 #2 (P) to neutral (W).
If 115VAC is not present, replace CB. If 115VAC is present, check for 115VAC at
HGV coil and check HGV coil continuity. Replace as needed.
c) LLV Diagnosis: Confirm that LLV is de-energized and closed (not bypassing).
If energized, replace CB. If de-energized and bypassing, replace LLV.
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