Service Manual

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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 (X10, Comp, HGV,
FMRenergize), Continue to step 5a. If FS is open, WV remains energized through
additional 1-min. ll cycles until water enters the water tank and 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 lters 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 lls, 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,
FMR, HGV, and X10 relay energize. CBmonitors the warming of the evaporator via the
thermistor located on the suction line. When the thermistor reaches 48°F (9°C), CB
reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer
(S4 dip switch 1 & 2). The harvest timer has settings of 60, 90, 120, and 180 sec. The
pump-out timer (S4 dip switch 3 & 4) acts in place of the harvest timer during cycles
with a pump-out (S4 dip switch 5 & 6). WV and X11 relay are energized during harvest
for a maximum of 6 min. or the length of harvest minus 50sec., whichever is shorter.
50sec. before harvest terminates, PM energizes. See step 5b below.
a) Comp Diagnosis: Check that evaporator is warming. Ifnot, conrm 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 (BR or BK) to neutral (W).
If115VAC is present at #7 or #10 (BR or BK) and not at #1 or #9 (V), replace CB.
If115VAC is present, check for 115VAC at CR solenoid. If 115VAC is present, conrm
contacts are closed. If not, replace CR. If CR 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: Conrm that LLV is de-energized and closed (not bypassing).
Ifenergized, replace CB. If de-energized and bypassing, replace LLV.
d) WRV Diagnosis: Conrm WRV is not leaking by.