Service Manual

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4) 1-Min. Fill Cycle – LED 4 is on. WV1 energizes. After 1 min., CB checks for a closed
FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGVs,
and FMRs energized), continue to step 5a. If FS is open, WV1 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 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 WV1 does not energize, check for 115VAC at X10 relay terminal #6 (O)
to neutral (W) and X10 relay terminal #2 (W/O) to neutral (W). If 115VAC is present on
relay terminal #6 (O) and not on relay terminal #2 (W/O), check for 115VAC on
X10 relay terminal #8 (P) to neutral (W), if 115VAC is present replace CB. If 115VAC is
not present replace X10 relay. If 115VAC is present, and WV1 does not energize, check
for 115VAC at WV1. If 115VAC is present, check WV1 coil continuity. If open, replace
WV1. If the water tank lls, but the appliance fails to start harvest (Comp energized),
check for open FS. See "II.F. 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. WV1 continues. Comp, FMRs,
HGVs, WV2, X10 relay, X12 relay, and X13 relay energize. WV1 de-energizes. 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 and S5 dip
switch 4). WV2 and X12 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. X13 remains energized throughout harvest cycle to prevent DV
from energizing.
a) Comp Diagnosis: Check that evaporator is warming. If not, conrm that Comp
energizes. If not, check for 115VAC at CB K1 #1 (V) to neutral (W). If 115VAC is not
present, check for 115VAC at CB K1 #10 (BR) to neutral (W). If 115VAC is present
at #10 (BR) and not at #1 (V), replace CB. If 115VAC is present, check for 115VAC
at MC solenoid (SRK). If 115VAC not present, check wire harness connections.
If 115VAC is present, conrm contacts are closed. If not, replace MC. If MC contacts
are closed, check Comp start and run capacitors, start relay (single phase), and
Comp motor winding.
b) HGVs Diagnosis: If Comp is energized and evaporator is not warming, check that
HGVs energize and open. 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
HGVs coil (KMS and SRK) and check HGVs coils continuity. Replace as needed.
c) LLVs Diagnosis: Conrm that both LLVs are de-energized (KMS and SRK) and
closed (not bypassing). If energized, replace CB. If de-energized and bypassing,
replace LLVs (KMS and SRK).