15
b)
HPS Diagnosis:
Check that the condenser coil is not clogged or restricted.
Let refrigeration circuit pressures equalize. If HPS does not reset and pressures
are equalized, replace HPS. If pressures are not equalized, reclaim refrigerant and
diagnose refrigeration circuit restriction. Check that there are no restrictions in the
refrigeration circuit.
Harvest Cycle: HGV, strainer, or check valve.
Freeze Cycle: FM, TXV, WRV, strainer, and drier.
Confirm that the location meets installation requirements:
• The appliance is not intended for outdoor use. Normal operating ambient temperature
should be within 45°F to 100°F (7°C to 38°C).
• Allow 2" (5 cm) clearance on the right side and 5/8" (15 mm) clearance at the top
for proper air circulation and ease of maintenance and/or service should they be
required.
• The appliance should not be located in a corrosive environment.
4)
1-Min. Fill Cycle – LED 8 is on.
WV energizes. After 1 min., CB checks for a closed
FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGV,
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 K5 #4 (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 5, 6, and 8 are on.
WV continues. Comp and HGV
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 (S1 dip switch 1 & 2
and S2 dip switch 4). WV is energized during harvest for a maximum of 6 min. or the
length of harvest minus HPT setting (S1 dip switch 7 & 8), 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 K3 #2 (V) to neutral (W). If 115VAC is not
present, check for 115VAC at CB K3 #1 (P) to neutral (W). If 115VAC is present at
#1 (P) and not at #2 (V), replace CB. If 115VAC is present, check for 115VAC at CR
solenoid. If 115VAC is present, confirm contacts are closed. If not, replace CR.
If CR contacts are closed, check Comp external overload, Comp start capacitor,
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 K5 #2 (V) to neutral (W).
If 115VAC is not present and LED 6 is on, replace CB. If 115VAC is present, check for
115VAC at HGV coil and check HGV coil continuity. Replace as needed.
Summary of Contents for KM-301BAJ
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