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4) Initial Freeze Cycle. Comp and 102-sec. WVT (WV continues another 52sec.in
freeze cycle) continue. FM and PM energize. HGV de-energizes. When 102-sec.
WVT terminates, WVde-energizes. CB monitors the cooling of the evaporator via the
thermistor located on the evaporator for freeze termination. When the thermistor drops
to 27°F (-3°C), CB reads 6.8 kΩ from the thermistor and starts 3-min. FT. 27°F (-3°C)
or lower must be maintained the entire 3min. If reading rises above 27°F(-3°C) before
3-min. FT terminates, 3-min. FT resets. When 27°F(-3°C) or lower is maintained for 3
min., 5-min. FTT starts.
a) Comp Diagnosis: If Comp de-energizes, check PTC relay continuity. If open,
replace PTC. If closed, check Comp external protector and motor winding continuity.
Replace as needed. If Comp is energized but evaporator is not cooling, check for an
inefficient Comp. See "VIII.B. Performance Data."
b) FM and PM Diagnosis: If FM and PM do not energize, check for 115VAC at CB
B1(P) to neutral (W) and CB A1 (LBU) to neutral (W). If115VAC is present at CB
B1(P) to neutral (W) and not at CB A1 (LBU) to neutral (W), replace CB. If115VAC is
present at CB A1 (LBU) to neutral (W), check FM or PM motor winding continuity, fan
blade or PM impeller for binding, and PM capacitor.
c) HGV and WV Diagnosis: Conrm HGV and WV de-energize. If HGV is energized,
check for 115VAC at CB B1 (P) to neutral(W). If 115VAC is present after PM
energizes, replace CB. If 115VAC is not present and HGV is bypassing, replace HGV.
If WV does not de-energize 52 sec. after freeze cycle starts, check for 115VAC at
CB A2 (V) to neutral (W). If 115VAC is present 52 sec. or later after PM energizes,
replace CB. If115VAC is not present and WV is leaking by, replace WV.
d) Initial Freeze Cycle Termination Diagnosis: 5-min. FTT terminates, harvest cycle
starts. Ifnot, check evaporator temperature where thermistor is mounted and check
the thermistor. See "II.E. Thermistor Check." If evaporator temperature is below
27°F(-3°C) for more than 8min. and freeze does not terminate, replace CB.
5) Normal Harvest Cycle. Comp continues. HGV and WV energize. FMand PM
de-energize. 102-sec. WV timer starts. CB monitors the warming of the evaporator via
the thermistor located on the evaporator. When the thermistor reaches 47°F (7°C), CB
reads 4.5 kΩ from the thermistor and turns harvest termination over to the 50-sec. HT.
WV is energized during harvest for a maximum of 102 sec. or the length of harvest,
whichever is shorter.
Note: Appliance continues to cycle until BC is satised or power is turned off.
Theappliance always restarts at the initial harvest cycle.
a) Comp Diagnosis: Check that evaporator is warming. Ifnot, conrm Comp is
energized. If not, check for 115VAC at PTC and check PTC relay continuity. If open,
replace PTC. If closed, check Comp external protector and motor winding continuity.
Replace as needed.
b) HGV Diagnosis: If Comp is energized and evaporator is not warming, check that
HGV energizes and opens. If not, check for 115VAC at CB C1 (BK) to neutral (W)
and at CB B1 (P) to neutral (W). If 115VAC is present at CB C1 (BK) to neutral (W)
and not at CB B1 (P) to neutral (W), replace CB. If 115VAC is not present at CB
C1(BK) to neutral (W), check wiring connections from BC. If 115VAC is present,
check HGV coil continuity. Replace as needed.