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3a)
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 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, confi rm that Comp
energizes. If not, check for 115VAC at CB K1 #1 (V) or #9 (V) to neutral (W).
If 115VAC is not present, check for 115VAC at CB K1 #7 (LBU) or #10 (LBU) to
neutral (W). If 115VAC is present at #7 (LBU) or #10 (LBU) and not at #1 (V) or
#9 (V), replace CB. If 115VAC is present, check for 115VAC at CR solenoid. If
115VAC is present, confi rm contacts are closed. If not, replace CR. If CR contacts
are closed, check 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 and LED 2 is on, replace CB. If 115VAC is present, check
for 115VAC at HGV coil and check HGV coil continuity. Replace as needed.
c)
LLV Diagnosis:
Confi rm that LLV is de-energized and closed (not bypassing).
If energized, replace CB. If de-energized and bypassing, replace LLV.
3b)
Harvest Pump Time (Harvest Assist) – LEDs 1, 3, and 2 are on.
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).
When WV de-energizes, LED 4 turns off , X11 relay de-energizes and LED 3 turns on.
PM energizes. Comp, HGV, and X10 relay continue.
Diagnosis:
Place a thermometer on the suction line next to the thermistor. Has it
warmed to 48°F (9°C) or warmer? Confi rm thermistor status. See "II.F. Thermistor
Check." If the thermistor reading is in proper range, dip switch 7 is on, and PM does not
energize before harvest terminates, replace CB. If WV continues, check for 115VAC at
CB K1 #6 (O). If 115VAC is present, and LED 4 is off , replace CB. If LED 3 is on and
PM is not energized, check for 115VAC at CB K1 #5 (DBU). If 115VAC is not present,
replace CB. If 115VAC is present and PM is not energized, check for 115VAC at
X10 relay terminal #7 (Y) to neutral (W). If 115VAC is not present, check for 115VAC at
X10 relay terminal #3 (P) to neutral (W) and X10 relay terminal #5 (Y) to neutral (W).
If 115VAC is present on terminal #3 (P) and not on terminal #5 (Y), replace X10 relay.
If 115VAC is present on X10 relay terminal #7 (Y) and PM is not energized, check for
115VAC at X10 relay terminal #4 (R) to neutral (W) and terminal #6 (DBU) to neutral
(W). If 115VAC is present on terminal #6 (DBU) and not on terminal #4 (R), replace
X10 relay. If 115VAC is present on X10 relay terminal #4 (R), check control switch
contact continuity between terminals #4 (R) and #5 (R). If contacts are open, replace
control switch. If contacts are closed and 115VAC is present between control switch
terminal #5 (R) and neutral (W), check PM capacitor and motor winding continuity.