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5c)
Initial Harvest Cycle Termination Diagnosis
: 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). Check discharge line
temperature. For a thermistor check, see "II.G. Thermistor Check." If 1-min. fill cycle
starts after harvest timer terminates, check that FS is clean and operating properly, see
"II.F. Float Switch Check and Cleaning." If FS is closed, CB proceeds to the next cycle.
If not, replace CB.
Note: The minimum total time allowed by CB for a complete harvest cycle is based on
S5 dip switch 4. Maximum harvest time allowed is 20 min.
NOTICE!
S4 dip switch 7 must remain on. Otherwise, PM will not energize during
the last seconds of harvest.
6)
Freeze Cycle – LED 1 is on.
Comp, FMRs, and PM continue. LLVs energize.
HGVs, X10 and X12 relays de-energize. Appliance is held in freeze by a 5-min. short
cycle protection timer. After 5-min. short cycle protection timer terminates and FS opens,
freeze cycle terminates.
Note: PM power supply switches from CB K1 #5 (DBU) in HPT to K1 #4 (R) in freeze.
Anti-Slush
: When anti-slush is enabled (S5 dip switch 5 "ON"), PM de-energizes when
thermistor reaches 36°F (2.2°C) (5.8 kΩ) for 10 sec. then, energizes for the remainder
of the freeze cycle.
a)
Freeze Cycle Diagnosis
: Confirm Comp, FMRs, and PM continue. Confirm that
LLVs energize. Next, confirm HGVs, X10 and X12 relays de-energize. During the
first 5 min. of freeze, confirm evaporator is cooling. If not, confirm WV de-energized
(not leaking by), HGVs de-energized (not bypassing), LLVs energizes, TXV and HM
operate correctly, Comp is efficient, and refrigerant charge is correct.
See "VIII.A. Specification and Performance Data Sheets."
b)
Comp and FMRs Diagnosis
: If Comp and FMRs de-energize once freeze begins,
check that appliance has not shut off on HPS or DLT ("POWER OK" LED off).
If so, check "3)b) HPS Diagnosis" or "3)c) DLT Diagnosis" above. If CB "POWER
OK" LED is on (KMS), check for 115VAC at CB K1 #9 (V) to neutral (W). If 115VAC
is not present and LED 1 is on, replace CB. If 115VAC is present, check for 115VAC
at MC coil (SRK). If 115VAC is not present, check wire harness connections. Next,
check for 115VAC at MC coil. If 115VAC is present, check MC coil and contacts
continuity. Replace as needed. If MC is okay, check Comp start relay and start and
run capacitors (single phase). Next, check Comp motor winding continuity. If Comp is
energized but evaporator is not cooling, check for an inefficient Comp.
See "VIII.A. Specification and Performance Data Sheets."
FMRs Diagnosis:
If Comp is energized but FMRs are not, check for 115VAC at
MC terminal "NO" black (BK) wire to neutral (W). If 115VAC is not present, and
MC is energized replace MC. If 115VAC is present, check FMRs capacitors, motor
windings, and fan blades for binding.
