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a) Freeze Cycle Diagnosis: Confirm Comp, FMR, and PM continue. Confirm that
FM and LLVs energize. Next, confirm HGVs, X10 relay 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 and FM energizes, TXV and
HM operate correctly, Comp is efficient, and refrigerant charge is correct. See "VIII.A.
Specification and Performance Data Sheets."
b) Comp, FM*, and FMR Diagnosis: If Comp and FMR 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 #1 (V) or #9 (V) to neutral (W).
If 115VAC is not present and LED 1 is on, replace CB.
Comp: 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."
FM*: If Comp is energized but FM* is not, check capacitor, motor windings, and fan
blade for binding.
FMR: If Comp is energized but FMR is 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 FMR capacitors, motor windings, and fan blade for
binding.
c) WV and HGVs Diagnosis: If WV is energized, check for 115VAC at CB K1 #6 (O)
to neutral (W). If 115VAC is present after PM energizes in harvest cycle, replace CB.
If 115VAC is not present, replace WV (bypassing). If HGVs (KMS and SRK) did not
de-energize at the end of harvest, check for 115VAC at CB K1 #2 (P) to neutral (W).
If 115VAC is present and LED 3 is off, replace CB. If 115VAC is not present, replace
HGV(s) (bypassing).
d) PM Diagnosis: Confirm water is flowing over evaporator from PM and not WV.
If PM de-energizes once freeze begins (except for slush control), check for 115VAC
at CB K1 #4 (R) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is
present and PM is de-energized, check for 115VAC at control switch #5 (R) to neutral
(W). If 115VAC is present at CB K1 #4 (R) and not at control switch #5 (R), check
control switch continuity between #5 (R) and #4 (R). Replace as needed. If 115VAC
is present at control switch #5 (R) to neutral (W), check PM capacitor and motor
winding continuity.
e) LLVs Diagnosis: If LLVs does not energize, check for 115VAC at CB K1 #3 (BK) to
neutral (W). If 115VAC is not present, replace CB. If 115VAC is present, check coil
voltage and continuity.
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