49
10)
Defrost–Freezer (auxiliary code P-6 and later) and RFH1-SSB-HD Freezer
A.
Defrost Initiation
1a)
Freezer (auxiliary code P-6 and later)–LEDs 1 (DH, DrH, DctH, and CordH)
and 3 (EvapFM off) are on:
DT terminates or manual defrost initiated. DH, DrH,
DctH, and CordH energize. "dEF" displayed on DB. If energized, Comp, ConFM,
and EvapFM de-energize.
1b)
RFH1-SSB-HD Freezer–LEDs 1 (DH), 3 (EvapFM off), and 5 (CPH and DrH
(auxiliary code Q-5 and later)) are on:
DT terminates or manual defrost initiated.
CPH and DrH (auxiliary code Q-5 and later) continue. DH energizes. "dEF"
displayed on DB. If energized, Comp, ConFM, and EvapFM de-energize.
Note: Some models may utilize any combination of the following heaters during defrost:
Duct Heater, Cord Heater, or Drain Heater. See "VII.Wiring Diagrams" for specific
model details.
a)
Checkout:
Has DT terminated?
Is "dEF" displayed on DB? Check that DH
energizes and Comp, ConFM, and EvapFM de-energize.
b)
DH Diagnosis:
Check for 115VAC at CB K1 connector pin #6 (O wire) to a neutral
(W wire). If 115VAC is not present, confirm that the appliance is not in the 5-minute
defrost recovery period. Wait 5 minutes, then check CB K1 connector pin #6
(O wire) to a neutral (W wire) again. If 115VAC is not present, and Comp is not
energized, replace CB. If 115VAC is present, confirm DH amperage. If amperage
is not present, check defrost thermostat and DH continuity. If amperage is present,
confirm that evaporator warms to 100
°
F (38
°
C) at DTh location. Next, check
DTh status. See "III.C. Thermistor Check." When DTh reaches 100
°
F (38
°
C), DH
de-energizes. If DH remains energized past 100
°
F (38
°
C), replace CB.
c)
Comp Diagnosis:
If Comp does not de-energize, check for 115VAC at CB
K1 connector pin #10 (GY wire) to a neutral (W wire). If 115VAC is present, replace
CB. If 115VAC is not present, check continuity of Comp relay contacts. If closed,
replace Comp relay.
d1)
ConFM Diagnosis: Freezer (auxiliary code P-6 and later):
If ConFM does not
de-energize, check for 115VAC at CB K9 connector pin #2 (BR wire) to a neutral
(W wire). If 115VAC is present, replace CB.
d2)
ConFM Diagnosis:
RFH1-SSB-HD Freezer:
If ConFM does not de-energize,
check for 115VAC at CB K1 connector pin #10 (GY wire) to a neutral (W wire). If
115VAC is present, replace CB. If 115VAC is not present, check continuity of Comp
relay contacts. If closed, replace Comp relay.
f)
EvapFM Diagnosis:
If EvapFM does not de-energize, check for 115VAC at
CB K1 connector pin #3 (DBU wire) to a neutral (W wire). If 115VAC is present,
replace CB.
