17
(3)
Comp and ConFM Diagnosis
: Confirm Comp and ConFM de-energize.
If not, check for 115VAC at CM C1 (R or V) to neutral (W). If 115VAC is present,
replace CM. If 115VAC is not present and Comp and ConFM continue, check
CR #6 (R) to neutral (W). If 115VAC is present, replace CR.
(4)
EvapFM Diagnosis
: Confirm EvapFM de-energizes. If not, check for 115VAC at
CM F5 (Y or W/BU) to neutral (W). If 115VAC is present, replace CM.
2a)
Temperature/Time Initiated Defrost-Termination
: Has DTh warmed to 59°F
(15°C)? If not yet confirmed, confirm DTh status. See "II.D. Thermistor Check."
If DTh is in proper range, DH de-energizes and 3 delay timers start. If DTh has not
warmed to 59°F (15°C), check DT and DH continuity. Next, check DH amp draw.
(1)
3-min. Comp delay timer terminates
: 3 min. after DH de-energizes, confirm
defrost icon turns off, Comp icon turns on, and Comp and ConFM energize.
If not, confirm cabinet temperature is warm enough for Comp and ConFM
operation. Next, check for 115VAC at CM C1 (R or V) to neutral (W). If 115VAC
is not present, check CTh status. See "II.D.Thermistor Check." If CTh ohm
reading is in proper range, replace CM. If 115VAC is present, check for 115VAC
at CR #4 (BK) to neutral (W) and CR #6 (R) to neutral (W). If 115VAC is present
at CR #4 (BK) to neutral (W) but not at CR #6 (R) to neutral (W), replace CR.
If 115VAC is present at CR #6 (R) and Comp or ConFM are not energized, check
Comp start components, Comp protector (internal on 1-section, external on
2-section), and Comp motor winding continuity. If ConFM is not energized, check
ConFM fan blades for binding and motor winding continuity.
(2)
7-min. EvapFM delay timer terminates
: (note that the 7-min. EvapFM delay
time is a maximum; if the defrost thermistor cools to 25°F (-3.9°C) before the
7-min. EvapFM delay timer terminates, EvapFM icon turns on and EvapFM
energizes): 4 min. after Comp and ConFM energize, confirm EvapFM icon turns
on and EvapFM energizes. If not, confirm doors are closed and DS engaged.
Next, check for 115VAC at CM F5 (Y or W/BU) to neutral (W). If 115VAC is not
present, replace CM. If 115VAC is present, check for 115VAC at DSR #4 (DBU) to
neutral (W). If 115VAC is not present, check for 115VAC at DSR #6 (Y or W/BU)
to neutral (W). If 115VAC is present on DSR #6 (Y or W/BU) to neutral (W) and
not on DSR #4 (DBU) to neutral (W), replace DSR. If 115VAC is present on DSR
#4 (DBU) to neutral (W) and EvapFM is not energized, check EvapFM blades for
binding and EvapFM continuity.
(3)
18-min. temperature display delay timer terminates
: 11 min. after EvapFM
energizes, "dEF" is replaced by cabinet temperature on display. If not, replace
CM.
