Service Guide

(4) EvapFM Diagnosis: Conrm EvapFM de-energizes. If not, check for 115VAC at

DSR 4 (DBU) to neutral (W). If 115VAC is present, replace DSR.

2a) Time-Initiated Defrost-Termination: DTh warmes to 45°F (7.2°C). Ifnot, conrm

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 45°F (7.2°C), check DT and DH

continuity. Next, check DH amp draw.

(1) 3-min. Comp delay timer terminates: 3 min. after DH de-energizes, conrm

defrost icon turns off, Comp icon turns on, and Comp, ConFM, MH, and

PH energize. If not, conrm cabinet temperature is warm enough for Comp

operation. Next, check for 115VAC at CM C1 (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:

MH and PH Diagnosis: If MH and PH are de-energized, check for 115VAC at

CR 0 (P and O). If 115VAC is present at CM C1 (V) to neutral (W) and not at CR

0 (P and O), check HPS continuity. See "f) HPS Activation" above.

Comp and ConFM Diagnosis: Check for 115VAC at CR 0 (P and O). If 115VAC

is present at CM C1 (V) to neutral (W) and not at CR 0 (P and O), check HPS

continuity. See "f) HPS Activation" above. If 115VAC is present at CR 0 (P and

O) to neutral (W), 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 energizes, conrm EvapFM icon turns on and EvapFM

energizes. If not, conrm doors are closed and DS engaged. Next, check for

115VAC at CMF5 (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 (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.