Hoshizaki AMERICA 73183 - Manual (Page 23)

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8) Cool Down Achieved–CTh cools to 3°F (1.7°C) below setpoint. EvapFM, MH, and
PH continue. Comp and ConFM de-energize. Diagnosis: Confirm Comp and ConFM
de-energize. If not, and Comp and ConFM were energized longer than 2 min., check
CTh status. See "II.D. Thermistor Check." If CTh ohm reading is in proper range and
Comp and ConFM continue longer than 2 min., check for 115VAC at CM C1 (R) to
neutral (W). If 115VAC is present, replace CM. If 115VAC is not present and Comp and
ConFM continue, check CR #1 (R) to neutral (W). If 115VAC is present, replace CR.
9) Defrost–The defrost icon turns on and "dEF" is displayed during defrost. There is a
5-min. minimum defrost time and a 1-hr. maximum defrost time.
1a) Temperature/Time-Initiated: DTh cools to 32°F (0°C), 4-hr. cumulative Comp
run timer starts. Once DTh is at or below 32°F (0°C) with 4-hr. cumulative Comp
run timer satisfied (Comp energized more than 4 hrs.), defrost icon turns on and
"dEF" is displayed. MH and PH continue. DH and DrH energize. If on, Comp and
EvapFM icons turn off. Comp, ConFM, and EvapFM de-energize.
1b) Manually-Initiated: To initiate a manual defrost, press the manual defrost button
on display. Comp and EvapFM icons turn off. Defrost icon turns on and "dEF" is
displayed. MH and PH continue. DH and DrH energize, Comp and EvapFM icons
turn off, Comp, ConFM, and EvapFM de-energize.
2a) Temperature/Time Initiated Defrost-Termination:
(1) DTh warms to 59 °F (15°C). Defrost icon, "dEF," MH, and PH continue. DH and
DrH de-energize. 3-min. Comp delay timer starts, 7-min. EvapFM delay timer
starts, and 18-min. temperature display delay timer starts.
(2) 3-min. Comp delay timer terminates. "dEF," MH, and PH continue. Defrost icon
turns off and Comp icon turns on and Comp and ConFM energize.
(3) 4 min. later, 7-min. EvapFM delay timer terminates. Comp, ConFM, "dEF," MH,
and PH continue. EvapFM icon turns on and EvapFM energizes. 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) 11-min. later, 18-min. temperature display delay timer terminates. "dEF" is
replaced by cabinet temperature.
2b) Manually Initiated Defrost-Termination:
(1) DTh warms to 59 °F (15°C). Defrost icon, "dEF," MH, and PH continue. DH and
DrH de-energize. 3-min. Comp, ConFM, and EvapFM delay timer starts, and
15-min. temperature display delay timer starts.
(2) 3-min. Comp, ConFM, and EvapFM delay timer terminates. "dEF," MH, and PH
continue. Defrost icon turns off, Comp and EvapFM icons turn on, and Comp,
ConFM, and EvapFM energize.
(3) 12-min. later, 15 min. temperature display timer terminates. "dEF" is replaced by
cabinet temperature.