Service Manual

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• The appliance should be a minimum of 4" (11 cm) from side walls.
• A minimum of 10" (25 cm) overhead clearance should be provided for proper ventilation.
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: If Comp and ConFM do not
de-energize, conrm CTh status. See "IV.C. Thermistor Check." If CTh ohm reading is in
proper range and Comp and ConFM do not de-energize, replace CM.
9) Defrost
Temperature/Time-Initiated Defrost: Once DTh cools to 32°F (0°C), a 4-hour cumulative
Comp run timer starts. Once DTh is at or below 32°F (0°C) and 4-hour cumulative
Comp run timer terminates, MH and PH continue, DH energizes, and Comp, ConFM,
and EvapFM de-energize. Defrost Termination: DTh warms to 59°F (15°C). MH and
PH continue. DH de-energizes. 3-minute Comp delay timer starts, 8-minute EvapFM
delay timer starts (3-minutes on manually initiated defrost), and 13-minute temperature
display delay timer starts.
3-minute Comp delay timer terminates, Comp and ConFM energize. 5 minutes later,
8-minute EvapFM delay timer terminates and EvapFM energizes. 5 minutes after that,
13-minute temperature display delay timer terminates and cabinet temperature appears
on DM.
Defrost Diagnosis:
Defrost Initiation: Has DTh cooled to 32°F (0°C) or lower? Conrm DTh status. See
"IV.C. Thermistor Check." Has 4-hour Comp cumulative run timer satised. Check that
Comp, ConFM, and EvapFM de-energize. If not, check for 115VAC between CMC1 and
CMN5, then between CM F6 and CM N5. If 115VAC is present, replace CM. If there
is no voltage between CM C1 and CM N5 and Comp and ConFM do not de-energize,
check for 115VAC between CR terminal 1 and neutral (W wire). If 115VAC is present
between CR terminal 1 and neutral (W wire), replace CR. Conrm DH energizes. If not,
check for 115VAC between CM H4 and CMN5. If 115VAC is not present and DTh is in
proper range, replace CM. If 115VAC is present, conrm DH thermostat continuity, DH
amp draw, and DH continuity.
Defrost Termination: Has DTh warmed to 59°F (15°C)? If not yet conrmed, conrm
DTh status. See "IV.C. Thermistor Check." If DTh is good but defrost termination
temperature is not reached, conrm DH amp draw and continuity. If DTh is good and
defrost termination temperature is reached, DH de-energizes and 3 delay timers start.