Service Manual

16
6) Defrost–Manually initiated defrost, off cycle defrost, and time-initiated
temperature-terminated heated defrost.
1a) Manually-Initiated (All): Turn the TD all the way to the right. Wait 1 to 3 sec. then
back to original setting. Defrost initiated. If defrost does not initiate, wait 1 to 2 min.
and repeat process.
1b) Off Cycle-Initiated (UC/WT Refrigerators): Off cycle between cooling cycles.
CTh cools below TD setting. TD setting satised. Comp, CondFM, and EvapFM
de-energize.
1c) Temp/Time-Initiated (Heated) (Prep Table and All Freezers): 6-hr. Prep Table or
8-hr. Freezer DT terminates.
(1) Prep Tables: Comp and ConFM de-energizes, EvapFM continues. DH energizes.
5-min. minimum DT starts and 45-min. maximum DT starts.
(2) Freezers: Comp, ConFM, PH, MH, and EvapFM de-energize. DH energizes.
5-min. minimum DT starts and 1-hr maximum DT starts.
Note: When DTh is above 50°F (10°C) on Prep Tables or above 41°F (5°C) on
Freezers, defrost will not initiate and Prep Table 6-hr. DT and Freezer 8-hr.
DT resets and starts once DTh temperature cools below 50°F (10°C)on Prep
Tables or cools below 41°F (5°C) on Freezers.
2a) Manually-Terminated: Turn the TD all the way to the right. Wait 1 to 3 sec. then
back to original setting. Defrost terminated. If DH continues or Comp does not
energize, make several more attempts of manual termination.
2b) Off Cycle-Terminated: CTh warms above TD setting. Comp, CondFM, EvapFM
energize.
2c) Temperature or Time-Terminated: DTh achieves termination temperature or
backup DT terminates.
(1) Prep Tables: 46
°F (7.7°C) achieved or 45-min. backup DT terminates. DH
de-energizes. IfCTh calling for cooling, 1-min. Comp delay timer starts (drip time)
and 90-sec. EvapFM delay timer starts. 1-min. Comp delay timer terminates.
Comp and ConFM energize. 30 sec. later, 90-sec. EvapFM delay timer
terminates and EvapFM energizes.
Note: If DTh achieves 40°F before 90-sec. EvapFM delay timer terminates,
90-sec. EvapFM delay timer terminates and EvapFM energizes.
(2) Freezers: 50°F (10°C) achieved or 1-hr. DT terminates. DH de-energizes. If CTh
calling for cooling, 3-min. Comp delay timer starts (drip time) and 7-min. EvapFM
delay timer starts. 3-min. Comp delay timer terminates. Comp and ConFM
energize. 4min. later, 7-min. EvapFM delay timer terminates and EvapFM
energizes.
Note: If DTh achieves 25°F before 7-min. EvapFM delay timer terminates, 7-min.
EvapFM delay timer terminates and EvapFM energizes.