(3)Both CTh and RTh reach 3.6°F (2°C) below setpoint
CabFM and PH continue. RailFM continues when rail cooling switch is in the
"NORMAL" position and per F9 setting when in the "LOW" position. For details, see "II.D.4.a) Switch Settings." Comp, ConFM, and CLLV
4.Cool Down Restart
a)Power Switch "ON," Rail Cooling Switch "OFF"
CTh warms to setpoint, the CabFM, CLLV, and PH continue. 2 minute Comp delay timer starts. After the 2 minute delay timer expires, Comp and ConFM energize.
Cycle continues until power is turned off, the 6 hour DT expires and CB initiates a cabinet defrost, or the "MANUAL DEFROST" button is pressed for 5 seconds
(evaporator temperature must be below 49°F (9.4°C)).
b)Power Switch "ON," Rail Cooling Switch "NORMAL" or "LOW" CTh, RTh, or both have warmed to setpoint.
(1)CTh at or above setpoint, RTh warms to setpoint
CabFM, Comp, ConFM, CLLV, PH, continue. RailFM continues when rail switch is in the "NORMAL" position and resumes continuous operation when in the "LOW" position. RLLV energizes.
(2)CTh warms to setpoint, RTh at or above setpoint
CabFM, Comp, ConFM, PH, RailFM, and RLLV continue. CLLV energizes.
(3)CTh or RTh warms to setpoint
CabFM, PH, RailFM (RailFM continues when rail switch is in the "NORMAL" position and resumes continuous operation when in the "LOW" position), and
RLLV continue. The 2 minute Comp delay timer starts. If CTh has warmed to setpoint and RTh has not, CLLV energizes and RLLV de‑energizes. If RTh has warmed to setpoint and CTh has not, RLLV continues and CLLV remains de‑energized. After the 2 minute Comp delay timer expires, Comp and ConFM energize.
5.Cabinet Defrost
The first cabinet defrost occurs 6 hours after the unit is turned on. Cabinet defrost is initiated when the 6 hour DT expires or the "MANUAL DEFROST" button is pressed for 5 seconds. Cabinet defrost termination occurs when the evaporator temperature reaches 49°F (9.4°C). Note that the defrost is a heated defrost, and therefore will have a tendency to raise the cabinet temperature. Cabinet temperature is not displayed during defrost; "dF" is displayed in its place. After defrost, there is a 5 minute delay before the compressor will start.
Note: To prevent Comp hard starts, CLLV (rail cooling switch "OFF") or RLLV (rail cooling switch "NORMAL" or "LOW") remains energized when Comp is off.
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