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10
Installation and Operations Manual
Status Compressor
Condenser
Fans
Evaporator
Fans
Defrost
Heaters
Notes
O
Display alternates “OFF” and Room
Temperature
O O O O
If unit shows “OFF”, depress
the “^” button and hold for
three seconds.
On Automatic Defrost on start up O O O On
If coil temperature is below
65° F. If it is above, defrost is
not initiated. Drip Time and
Freeze Time are ignored.
On
Defrost Sensor reaches 65° F and
defrost is terminated
O O O O
On Cooling Cycle initiated - Drip Time O O O O
System Timer Begins/2 min
drip time
On Drip Time of 2 minutes ends On On On O
Compressor and evaporator
fans start
On
Box Temperature (33.9° F) is
satised
O O On O
On Box temperature rises to 36° F On On On O
2° F Dierential, Minimum
Compressor O Time is 4
minutes
On
Defrost Initiated (manually or 6
hour counter)
O O O On Electric Defrost
On
Defrost terminated by temperature
65° F
On On On O
On Drip Time of 2 minutes ends On On On O
Compressor starts and
evaporator fans delay for 2
minutes to freeze coil
TABLE 6 Model PTT | Medium Temperature Models | EZY SETTING =2
SET POINT IS 34° F
These models are intended for cooler applications and have electric defrost. These models are intended for coolers that may be operated at
a lower saturated suction temperature and require electric defrost to clear the coil.
Status Compressor
Condenser
Fans
Evaporator
Fans
Defrost
Cycle
Notes
O
Display alternates “OFF” and Room
Temperature
O O O O
If unit shows “OFF”, depress
the “^” button and hold for
three seconds.
On Cooling Cycle initiated On On On O System Timer Begins
On
Box Temperature (37.9° F) is
satised
O O On O
On Box temperature rises to 40.0° F On On On O
2° F Dierential, Minimum
Compressor O Time is 4
minutes
On
Defrost Initiated (Manually or 6
hour counter)
O O On On Air Defrost
On
Defrost Terminated by time of 40
minutes
On On On O
TABLE 7 Model PTT | High Temperature Models | EZY SETTING =3
SET POINT IS 38° F
These models are intended for cooler applications and have air (O-cycle) defrost. The controller is pre-programmed for 4 defrost per day.
These periods are reprogrammable.
3. Controllers