10
Installation and Operations Manual
Status
Compressor
Condenser
Fans
Evaporator
Fans
Defrost
Heaters
Notes
Off
Display alternates “OFF” and Room
Temperature
Off
Off
Off
Off
If unit shows “OFF”, depress
the “^” button and hold for
three seconds.
On
Automatic Defrost on start up
Off
Off
Off
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
Off
Off
Off
Off
On
Cooling Cycle initiated - Drip Time
Off
Off
Off
Off
System Timer Begins/2 min
drip time
On
Drip Time of 2 minutes ends
On
On
On
Off
Compressor and evaporator
fans start
On
Box Temperature (33.9° F) is
satisfied
Off
Off
On
Off
On
Box temperature rises to 36° F
On
On
On
Off
2° F Differential, Minimum
Compressor Off Time is 4
minutes
On
Defrost Initiated (manually or 6
hour counter)
Off
Off
Off
On
Electric Defrost
On
Defrost terminated by temperature
65° F
On
On
On
Off
On
Drip Time of 2 minutes ends
On
On
On
Off
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
Off
Display alternates “OFF” and Room
Temperature
Off
Off
Off
Off
If unit shows “OFF”, depress
the “^” button and hold for
three seconds.
On
Cooling Cycle initiated
On
On
On
Off
System Timer Begins
On
Box Temperature (37.9° F) is
satisfied
Off
Off
On
Off
On
Box temperature rises to 40.0° F
On
On
On
Off
2° F Differential, Minimum
Compressor Off Time is 4
minutes
On
Defrost Initiated (Manually or 6
hour counter)
Off
Off
On
On
Air Defrost
On
Defrost Terminated by time of 40
minutes
On
On
On
Off
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 (Off-cycle) defrost. The controller is pre-programmed for 4 defrost per day.
These periods are reprogrammable.
3.
C
on
tr
ollers
