Use and Care

19
True
glass door merchandisers
www
.truemfg.com
ElECTRONIC TEMpERATURE CONTROlS
lAE ElECTRONIC CONTROl GENERAl SEqUENCE Of OpERATION
1. Cabinet is plugged in.
a. Display will illuminate.
b. Interior light will illuminate on Glass Door Models only. Solid door cabinet lights are controlled by the door switch.
2. AftertheLAEcontrolpreprogrammedtimedelayofupto6minutes,thecompressorandevaporatorfan(s)will
start if the control is calling for cooling.
a. Control or condenser fans may be already pre-programmed from the factory so at the start of every compressor cycle or
during a defrost cycle, the condenser fan(s) will reverse for 30 seconds to blow dirt off the condensing coil.
3.TheLAEcontrolwillcyclethecompressorbutmayalsocycleevaporatorfan(s)onandoffdeterminedbythe
Set-Point and Differential temperatures.
a. The Set-Point is the adjustable preprogrammed temperature which shuts off the compressor and evaporator fan(s).
This is not the programmed cabinet temperature.
b. The Differential is the non adjustable preprogrammed temperature that is added to the Set-Point temperature that
will restart the compressor and evaporator fan(s).
 c. TheLAEcontrolisdesignedtoreadanddisplayacabinettemperaturenot a product temperature.
This cabinet temperature may reflect the refrigeration cycle of the Set-Point and it’s Differential.
The most accurate temperature on a cabinets operation is to verify the product temperature.
Example: If the Set-Point is -9°F/-23°C and the Differential is 10°F/5°C
(Set-Point) -9°F + 10 (Differential) = 1°F
Or
(Set-Point) -23°C + 5 (Differential) = -18°C
The compressor and evaporator fan(s) will cycle off -9°F/-23°C and back on at 1°F/-18°C
4. TheLAEcontrolmaybepreprogrammedtoinitiatedefrostbyintervaloratspecifictimesofday.
 a. Atthistimethe“dEF”willappearonthedisplayandcompressorwillturnoffuntilapreprogrammedtemperature
ordurationisreached.Duringthistimeforfreezersonly,evaporatorfan(s)willalsoturnoffandthecoilheaterand
draintubeheaterswillalsobeenergized.Somecabinetsmayalsochangetherotationofthereversingcondenser
fan motor.
b. After the preprogrammed temperature or duration for defrost has been reached there may be a short delay
forboththecompressorandevaporatorfanstorestart.Atthistime“dEF”maystillappearonthedisplayfora
short time.
lAE ElECTRONIC TEMpERATURE CONTROl GENERAl SEqUENCE Of OpERATION
t1 = supply air / return air* (thermostat)
t2 = coil / copper line (defrost)
t3 = return air / supply air* (display)
t3 probe is not installed and / or activated in all applications
with t3 is not installed and / or activated, the display probe is t1.
* STA, STG, STM, STR Models.