Elitech ATC-1550 Temperature Controller User Manual

Specification

ATC-1550 Panel Instruction

Panel display operation
ln display panel, it could display three digits, one status indicating symbol (key lock), four-parameter description words(heat on temp., cool on temp., defrost cycle, defrost time)
Under normal running status, all parameter description words indicators are off; when it enters to menu setting status, the corresponding parameter description word lights. Under normal status, if there is an output, the word “heat” will light during heating output and the word "cool" will light during cooling output. if defrost is running, the word"defrost" will light.

Working indicator status description

ATC-1550 Controller Operation

Controller unlock and lock
Under the controller lock status, press the "Unlock/OK" key for one second, it could be unlocked, and the buzzer will beep for about 0.5second at the same time. if no key operation within the 30s, it will lock automatically.

User menu setting
Under normal running status, press the “cool on temp set” key (or "heat on temp set"key), the corresponding parameter description word will light, and in the display window, it shows the value of “cool on"(or "heat on"), then it indicates that it has entered in the menu of “cool on temp set” (or " heat on temp set"). Then the parameter could be adjusted by pressing"Up Key" or"Down Key".Hold and press” Up Key" or"'Down Key" to adjust the parameters quickly. Undersetting status, press, and release "Unlock/OK" key or no key operation within the 30s, it will exit from setting status and save the parameters.

System menu setting
Under normal running status, press the "Unlock/OK" key for above 5s and it displays parameter code"F1" in the temperature display window, then it indicates that it has entered into the system setting menu. Press"Up Key" or"Down Key" to switch to other parameter code items; press“ Unlock/OK " key to display corresponding parameter value, then press"Up Key" or"Down Key"
to adjust the parameter. Hold and press"Up Key" or"Down Key", the parameter could be adjusted quickly. Press the"Unlock/OK" key to save the adjusted parameters and back to display parameter code.
Under system setting status, press the "Unlock/OK" key for 3s or no key operation within the 30s, it will save the modified parameters and exit from system setting status. If an error occurs during parameter saving, it displays “Err" in the temperature display window, and returns to normal display status in 5s.

Note* To avoid wrong setting, the setting range of “cool on temp. set", "heat on temp. set", "coolinghysteresis" and "heating hysteresis" are mutually restricted.

ATC-1550 Control

Cooling Relay 
Relay closure: When it is not in the status of defrosting if measured temperature exceeds “cool on temp. set", and compressor stop time exceeds set time delay, the compressor starts
Disconnection: When defrosting time finishes or when the measured temperature falls to the value "cool on temp. set”-"cooling hysteresis", compressor relay disconnects.

Heating Relay 
Relay closure: When the measured temperature falls to the setpoint "heat on temp. set".Disconnection: When the measured temperature rises to the setpoint "heat on temp. set”+" heating hysteresis"

ATC-1550 One-key Recover to Factory Default Value

Under lock status, press the” Up" key for more than 10s, it displays“rES" for 3s, Within these three seconds, presses the "Unlock/OK" key, the parameter could be recovered to the factory default, and displays“YES".If the error occurs during parameter saving, it displays“Err" in the temperature display window and enters to normal display status after three seconds. At this time, it is suggested to power on the controller again.

ATC-1550 Wiring Diagram