20
button ” first to allow heating output. In the process of
self-adjustment, the controller will automatically control the
opening and closing of the cooling 1 compressor and the cooling
2 compressor according to the opening or closing of the
“cooling allow” button.
XV. Fault code description
If the upper row of digital displays on the controller
display the following fault code, the controller will turn off
all outputs.
Code Name
Fault Description
Sn－1
the fault of the first set temperature sensor or controller
itself
Sn－2
the fault of the first temperature sensor or controller
itself
Sn－3
4-20mA current input exceeds the upper limit (this alarm
will only occur when nod=1)
LP－1
low pressure alarm 1 alarm (alarm when closed)
LP－2
low pressure alarm 2 alarm (alarm when closed)
HP－1
high pressure alarm 1 alarm (alarm when closed)
HP－2
high pressure alarm 2 alarm (alarm when closed)
XVI. View and setting of temperature internal parameters
Press the “Set” button for 3 seconds, and the upper row
of the digital tube display the password prompt symbol “Lc”.
