HASWILL ELECTRONICS STC-2304 Refrigeration Defrost Digital Thermostat User Guide

HASWILL ELECTRONICS STC-2304 Refrigeration Defrost Digital Thermostat

Quick Start

STC-2304 owns 6 touch-sensitive keys, two sensors, and three output relays to connect and control the Refrigerator, defrosting unit, and evaporator fan.

Wiring Diagram

Lock/Unlock Keys

If you found the keys were locked, Hold the [ ] key for 1s to unlock, the icon on the left bottom of the screen will dim, It will auto-lock again if without operation in the 30s.

Restore Factory Setting

Hold the  key for 10s, and the screen will show “RES”, now release the key and hold the  key for 3s;
The screen will display “YES” once it succeeds; Show “ERR” if failed, please power on again before trying.

Set the Aimed Temp Range

Unlike STC-2301/2302/2303, they own a heating mode. This thermostat only controls the refrigeration and defrosting, and fan, this unit is without an F14 code. The aimed temperature range was defined between the “On Temp.” and the “Off Temp.”.
Set the temperature for load starts/stops

1.  [On Temp] Key: touch this to check/edit the existing [Temperature for Load Turn On], the character “On Temp” lighting;
2. [Off Temp] Key.: touch this to check/edit the  existing [Temperature for Load Turn Off], the character “Off Temp” lighting;

Function Menu

Set the Fan

Five options are available in the fan mode F7

F7 & F8 are the difference between this unit and STC-2303.

Set the defrosting

First, you should set the F2 defrosting interval time, since

1.  when F2 = 0, the defrosting function was disabled, then F1, F3, F4, F5 are useless;
2. When F2 > 0, The defrosting function works.

Next, configure the F5 which is the defrost method,

1.  F5 = 0, Defrost by Electric-Thermal.
2. F5 = 1, Defrost by Hot Gas from the compressor reversal rotary

Then, change the F6 value; it is the stop line for defrosting. At last, to configure other parameters.

This is not a step-by-step user manual; It just shows the key points. The new user should read the Full-Content Version User Manual

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