Haswill STC-2304 User manual

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STC-2304 Thermostat
Quick Start Guide
(Version 21.08.02GEN)
STC-2304 owns 6 touch-sensitive keys, two sensors, and
three output relays to connect and control the
Refrigerator, defrosting unit, and evaporator fan.
1. Wiring Diagram
2. Lock/Unlock Keys
If you found the keys were locked, Hold the [ ] key
for 1s to unlock, the icon in the left bottom of the
screen will dim, It will auto-lock again if without
operation in the 30s.

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3. 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.
4. 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 without 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;

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5. Function Menu
Hold the [ ] key for 3s to see the Menu List.
Code
Function
F1
Defrosting Lasting Time
F2
Defrosting Cycle / Interval Time
Defrosting Cycle / Interval Time Count Mode
0
The sum working time of the controller
F3
1
The sum working time of the compressor
F4
Water dripping Time
F5
Defrosting by, 0is Electric-Thermal,1is Hot Gas
F6
Defrosting Stop Temperature
F7
Fan mode
F8
Time delay for fan 1st time running after pass F4
F9
Compressor Startup Protection / Delay time
F10
Alarm Delay time for this unit 1ST-time power on
F11
Over-Temperature Value to Trigger Alarm
F12
Alarm Delay time after time pass F10
F13
Temp. Calibration = Real Temp.-Measured Temp
6. Set the Fan
Five options are available in the fan mode F7

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F7
Description
≤-1
Fan startup earlier than the compressor
≥1
Fan startup later than the compressor
0
Fan keep synchronous with the compressor
C
Fan continuous working without interrupt
D
Fan continuous working except for the defrosting
time and water dripping time.
F7 &F8 are the difference between this unit and
STC-2303.
7. Set the defrosting
First, you should set the F2 defrosting interval time, since
A. when F2 = 0, the defrosting function was
disabled, then F1, F3, F4, F5 are useless;
B. When F2 > 0, The defrosting function works.
Next, configure the F5 that is the defrost method,
A. F5 = 0, Defrost by Electric-Thermal.
B. 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.

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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
Haswill Electronics
STC-2304 Defrost Fan Thermostat
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